摘要
通过人工模拟降雨试验,研究不同覆盖措施对坡面土壤侵蚀的影响。试验表土堆置体坡度比为1∶1.5,进行3种覆盖措施(未处理、覆盖土工网和种植白三叶草(Trifolium repens L.))处理,设计0.5,1.0,1.5mm/min 3种雨强,对比分析不同降雨强度条件下表土堆置体不同覆盖措施处理后坡面的径流和产沙规律,并定量研究覆盖土工网与种植白三叶草在减少坡面径流和侵蚀产沙中的效益。结果表明:在不同降雨强度条件下,3种覆盖措施对坡面侵蚀影响显著,未处理的试验坡面产生的径流量和含沙量最高,覆盖土工网次之,种植白三叶草最低。整个试验过程中覆盖土工网减流效益为50%,种植三叶草的减流效益更显著,达82%以上;而二者的减沙效益均在94%以上。总体来说,覆盖土工网和种植白三叶草均可控制雨水对坡面土壤的侵蚀,具有较好的减流、减沙效益,且种植白三叶草的作用更显著。
In order to reveal the effect of different coverage measures on the slope erosion of topsoil-bank,the simulated rainfall experiments were conducted in this study.Three coverage measure treatments,which were non-coverage（CK）,geonet-coverage and plant-coverage,were set on the topsoil-bank.The slope ratio of topsoil-bank was 1∶1.5 and the plant used in this study was Trifolium repens L.The rainfall intensities were 0.5,1.0,1.5 mm/min,respectively.The runoff and sediment yield law of the slope surface with the different coverage measures under the different rainfall intensities were studied.The results showed that the coverage measures had significant effects on slope erosion compared to CK under different rainfall intensities.The most runoff and sediment were produced in CK,followed by the geonet-coverage,and the least was plant-coverage.During the whole experiment,compared to CK,the geonet-coverage decreased the runoff by about 50%,while plant-coverage gave a more remarkable decrease（82%）.Both geonet-coverage and plantcoverage treatments reduced sediment by more than 94%.In conclusion,coverage measures could inhibit the erosion of rain on the slope,and help reduce the runoff and sediment,among which the plant-coverage had a better role than geonet-coverage.
作者
邓从
陈为峰
王文中
刘志全
胡琴
DENG Cong;CHENG Weifeng;WANG Wenzhong;LIU Zhiquan;HU Qin(College of Resource and Environment, Shandong Agricultural University, Taian , Shandong 271000;Shandong Province Center for Land Comprehensive Improvement and Service, Jinan 250014)
出处
《水土保持学报》
CSCD
北大核心
2018年第2期92-96,共5页
Journal of Soil and Water Conservation
基金
山东省重点产业关键技术项目(2016CYJS05A02)
山东省财政厅
国土厅项目(2016320016)
关键词
表土堆置体
覆盖措施
降雨强度
流失特征
topsoil bank
surface treatment
rainfall intensity
characteristics of loss
