中国南方红壤丘陵区土壤侵蚀量与泥沙输移比研究

Research on soil erosion amount and sediment delivery ratio in the hilly red soil region of southern China

依据＂层次类剔法＂的研究思路,估算了赣江各水文站控制流域的年均侵蚀量与泥沙输移比。结果表明,赣江流域年均侵蚀量1923.0万t/a,平均侵蚀模数237.6t/km^2·a;流域内中、低山地貌类型区泥沙输移比大于0.9,丘陵和平原区介于0.5-0.9之间,流域平均为0.54;且土壤侵蚀强度和泥沙输移比分别与流域面积没有规律性的趋势性关系。

Based on the relief-plot hierarchy analysis method, the annual average erosion amount and sediment delivery ratio of each drainage area contorlled by hydrological station in the Gan River were evaluated. The results showed that the annual average erosion amount and modulus of the Gan River were 1923.0×10^4 t/a and 237.6 t/km^2.a, respectively. The sediment delivery rations in middle mountain and low mountain area were more than 0.9, in hilly and plain area were 0.5-0.9, and in the whole Gan River basin was 0.52 average. Furthermore, no definite relationship of soil erosion intensity and sediment delivery ratio with basin area was found, respectively.