| 黄土坡面不同土地利用下的降雨入渗模拟与数值计算 |
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| 引用本文： | 李斌兵,郑粉莉.黄土坡面不同土地利用下的降雨入渗模拟与数值计算[J].干旱地区农业研究,2008,26(5):118-123. |
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| 作者姓名： | 李斌兵 郑粉莉 |
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| 作者单位： | 陕西师范大学旅游与环境学院,陕西,西安,715600;武警工程学院,陕西,西安,710086;西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西,杨凌,712100 |
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| 基金项目： | 中国科学院西部行动计划(二期)，国家重点基础研究发展计划(973计划)，西北农林科技大学校科研和教改项目 |
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| 摘 要： | 本文基于修正的Green-Ampt方程,给出了改进的Green-Ampt模型在黄土坡面变雨强条件下入渗过程方程与数值求解的算法,结合黄土高原纸坊沟小流域实测土壤数据,借助计算教学和计算机编程,建立了变雨强降雨入渗过程软件系统,从软件系统运行结果中分析了坡耕地、草地和林地的入渗量和入渗率变化情况,以及土壤初始含水率和饱和导水率对草地和林地入渗的影响.结果表明:相同降雨情况下,林地入渗量是草地的2倍,是农地的3倍;不同土地利用下土壤入渗率变化与入渗量类同;草地入渗率对土壤初始含水率变化比较敏感,林地入渗率对土壤饱和导水率变化比较敏感.
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| 关 键 词： | 降雨入渗 改进Gteen-Ampt模型 数值计算 土地利用 |
Rainfall infiltration simulation and numerical computation at different landuse on the loessial hillslope |
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| LI Binbing,ZHENG Fenli.Rainfall infiltration simulation and numerical computation at different landuse on the loessial hillslope[J].Agricultural Research in the Arid Areas,2008,26(5):118-123. |
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| Authors: | LI Binbing ZHENG Fenli |
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| Institution: | College of Tourism and Environmental Science, Shaanxi Normal University, Xi''an, Shaanxi 710062, China; Collage of Armed Police Forces of Engineering, Xi''an, Shaanxi 710086, China; College of Resources and Environment, Northwest A & F University, Yangling, Shannxi 712100, China |
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| Abstract: | Based on modified Green-Ampt equations,infiltration process equation and numerical calculation method under variable rainfall intensity were given;and combining field soil data on Zhifanggou watershed and through computer language,the software system under unstable rainfall infiltration was developed.According to the software run results,analysis was also made of cumulative infiltration and infiltration rate under different forestland,grassland,and cropland as well as effects of initial soil water content and saturated hydraulic conductivity on infiltration at different landuse.The results showed that the cumulative infiltration in forestland was 2 times greater than that in grassland and 3 times in cropland.The infiltration rate in forestland was larger than that in grassland and cropland.Meanwhile,the effect of initial soil moisture content on infiltration rate in grassland was sensitive,and impacts of soil saturated hydraulic conductivity on infiltration rate in forestland was sensitive too. |
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| Keywords: | rainfall infiltration modified Green-Ampt model numerical method landuse |
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