水利水电技术2017，Vol.48Issue(9)：77-83,7.DOI:10.13928/j.cnki.wrahe.2017.09.012
基于Landsat及ICESat和Hydroweb的太湖容积变化监测
ICESat/Hydroweb and Landsat data-based monitoring on volume variation of Taihu Lake
摘要
Abstract
In order to obtain the long-term dynamic variation process of Taihu Lake and in accordance with the Landsat data from 1975 to 2015,the surface area of the lake is extracted based on the methods of the Normalized Difference Water Index (NDWI) and the Modified Normalized Difference Water Index (MNDWI),while the water level of the lake is extracted according to the ICESat and Hydroweb data.By integrating both of them,the volume variation and the water balance data of the lake is obtained.On the basis of this,the water level,the surface area and the volume variation laws and trends are analyzed,and then their impacting factors are studied as well.The result shows that the variations of both the surface area and the volume of Taihu Lake in recent 40 years exhibit the trends of slow increases from 2 320.07 km2 and-0.047 0 km3 in 1975 to 2 341.06 km2 and 0.275 9 km3 in 2015 respectively with unobvious increasing trends,while the water level of the lake is generally presents a variation trend of fluctuation from 0.982 6 m in 1975 to 1.135 9 m in 2015.Therefore,a moderate correlation (R2 ≈0.65)is there between the water level and the surface area,meanwhile,a higher correlation (R2 ＞ 0.85) is there between the volume variation and the variations of both the surface area and the water level.The water balance of Taihu Lake is positive with less variation,which is 0.009 2 km3.The increase of the inflow water amount,the variations of the annual precipitation and the annual evaporation as well as the policy of returning land to lake are the main factors to cause the variation of Taihu Lake.关键词
太湖/湖面面积/湖泊水位/湖泊容积变化/水量平衡Key words
Taihu Lake/lake surface area/lake water level/lake volume variation/water balance分类
测绘与仪器引用本文复制引用
岳辉,刘英..基于Landsat及ICESat和Hydroweb的太湖容积变化监测[J].水利水电技术,2017,48(9):77-83,7.基金项目
国家自然科学基金青年科学基金(41401496),中国博士后科学基金(2016M592815) （41401496）
