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采用野外放水冲刷实验的方法,对扰动地面产流产沙规律进行了研究。结果表明:(1)平均产流时间和平均产流量均与坡度不相关,平均产流时间与放水流量呈幂函数关系,平均产流量与放水流量呈二次函数关系。(2)当放水流量为10 L.min-1时,产沙量与坡度呈线性关系,其它放水流量下,产沙量与坡度均呈对数关系;坡度为5°时,产沙量与放水流量呈幂函数关系,坡度为10°和18°时,呈线性关系,产沙量与径流量呈对数函数关系,放水流量是影响产沙量的主要因素。(3)产沙率随放水时间呈减小趋势,大约在前6 min内,产沙率呈增大趋势,达到一个峰值后迅速减小(6~15 min内)。
Using the method of field water scouring experiment, the law of disturbed ground runoff and sediment was studied. The results show that: (1) The average runoff time and average runoff are not related to the slope. The average runoff time is a power function relationship with the discharge water flow. The average runoff and discharge flow rate are quadratic function. (2) The sediment yield is linear with the slope when the water discharge is 10 L.min-1, while the sediment yield and slope are logarithmically under other water discharges. When the slope is 5 °, The discharge flux is a power function. The slope is 10 ° and 18 °, the relationship is linear. The relationship between sediment yield and runoff is a logarithmic function. The discharge flux is the main factor affecting the yield. (3) The sediment yield tends to decrease with the release of water, and the sediment yield tends to increase in the first 6 min. After reaching a peak, sediment yield decreases rapidly (within 6-15 min).