地理研究 ›› 2015, Vol. 34 ›› Issue (6): 1259-1269.

所属专题: 人地系统

• 研究论文 • 上一篇    下一篇

基于坡耕地与聚落空间耦合的三峡库区腹地奉节县人地关系研究

甘彩红1,2(), 李阳兵1,2(), 陈萌萌1,2   

  1. 1.重庆师范大学地理与旅游学院,重庆 400047
    2.重庆师范大学地理信息系统应用研究重点实验室,重庆 400047
  • 收稿日期:2015-01-13 修回日期:2015-04-13 出版日期:2015-08-19 发布日期:2015-08-08
  • 作者简介:

    作者简介: 甘彩红(1988-),女,四川自贡人,硕士,从事水土保持研究。 E-mail:927203024@qq.com.

  • 基金资助:
    国家自然科学基金重大国际合作项目(41161140352);国家自然科学基金项目(41261045)

Relationship of man-land of Fengjie County in the center region of the Three Gorges Reservoir Area based on coupling comparison of sloping cultivated lands and settlements

Caihong Gan1,2(), Yangbing Li1,2(), Mengmeng Chen1,2   

  1. 1. College of Geography and Tourism, Chongqing Normal University, Chongqing 400047, China
    2. The Key Laboratory of GIS Application Research, Chongqing Normal University, Chongqing 400047, China
  • Received:2015-01-13 Revised:2015-04-13 Online:2015-08-19 Published:2015-08-08

摘要:

以三峡库区腹地奉节县的27个乡镇为例,应用网格分析技术,以1km×1km网格为单元,揭示了聚落与坡耕地资源之间的配置关系以及不同岩性区聚落-坡耕地耦合模式差异,并对研究区人地关系做了类型划分。结果表明:①奉节县27个乡镇聚落和坡耕地的空间分布表现出较强的空间趋同性,二者用地比、斑块等级大小高值都主要位于北部梅溪河河谷和中部长江河谷地区,低值主要分布于南部石灰岩地区;②坡耕地偏多型主要分布于砂岩区,坡耕地偏少型主要分布于石灰岩区,而坡耕地-聚落均衡型则表现出随机分布格局;③研究区坡耕地大量存在的原因主要归结于坡耕地基数大和坡耕地退耕难度大。受坡耕地分布的影响,坡耕地偏多型的土壤侵蚀较其他耦合类型严重;④27个乡镇人地关系划分为人地矛盾突出型、人地矛盾较突出型、人地矛盾较缓和型和人地矛盾缓和型四种类型,而人地矛盾较突出类型所占比重最大,面临着退耕压力和耕地压力突出的双重问题。

关键词: 坡耕地, 聚落, 空间耦合, 人地协调, 奉节县

Abstract:

Based on the natural background of land bearing capacity difference in the lithology and landform areas, we put forward that in different lithology and landform in the hinterland of the Three Gorges Reservoir Area, because the land bearing capacity is different, then, the interactions, the response and feedback between people and land are different also, further, there is the difference of number and the spatial distribution pattern of settlements from the view of man-land relationship, and showing different process and intensity of ecological degradation, such as soil erosion and so on, so that the diversity and different adaptability of man-land relationship are formed in different lithology and landform areas of Three Gorges Reservoir Area. The coupling relationship between sloping cultivated lands and the settlement is an important factor influencing the suitability of man-land relationship. We took the settlement on behalf of the "people", the sloping cultivated lands and soil erosion on behalf of the "ground" (environment), and chose the 27 towns of Fengjie County located in the center region of the Three Gorges Reservoir Area as the study case, revealed the allocation relationships of between settlements and sloping cultivated lands and the difference of coupled mode between settlements and sloping cultivated lands on different lithology, and made type division of the man-nature of study area applying grid unit analysis technology to divide 1 km x 1 km grid as the research unit. The results showed that: a) The spatial distribution of settlements and sloping cultivated lands presented strong space convergence, the high proportion and the higher patch’s grade of settlements and sloping cultivated lands distribute mainly at the Meixi river valley in the north and the Yangtze river valley in the middle, the low area of them distribute mainly at exposed limestone area of the southern study area. b) Of all the coupling relationship types of sloping cultivated lands and settlements, the type of more sloping cultivated lands distributed mainly at exposed sandstone region and the type of less sloping cultivated lands distributed mainly at exposed limestone region, and the type of which settlements and sloping cultivated lands keep balance present random distribution pattern. c) The reasons of the sloping cultivated lands abound in study area were attributed to the large number of sloping cultivated lands and the difficult to shift from agricultural use. The soil erosion of the coupling type of more sloping cultivated lands is more serious than other coupling type because of the distribution of more sloping cultivated lands. d) The man-land relationship of the 27 towns are divided into four types such as the salient type of contradiction, the less salient type of contradiction, the less assuasive type of contradiction, the assuasive type of contradiction, and the area with less salient region of contradiction between human and land accounted for the largest, therefore, there is facing the dual problems of the cultivated land from grain to green and cultivated land pressure. On the one hand, this research results verify the effectiveness of the theoretical assumptions proposed by this paper and can provides the theory basis for the sloping cultivated lands utilization and the implementation to coordinate man-land relationship in the hinterland of the Three Gorges Reservoir Area, on the other hand, it is also a beneficial attempt and supplement for the study on the regional man-nature relationship.

Key words: sloping cultivated land, settlement, spatial coupling, man-nature harmonization, Fengjie county