| 土壤前期含水量对弃渣坡面侵蚀特性影响的模拟试验 |
| |
| 引用本文： | 安晓奇,郭成久,苏芳莉,郎连山,洪运亮.土壤前期含水量对弃渣坡面侵蚀特性影响的模拟试验[J].水土保持研究,2009,16(6). |
| |
| 作者姓名： | 安晓奇 郭成久 苏芳莉 郎连山 洪运亮 |
| |
| 作者单位： | 1. 沈阳农业大学,水利学院,沈阳,110161
2. 辽宁省建吕县水利局,辽宁,建昌,125300 |
| |
| 基金项目： | 辽宁省教育厅资助项目 |
| |
| 摘 要： | 利用室内人工模拟降雨试验,研究弃渣前期含水量在不同降雨强度条件下对土壤坡面入渗、产流和产沙特性的影响.结果表明:弃渣坡面入渗率随时间呈幂函数变化.在雨强较小(0.64 mm/min)的情况下,含沙率在产流初期会出现峰值,之后随时间递减,前期含水量越高,峰值出现的越早,土壤前期含水量对土壤侵蚀量的影响符合幂函数变化规律.在1.05 mm/min降雨强度条件下,含沙率变化呈波动性增长趋势,无明显峰值.土壤前期含水量对土壤侵蚀量影响呈二次多项式关系,计算得出土壤流失量最少的最优前期含水量为9.65%.
|
| 关 键 词： | 土壤前期含水量 入渗 弃渣场 土壤侵蚀 |
Simulation Experiment of Effect of Antecedent Soil Moisture Content on Characteristics of Soil Erosion from Dumping Soil Land |
| |
| AN Xiao-qi,GUO Cheng-jiu,SU Fang-li,LANG Lian-shan,HONG Yun-liang.Simulation Experiment of Effect of Antecedent Soil Moisture Content on Characteristics of Soil Erosion from Dumping Soil Land[J].Research of Soil and Water Conservation,2009,16(6). |
| |
| Authors: | AN Xiao-qi GUO Cheng-jiu SU Fang-li LANG Lian-shan HONG Yun-liang |
| |
| Abstract: | The effect of antecedent soil moisture content on characteristics of in filtration, runoff and sediment was investigated by rainfall simulation experiment of dumping soil. The results showed that:infiltration rate spoil slope power function with time changes, the higher the initial moisture content, the faster the runoff. However, under different rainfall conditions the laws well change. Rainfall intensity under 0. 64 mm/min conditions,the rate of sediment runoff will peak early, diminishing with time, antecedent soil moisture content the higher, the earlier of peak. Rainfall intensity under 1.05 mm/min conditions, changes in sediment was the volatility of the rate of growth, no significant peak. The optimal antecedent soil moisture content values for minimization of soil losses is determined by the approximately parabola relations of soil losses and antecedent soil moisture content,which is 9.65%. |
| |
| Keywords: | antecedent soil moisture content infiltration dumping pile soil erosion |
| 本文献已被 万方数据 等数据库收录！ |
|
