水土保持研究2013，Vol.20Issue(1)：30-36,7.
降雨产沙资料整理方法对两者关系的影响
Effect of Mining Methods of Data of Rainfall and Sediment on the Relationship between Rainfall and Sediment Yield
摘要
Abstract
The reasonable mining method of soil erosion data is the foundation of exploiting data characteristic. Rainfall and sediment data of different vegetation restoration plots were collected from 2010 to 2011 in the ganxian county of jiangxi province. The relationships between precipitation and sediment were investigated by using four kinds of methods. The results indicated that expanding the time scale and interval of rainfalls could significantly improve the correlation between precipitation and sediment yield. Meanwhile, characteristic parameters of the fitting cures were impacted by different methods. Comprehensively considering the coefficient of determination and consistency of the cures properties, power function could describe the relationships between precipitation and sediment yield for different type plots with the method of interval of rainfalls not less than 7 days (interval between rainfalls less than 7 days as a statistical unit for the data). However, sediment rate in pure forest plot (Pinus massoniana) was significantly higher than those in vegetation restoration plots (Paspalum notatum and Lespedeza bicolor) in Pinus massoniana forest. With precipitation increase, sediment rate reduced down for pure forest plot, changed slowly for Paspalum notatum plot, increased rapidly for Lespedeza bicolor plot with lower canopy density. Therefore, controlling soil and water loss of eroded forestland was regarded as the primary task, and herbal should be grown firstly in the early period of vegetation restoration and progressive realization ecological community restoration of multi-layers structure with tree-shrub-herbal.关键词
降雨产沙/数据整理/植被恢复/产沙速率Key words
rainfall and sediment/ mining data/ vegetation restoration/ sediment rate分类
农业科技引用本文复制引用
李钢,梁音,曹龙熹..降雨产沙资料整理方法对两者关系的影响[J].水土保持研究,2013,20(1):30-36,7.基金项目
中国科学院知识创新工程重要方向项目(KZCX2-YW-438) （KZCX2-YW-438）
水利部长江委重点项目"花岗岩地区马尾松林地水土流失规律试验研究" （）
青年科学基金项目(41101253) （41101253）
