降雨强度对缓坡农田径流和氮损失的影响研究  

Effect of Rainfall Intensity on Runoff and Nitrogen Loss on Gentle Slope Farmland

作　　者：吴淑丹 Wu Shudan(Jiangxi Academy of Water Science and Engineering,Nanchang 330039,Jiangxi)

机构地区：[1]江西省水利科学院,江西南昌330039

出　　处：《陕西水利》2023年第10期32-34,共3页Shaanxi Water Resources

摘　　要：坡地养分流失导致土地生产力下降和非点源污染,为了研究降雨强度对坡地农田径流及氮损失率的影响。通过实验分析降雨对缓坡农田径流和氮损失的影响。结果表明:径流量随降雨强度的增加而增加,地表径流量均大于地下径流量。岩溶坡地从地下径流到地表径流的临界降雨强度在40 mm/h~60 mm/h之间。Nutrient loss from slope land leads to land productivity decline and non-point source pollution.In order to study the impact of rainfall intensity on slope farmland runoff and nitrogen loss rate.Experimental analysis of the impact of rainfall on runoff and nitrogen loss from farmland on gentle slopes.The results show that the runoff increases with the increase of rainfall intensity,and the surface runoff is greater than the underground runoff.The critical rainfall intensity from underground runoff to surface runoff on karst slopes is between 40mm/h and 60mm/h.

关 键 词：降雨强度 岩溶地区 水土流失 径流 

分 类 号：TV121.1[水利工程—水文学及水资源]