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应用先进的UGT水蚀测量仪,研究黄土高原祖厉河流域雨强和植被覆盖度对典型坡面产流产沙的影响。结果表明:黄土高原半干旱区间隔为15min的产流量、径流含沙量和产沙量与15min雨强具有相同的增减趋势,呈三次曲线关系y=b0+b1x+b2x2+b3x3。7种雨强条件下,人类扰动撂荒地的产流量、径流含沙量和产沙量均明显大于植被自然恢复的撂荒地,覆盖度20%的撂荒地是覆盖度35%撂荒地的平均径流系数的2.35倍,径流含沙量的4.48倍,产沙量的14.06倍。相对于受到扰动的撂荒地,植被自然恢复的撂荒地水土保持效益显著。
The advanced UGT water erosion measuring instrument was used to study the effects of rainfall intensity and vegetation coverage on runoff and sediment yield of a typical slope on the Loess Plateau. The results showed that the runoff and sediment yield in the semi-arid region of the Loess Plateau varied from 15min to 15min, and had the same trend of increase and decrease with the 15min rainfall intensity, showing a cubic curve relationship of y = b0 + b1x + b2x2 + b3x3 Under the condition of rainfall intensity, the runoff, sediment concentration and sediment yield in the fallow area of human disturbance were significantly greater than those of the reclaimed land with natural restoration of vegetation. The wasteland with the coverage of 20% was the average runoff coefficient of 35% 2.35 times, 4.48 times the runoff sediment concentration, 14.06 times the sediment yield. Compared with the disturbed abandoned land, the benefits of soil and water conservation in the reclaimed land naturally restored by vegetation are significant.