近30年秦淮河流域水面变化及其驱动因素分析

发布时间：2019-07-18 08:29

【摘要】：针对秦淮河流域城市化水文效应对水文水资源影响,分析秦淮河流域和城市区水面时空变化及其驱动因素,选取流域1985—2015年49景Landsat影像,采用基于K均值聚类水体指数法对比分析水体指数的性能。在探讨水面率与降雨量、温度、流量关系基础上,从自然和人为因素2方面分析水面变化的主要驱动因素。结果表明,流域水面率在2.42%(62.69km~2)~5.05%(130.56km~2)变化,水面增加了8.48km~2,增长8.12%;城市区水面率在2.76%(8.63km~2)~6.63%(20.73km~2)变化,水面减少了6.60km~2,缩减43.15%;流域年降雨量与流量变化态势相同,可知降雨量对水面贡献较小;1988—2015年转移矩阵表明,流域32.34%水面转为耕地,城市区27.90%和20.52%水面转为建设用地与耕地,其他地类转换为水面比重较小;人为因素是水面变化的主要驱动因素。本文对研究城市化水文效应具有一定的理论和实际意义。
[Abstract]:In view of the influence of urbanization hydrological effect on hydrological and water resources in Qinhuai River Basin, the temporal and spatial variation and driving factors of water surface in Qinhuai River Basin and urban area are analyzed. 49 Landsat images of Qinhuai River Basin from 1985 to 2015 are selected, and the performance of water body index is compared and analyzed by K-means clustering water index method. On the basis of discussing the relationship between water surface rate and rainfall, temperature and flow rate, the main driving factors of water surface change are analyzed from two aspects of natural and human factors. The results show that when the water surface rate of the basin varies from 2.42% (62.69km~2) to 5.05% (130.56km~2), the water surface increases by 8.48 km 鈮，

本文编号：2515759