蓄水坑灌降雨径流的产汇流特性研究

蓄水坑灌法是一种具有水土保持作用的山丘区果林灌溉新方法。根据蓄水坑灌法田间工程的特点,分析了在蓄水坑灌条件下的产汇流特性;在此基础上对单棵果树控制面积内的径流过程、初损历时、径流量及径流系数进行了分析推导,建立了相应的计算模型,并以设计算例说明了计算模型的应用。此项研究对于在一定的水土流失防治标准下设计蓄水坑灌的田间工程具有重要的价值。

Study on Characteristic of Runoff Producing Rain and Sink Flow in Pit Irrigation

Pit irrigation is a new method that can check soil erosion suitable for fruit tree and forest in gully and hilly. According to the specific of pit irrigation field engineering, the characteristic of runoff producing rain and sink flow in pit irrigation were analyzed. Based on this, the runoff process, initial abstraction time, runoff amount and runoff coefficient in a fruit tree control areas were analyzed and deduced; meanwhile,corresponding theoretical models were worked out; an example of models application was illustrated. This study will have an important value for design on field engineering of pit irrigation under some soil and water conservation standard condition.