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(jìn)一步揭示土壤侵蝕的內(nèi)在規(guī)律,以某一試驗(yàn)小區(qū)為例,通過模擬不同地表粗糙度,分析了不同雨強(qiáng)條件下的坡面侵蝕產(chǎn)沙及泥沙顆粒粒徑變化特征。結(jié)果表明:相同雨強(qiáng)和降雨歷時(shí)下,粗糙度對坡面徑流率、水流功率、徑流含沙量和產(chǎn)沙率有顯著影響;侵蝕泥沙的搬運(yùn)形式與雨強(qiáng)和粗糙度均有關(guān),而不同泥沙顆粒搬運(yùn)方式是引起不同粗糙度坡面侵蝕產(chǎn)沙分異的重要原因。因此,坡面侵蝕產(chǎn)沙模型中應(yīng)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(shè)計(jì)和水土保持措施優(yōu)化配置提供一定依據(jù)。
[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(xué)院水土保持研究所;
【基金】：國家自然科學(xué)基金項(xiàng)目(41271303,40901135) “十一五”科技支撐計(jì)劃課題(2008BAD98B02)
【分類號】：S157.1

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本文編號：1906947