摘要
提出了双抛物线型土壤蓄水容量关系曲线,对新安江模型产流计算公式进行了改进。利用珠江三角洲不同土壤水分状态的多年水文资料,对改进前和改进后新安江模型产流计算公式进行了比较。结果表明,双抛物线型关系曲线能够代表流域中多种土壤水分状态并存的情况,包括湿润、干燥以及从湿润到干燥过渡阶段,而原单抛线型的模型则是双抛物线的一个特例,只能反映单一土壤水分状态的分布。对于那些发生在湿润季节的暴雨,两种曲线的模拟精度相当,但对于发生在旱季及旱湿过渡时期的暴雨,双抛物线明显优于单抛物线。
The single parabolic curve describing the distribution of soil moisture storage capacity is substituted by double parabolic curve to promote the widely used Xinanjiang model for runoff calculation. The validity of this model is verified by the hydrological data derived from Pearl River Delta with different soil moisture. It is found that the double parabolic curve relationship well describes the moisture state of soil in spite of the soil is dry or wet. The single parabolic curve is only a special case corresponding to a specific state of soil moisture distribution.
出处
《水利学报》
EI
CSCD
北大核心
2002年第12期38-43,共6页
Journal of Hydraulic Engineering
关键词
双抛物线型
土壤
蓄水容量
曲线
产流
抛物线函数
Xinanjiang runoff calculation model
non-uniformity of soil moisture
probability distribution curve
parabolic function
