摘要
南四湖是南水北调东线工程的重要输水储蓄枢纽,监测其水体面积变化可服务于当地环境保护治理和合理开发利用。收集南四湖地区2006-2020年的Landsat遥感影像数据,利用新型水体指数(NWI)方法进行水体面积的提取,与Sentinal-2数据的计算结果进行对比验证,对年际、年内变化规律及影响因素进行分析。分析表明:2006-2015年南四湖水体面积年均减少33.854 km2,2015-2020年年均增长14.488 km2;受南水北调东线一期工程影响,降雨只在2013年以前对年内水体面积的影响较为显著。15年间南四湖水体面积呈现先减少后增加的趋势,水域生态环境得到好转。
Monitoring the water change of Nansihu,an important water conveyance and storage hub for the east route of South-to-North Wa⁃ter Diversion Project,can serve for local environmental protection and management and rational development and utilization.This paper col⁃lects Landsat data of Nansihu from 2006 to 2020 and utilizes New Water Index(NWI)to extract the water area for Analysis of the interannual and interannual variation rules and influencing factors.The results are validated against Sentinal-2 data.The annual average water area of Nansihu Lake decreased by 33.854 km2 from 2006 to 2015,and increased by 14.488 km2 from 2015 to 2020.Under the influence of artificial water diversion,rainfall only had a significant influence on the water area of the year before 2013.From 2006 to 2015,the water area of Nan⁃sihu Lake decreased first and then increased,showing an improvement of local ecological environment.
作者
周石
李英冰
ZHOU Shi;LI Ying-bing(School of Geodesy and Geomatics,Wuhan University,Wuhan 430072,Hubei Province,China)
出处
《中国农村水利水电》
北大核心
2021年第9期38-43,47,共7页
China Rural Water and Hydropower
基金
国家重点研发项目计划项目(2018YFC0807000)。
