采用一維水平入滲試驗(yàn)測定古爾班通古特沙漠南緣丘間地風(fēng)沙土滲透系數(shù)
本文選題:水平入滲 + 滲透系數(shù); 參考:《干旱區(qū)地理》2017年04期
【摘要】:通過室內(nèi)土壤水平一維入滲試驗(yàn),測定了不同入滲水頭作用下不同入滲時(shí)間對應(yīng)的累計(jì)入滲量和濕潤鋒長度,分析了累計(jì)入滲量與濕潤鋒長度、累計(jì)入滲量與入滲時(shí)間平方根的關(guān)系,探討了采用不同入滲水頭作用下的水平入滲試驗(yàn)測定古爾班通古特沙漠南緣丘間地風(fēng)沙土滲透系數(shù)的適用性。研究結(jié)果表明:累計(jì)入滲量與濕潤鋒長度呈顯著的線性關(guān)系;累計(jì)入滲量與入滲時(shí)間平方根呈顯著的線性關(guān)系,Philip公式較好地反映了不同入滲水頭作用下的水平入滲特點(diǎn);采用水平土柱入滲試驗(yàn)測定古爾班通古特沙漠南緣丘間地風(fēng)沙土滲透系數(shù)是可行的。研究結(jié)果可為干旱區(qū)風(fēng)沙土水力學(xué)研究提供參數(shù),為推求風(fēng)沙土水動(dòng)力學(xué)參數(shù)的方法選擇提供理論參考。
[Abstract]:The accumulative infiltration amount and wetting front length corresponding to different infiltration time under different infiltration water head were measured by one-dimensional infiltration test at indoor soil level, and the accumulative infiltration amount and wetting front length were analyzed. The relationship between the cumulative infiltration amount and the square root of infiltration time is discussed. The applicability of horizontal infiltration test under the action of different infiltration heads to determine the permeability coefficient of wind-blown sand soil in the southern margin of Guerbantungute Desert is discussed. The results show that there is a significant linear relationship between the cumulative infiltration amount and the length of the wetting front, and there is a significant linear relationship between the cumulative infiltration amount and the square root of the infiltration time. It is feasible to use the horizontal soil column infiltration test to determine the permeability coefficient of the sandy soil between the dunes in the southern margin of the Gulban Tungut Desert. The results can provide parameters for the study of hydrodynamics of wind-sand soil in arid area and theoretical reference for the selection of hydrodynamic parameters of wind-sand soil.
【作者單位】: 中國科學(xué)院新疆生態(tài)與地理研究所荒漠與綠洲生態(tài)國家重點(diǎn)實(shí)驗(yàn)室;中國科學(xué)院大學(xué);中國科學(xué)院南京土壤研究所土壤與農(nóng)業(yè)可持續(xù)發(fā)展國家重點(diǎn)實(shí)驗(yàn)室;
【基金】:國家基礎(chǔ)研究發(fā)展計(jì)劃項(xiàng)目(2013CB429905) 國家自然科學(xué)基金項(xiàng)目(41671032,U1303181,41371011,41601107)
【分類號】:S152.72
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