礦山邊坡坡度對(duì)降雨入滲與侵蝕過(guò)程影響試驗(yàn)
發(fā)布時(shí)間:2019-01-04 17:38
【摘要】:以河南省焦作市某礦山邊坡為例,利用人工模擬降雨試驗(yàn)研究了礦山邊坡坡度對(duì)降雨入滲及產(chǎn)流侵蝕過(guò)程的影響。試驗(yàn)結(jié)果表明:雨強(qiáng)對(duì)入滲過(guò)程有重要影響,雨強(qiáng)在120~180 mm/h變化時(shí),平均入滲率隨雨強(qiáng)增大而增大,并隨時(shí)間逐漸減小;坡度為20°~45°范圍內(nèi),隨邊坡坡度減小,平均入滲率呈增大趨勢(shì),壓實(shí)度增大,土壤孔隙率減小,入滲能力減小;土壤侵蝕量與土壤侵蝕模數(shù)隨降雨強(qiáng)度增大而增大,侵蝕模數(shù)在邊坡35°處出現(xiàn)較大轉(zhuǎn)折;隨著邊坡坡度增大,浸潤(rùn)鋒入滲邊坡的速率增大,坡度越大浸潤(rùn)鋒向坡底發(fā)展的速率越大。
[Abstract]:Taking a mine slope in Jiaozuo City, Henan Province as an example, the effect of slope gradient on rainfall infiltration and runoff erosion process was studied by artificial simulated rainfall test. The results show that the rainfall intensity has an important effect on the infiltration process. When the rainfall intensity changes at 120 ~ 180 mm/h, the average infiltration rate increases with the increase of rain intensity, and decreases gradually with time. In the range of 20 擄~ 45 擄, the average infiltration rate increases, compactness increases, soil porosity decreases and infiltration capacity decreases with slope gradient decreasing. Soil erosion and soil erosion modulus increased with the increase of rainfall intensity, and the erosion modulus changed at 35 擄of slope. With the slope gradient increasing, the infiltration front infiltration rate of the slope increases, and the more the slope degree increases, the more the infiltration front develops to the bottom of the slope.
【作者單位】: 黃淮學(xué)院建筑工程學(xué)院;中國(guó)地質(zhì)大學(xué)工程學(xué)院;
【基金】:國(guó)家自然科學(xué)基金資助項(xiàng)目(41272377) 河南省科技廳科技攻關(guān)計(jì)劃項(xiàng)目(122102310477)
【分類(lèi)號(hào)】:S157.1
本文編號(hào):2400586
[Abstract]:Taking a mine slope in Jiaozuo City, Henan Province as an example, the effect of slope gradient on rainfall infiltration and runoff erosion process was studied by artificial simulated rainfall test. The results show that the rainfall intensity has an important effect on the infiltration process. When the rainfall intensity changes at 120 ~ 180 mm/h, the average infiltration rate increases with the increase of rain intensity, and decreases gradually with time. In the range of 20 擄~ 45 擄, the average infiltration rate increases, compactness increases, soil porosity decreases and infiltration capacity decreases with slope gradient decreasing. Soil erosion and soil erosion modulus increased with the increase of rainfall intensity, and the erosion modulus changed at 35 擄of slope. With the slope gradient increasing, the infiltration front infiltration rate of the slope increases, and the more the slope degree increases, the more the infiltration front develops to the bottom of the slope.
【作者單位】: 黃淮學(xué)院建筑工程學(xué)院;中國(guó)地質(zhì)大學(xué)工程學(xué)院;
【基金】:國(guó)家自然科學(xué)基金資助項(xiàng)目(41272377) 河南省科技廳科技攻關(guān)計(jì)劃項(xiàng)目(122102310477)
【分類(lèi)號(hào)】:S157.1
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