摘要
采用野外放水冲刷法研究了紫色土与黄沙壤弃渣下垫面产流产沙规律。结果表明:1不同下垫面累积径流量随冲刷时间线性增加,放水流量为10、15L/min时,累积径流量增长速率最大均为Ⅲ小区,分别为3.735和8.579。2不同下垫面径流量与产沙量均呈正相关关系,且水沙关系增长速率大小依次为Ⅱ小区(0.356)>Ⅲ小区(0.233)>Ⅰ小区(0.111)>Ⅳ小区(0.056)。3不同下垫面的产流量与产沙量均随放水流量的增大而增大,在各种下垫面中Ⅳ小区径流量增长率最大,而Ⅰ小区的径流量增长率最小,分别为41.58、16.33。
By using the outdoor scouring method,it was studied the law of the runoff and sediment generation process at the underlaying surface of purple soil and yellow sand loam soil on grass slope. The results showed that： 1with the erosion time increases,the accumulation cumulative runoffs of different underlaying surfaces also increase linearly.When the drainage flow is 10,15 L / min,the cumulative growth rate of runoff are 3. 735 and 8. 579 respectively in III district with the largest accumulated run- off increase rate; 2the runoff and sediment yield at different underlying surfaces showed a positive correlation,and growth rate of the relationship between water and sediment was ranked as II district（ 0. 356） 〉III district（ 0. 233）〉 I district（ 0. 111） 〉IV district（ 0. 056）; 3the runoff and sediment yield at different underlying surfaces increased followed with the increase of the flow discharge,of which the runoff in different underlaying surfaces has the largest increase rate at IV district while the lowest at the I district that are 41. 58 and 16. 33 respectively.
出处
《亚热带水土保持》
2014年第4期6-8,31,共4页
Subtropical Soil and Water Conservation
基金
重庆市水利局科技项目(2011)
西南大学本科生科技创新基金项目(1224003)
关键词
产流
产沙
弃土弃渣
放水冲刷试验
重庆市
runoff
sediment
waste soil and residue
water scouring experiment
Chongqing Municipality
