龙川江流域年径流特性的地区综合法分析

Analysis on annual runoff characteristics of Longchuan River Watershed using regional synthesis

针对龙川江流域水文资料短缺的实际问题,使用地区综合法进行径流的分析与计算,并充分利用现有降水径流资料进行3种方案的综合比较。通过成果检验,选定既考虑了下垫面因素,又考虑降水因子的方案3作为分析该区域的最终综合方法,并应用于无资料地区的拟建工程点。结果表明,通过多方案的综合比较,将利用最终选定方案推求出的径流成果与设立水文专用站后的实测资料相比,其精度达到了较高水平。

As for the lack of measured hydrological data in Longchuan River Watershed,we adopt regional synthesis to calculate and analyze the runoff of the watershed and fully consider 3 calculation schemes using the limited available rainfall data.Through result checking,we select scheme 3 that takes account of underlying surface and rainfall as the final method to analyze the runoff in this region.The scheme 3 is applied in the ungauged area where hydropower projects are planned.It is shown that by comprehensive comparison of the 3 schemes,the runoff calculated by the selected scheme in the ungauged area has high precision comparing with the data measured after establishment of a specific hydrological station.