元谋干热河谷坡面造林整地截流减沙作用研究  

Study on Effect of Runoff Interception and Sediment Reduction by Site Preparation in Sloping Area for Afforestation in Dry-Hot Valley of Yuanmou County

作　　者：王建文 熊文森 刘安平 刘海[4] 梁少琳[4] 

机构地区：[1]云南省水土保持生态环境监测总站,云南昆明650021 [2]永仁县水务局,云南永仁651400 [3]元谋县水土保持办公室,云南元谋651300 [4]西南林业大学环境科学与工程学院,云南昆明650224

出　　处：《西南林学院学报》2011年第6期31-35,共5页Journal of Southwest Forestry College

基　　金：云南省科技计划项目(2006SG20)资助

摘　　要：选择元谋干热河谷地区典型区段,采用坡面径流小区观测方法,以自然荒草丛坡面为对照,研究在自然降雨条件下,反坡梯田整地、水平阶整地两种造林整地方式对坡面径流泥沙的截流减沙作用。结果表明,反坡梯田和水平阶造林整地对地表径流的拦蓄都具有很好的作用,但反坡梯田整地方式比水平阶拦蓄径流能力更强,观测期反坡梯田整地和水平阶整地比自然坡面产流量分别减少71.42%和33.68%,产沙量分别减少56.02%和38.57%;实施造林整地措施后,随着时间的推移,产流产沙量越来越少,单场暴雨或特大暴雨对拦蓄径流和拦截泥沙效果起主导作用。Taking natural uncultivated grass slope as the control, the effect on runoff interception and sediment reduction by adverse slope terrace and level bench site preparation methods for afforestation was comparatively stud- ied under the natural rainfall condition in the hot dry valley of Yuanmou County by means of runoff plot observation method. The results showed that both types of adverse slope terrace and level bench site preparation played a very good role in the runoff interception, whereas the adverse slope terrace method had better result. Compared to the natural grass slope, the decrement of the runoff output from the adverse slope terrace and the level bench site prep- aration was 71.42% and 33.68%, the decrement of sediment by these two types of site preparation was respective- ly 56.02% and 38.57% during the observation period of time. With the passage of time, the effect of runoff inter- ception and sediment reduction of the site preparation was progressively improved, the runoff and sediment output was gradually reduced. Single rainstorm or extraordinary heavy rainstorm played a leading role in reducing the effect of the site preparation.

关 键 词：干热河谷 造林整地 径流 泥沙 

分 类 号：S714.7[农业科学—林学]