| 伊犁河流域裸露缓坡地放水试验研究 |
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| 引用本文： | 马萍,宋锋惠,史彦江,王健,朱首军.伊犁河流域裸露缓坡地放水试验研究[J].中国水土保持科学,2010,8(1):34-39. |
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| 作者姓名： | 马萍 宋锋惠 史彦江 王健 朱首军 |
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| 作者单位： | 1. 西北农林科技大学资环学院,712100,陕西杨凌
2. 新疆林业科学研究院治沙所,830000,乌鲁木齐 |
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| 基金项目： | 国家科技支撑计划项目"伊犁河谷水土流失综合治理关键技术开发与示范" |
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| 摘 要： | 通过野外径流小区实地放水冲刷试验,研究伊犁河流域裸露缓坡地在不同放水条件下土壤水分变化、径流泥沙特征,并运用水力学理论分析坡面径流水力学参数特征。结果表明:1)土壤入渗率随着放水流量的增加呈现递增的趋势,随着放水量的增加,土壤表层含水量增大,入渗率随之减少,坡下部土壤水分变化量高于坡上;2)随着放水流量的增加,输沙率呈现递增的趋势,含沙量呈先增后减的趋势,含沙量与放水流量存在较好的幂函数关系,随着冲刷时间的延长,含沙量、输沙率均呈现递减的趋势;3)随着放水流量的增加,径流平均流速、雷诺数、Darcy-Weisbach阻力系数逐渐增大,弗劳德数逐渐减小,流速与流量、弗劳德数与雷诺数均呈良好的幂函数关系,水流为层流、急流状态。
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| 关 键 词： | 裸露缓坡地 放水冲刷 土壤水分 径流泥沙 水力学参数 |
Scouring erosion experiment on bare slight slope in Ili River Basin |
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| Ma Ping,Song Fenghui,Shi Yanjiang,Wang Jian,Zhu Shoujun.Scouring erosion experiment on bare slight slope in Ili River Basin[J].Science of Soil and Water Conservation,2010,8(1):34-39. |
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| Authors: | Ma Ping Song Fenghui Shi Yanjiang Wang Jian Zhu Shoujun |
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| Institution: | Ma Ping1,Song Fenghui2,Shi Yanjiang2,Wang Jian1,Zhu Shoujun1(1.Northwest Sci-Tech University of Agriculture , Forestry,712100,Yangling,Shaanxi,2.Xinjiang Forest-Science Academy,830000,Urumqi: China) |
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| Abstract: | Based on the scouring erosion experiment on bare slight slope in Ili River Basin,water infiltration and the characteristics of runoff and sediment were studied,and the hydraulic parameters characteristics of surface runoff were analyzed.The results showed: 1) Soil infiltration rate took on the trend of increasing as the scouring water discharge increased;however,it had a trend of decreasing with the scouring water amount increasing.A higher variation of soil water had on the lower slope compared to the uppe... |
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| Keywords: | bare slight slope water scouring soil water runoff and sediment hydraulic parameters |
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