土地利用变化与城市代谢间的研究为全球变化的核心计划,是当前生态环境研究的热点问题。本研究以Odum的能值评估方法为分析工具,以广州生态-经济-社会系统为研究范围,以1990~2006年的资源流动量核算17年来广州城市代谢的演变情况,并在此基础上从整体角度探讨了广州城市代谢与土地利用变化的互动关系,结果表明:(1)广州市近年来各类土地使用面积变化尤其是建设用地的增长,大大影响了广州城市代谢过程中的各项物质流与能量流,能量由自然地区与农业地区向城市地区集中,代谢强度增大给代谢过程带来压力,广州城市代谢效率呈现出下降趋势。(2)外界输入资源在代谢中扮演重要角色,伴随产业的转型,广州市在城市扩张的过程中,消耗了大量的石油等矿物燃料、水泥等建材资源,增加了城市的环境负荷,能值可持续性指数逐渐降低。(3)广州市1990年以来农地面积虽然逐渐减少,农地的能值密度呈下降趋势,但农地的总能值效益得到提高,这主要是由于近年来农业生产逐渐由低能值转换率的水稻生产转变为高能值转换率的蔬菜等产品为主。本文可为广州市土地规划与管理提供重要依据和新的思路。
The study on the interaction between land use change and urban metabolism, which is the core of Global Change Programme, has currently come into lively discussion in the field of ecological research. On the whole ecologic-economic-social system of Guangzhou, this paper analyzes the emergy-based urban metabolism in the past 17 years with reference to the resource flows from 1990 to 2006 and investigates this interaction of the metabolism and land-change of Guangzhou. It finds out the truth that various types of land-use changes had remarkable influence on the material and energy flows during the metabolic course, especially the fast rise of the construction land. The more construction land the city increases, the more total solar emergy it consumes, which makes a decline in the emergy sustainable indices. The per unit area energy consumption also increases in the process of urban expansion with a large amount of depletion of minerals, fuels and building resources. Because of the growing environmental load, the emergy yield ratio is decreasing year by year. At the same time, the emergy efficiency of farmland has been enhanced while there has been a decrease in the amount of farmland and a downward trend of emergy density since 1990. The results can provide an important basis and new ideas for the land planning and management of Guangzhou.
[1] Wolman A. The metabolism of the city. Scientific American,1965, 213(3):179~190.
[2] Newcombe K, Kalina J D, Aston A R.The metabolism of a city:The case of Hong Kong.AMBIO,1978,7:3 ~5.
[3] 颜文洪.深圳城市系统代谢的变化与废物生成效应.城市问题.2003,33(1):40~44.
[4] 董孝斌,高旺盛.黄土高原丘陵沟壑区典型县城的能值分析.水土保持学报.2004,59(2):89~92.
[5] 于术桐,黄贤金.区域系统物质代谢研究——以江苏省南通市为例.自然资源学报.2005,20(2):212~221.
[6] 张妍,杨志峰.北京城市物质代谢的能值分析与生态效率的评估.环境科学学报.2007,27(11):1892~1899.
[7] 张妍,杨志峰.一种分析城市代谢系统互动关系的方法.环境科学学报.2009,29(1):217~224.
[8] Niza S, Rosado L, Ferrao P. Urban metabolism: Methodological advances in urban material flow accounting based on the Lisbon case.Journal of Industrial Ecology, 2009,13(3):384~405.
[9] Barles S.A material flow analysis of Paris and its region.Renewables in a changing climate-innovation in the built environment. Proceedings of the International Conference CISBAT, 2007,9(4-5):579~584.
[10] 刘晔,耿涌,董金娟等.基于MSIASM方法的沈阳城市代谢研究.生态科学,2010,29(3):256~261.
[11] Huang S L, Lee C L, Chen C W.Socioeconomic metabolism in Taiwan: Energy synthesis versus material analysis. Resource Conservation Recycling, 2006, 48(2):96~166.
[12] Krausmann F, Haberl H.The process of industrialization from the perspective of energetic metabolism: Socio-economic energy flows in Austria 1830-1995. Ecological Economics, 2002,41:177~201.
[13] Krausmann F, Haberl H, Schulz N B, et al.Land-use change and socio-economic metabolism in Austria, Part I: Driving forces of land-use change 1950-1995. Land Use Policy, 2003,20:1~20.
[14] Huang S L, William W P, Chan S L.et al. Stream order, hierarchy, and energy convergence of land use . Landscape and Urban Planning, 2007, 205:55~264.
[15] 黄贤金,于术桐,等.区域土地利用变化的物质代谢响应初步研究.自然资源学报, 2006,1:1~8.
[16] 刘勇.城市形态与城市物质代谢效率的相关性分析.城市发展研究.2010,17(6):27~32.
[17] 吴泽斌,刘卫东,汪友结等.城市土地生态利用水平测度及障碍因子诊断.中国人口资源环境.2010,20(2):24~29.
[18] Huang S L, Yeh C J, Chang L F.The transition to an urbanizing world and the demand for natural resources. Current Opinion in Environmental Sustainability, 2010,2:136~143.
[19] Odum H T, Odum E C.A Prosperous Way Down. Boulder: University Press of Colorado Univ. 2001.89~130.
[20] Odum H T, Brown M T,Brandt-Williams S.Introduction and global budget(Folio#1).In: Handbook of emergy evaluation. Gainesville:University of Florida Center for Environmental Policy, 2000.1~15.
[21] Odum H T. Environmental Accounting:Emergy and Environmental Decision Making.New York:John Wiley and Sons, 1996.31~55.
[22] Ulgiati S, Brown M T.Monitoring patterns of sustainability in natural and man-made ecosystems. Ecological Modelling, 1998,108(1-3):23~26.
