水位库容曲线的卫星影像测定方法研究

Research on determination method of reservoir level-capacity curve by satellite imagine

水位库容曲线是水库运行管理的重要依据,由实地库区地形测量获得水位库容曲线的传统方法工作量大、限制条件多,对众多中小型水库来说,难以大量推广。以桐仁桥小水库为例,应用我国资源卫星影像资料,提取不同水位时的水库水面面积,结合实际水位记录数据,建立了水位-面积函数关系,运用积分方法推导了水位库容曲线。采用水量平衡法对推算结果进行了验证,并用数理统计法进行了精度分析。研究结果表明,运用卫星影像推求库容曲线的方法快捷、实用、精度可靠,具有很好的实际应用价值。

Reservoir level - capacity curve is an important basis for reservoir＇s operation and management. The traditional determination method for level - capacity curve by field measurement in a reservoir area is characterized by large workload, multiple limitations, and it is difficult to be extensively promoted for a large number of middle and small reservoirs. In this paper, taking Tongrenqiao Reservoir as an example, firstly, the water surface area of the reservoir was abstracted using the imagines of resource satellite of China and the function relation of reservoir water level - surface area was established in combination of measured water level data; and then, the reservoir level- capacity curve was obtained by integration method. The obtained reservoir level- capacity curve was verified by water balance method and the accuracy was analyzed by mathematical statistics method. The research results show that the determination of reservoir level - capacity curve by satellite imagines is quick, applicable, reliable and is worth to promotion and application.