| Rainfall infiltration simulation and numerical computation at different landuse on the loessial hillslope |
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| DOI：10.7606/j.issn.1000-7601.2008.05.25 |
| Key Words: rainfall infiltration modified Green-Ampt model numerical method landuse |
| Author Name | Affiliation | | LI Binbing | 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 | | ZHENG Fenli | 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 in filtration 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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