区域生态质量变化对土地利用类型转换的响应——以重庆市沙坪坝区为例  

Response of the Change in Regional Ecological Quality to Land Use Type Conversion——A Case study in Shapingba District of Chongqing City

作　　者：王利平[1] 王成[1,2] 李晓庆[1] 雷田 

机构地区：[1]西南大学地理科学学院,重庆400715 [2]重庆大学城规建筑学院,重庆400030 [3]重庆市铜梁县市政局,重庆402560

出　　处：《西南大学学报（自然科学版）》2012年第7期88-94,共7页Journal of Southwest University(Natural Science Edition)

基　　金：教育部人文社科青年项目(10YJCZH147)

摘　　要：研究基于2000-2008年沙坪坝区土地利用变化的时空特征分析,通过赋予土地利用类型对应的相对生态价值,识别区域生态质量变化对土地利用类型转换的响应方向与程度,旨在判断区域生态质量的总体变化状况.结果表明,2000-2008年间,研究区土地利用类型间转换的时空分异特征明显,且对生态质量变化的贡献程度不一:水田转换为建设用地对生态质量恶化的贡献率最高(24.44%),主要发生于沙坪坝区中南部的槽谷地带;旱地转换为林地对区域生态质量改善的贡献率最高(31.81%),集中在缙云山及歌乐山山体两侧坡度较陡的区域.区域总体生态质量未因土地利用类型转换而降低,反而有所改善,其土地利用方式趋向合理.The study is based on an analysis of the spatial-temporal characteristics of land use conversion in Shapingba district from 2000 to 2009. Via endowing different land use types with relevant ecological values and quantifying the improvement or deterioration degree of the contribution rates from land use type conversions to regional ecological quality, the paper makes an assessment of the overall ecological quality changes in Shapingba district in this period. Several significant points are revealed in the study. First, the extent and spatial distribution properties of the conversions between different land use types are quite obvious and the contribution rates of different land use type conversions vary in their influence upon the ecological quality. Second, the conversion of paddy land to construction land, which is mainly distributed over the steep area of the two sides of the Jinyun Mountains and the Gele Mountains, contributes most to the deterioration of ecological quality with a contribution rate of 24.44%. In contrast, the conversion of dry land to woodland, which primarily covers the middle south of the valley between the Jinyun Mountains and the Gele Mountains, is the dominant factor of ecological quality improvement with a contribution rate of 31.81%. Overall, although the types of land use are changed, the ecological quality has not been worsened. Instead, it is improved, and the ways of land use are prone to be rationalized.

关 键 词：生态质量 土地利用类型转换 响应 贡献率 沙坪坝区 

分 类 号：F301[经济管理—产业经济]