摘要
在RS/GIS的支持下,采用地形图扫描矢量化法构建涨渡湖区域的数字高程模型(DEM),将DEM模型与涨渡湖区2003年的LANDSAT 7 TM遥感图像进行叠加分析,提取出不同湿地类型的平均高程。通过回归分析,建立起水位、淹没面积、容积的关系模型。结合试验区的农情状况和水利设施的排涝能力,对比分析出通江前后涨渡湖地区调蓄能力的变化:通江前湖区最大调蓄面积为38.75 km2,最大调蓄容量为1.644亿m3;通江后其最大可淹没面积为273 km2, 最大可调蓄容量为9亿m3。
The DEM model of Zhangdu Lake region is set up by means of topographic map scan supported by geographical information system. Using RS and GIS technology, DEM model was overlaid with the LANDSAT7 TM image, average elevation of different wetland was drawn out. By carrying on statistical analysis to the data, the relation models of the water level and area, the water level and volume, and area and volume is computed. Combining with the agriculture condition and the ability of draining flood of water conservancy projects, the authors simulate in quantity the difference of storage capacity in Zhangdu Lake region before and after connecting to Yangtze River. In Zhangdu Lake region, the largest storage capacity is 1.644×10 8m 3 and the water area is 38.75 km 2 before connecting to Yangtze River, however, after connecting to Yangtze River, the largest storage capacity is 9×10 8m 3 and the water area is 2.73 ×10 8m 2.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2005年第3期351-355,共5页
Journal of Jilin University：Earth Science Edition
基金
国家自然科学基金项目(40271119)
国家"973"项目(2003CB415201)
中国科学院知识创新工程(KSCX2SW 110)
关键词
涨渡湖地区
数字高程模型
调蓄能力
模拟分析
Zhangdu Lake region
digital elevation models
storage capacity
simulation analysis
