Study of Dongting Lake area variation and its influence on water level using MODIS data / Etude de la variation de la surface du Lac Dongting et de son influence sur le niveau d’eau, grâce à des données MODIS
Study of Dongting Lake area variation and its influence on water level using MODIS data / Etude de la variation de la surface du Lac Dongting et de son influence sur le niveau d’eau, grâce à des données MODIS
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DOI：
10.1623/hysj.50.1.31.56327
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发表时间：
2005-02
影响因子：
3.5
通讯作者：
Dingzhi Peng;L. Xiong;Shenglian Guo;Ning Shu
中科院分区：
文献类型：
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作者：
Dingzhi Peng;L. Xiong;Shenglian Guo;Ning Shu
摘要摘要中分辨率成像光谱仪（MODIS）是新一代遥感传感器，其在水文水资源领域的应用已引起人们的广泛关注。针对我国传统遥感技术在洪涝灾害监测中存在的响应速度慢等问题，设计了基于MODIS和GIS的洪涝灾害监测与评估系统（FDMAS），并将其应用于湖南省洞庭湖。利用1：10 000地形图资料，得到了1995年洞庭湖蓄水量曲线，进而推导出城陵矶水位与湖区面积的关系。通过对2002年4月至2003年4月洞庭湖的MODIS影像进行处理，得到了洞庭湖水位与湖面面积的新关系，并结合1996年的洪水资料分析了湖面变化对水位的影响。用2002年的面积曲线代替原湖泊面积曲线，1996年洪水水位下降0.64 m。这表明，自1998年中国中央政府实施退耕还湖政策以来，由于洞庭湖面积的增加，洪水水位已大大降低。
Abstract Abstract MODerate-resolution Imaging Spectroradiometer (MODIS) is a new generation remote sensing (RS) sensor and its applications in hydrology and water resources have attracted much attention. To overcome the problems of slow response in flood disaster monitoring based on traditional RS techniques in China, the Flood Disaster Monitoring and Assessing System (FDMAS), based on MODIS and a Geographic Information System (GIS), was designed and applied to Dongting Lake, Hunan Province, China. The storage curve of Dongting Lake for 1995 was obtained using 1:10 000 topographic map data and then a relationship between water level at the Chenglingji hydrological station and lake area was derived. A new relationship between water level and lake area was obtained by processing MODIS images of Dongting Lake from April 2002 to April 2003 and the influence of lake area variation on water level was analysed with the 1996 flood data. It was found that the water level reduction reached 0.64 m for the 1996 flood if the original lake area curve was replaced with the area curve of 2002. This illustrates that the flood water level has been considerably reduced as a result of the increased area of Dongting Lake since the Chinese Central Government’s ȁreturn land to lakeȁ policy took effect in 1998.