香格里拉不同植被类型坡面产流产沙试验研究

Study on Runoff and Sediment Production Test on Different Types of Slope in Xianggelila of Yunnan Province

运用坡面径流泥沙小区定位观测方法,对香格里拉脆弱生态区的4个不同植被类型坡面小区产流产沙特征进行了对比研究。结果显示,4个小区的产流量大小顺序为:人工林小区<自然恢复小区<草地小区<坡耕地小区;产沙量大小顺序为:自然恢复小区<人工林小区<草地小区<坡耕地小区。自然恢复小区和人工林小区有较好的水土保持的作用;产沙量与产流量之间的线性关系显著,相关系数达到0.9329以上。

Using the plot orientated observation method of slope runoff sediment,the characteristics of runoff and sediment production on slope plots with four vegetation types in fragile ecological zone of Xianggelila were compared and studied.The results showed that the order of four types’ runoff was artificial wood landnatural recovery landgrass landfarmland.The order of four types’sediment was artificial natural recovery land wood land grass land farmland.The natural recovery plots and artificial wood plots were good at protecting water and soil from runoff and erosion.There was significant linear relationship between the sediment yield and runoff,and the correlation coefficient was above 0.932 9.