摘要
黄麻土工布可灵活地覆盖并附着于土壤表面，有效地减小雨滴溅蚀，拦截坡面水流，控制土粒移动。试验结果表明：在１次降雨量为２０～３８ｍｍ时，覆盖黄麻土工布可减少５．０９Ｌ／ｍ２的径流量，在１次降雨量１０～３８ｍｍ，盖布可减少８４．９％～９８．４０％的产沙量。人工降雨条件下，盖布可推迟产流时间３～６ｍｉｎ，不同处理的累积径流量、产沙量与时间均呈显著的线性相关，盖布与光板地的曲线斜率相差很大，光板地小区的累积产沙量与时间的曲线斜率为盖布小区的４１２．７９倍。同时，覆盖黄麻土工布还可提高土壤中小于０．００２ｍｍ的颗粒比例，增加土壤团聚度，并有提高土壤抗剪强度的趋势。
Jute geotextiles (geojute) may flexsibly be used to cover and cohere to the soil surface. It can effectively reduce raindrop splash, intercept slope runoff and control soil particles to move. The test results show that, when an individual rainfall is 20-38mm, the area covered by geojute can reduce runoff 5.09L/m 2 ; when an individual rainfall is 10-38mm, the sediment yield can also be reduced by 84.9% - 98.4% . Under the rainmaking, the geojute may put off the producing runoff time 3-6min; the relations between cumulation runoff or sediment yield and the time present linear correlation obviously; the curve slope of the cumulation sediment yield versus time on the bare plot is 412.79 times that of the plot covered by geojute. Meantime, the covered plot by geojute can increase the ratios of less than 0.002 mm particle sizes in the soil, improve the soil aggregation and has the trend of increasing soil resistance shear strength.
出处
《长江科学院院报》
EI
CSCD
北大核心
1998年第5期31-34,44,共5页
Journal of Changjiang River Scientific Research Institute
基金
国家自然科学基金
关键词
黄麻土工布
覆盖
土壤抗蚀性
jute geotextiles (geojute)
coverage
soil anti erodibility
