發(fā)布時(shí)間：2018-05-01 02:10

  本文選題：黃河班多水電站 + 工程區(qū)　； 參考：《水土保持研究》2016年04期

【摘要】：雷諾數(shù)是坡面水流水力學(xué)重要參數(shù)之一,闡明坡面水流雷諾數(shù)變化的特征將有助于從動(dòng)力學(xué)角度認(rèn)識(shí)坡面侵蝕過(guò)程的內(nèi)在機(jī)制。采用野外人工放水試驗(yàn)方法,對(duì)黃河班多水電站工程區(qū)荒草地坡面徑流型態(tài)進(jìn)行了試驗(yàn)研究,結(jié)果表明:(1)荒草地坡面水流型態(tài)判別指標(biāo)雷諾數(shù)隨供水過(guò)程的變化,在不同供水流量及不同坡度下都隨供水歷時(shí)的增長(zhǎng)而先增大后趨于穩(wěn)定,變化過(guò)程皆可用對(duì)數(shù)方程描述;(2)荒草地坡面水流平均雷諾數(shù)隨供水流量及坡度的增大而增大,可分別用冪函數(shù)方程和指數(shù)方程描述,隨坡度及供水流量的變化可用二元冪函數(shù)方程描述;(3)不同供水流量及不同坡度下,荒草地坡面水流雷諾數(shù)均小于500。次產(chǎn)流過(guò)程的坡面水流平均雷諾數(shù)變化為86~339,試驗(yàn)條件下工程區(qū)荒草地坡面水流型態(tài)均處于層流。
[Abstract]:Reynolds number is one of the important hydraulic parameters of slope flow. It will be helpful to understand the inherent mechanism of slope erosion process from the angle of dynamics by clarifying the characteristics of Reynolds number variation on slope surface. In this paper, the field artificial discharge test method is used to study the runoff patterns on the slope surface of the barren grassland in the Banduo Hydropower Station area of the Yellow River. The results show that the variation of Reynolds number, the discriminant index of the flow pattern on the slope surface of the wasteland, with the water supply process. Under different water supply flow and slope, the water supply increased first and then stabilized with the increase of water supply duration. The variation process can be described by logarithmic equation) the average Reynolds number of slope flow on barren grassland increases with the increase of water supply flow and slope. It can be described by power function equation and exponential equation respectively. The variation of slope and water supply flow can be described by binary power function equation.) under different water supply flow and different slope, the Reynolds number of waste grassland slope is less than 500. The average Reynolds number of the slope flow in the secondary runoff generation process is 86 ~ 339. Under the experimental conditions, the flow patterns on the slope surface of the barren grassland in the engineering area are all in laminar flow.
【作者單位】： 榆林學(xué)院生命科學(xué)學(xué)院;西北農(nóng)林科技大學(xué)水土保持研究所黃土高原土壤侵蝕與旱地農(nóng)業(yè)國(guó)家重點(diǎn)實(shí)驗(yàn)室;中國(guó)科學(xué)院水利部水土保持研究所;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目“應(yīng)用三區(qū)土盤試驗(yàn)解析黃土坡面片蝕動(dòng)力學(xué)過(guò)程”(41471230);國(guó)家自然科學(xué)基金項(xiàng)目“黃土坡面細(xì)溝侵蝕關(guān)鍵參數(shù)及其耦合關(guān)系試驗(yàn)研究”(41171227) 中國(guó)科學(xué)院重點(diǎn)項(xiàng)目“近百年黃土高原侵蝕環(huán)境與水沙變化”(KZZD-EW-04-03) 陜西省科技廳農(nóng)業(yè)攻關(guān)項(xiàng)目“生態(tài)修復(fù)植物引種利用研究與示范”(2014K01-12-03) 黃土高原土壤侵蝕與旱地農(nóng)業(yè)國(guó)家重點(diǎn)實(shí)驗(yàn)室開(kāi)放項(xiàng)目(A314021402-1604) 陜西省高�？茀f(xié)青年人才托舉計(jì)劃資助;陜西省高�？茀f(xié)青年人才托舉計(jì)劃(20150108);陜西省高�？茀f(xié)青年人才托舉計(jì)劃(20150108)
【分類號(hào)】：S157
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本文編號(hào)：1827251