基于归一化差异水体指数的水体面积变化监测  

Monitoring of Water Area Changes Based on the Normalized Difference Water Index

作　　者：熊珂 常云鹏 关键 XIONG Ke;CHANG Yunpeng;GUAN Jian(Hunan Provincial Center for Forestry Resources Surveying,Monitoring and Evaluating,Changsha 410004,Hunan,China;Research Center of Forestry Sensing&Information Engineering,Central South University of Forestry&Technology,Changsha 410004,Hunan,China;Hunan Prospecting Designing and Research General Institute for Agriculture Forestry and Industry Co.,Ltd.,Changsha 410007,Hunan,China)

机构地区：[1]湖南省林业资源调查监测评价中心,湖南长沙410004 [2]中南林业科技大学林业遥感信息工程研究中心,湖南长沙410004 [3]湖南省农林工业勘察设计研究院有限公司,湖南长沙410007

出　　处：《中南林业调查规划》2024年第2期54-57,共4页Central South Forest Inventory and Planning

基　　金：湖南省自然科学基金“环洞庭湖湿地碳储量时空演变与模拟”(2022JJ40873)

摘　　要：以东洞庭湖为研究区域,利用2022年Terra/MODIS卫星数据,结合水体指数法,对东洞庭湖2022年水体面积变化进行监测,通过比较EWI、NDWI、MNDWI三种水体指数精度,选取最适合研究区域的水体指数。研究结果表明:Terra/MODIS卫星数据在中尺度水体面积提取方面具有较好效果。②EWI、NDWI和MNDWI三种水体指数中,NDWI表现最好,NDWI的总体精度和Kappa系数最高。③2022年东洞庭湖水体面积在5-7月期间较大,其他月份较小。其中,3月初水体面积最小,为15392hm^(2);6月初水体面积最大,达到了99745hm^(2)。Based on Terra/MODIS satellite data from January to December 2022,the water area of East Dongting Lake was calculated,and the accuracy of EWI,NDWI,and MNDWI,three water indices,were compared.The results showed that:(1)Terra/MODIS satellite data had good effects in extracting water area on the mesoscale.(2)Among the three water indices of EWI,NDWI,and MNDWI,NDWI performed the best in water extraction,with the highest accuracy and Kappa coefficient.(3)In 2022,the water area of East Dongting Lake exhibited a characteristic of being small at both ends and large in the middle,which meant that it was larger from May to July and smaller in other months.Specifically,the water area was the smallest at the beginning of March,reaching 15392 hm^(2),while it was the largest at the beginning of June,reaching 99745 hm^(2).

关 键 词：遥感 Terra/MODIS数据 NDWI 动态监测 洞庭湖 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]