灌溉排水学报2013，Vol.32Issue(5)：47-50,58,5.DOI:10.7631/j.issn.1672-3317.2013.05.011
坡度对粘性红壤土坡面溶质迁移特征的影响
Effect of Gradients on Solute Transport Characteristics of Red Soil Hillslope under Simulated Rainfall Conditions
摘要
Abstract
The effect of gradient on runoff process and solute transport characteristic for red soil slope was investigated by using simulated rainfall experiments indoor.Results showed that the variations of runoff rate with time under different gradients for red soil slopes were described by linear functions.Total volume of runoff decreased linearly with the increase of gradient.There was a critical slope gradient for red soil erosion process according to the relationship between the sediment loss and slope gradient.The decay processes of Bromine concentrations in runoff were well described by a power function for different slope gradients.The Br-leaching depth in soil profile increased with the increase of slope and the soil extracted phosphorous distributed mainly in the soil profile of 5 cm in depth after simulating rainfall.It could be determined preliminarily that the critical slope gradient for the least loss of solution was approximate 15° according to the relationship between solution loss and gradients.关键词
坡度/溶质运移/模拟降雨/红壤土坡面Key words
gradient / solute transport / simulated rainfall/ red soil hillslopes分类
农业科技引用本文复制引用
平李娜,王辉,沈紫燕..坡度对粘性红壤土坡面溶质迁移特征的影响[J].灌溉排水学报,2013,32(5):47-50,58,5.基金项目
国家自然科学基金项目(40801107) （40801107）
