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水文数字高程模型在珠江流域入海径流模拟中的应用
郑彬^1,2, 谷德军^1,2, 魏红成^1,3
1.中国气象局广州热带海洋气象研究所;2.中国气象局热带季风重点开放实验室;3.南京信息工程大学

摘要:

为了计算珠江流域入海径流的线源, 引入水文数字高程模型(H-DEM)。利用观测的降水和流域流量订正模型参数, 改造后的模型模拟结果与站点资料对比, 能够基本再现季节变化和年变化, 这表明改造后的H-DEM 可以应用于亚热带地区。采用改造后的模型对珠江流域入海径流进行模拟研究, 结果显示线源和点源都有明显的线性趋势变化和年代际变化特征。

关键词: 数字高程模型径流点源线源珠江流域

DOI：

分类号:

基金项目:广东省科技部计划项目(2007A032600002)

Application of a hydrological digital elevation model on the Zhujiang River basin for freshwater discharge into the South China Sea

Abstract:

To calculate the line source of runoff in the Zhujiang River drainage area, a hydrological digital elevation model (H-DEM) was introduced. With modified parameters of observed rainfall and basin runoff, the improved H-DEM could well reproduce the seasonal and annual variations in comparison to the observed data. The improved H-DEM can be used in the subtropics. The simulations on freshwater discharged into the South China Sea in the Zhujiang River basin by the improved model show significant interannual and interdecadal variations both in the point and line sources.

Key words: digital elevation model runoff point source line source the Zhujiang River basin

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