| 摘要: |
| 通过室内模拟试验与理论分析,探究4种不同土壤初始含水率条件下深层坑渗灌土壤水分运动规律。结果表明:初始含水率对入渗特性有显著影响。相同入渗时间,初始含水率越大,累积入渗量越小,入渗率也越小;而湿润锋运移距离随初始含水率的增大而增加;初始含水率越大,湿润体也越大,且相同位置的含水率也越大。建立了改进的Kostiakov入渗模型,以及初始含水率与湿润锋运移距离的幂函数关系,对所建模型进行验证,精度较高。 |
| 关键词: 土壤初始含水率 深层坑渗灌 入渗 湿润锋 |
| DOI：10.11841/j.issn.1007-4333.2013.05.07 |
| 投稿时间：2012-11-22 |
| 基金项目:国家科技支撑项目(2007BAD38B03); 新疆自治区重大专项(200731136-5) |
|
| The impact of initial soil water content on infiltration properties of deep pit infiltration irrigation |
|
ZHANG Jian-feng1, TIE Xi-ning1, YANG Xiao2, WANG Rui1, LIU Jing1, ZHANG Tian-fu1
|
| (1.Institute of Water Resources, Xi'an University of Technology, Xi'an 710048, China;2.Shaanxi Water Engineering Reconnaissance Design Research Institute, Xi'an 710003, China) |
| Abstract: |
| This paper explored soil water movement rules under 4 different kinds of initial soil water content through indoor simulation and theoretical analysis.Test showed that the initial soil water content had a significant impact on infiltration characteristics.In the same infiltration time,the greater the initial moisture content was,the smaller the amount of cumulative infiltration,and the smaller the infiltration rate.The wetting front migration distance increased with the initial moisture content increases.The greater the initial moisture content was,the larger the moist body,and the larger the moisture content in the same position.The improved Kostiakov infiltration model,the power function of the distance of initial moisture content and wetting front were established.The verification showed the model had high precision. |
| Key words: initial soil water content deep pit infiltration irrigation infiltration wetting front |
