摘要
为了科学治理非硬化路面水土流失,采用野外放水冲刷试验,对非硬化路面侵蚀产沙规律进行了试验研究。结果表明,同一坡度不同放水流量与同一放水流量不同坡度条件下,非硬化路面产沙随时间的变化形式均有3种,分别为平缓型、多峰型和单峰型。对同一路面不同观测断面的产沙量分析发现,产沙量沿坡面的空间变化形式分别为波动式减小、逐渐式减小和先增大后减小。、得出平均含沙量与放水流量呈对数相关,产沙率与放水流量、平均含沙量与坡度、产沙率与坡度均呈直线相关。以期为非硬化路面的水土流失预测和治理提供科学依据。
A field scouring experiment on soil erosion and sediment yield on unpaved roads was conducted to provide scientific date for predicting and controlling soil and water loss on unpaved roads. Results indicated that the variation of sediment yield appeared in three types,which were smooth,multimodal,and unmoral distribution on the condition of combination of same slope with different runoff discharges,or same discharge with different slopes. Spatial variation of sediment yield with slope profile could be showed reduction in three types,wave,gradual reduction and reduction after increase on the same road surface. The variations of average sediment concentration with supplied runoff discharge were accorded with logarithmic correlations. But,variations of sediment yield rate with supplied runoff discharges,average sediment concentration with slope,sediment yield rate with slope were accorded with linear correlation. The result was prospected to provide theoretical foundation for research and predication in the soil erosion of unpaved roads.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2010年第12期79-83,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家自然科学基金"煤矿开发建设中人为侵蚀机理及新增水土流失预报模型-以神府东胜煤田为例"(40771127)
水利部公益性行业专项"生产建设项目水土流失测算共性技术研究"(201001036)
西北农林科技大学优秀博士启动基金
黄土高原土壤侵蚀与旱地农业国家重点实验室专项(10502-Z3-5)
关键词
输沙
侵蚀
经流
非硬化路面
平均含沙量
产沙率
坡度
sediment transport
erosion
runoff
unpaved roads
average sediment concentration
sediment yield rate
slope
