摘要
运用人工模拟降雨研究了裸地及不同盖度沙打旺草地产流产沙过程。结果表明：裸地产流产沙过程可用指数函数ｙ＝ｅ^（ａ＋ｂｘ）型式描述；不同盖度的沙打旺草地产流产沙过程均可用幂函数ｙ＝ａｘ~ｂ来描述，且随着盖度由大向小变化，方程参数ａ值减小，ｂ值增大。
The process of runoff and sediment yield in bareland and Astragulus adsurgens of dif-ferent coverage were studied by means of artiflcial simulated rainfall.The results Showed:theprocess of runoff and sediment yield were expontal(y=e￣(a+bx))distribution in bareland,and werepower(y=ax￣b)distribution in Astragulus adsurgens grassland.When coverage varyed fromhigh to low the parameter a decreacing,and b increasing.
