Based on the description of decoupling degrees between China's environment and economic development, this paper makes a quantitative analysis of the relationship between the evolution of China's industrial structure and environment change. By using industrial characteristic bias (ICB) index and the data of 29 manufacturing sectors of each province with a time span of 1995-2010, this paper emphatically describes the impact of environment-pollution characteristic of industrial structure on the disparities of the regional environmental effect. The results show that the wastewater-discharge intensity of industrial structure in northwest China and most parts of central China reduced during this period, but this trend tended to decrease. The industrial structure of the southwest and southeast parts of China had a high level of industry solid waste discharge with constant intensification of the trend of SO2 emissions. The paper also analyzes the gross and recession of each sector of 8 regions of China during 1995-2010. The result showed that the middle reaches of the Yellow River, the north coastal area, and the northwest and southwest of China had an obvious growth in high environment pollution sectors, while the east and south coast areas, the Yangtze River and northeast China showed a contrary tendency. In addition, the paper employed regression analysis model to analyze the impact of evolution of on the disparities of the regional environmental effect. The results show that the regional industry structure is closely related to the environment quality especially for west China which is experiencing a stage of lower economic development level. At the end, this paper brings forward some suggestions on the industrial restructuring and environmental protection policies. It is important to develop the industries with high value-added, high degree of processing and high technology, and promote the transformation and upgrading of traditional industries.
Water and energy security are key issues in the sustainable development, which are also complex and sensitive in studies on international rivers. China is the most important upstream state in Asia, and even in the world. Its water resource change, impacts of hydropower development and trans-boundary water security maintenance of international rivers, are paid attention but with weak research. Under the rapidly expanding situation of hydropower developments on the international rivers within or beyond the borders by Chinese companies, characteristics, modes and experiences are urgently needed to be understood in spite of the relative cases in the world. After 32 hydropower cooperative cases with cost-benefit apportionments on 16 international rivers located in 5 continents in 1937-2010 are verified, the modes and characteristics of cost-benefit apportionments can be discovered based on detailed analysis of the cooperative schemes, the main results are: (1) hydropower cases are mainly developed on the reaches of international rivers and between two riparian countries, without cooperation at the river basin level, 3 types of cost-benefit apportionment modes are formed as equal ratio cost-benefit apportionment, equal one and unequal one; (2) on the cross-border rivers, the mode of equal ratio cost-benefit apportionment is the major one, upper-stream states can share the benefits from down-stream ones' power generation due to their water contribution for power generation, down-stream states usually should supply compensation to upper-stream ones in order to get their cooperation; on the frontier rivers/reaches, the mode of equal cost-benefit apportionment is the basic one; (3) the major apportionment modes have obvious differences among different developing phases, the major modes are equal one, and equal ratio one until the 1950s, equal apportionment is the basic mode in the 1950s-1990s, the major modes cannot be determined after the 1990s because of the limited cases; (4) the mode of equal apportionment is mainly used between the states with similar economic level; the states with a certain and big economic gap mainly use the ones of equal ratio one, and unequal one, and among which most of the cases are implemented with compensation schemes.
With the coming of the era of the knowledge economy, innovation has become one of the most important functions for cities. However, the role of cities in the regional innovation system has rarely been studied. This paper focuses on Beijing's urban innovation function to demonstrate its functional structure and strength and compares with other top Chinese cities in innovation such as Shanghai, Shenzhen, Guangzhou and Tianjin. Using the urban innovation function index and urban innovation specialization index, the paper examines Beijing's urban innovation structure, and innovation intensity compared with those of Shanghai, Shenzhen, Guangzhou and Tianjin. The results show that there exist some differences, but not substantiality, in urban innovation based on publications and granted patents. Beijing's innovation index ranks from high to low based publications from sectors of science-education-culture, transportation and information, finance and real estate, industry and construction, trade and business, and corporate departments. Based on patents granted, Beijing innovation index ranks from high to low in the order of industry, transportation and information sector, science-education-culture sector, construction sector, trade and business sector, corporate departments sector, and finance and real estate sector. Beijing has higher level innovation capabilities in almost all the sectors. Compared with Shanghai, Tianjin, Guangzhou and Shenzhen, Beijing's innovation functions in finance and real estate and construction sectors is weaker than those of Shanghai. Beijing's innovation intensity is the highest in science-education-culture industry, and is the lowest in the trade and business sector. Beijing's innovation intensity is stronger than that of Guangzhou and Shenzhen, but weaker than that of Shanghai and Tianjin based on publications. However, based on patents granted, Beijing's innovation intensity is the highest in industry, while the weakest in trade and business. This paper provides a basic method to study urban innovation functions through urban innovation structure and intensity to enrich the theoretical understanding of national and regional innovation systems.
By general difference index and multiple spatial data analysis such as kernel density estimate, this paper makes an analysis of spatial distribution of regional innovation output and its influencing factors in Zhejiang province. The results are as follows: from 2006 to 2012, there are great differences of regional innovation output in Zhejiang, featured by a slow fluctuated rising trend, which shows an obvious trend of unbalanced development. It is the main stage for the unbalanced development of regional innovation in Zhejiang from 2006 to 2009. The kernel density estimation shows that there are increasing differences in the regional innovation output in this province. The spatial density tends to change from relative equality to polarization. The spatial hot spots of regional innovation output are mainly concentrated in the northern and eastern parts of Zhejiang, while the spatial cold spots are mainly concentrated in the southwest. And what's more, the regional innovation output presents a concentrational trend with Hangzhou, Ningbo and the surrounding counties as the hotspot regions. The overall regional innovation output has its obvious spatial directivity which shows the spatial distribution of being high in the east, low in the west and high in the north, and low in the south. With time going by, the original trend which is high in the middle but low in both ends is gradually replaced by the increasing trend from west to east. Finally, a conclusion can be drawn from the regression analysis that spatial distribution of regional innovation output in Zhejiang is mainly influenced by four factors: economic growth foundation, innovation policies, technology spillover and spatial proximity. In 2006, economic growth foundation, innovation policies and technology spillover have a positive impact on spatial distribution of regional innovation output in this province. Compared with 2006, in 2012, technology spillover, spatial proximity and innovation policies become main factors. Corresponding suggestions are put forward subsequently: (1) promoting the high-tech industry construction actively. (2) formulating the corresponding policies and regulations to ensure that the development of regional innovation is institutionalized and standardized and has its procedures. (3) establishment of high-tech parks within the provincial range.
Investigating urban structures based on the intra-metropolitan location of economic activities (e.g. industrial districts or industrial clusters) is an increasingly important theme in empirical metropolitan studies. However, the lack of adequate research methodology has restricted the in-depth and fair exploration of mechanisms underpinning the formation of metropolitan industrial clusters, especially the differentiated roles played by two key processes-localization economies and inter-industry linkages. Therefore, based on existing literatures, this paper proposed an approach to systematically examine and detect the clustering of economic activities within a metropolitan area. Specifically, a modified, gravity model-based potential model is developed to spatialize sectoral data and measure the potential of each economic sector in every spatial unit, taking into account its location relative to firms in that sector at different spatial units. For each city street block and sector, potential is inversely proportional to the distance-decay parameter that is systematically adjusted to capture the varying weights of firms in that sector at nearby and distant locations. To evaluate the inter-correlations among potentials, which help detect geographic clustering model among economic sectors, principal component analysis (PCA) is used. Sectors loading strongly onto a component share similar location patterns. The city of Shenyang and its data from 2008 Second Economic Census (i.e. number of firms in different economic sectors at the city street block level) are used for empirical analysis. Analytical results reveal that interrelations or geographic clustering model among economic sectors in Shenyang are formed primarily because of inter-industry linkages, with the exception of the spatial interconnection among transportation, warehousing and postal services, which is forged, based on localization economies. Water conservancy, environmental protection and public facility management are closely correlated to manufacturing, and their geographic clustering model largely follows patterns of adjacent-street block clustering or across-street block clustering. The sectoral geographic clustering model of water conservancy, environmental protection and public facility management, and healthcare and social welfare, as well as public management and organizations, follows the pattern of within-city block clustering. The central business district in Shenyang where various service sectors concentrated offers many services to manufacturing sectors and thus plays an important role in the locations of manufacturing activities. Manufacturing locations, in turn, strongly affect the locational choices of transportation, warehousing and postal activities. Overall, the spatial organization of economic activities in Shenyang metropolitan area is characterized by a structure of single center and concentric rings. Large-scale decentralization and poly-nucleation of economic activities are not apparent within the metropolitan area. These revelations from the modeling generally match the reality and suggest that the model proposed by this research is capable of exploring spatial patterns and mechanisms of industrial clusters, particularly geographic clustering model (or collocations) among different sectors in the metropolitan context, thus contributing the understanding city structures.
In recent years, increasing interest has been focused on the Quaternary Red Clay (QRC) in the middle and lower reaches of the Yangtze River. The QRC profiles generally contain two parts, the Xiashu Loess(XSL) or Homogeneous Red Clay (HRC) on the topside and the Vermicular Red Clay (VRC) below. The provenance of the QRC was discussed furiously. Some scholars believed that Xuancheng, Jiujiang, and Jinhua etc. share the similar characteristics with the XSL, which may originate from aeolian dust deposit. But the others believed that the QRC in Jinhua and Changsha etc. was deposited by flood. Because of these arguments, this paper collected the QRC samples from Jiujiang (JJ), Jiangxi province; Jinhua (TX), Zhejiang province; Changsha (CS), Hunan province; Nanchang (NC), Jiangxi province; Xinyu (XY) Jiangxi province; Nanping (NP), Fujiang province.Discriminant analysis is a usual method in statistical analysis; it can be used to identify the objects in two groups, and have been widely applied. In this paper, the two groups of training samples were floodplain deposits (FPD) from Nantong (NT) and Jinhua (TG), aeolian dust deposits (ADD) of Malan Loess from Luochuan (LC) and Yili (ZS); the testing samples contained the QRC, FPD in Qidong (QD), Xiashu Leoss from Nanjing (XG) and Malan Loess from Zeketai (ZKT). The discriminate results of QRC were complicated. The samples from NP were all identified as ADD; the samples from JJ, NC, TX and CS were identified as both FPD and ADD. On the topside of the QRC profile, the XSL and HRC were always identified as ADD, and the VRC at the bottom of the profile were not only FPD but also ADD.The identification result of QRC suggests that the provenances of QRC from the middle and lower reaches of the Yangtze River are not only floodplains but also aeolian dust deposits. The north plains of Yangtze River are the dominant dust sources for the QRC which are identified as FPD. The QRC which is identified as ADD is deposited by the winter monsoon, and the aeolian characteristics decreased with latitude reduction and terrain fluctuation.
An accurate assessment prior to the contaminated site remediation is essential and pre-conditional to carry out a site remediation project. In this study, a system to calculate the pollution volumetric of BaP in a contaminated site based on three-dimensional interpolation is set up to simulate the spatial distribution of soil benzopyrene (BaP) and analyze its uncertainty. The results show that BaP content underground in the contaminated sites accords to the log normal distribution, while the southwest and north of the studied area was seriously polluted. By ordinary kriging interpolation, the volume of BaP plume concentration higher than 0.4 mg·kg-1 was calculated to be 14134 m3 corresponding to the accumulation probability of 0.585. By variation range of values, the describing level of the existing data collected at the sites was calculated to be 65%. The spatial distribution features of the contaminations at the sites are thus accurately represented by this method with the uncertainty analysis served as reference for supplement sample stationing and precisely accurate evaluation.
There are lots of late Quaternary fluvial and lacustrine sedimentary strata in the middle reaches of inland rivers in arid China, and these sediments have already been widely used to reconstruct paleo-climate and paleo-environment. So far, most of the studies have only attached importance to the physical, chemical and biological proxies of sediments, but they are lack of the meaning of sedimentary facies, which may lead to some misunderstandings of paleo-environment reconstruction. Concerning this issue, we analyzed chronology, sedimentary facies, lithology and grain size parameters of a Holocene section named JDT in the Shiyang River's middle reaches in the arid areas of China, and compared them with the data of geochemical and pollen proxies from a section named HSH in surrounding areas. The results show that there is a coherence of these two sections, and we can reconstruct the deposition process during ~8500-~3000 cal yr BP. We can divide the section into six phases from the bottom to the top: fluvial face (part F)—fluvial and lacustrine face (part E)—lacustrine face (part D)—shallow lake-eolian deposit (part C)—eolian deposit (part B)—eolian deposit (part A). We comprehensively analyzed lithological, sedimentary facies and paleo-environment proxies, and found that the sedimentary facies change from fluvial facies to lacustrine facies and eolian deposit, and from that we can know the Holocene environment in this area was becoming drier and drier. The reason why there are some differences between this study and the previous studies is that the analyses of this study are based on the changes of sedimentary facies.
With the development of global climate change, extreme climate events have drawn attention of worldwide researchers not only due to their direct impact on socio-economy, but also as climate change indicators. Human and natural systems have been affected by extreme climate events to a great extent. The main objective of our study is to detect the possible changes and intensity, tendency and frequency of extreme climate events. Xinjiang is located in the inland China, where the climate is arid to semi-arid. Xinjiang is therefore highly vulnerable to climate variability, and a better understanding of changes in extreme precipitation events plays an increasingly role in the arrangement of agricultural production and the process of agricultural planning. Fourteen extreme precipitation indices have been selected and spatiotemporal patterns of extreme precipitation events have been analyzed based on daily precipitation data from 50 stations covering the period of 1961-2010 using statistical methods. The results indicate that precipitation amount is in an upward trend with increasing precipitation intensity and precipitation frequency. With the increase of precipitation, evident decrease of CDD can be found and increasing trend can be identified by RR1, RR5, RR10, R95P, Rx1day and Rx5day. This result show obvious wetting tendency in Xinjiang. However, different time periods are dominated by different changing properties of precipitation regimes. With smaller variability and higher stability, precipitation amount level during 1960-1970s is lower. The period of 1980-1990s can be taken as the transitional period characterized by abrupt increase of precipitation amount and lower stability, and according to unsteady precipitation variations in recent years, higher precipitation variability can be found after the 1990s. Spatially, increasing and decreasing trends of precipitation variations alternate in eastern Xinjiang with small amplitudes; however, evident increase of precipitation can be found in the northern, southern and the entire Xinjiang region. Alteration of precipitation variations was found mainly in 1986 and 2009. After occurrence of precipitation alteration, strong precipitation processes are subject to higher variability and moderate changing characteristics are found in weak precipitation processes. This study will be of great merits in terms of development of human understanding of regional responses of hydrological cycle to climate changes in Xinjiang.
As the largest developing country in the world, China has faced the most serious challenge to urban land expansion, which is rare in the world. Drawing upon the Landsat TM satellite images of Nanjing in 1985, 1995, 2000 and 2007, this paper integrates convex-hull analysis, shared boundary analysis and matrix analysis to distinguish different types of urban land expansion. We also investigate the restructuring of urban land in the course of spread expansion. The results showed that Nanjing has experienced rapid expansion of construction land from 1985 to 2007. And the infilling expansion was initially focused on the areas near the city center, and showed a trend of outward expansion recently; the enclave expansion was centered on development zones, industrial parks and university towns, which were disconnected from the original urban area; the spread expansion was not only concentrated around the original built-up areas, but also expanded from the previous enclave areas. With respect to the functional characteristics of newly developed urban land, the infilling expansion was initially dominated by residential land and was recently featured by a mix of residential and industrial land; the land expansion was characterized by a mix of residential and industrial land, while it has shifted towards land for industrial purposes; the enclave expansion was consistently dominated by land for industrial purposes, along with land expansion for science & education purposes. The new types of urban land use was characterized by the strengthening of its original function, which reflected a rapid industrialization process. Results derived from regression analyses of influencing factors further pointed to the following findings: the infilling expansion and the spread expansion were demand-driven; in comparison with the infilling expansion, the spread expansion was more sensitive to demand-related factors; and the enclave expansion was mainly cost-driving. We also found that, with the continued urban expansion, the expansion of built-up area was increasingly constrained by cost-related factors. However, with the increased proportion of industrial land, revenue-related factors have been strengthening their roles. In the future, the local government of Nanjing should play the role of the central city in the Yangtze River Delta and intensify Nanjing metropolitan governance by making up scientific and rational urban plans, adjusting the structure of the construction land, accelerating industrial restructuring and upgrading, and promoting the development of sub-centers as well.
The notion of urban-rural cultural integration (URCI) has become a new focus in cultural geography, given that the problem of the imbalance between urban and rural cultural development has raised great concern in the process of urbanization practice. The existing researches on URCI, however, are unable to effectively meet the application requirements of the integration of Chinese urban and rural culture, and also do not meet the internal demand for human geography discipline development. Taking Wuhan metropolitan circle as an example, this paper explicitly proposed the concept of integration degree of urban-rural culture based on a brief analysis of spatial-temporal pattern for urban-rural culture. Then, the spatial-temporal measure model of URCI was creatively constructed through analyzing the time dimension of URCI, the population who is sensitive to urban and rural culture, the cultural information flow between urban and rural areas, and the shortest path of cultural transmission from urban to rural area. On county/city scale, spatial-temporal structures and development patterns of URCI in the case area from 1980 to 2010 were explored, with the method of entropy, factor analysis and network analysis. The research demonstrated that: (1) spatial-temporal development patterns of URCI, namely, the plaque-type development in the embryonic stage, the wave-like development in the formative stage, the corridor-type development in the stage of diffusion and agglomeration and the network development in the prosperous stage, generally complied with the "point-axis" theory of regional social and economic expansion; (2) they followed the basic law that the more the society and economy developed, the stronger the spatial correlation of the road network between urban and rural areaa was and the more cultural factors between urban and rural areaa flowed reciprocally, the more perfect the spatial structure of URCI became; (3) the development degree of spatial structure of urban-rural culture was also consistent with the rule of circle differentiation that the "core area" is greater than "reception ward".
Ecotourism contributes to both environmental conservation and the economy, and has become the optimal choice of prohibited development zone. Local residents are the essential stakeholder groups, and thus their participation behavior plays a key role in ecotourism development. This paper, on the basis of previous findings, constructs an integrative SEM model of ecotourism cognition, attitude, participation intention and participation behavior. The primary data is collected from the residents in the National Scenic Area of Dongjiang Lake, and is analyzed with the aid of the software of SPSS 15.0 and AMOS 7.0. The findings are as follows: (1) The modified model explains 90.7% of the variance in ecotourism participation behavior, showing the strong predictive power of the model; (2) ecotourism cognition cognition has a direct effect on participation behavior with a path coefficient of 0.374; (3) ecotourism has an indirect effect on participation behavior mediated by ecotourism attitude and participation intention. Based on the above conclusions, the approaches to enhancing residents' ecotourism participation are put forward.
With the rapid urbanization and industrialization process during the last three decades, traditional Chinese rural villages had been reshaped in different directions. On the one hand, most of the traditional agriculture-dominated villages are gradually declining and becoming blighted by depopulation and the abandonment of buildings and land, which is called “village-hollowing”. On the other hand, with the introduction and development of various industries in rural areas, some new types of villages (industry-dominated rural development type (IDT), rural development type focusing on business, tourism and services industries (BTT), and balanced rural development type (BDT)) are constantly emerging and have become the main form of rural urbanization in China. However, all of the transfermation process is alike in the reconstruction of the social space. Social-spatial reconstruction is also a significant component of the study on rural transformation development (RTD), among which tourism villages are an important type. Integrating the methods of participatory rural assessment (PRA), GIS spatial analysis and remote sensing images, this study performs an analysis of the social-patial evolution process of tourism villages, through a case study of Gougezhuang village, in Yesanpo tourism area, Hebei province, China. In the paper, both qualitative and quantitative data were collected using primary and secondary data sources, including policy documents, journal articles, land-use map (1:2000) in 2007 provided by local governments and high spatial resolution remote sensing image from Google earth. The results indicate that Gougezhuang village had gone through a drastic social reconstruction from 1985 to 2012, with the traditional rural community based on kinship gradually transforming to a tourist town based on economic benefits. This reconstruction was manifested in the following three aspects: (i) From the perspective of physical space, private space is decreasing from 95% to 15% of the total area, while the semi-public and public space for tourism purpose is increasing, form 0 to 76%; besides, as to the residential pattern, traditional enclosed courtyard is gradually disappearing, displaced by the open multi-storey building. (ii) From the perspective of demographic composition and social relations, the massive population influx represented by tourists, tourism employees and investors had resulted in the substantial alteration of rural social structure, exhibiting an obvious trend of spatial polarization as well. The rural community relationship based on blood lineage is continuously weakened and replaced by more complicated commercial leasing and employment relationship. (iii) The income gap is constantly widening, fostering the formation and discrimination of social classes among rural communities. The rapid tourism development and massive immigration dominated by tourists are the major external driving forces of the rural social stratum discrimination and social relation reconstruction. In addition, the micro-scale location condition, such as the traffic condition and landscape quality, has further intensified the spatial discrimination of social structure and relationship. The social spatial morphology of tourism villages, in essence, can be seen as the transitional form between urban and rural communities, presenting periodic characteristics due to the seasonality of tourism activities. Apparently, the traditional management system is not able to effectively support tourism development in an export-oriented rural community generally engaged in providing tourism services, which will hinder the sustainable development of rural tourism and tourism village development. Thus, corresponding with the social spatial reconstruction of tourism villages, the establishment of new-type community management system, regulation of tourism industrial practice and reconstruction of rural community culture are urgent for the sustainable development of tourism villages.
This article uses the HP and BP filter, and seasonal index to analyse the periodic and fluctuant characteristics of the annual and monthly data of Chinese mainland's inbound tourists. Combined with the impulse response model, it studies the influence mechanism. The results show that: the total number of inbound tourists has risen in fluctuation since 1978, and shows a decline trend in 1989, 2003 and 2009. According to the filter decomposition, it can divide the development of inbound tourism into 5 periods: (1) the initial stage (1978-1983), (2) the period of exploration (1984-1989), (3) the preliminary development period (1990-1996), (4) the rapid development period (1997-2003), and (5) a relatively mature period (2004-2011), with the average period being about 6.6 years. The seasonal strength index of Chinese inbound tourism generally presents the "inverted-V shape" distribution; the seasonal variation index generally presents a "double-W shape" distribution. Compared with the annual data, the fluctuant effect of monthly data is more obvious. Policies and institution, regional economy and unexpected events have a significant impact on the period and fluctuation of inbound tourists. Through the analysis of impulse response, it is found that the foreign economic exchange and regional economic development have a positive impact on inbound tourists; however, different modes of transportation have different response mechanism to inbound tourists. In term of the periodic and fluctuant characteristics of inbound tourists, it is suggested that we should enhance the quality of tourists, strengthen the publicity and marketing, adjust the management mode and development strategy in time; in addition, we should balance the development of three major inbound tourism markets, and reduce the risks of the inbound tourism market in the future.
The study on the regional tourism development patterns has become a hotspot in the field of tourism geographies. In recent years, domestic and foreign scholars have mainly focused on the tourism strength, tourism development efficiency, tourism competitiveness, tourism development spatial difference, tourism development spatial patterns and etc. The spatio-temporal evolution of city tourism is the hot-spot of tourism geographies research. This article, choosing China's eastern coastal cities as the research objective, analyzes the temporal and spatial evolution patterns of tourism development. First, it comes to the analysis of the spatio-temporal evolution of coastal city tourism development strength, and then it analyses the spatio-temporal evolution of coastal city tourism development efficiency by DEA data envelopment method.Results show that in the aspect of tourism development strength, there is great difference among the eastern coastal cities. The tourism development strength in the cities of Yangtze River Delta Economic Zone, Pearl River Delta Economic Zone, Liaodong Peninsula and Shandong Peninsula in Bohai Economic Circle is strong, but that on the west side of the Straits Economic Zone and Beibu Gulf Economic Zone is weak. During the ten years, the comprehensive efficiency of tourism development basically maintained unchanged; however, the pure technical efficiency is remarkably enhanced, and the scale efficiency is reduced significantly, which indicates that the development of the coastal city tourism has gradually changed from scale efficiency to technical efficiency. Moreover, through the data analysis of the years of 2002, 2006 and 2011, it is found that as time goes by, the polarization efficiency of tourism development comprehensive efficiency has also increased.
Historic evolution of spatial pattern for water resources development and utilization in the Heihe River basin is representative in the arid regions of Northwest China. Reconstructing the spatial pattern and accumulating the experiences in historical periods could provide valuable references for water resources exploitation in modern times. Using historical documents, ancient and modern maps as well as remote sensing images as data sources and combined with a series of field investigations, this paper reconstructed the spatial pattern of historic water resources development and utilization in the Heihe River basin and analyzed the spatial evolution with the aid of geographical information system. The results indicated that large-scale water resources development and utilization in this basin started in the Han Dynasty, with its scope covering most parts of plains and deltas in the middle and lower reaches. The development activity was inherited in the Wei-Jin, Southern & Northern dynasties but shrank obviously in some local parts. In the Sui and Tang dynasties, large irrigated areas were distributed in midstream but they were destroyed by Tubo's invasion in the mid-Tang Dynasty. In the Song and Yuan dynasties, there were only small ranges in core oasis regions. From the Ming Dynasty to the Republic of China, the number and density of channels increased dramatically, expanding to river origins and their peripherial areas even in the regions near mountains with high elevation in the south. Thus the strength and scale of water resources development and utilization rose continuously, which laid the groundwork in modern times. However, nomadism dominated in the downstream and large-scale water resources development and utilization did not exist in these periods. It can be observed that water resources development and utilization before the Ming Dynasty fluctuated frequently with several rises and falls, while the sharp contrast can be observed between the middle and lower reaches, with stable expansions of irrigated areas in midstream and depressed conditions in downstream respectively. In addition, irrational water resources utilization led to ecological problems such as recession of terminal lakes, soil salinization, and desertification.
According to the input-output relationship of cultivated land per unit, this paper constructs a stochastic frontier production function to estimate the cultivated land use efficiency and analyzes the regional characteristics of its influencing factors using a panel data of 281 prefectural cities in China from 2001 to 2011. Our first main result is that the cultivated land use efficiency increases steadily but still remains at a relatively low level since 2001. Meanwhile, the regional difference of cultivated land use efficiency is quite apparent. The efficiency decreases with the following order: the eastern, central, northeastern, northwestern and southwestern China, and grows fastest in the northeastern region. The study of influencing factors of cultivated land use efficiency suggests that: (1) Total personal postal and telecommunication services, agricultural loan scale and the exemption of agricultural tax have significant positive effect in different ways on cultivated land use efficiency in the regions above. (2) The proportion of effective irrigation area of cultivated land has positive influence on cultivated land use efficiency in the central, northwestern, southwestern regions respectively. (3) The proportion of crop acreage has a positive effect on cultivated land use efficiency in the central region, while negative in the southwestern. (4) The scale of cultivated land per labor has the strongest positive effect in the central and southwestern regions. (5) Total freight has a positive impact in the eastern, central, northeastern, northwestern regions. Several feasible suggestions are concluded from the study. First, innovate the operating mechanism and improve the capability of agricultural public services. Second, promote land transfer and expand the expenditure of agricultural loan scale and cultivate the scale operation of cultivated land. Third, reinforce the construction of the transportation and information service infrastructure in villages, and consummate agricultural product market system. Fourth, increase agricultural water conservancy facilities in the central and western regions. Fifth, enlarge the food cultivated area in the eastern and central regions, and strengthen the construction of grain production base in the central region, and expand the area of industrial crops and support featured agriculture in the southwestern region.
It is an important and significant task to improve the efficiency of urban land use for the development of new-type urbanization. This study takes the precise recognition of the influencing mechanism of new-type urbanization in intensive urban land use as a basis, and employs the dynamic principal components analysis to discuss the spatial-temporal evolution of new-type urbanization and intensive urban land use during the period from 2006 to 2011 with the aid of SPSS 19.0 software. Moreover, spatial panel econometrics model is used to reveal the relationship between these two variables on new-type urbanization and intensive urban land use by employing the panel data on 29 provinces of China during the period 2006-2011. Major conclusions can be drawn as follows: (1) In general, both the comprehensive level of new-type urbanization and intensive urban land use show stable upward trends and tend to be convergent; (2) The performances of relationship between new-type urbanization and intensive urban land use are various in eastern, central, western China, and among the three regions. Both the interprovincial gap between the eastern and western regions, and the intra-gap among the three regions are main causes for the overall gap. The spatial-temporal evolution trend reveals that these two variables show a significant geographical agglomeration and incremental clustering characteristic. What's more, the spatial pattern presents a more apparent similarity and synchronization of cluster evolution trend. Besides, the spatial pattern of new-type urbanization has "geographical features of three vertical and two horizontal lines", while spatial distribution of the intensive urban land use shows a gradient in agglomeration from the east to the inland areas; (3) The intensive urban land use has a more significant positive spatial correlation, which shows an upward trend. This implies that new-type urbanization plays a significant role in improving intensive land use both in the whole country and in the regions.
Belonging to restricted development zones at both national and provincial level, northwestern Shanxi province has inherent vulnerability of natural ecosystems which have caused land desertification, water and soil loss, and farmers' poverty. Since 2000, the urbanization of farmers in ecological fragile region of northwestern Shanxi has been growing rapidly. Forming an interaction chain of “transformation from agricultural to non-agricultural livelihoods of urbanized farmers—farmland transfer—scale management of farmland—improvement of rural residents' income—ecological restoration and protection” could provide a new way of reducing population pressure on land and restoring ecological environment in the study area. The key point of this interaction chain is the sustainable non-agricultural livelihoods of urbanized farmers. Using DFID model—a sustainable livelihoods (SL) framework which is the most widely applied all over the world as reference, and taking Shuozhou—a big city in northwestern Shanxi for an empirical study, this paper quantitatively measures the complicated influencing mechanism between vulnerability context, livelihoods capitals, livelihoods strategies, and livelihoods outcomes. The results show that: (1) the vulnerability context has a significant negative impact on livelihoods strategies, and it negatively influences livelihoods outcomes indirectly through livelihoods strategies as well. (2) Human capital, physical capital, and financial capital have a positive impact on livelihoods strategies of non-agricultural labor remaining in the city. In livelihoods capitals, only physical capital has impact on the nature of employment. (3) Human capital has a significant positive impact on both career level and richness of entertainment life. Social capital has not exerted significant impact on career level, but has positive impact on the income increase after the farmers moved into the cities. Financial capital shows a significant positive impact on the richness of entertainment life. (4) The livelihoods strategies of non-agricultural labor remaining in the city have a positive impact on the richness of entertainment life. Besides, the nature of employment displays a positive impact on income increase.
The promotion of comprehensive quality plays key roles in solving ancient villages' problems and enhancing its sustainable development. This study samples 101 ancient villages in Huangshan city as cases. A set of indicators for comprehensive quality on evaluating ancient villages is constructed, and the spatial difference of these indicators is studied through GIS. The results indicate the scores for ecological capacity quality, residential facilities quality, economic development quality and history culture quality, are 4.23, 3.50, 3.27 and 2.87 respectively, and the history culture quality has become a constraint for improving comprehensive quality of ancient villages in Huangshan city. The spatial gradients are obvious, and suggest that comprehensive quality of ancient villages decreased from northeast to southwest, corresponding to the higher and lower heterogeneity regions. It is also indicated that the influences of urban economy and infrastructure on ancient villages are significant, and the spatial gradients for urban-rural area, expressways and scenic areas are obvious.