本文選題：粗糙度 + 泥沙分選　； 參考：《人民長江》2017年17期

【摘要】：為進一步揭示土壤侵蝕的內在規(guī)律,以某一試驗小區(qū)為例,通過模擬不同地表粗糙度,分析了不同雨強條件下的坡面侵蝕產沙及泥沙顆粒粒徑變化特征。結果表明:相同雨強和降雨歷時下,粗糙度對坡面徑流率、水流功率、徑流含沙量和產沙率有顯著影響;侵蝕泥沙的搬運形式與雨強和粗糙度均有關,而不同泥沙顆粒搬運方式是引起不同粗糙度坡面侵蝕產沙分異的重要原因。因此,坡面侵蝕產沙模型中應綜合考慮地表粗糙度和泥沙粒徑信息。研究成果可為水土保持規(guī)劃設計和水土保持措施優(yōu)化配置提供一定依據。
[Abstract]:In order to further reveal the inherent law of soil erosion, the variation characteristics of sediment yield and sediment particle size of slope erosion under different rainfall intensity were analyzed by simulating different surface roughness in an experimental plot. The results show that under the same rainfall intensity and rainfall duration, roughness has a significant effect on runoff rate, flow power, sediment content and sediment yield, and the transport form of erosion and sediment is related to rain intensity and roughness. The difference of sediment yield on different roughness slope is caused by different sediment particle transport methods. Therefore, the information of surface roughness and sediment particle size should be taken into account in the sediment yield model of slope erosion. The research results can provide some basis for planning and design of soil and water conservation and optimal allocation of soil and water conservation measures.
【作者單位】： 長江科學院水土保持研究所;
【基金】：國家自然科學基金項目(41271303,40901135) “十一五”科技支撐計劃課題(2008BAD98B02)
【分類號】：S157.1

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