坡面薄層水流優(yōu)勢(shì)流速研究
[Abstract]:Runoff formed by rainfall is the main power source of soil erosion on slope. Runoff velocity is one of the important parameters of soil erosion model. In order to study the relationship between electrolyte dominant velocity and flow velocity in the process of measuring flow velocity on slope surface by electrolyte tracer method, the experimental flume was used in this study under the conditions of 4 擄~ 8 擄~ 12 擄and 12 ~ 2448 L/min flow rate. The electrolyte transfer process was measured with a probe at 1.5 m from the electrolyte injection position of 0.3 ~ 0.6 ~ 0.9 ~ 1.2m, and the electrolyte dominant velocity of the measured sections was calculated under different operating conditions. The results show that the influence of flow rate on the electrolyte dominant velocity is greater than that of the slope, and the electrolyte dominant velocity increases with the increase of the distance. The variation process of the electrolyte dominant velocity with the distance is calculated by exponential function fitting. The stable electrolyte dominant velocity, that is, the dominant current velocity of water flow, was obtained in the range of 0.241 ~ 0.568 m / s. With the increase of slope and flow, the dominant flow velocity increases. The effect of flow rate on the increase of dominant flow velocity is greater than that of slope. Under different slope and discharge conditions, the dominant flow velocity and the average flow velocity are basically the same, the ratio of them is 1.007, the ratio of the dominant velocity to the maximum velocity is 0.774, and the ratio of the average velocity to the maximum velocity is 0.776, which accords with the flow pattern of thin layer flow on the slope. The results can provide a new calculation method and reference data for the study of thin layer hydrodynamic process on slope surface.
【作者單位】: 中國(guó)農(nóng)業(yè)大學(xué)水利與土木工程學(xué)院;天津市龍網(wǎng)科技發(fā)展有限公司;
【基金】:國(guó)家自然科學(xué)基金重點(diǎn)項(xiàng)目“高海拔寒區(qū)融水土壤侵蝕機(jī)理與過(guò)程模擬研究”(41230746)
【分類號(hào)】:S157.1
【相似文獻(xiàn)】
相關(guān)期刊論文 前10條
1 吳普特,周佩華;黃土坡面薄層水流侵蝕試驗(yàn)研究[J];土壤侵蝕與水土保持學(xué)報(bào);1996年01期
2 吳普特,周佩華;雨滴擊濺在薄層水流侵蝕中的作用[J];水土保持通報(bào);1992年04期
3 何小武,張光輝,劉寶元;坡面薄層水流的土壤分離實(shí)驗(yàn)研究[J];農(nóng)業(yè)工程學(xué)報(bào);2003年06期
4 李光錄;吳發(fā)啟;趙小風(fēng);龐小明;;雨滴擊濺下薄層水流的輸沙機(jī)理研究[J];西北農(nóng)林科技大學(xué)學(xué)報(bào)(自然科學(xué)版);2009年09期
5 王文龍,雷阿林,李占斌,唐克麗;黃土丘陵區(qū)坡面薄層水流侵蝕動(dòng)力機(jī)制實(shí)驗(yàn)研究[J];水利學(xué)報(bào);2003年09期
6 閆美華;王建;任海軍;;雨滴擊濺及薄層水徑流動(dòng)力對(duì)坡面侵蝕影響的研究[J];中國(guó)農(nóng)村水利水電;2011年03期
7 吳普特;周佩華;;坡面薄層水流流動(dòng)型態(tài)與侵蝕搬運(yùn)方式的研究[J];水土保持學(xué)報(bào);1992年01期
8 夏衛(wèi)生,雷廷武,張晴雯,趙軍;坡面薄層水流中電解質(zhì)脈沖遷移模型[J];水利學(xué)報(bào);2003年11期
9 吳淑芳;吳普特;原立峰;;坡面徑流調(diào)控薄層水流水力學(xué)特性試驗(yàn)[J];農(nóng)業(yè)工程學(xué)報(bào);2010年03期
10 吳普特,周佩華;地表坡度與薄層水流侵蝕關(guān)系的研究[J];水土保持通報(bào);1993年03期
相關(guān)會(huì)議論文 前2條
1 夏衛(wèi)生;雷廷武;趙軍;張晴雯;潘英華;;薄層水流中電解質(zhì)脈沖遷移模型[A];第八屆全國(guó)青年土壤暨第三屆全國(guó)青年植物營(yíng)養(yǎng)與肥料科學(xué)工作者學(xué)術(shù)討論會(huì)論文集[C];2002年
2 安翼;劉青泉;;坡面薄層水流的流速分布特征分析[A];第十一屆全國(guó)水動(dòng)力學(xué)學(xué)術(shù)會(huì)議暨第二十四屆全國(guó)水動(dòng)力學(xué)研討會(huì)并周培源誕辰110周年紀(jì)念大會(huì)文集(上冊(cè))[C];2012年
相關(guān)重要報(bào)紙文章 前1條
1 胡良惠;蓮藕覆膜廂作的栽培[N];湖北科技報(bào);2004年
相關(guān)碩士學(xué)位論文 前3條
1 范典;坡面薄層水流水動(dòng)力學(xué)特性試驗(yàn)研究[D];西北農(nóng)林科技大學(xué);2016年
2 楊錦;人工加糙坡面薄層水流水動(dòng)力學(xué)特性試驗(yàn)研究[D];西北農(nóng)林科技大學(xué);2008年
3 敬向鋒;坡面薄層水流水動(dòng)力學(xué)規(guī)律的試驗(yàn)研究[D];西北農(nóng)林科技大學(xué);2007年
,本文編號(hào):2184526
本文鏈接:http://www.sikaile.net/kejilunwen/nykj/2184526.html