基于VFSMOD模型的黃土坡面生草帶產(chǎn)流產(chǎn)沙動(dòng)態(tài)模擬
發(fā)布時(shí)間：2018-11-07 21:53
【摘要】：利用微型徑流小區(qū)和人工降雨試驗(yàn),探討運(yùn)用VFSMOD模型評(píng)估和預(yù)測(cè)引入不同草種生草帶后黃土坡面產(chǎn)流產(chǎn)沙動(dòng)態(tài)特征的可行性。通過(guò)土壤物理性質(zhì)參數(shù)和生草帶生長(zhǎng)狀態(tài)參數(shù)的差異,模型還原了黃土坡面引入白三葉生草帶與百脈根生草帶后產(chǎn)流產(chǎn)沙特征的差異及其隨生長(zhǎng)時(shí)期的變化,模擬效果可靠,納什系數(shù):0.93(徑流系數(shù)),0.98(修正后產(chǎn)沙量);歸一化均方根誤差:6.2%(徑流系數(shù)),10.9%(修正后產(chǎn)沙量)。當(dāng)生草帶在降雨集中期(如本研究中百脈根草帶9月上旬)不能保證較好的生長(zhǎng)狀態(tài)和地表覆蓋時(shí),其坡面產(chǎn)沙量急劇增大,且明顯大于VFSMOD模型模擬值。在實(shí)際生草帶設(shè)計(jì)時(shí),應(yīng)避免該情況發(fā)生。綜上,VFSMOD模型適用于引入生草帶后黃土坡面產(chǎn)流、產(chǎn)沙量的模擬和預(yù)測(cè)。
[Abstract]:The feasibility of using VFSMOD model to evaluate and predict the dynamic characteristics of sediment yield and sediment yield in loess slope after introducing different grass species into the loess slope was discussed by using micro-runoff plot and artificial rainfall experiment. Through the difference of soil physical property parameters and growth state parameters of grass growing zone, the model reduced the difference of the characteristics of abortion and sediment production after the introduction of white clover grass belt and Baimao root grass belt on the loess slope and its variation with the growth period, and the simulation effect was reliable. Nash coefficient: 0.93 (runoff coefficient), 0.98 (modified sediment yield); Normalized root mean square error: 6.2% (runoff coefficient), 10.9% (modified sediment yield). When the growth state and surface cover of the grass belt are not guaranteed in the rainfall concentration period (such as in the first ten days of September), the sediment yield on the slope increases sharply, and it is obviously larger than the simulated value of VFSMOD model. In the actual design of grass belt, this situation should be avoided. In summary, VFSMOD model is suitable for simulation and prediction of runoff and sediment yield on loess slope after the introduction of grass belt.
【作者單位】： 西北農(nóng)林科技大學(xué)水土保持研究所;西北農(nóng)林科技大學(xué)水利與建筑工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(41571506、51579212) 國(guó)家重點(diǎn)研發(fā)計(jì)劃(2016YFC0400204) 陜西省科技統(tǒng)籌創(chuàng)新工程項(xiàng)目(2015KTCL02-25、2016KTZDNY-01-03)
【分類號(hào)】：S157.4
，
本文編號(hào)：2317666
[Abstract]:The feasibility of using VFSMOD model to evaluate and predict the dynamic characteristics of sediment yield and sediment yield in loess slope after introducing different grass species into the loess slope was discussed by using micro-runoff plot and artificial rainfall experiment. Through the difference of soil physical property parameters and growth state parameters of grass growing zone, the model reduced the difference of the characteristics of abortion and sediment production after the introduction of white clover grass belt and Baimao root grass belt on the loess slope and its variation with the growth period, and the simulation effect was reliable. Nash coefficient: 0.93 (runoff coefficient), 0.98 (modified sediment yield); Normalized root mean square error: 6.2% (runoff coefficient), 10.9% (modified sediment yield). When the growth state and surface cover of the grass belt are not guaranteed in the rainfall concentration period (such as in the first ten days of September), the sediment yield on the slope increases sharply, and it is obviously larger than the simulated value of VFSMOD model. In the actual design of grass belt, this situation should be avoided. In summary, VFSMOD model is suitable for simulation and prediction of runoff and sediment yield on loess slope after the introduction of grass belt.
【作者單位】： 西北農(nóng)林科技大學(xué)水土保持研究所;西北農(nóng)林科技大學(xué)水利與建筑工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(41571506、51579212) 國(guó)家重點(diǎn)研發(fā)計(jì)劃(2016YFC0400204) 陜西省科技統(tǒng)籌創(chuàng)新工程項(xiàng)目(2015KTCL02-25、2016KTZDNY-01-03)
【分類號(hào)】：S157.4
，
本文編號(hào)：2317666
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