摘要
地表最大湿润距离R(t)和垂向最大入渗深度H(t)是地表滴灌系统设计的基础,由于垂向最大入渗深度H(t)不易观测,因此如何合理地确定H(t)是滴灌应用中需要解决的关键问题之一。对烟台棕壤土地表点源、线源入渗进行了室内试验研究,提出了基于地表水平湿润距离的地表滴灌垂向湿润锋的估算模式。模拟值和实测值的对比表明,本模式的估算精度较高,入渗过程中的最大相对误差不到5%。
The surface horizontal wetting front and vertical wetting front are base of drip irrigation system design. Because of vertical wetting front is difficult to observe, it is a key issue to make sure the depth of vertical wetting front in drip irrigation. Based on the experiment results of Yan-tai soil, the estimation model of vertical wetting front based on surface visual horizontal wetting front is put forward. The compare between simulation and observation show that the precision of the estimation model is high with the highest relative error less than 5%.
出处
《灌溉排水学报》
CSCD
北大核心
2006年第1期10-13,共4页
Journal of Irrigation and Drainage
基金
国家自然科学基金资助项目(50479051)
烟台师范学院校基金资助项目(000444
043201)
关键词
点源入渗
线源入渗
平均含水率增量
垂直湿润锋估算模型
point source infiltration
line source infiltration
average water content increment
estimation model of vertical wetting front
作者简介
张振华（1971-），河北藁城人，教授，博士，硕士生导师，主要从事区域水土资源高效利用研究．
