广西岩溶峰丛流域雨洪产流系统模型_以奇庚江范团以上流域为例

本文在考虑广西岩溶峰丛流域产流物理机制和主要特点的基础上,建立了一个岩溶峰丛流域雨洪产流的系统模型.模型中用产流系统→子系统→单元的嵌套系统结构,照顾了岩溶峰丛流域不闭合的特性以及产流损失无上限的特性,用产流损失需水概念推出e指数型产流计算公式及各参量计算方法.本文还通过个例计算,检验模型应用效果;通过不同方案计算成果对比表明,本模型的计算合格率有较明显提高.

A SYSTEM MODEL OF FLOOD RUNOFF GENERATION FROM KARST PEAK CRUSTER BASINS IN GUANGXI--WITH FANTUAN BASIN OF QIGENG .AS AN EXAMPLE

A system model of flood runoff generation from Karst peak cruster basins in Guangxi is produced by the author. In this model, which is based on the physical mechanism and the main features of runoff formation from the basins, a runoff generation system-subsystem-unit hierarchal structure is built to illustrate the complicated features of the underlying surface in Karst peak cruster basins. The runoff yield formula in exponential pattern is derived, in accordance with the features of unclosed watershed and of unlimited runoff generation loss, from the concept of runoff generation losses, and the methods to determine the parameters in the formula are also found. In addition, the author used concrete examples to examine the applied effect of the system model and compared it with other models. Results show that the system described in the paper obtains higher precision than the others.