本文選題：沖刷 + 沙�。� 參考：《農(nóng)業(yè)工程學(xué)報(bào)》2016年09期

【摘要】：為了解不同寬度沖刷槽對(duì)坡面沖刷侵蝕過程中產(chǎn)流產(chǎn)沙的影響,該研究以崩崗崩積體為對(duì)象,通過不同沖刷槽寬度(10、20、30、40、50 cm)和不同單寬流量(1.2×10-2、2.4×10-2、3.6×10-2、4.8×10-2 m2/min)相結(jié)合的室內(nèi)模擬沖刷試驗(yàn),研究不同寬度沖刷槽對(duì)崩積體產(chǎn)流產(chǎn)沙的影響。結(jié)果表明:1)單寬流量為1.2×10-2,2.4×10-2,3.6×10-2 m2/min時(shí),不同沖刷槽寬度之間徑流率、產(chǎn)沙率存在顯著差異(P0.05);單寬流量為4.8×10-2 m2/min時(shí),不同沖刷槽寬度之間徑流率、產(chǎn)沙率差異不顯著。2)單寬流量一定,不同沖刷槽寬度下徑流率隨時(shí)間變化趨勢(shì)相同;單寬流量為1.2×10-2 m2/min時(shí),不同沖刷槽寬度條件下產(chǎn)沙率和含沙量隨時(shí)間變化趨勢(shì)不同,其他單寬流量下產(chǎn)沙率和含沙量隨時(shí)間變化趨勢(shì)相同。3)單寬流量相同,不同沖刷槽寬度下累積徑流量差異不顯著;單寬流量為1.2×10-2,2.4×10-2,3.6×10-2 m2/min條件下,不同沖刷槽寬度下累積產(chǎn)沙量和平均含沙量差異顯著(P0.05)。該研究揭示了沖刷槽寬度對(duì)崩積體產(chǎn)流產(chǎn)沙的影響,為今后試驗(yàn)沖刷槽寬度的選擇提供參考。
[Abstract]:In order to understand the effect of different width scour grooves on runoff and sediment yield during erosion erosion on slope surface, an indoor simulated scour experiment was carried out with the combination of different erosion channel widths (1020 / 30 ~ 4050 cm) and a single wide flow rate (1.2 脳 10 ~ (-2) (2.4 脳 10 ~ (-2)) 脳 10 ~ (-2) 路m ~ (-2) 路m ~ (-2) 路m ~ (2 / min). The effect of different width scour grooves on sediment yield of avalanche was studied. The results show that there are significant differences in runoff rate and sediment yield rate between different flushing channel widths when the single width discharge is 1.2 脳 10 ~ (-2) ~ (-2) and 2.4 脳 10 ~ (-2) ~ (-2) 脳 10 ~ (-2) m2/min, while there is no significant difference in runoff rate and sediment yield rate between different scour channel widths at a single wide flow rate of 4.8 脳 10 ~ (-2) m2/min, and there is no significant difference in sediment yield rate between different flushing channel widths at a single wide flow rate of 4.8 脳 10 ~ (-2) m2/min. The variation trend of runoff rate with time is the same under different scour channel width, and the variation trend of sediment yield and sediment content with time is different when the single width discharge is 1.2 脳 10 ~ (-2) m2/min. The variation trend of sediment yield and sediment content with time is the same. 3) single width discharge is the same, but there is no significant difference in cumulative runoff under different scour channel width, and under the condition of 1.2 脳 10 ~ (-2) C ~ (-2) ~ (-2) 脳 10 ~ (-2) ~ (-2) 脳 10 ~ (-2) ~ (-2) 脳 10 ~ (-2) m2/min. The difference of accumulative sediment yield and average sediment content under different scour channel width is significant (P 0.05). This study reveals the influence of the width of the scour trough on the sediment yield of the caving body and provides a reference for the selection of the width of the scour trough in the future test.
【作者單位】： 福建農(nóng)林大學(xué)資源與環(huán)境學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(41001169,41571272) 國家科技支撐計(jì)劃項(xiàng)目(2014BAD15B0303)
【分類號(hào)】：S157.1

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