水土保持学报2017，Vol.31Issue(3)：51-55,5.DOI:10.13870/j.cnki.stbcxb.2017.03.009
次降雨对马尾松低效林改造初期坡面产流产沙的影响
Effects of Single Rainfall on Slope Runoff and Sediment Yield of Low-efficiency Pinus massoniana Lamb.Forest in the Initial Stage of Reconstruction
摘要
Abstract
Forest regeneration or transformation is a critical period for forest land to be prone to soil erosion.In this paper,through the analysis of single rainfall and runoff and sediment yield data of five artificial runoff plots in different transformation models of low-efficiency Pinus massoniana Lamb.forest in Yibin City,Sichuan Province,the relationship between rainfall,runoff and sediment characteristics was explored.The results showed that,with the vegetation evolution,the total runoff of I-Ⅴ in 2014 decreased by-6.44％,-10.51％,20.95％,13.28％,and 12.73％,respectively,compared with that in the same period of 2012;the total sediment yield decreased by 58.4％,56.38％,77.72％,78.16％,and 79.68％,respectively.The runoff and sediment yield increased exponentially with the increase of rainfall,but the amount of sediment yield increased more.The sediment yield of runoff plots in the second and third year was significantly lower than that in the first year,but the difference between the second and third year was not significant,and there was no significant correlation between the runoff and sediment yield.The different patterns were not the main factors leading to the aggravation of soil erosion.There were significant differences between the time of reconstruction and the runoff and sediment yield.The results showed that the restoration effect of the clear cutting plot was better at the early stage of the reconstruction,but with the growth of the forest and the formation of the forest environment,the relationship between the transformation model and the runoff and sediment yield might be different.关键词
低效林/改造模式/次降雨/产流量/产沙量Key words
low-efficiency forest/transformation model/single rainfall/runoff/sediment yield分类
农业科技引用本文复制引用
张海涛,宫渊波,付万权,陈耀嘉,徐云岩,崔亚潇..次降雨对马尾松低效林改造初期坡面产流产沙的影响[J].水土保持学报,2017,31(3):51-55,5.基金项目
国家“十二五”科技支撑计划重大项目“长江上游低山丘陵区生态综合整治技术与示范”(2011BAC09B05) （2011BAC09B05）
四川省高校水土保持与荒漠化防治重点实验室建设项目 （）
