城市扩展下的重庆都市区NDMI响应特征研究  

Study on Response Characteristics of NDMI by the Urban Expansion in Chongqing Metropolitan Area

作　　者：陈丹[1] 王福海[1] 

机构地区：[1]重庆工商大学融智学院,重庆400033

出　　处：《土壤通报》2015年第5期1071-1079,共9页Chinese Journal of Soil Science

基　　金：国家社科基金重大项目(11&ZD161);重庆工商大学研究生"创新型科研项目"(yjscxx2014-052-29)共同资助

摘　　要：城市扩展伴随着生态系统的变化,归一化水汽指数(NDMI)是监测区域旱情程度的重要指标之一,研究城市扩展进程中NDMI的响应特征具重要价值和意义。采用重庆都市区1988~2010年多光谱TM遥感数据,利用分布指数、转移矩阵、重心迁移模型等研究方法,将图谱分析与城市扩展规模影响程度相结合,研究城市扩展与NDMI响应关系。研究结果表明:城市扩展与NDMI空间分布特征呈现出明显相关性;随着城市建设用地扩展,1级、2级、3级NDMI时空响应最为活跃;重庆都市区环境治理理念已从事后修复逐步提升到事前防御;对于建成区域内的环境修复应从1级NDMI分布区域入手。研究结论旨在为重庆环境监测相关部门和城市规划建设选址提供参考和依据。Urban expansion accompanie d with the change of ecosystem and environmental quality. Normalized Difference Moisture Index(NDMI) was one of the important indices to monitor the degree of regional drought. During the process of urban expansion, NDMI existed a timely response relationship. This paper collected the TM remote sensing image data from 1988 to 2010 in Chongqing metropolitan area. The construction land spatial data and NDMI spatial distribution data in Chongqing metropolitan area were analyzed based on the GIS and RS technology.Distribution index, transfer matrix, the change of gravity center and other methods were used to study the NDMI response characteristics under the urban expansion. Results showed that there was obvious correlation between urban expansion and spatial distribution characteristic of NDMI. With the expansion of urban construction, the spatial distribution characteristic of the first, the second and the third NDMI were more active. The environment treatment idea of Chongqing metropolis gradually promoted from afterwards repairing to beforehand defense. The environmental remediation of the built area should be started from the distribution area of the first NDMI. The environment protection of the thirst NDMI distribution area should be paid attention in the new built area as well. All the results would provide the references and basis for environmental monitoring of related departments and the construction location of urban planning in Chongqing and also provide idea and method for the research response characteristics of other terrestrial parameters by the urban expansion in the study area.

关 键 词：城市扩展 NDMI 响应机理 分布指数 图谱分析 重庆都市区 

分 类 号：P426[天文地球—大气科学及气象学] P461