水土保持学报2018，Vol.32Issue(2)：74-79,6.DOI:10.13870/j.cnki.stbcxb.2018.02.011
黄丘区野外草被坡面土壤入渗参数变化规律与模拟研究
Study on the Change and Simulation of Soil Infiltration Parameters on the Field Grass Slope in the Loess Hilly Region
摘要
Abstract
Effects of grass coverage degree (30％,60％,90％) and rainfall intensity (1,1.5,2,2.5,3 mm/ min) on the soil infiltration process on the 15° grass slope were studied under simulated rainfall condition in the third subregion of loess hilly region.The results were as follows:(1)Soil infiltration rate increased with the increase of grass cover and rainfall intensity,while the soil infiltration rate increased significantly with the increase of grass coverage rate.The initial infiltration rate of soil and rainfall intensity presented exponential relationship.The soil stability infiltration rate and rainfall intensity showed the power function relations.(2)The cumulative soil infiltration and rainfall time had a good power function relationship.The cumulative infiltration of soil increased significantly with the increase of grass coverage rate.The effect of rainfall intensity on soil cumulative infiltration showed phase-based difference.(3) The increase of grass cover could significantly increase the soil infiltration coefficient,the soil infiltration coefficient decreased with the increase of rain intensity.Under the coverage of field grass (about 60％),the effective rainfall intensity of grass cover in increasing soil infiltration coefficient was between 1 ～ 1.5 mm/min.(4) The relationship between soil infiltration rate and rainfall time was fitted by four infiltration models,and the Horton formula was found could well simulate the soil infiltration process.关键词
黄丘区/降雨强度/草被覆盖度/土壤入渗Key words
loess hilly region/rainfall intensity/grass cover/soil infiltration分类
农业科技引用本文复制引用
何子淼,肖培青,郝仕龙,杨春霞..黄丘区野外草被坡面土壤入渗参数变化规律与模拟研究[J].水土保持学报,2018,32(2):74-79,6.基金项目
国家自然科学基金项目(41571276,41701326) （41571276,41701326）
中央级公益性科研院所基本科研业务费专项(HKY-JBYW-2016-33) （HKY-JBYW-2016-33）
