摘要
采用网格结合模拟降雨研究方法,对凤阳山枯落物水文特性进行了研究。结果表明,在一定的雨强和降水量条件下,枯落物层中产生的径流量与坡度有着密切关系,坡度越大,产生的径流量越大;渗流在降雨结束后的延续时间与坡度有着密切关系,坡度越大,渗流延续时间越长;径流在降雨结束后的延续时间与坡度有着密切关系,坡度越大,径流延续时间越长;一般情况下,渗流较径流先产生、后结束;产生渗流的面积与坡度关系密切,坡度越大,产生渗流的面积越大;不同坡度位置产生渗流的时间随着降雨点坡向距离(以下简称为距离)的增加呈线性变化关系;实验表明,临界坡度约为30°;随着坡度的增加,产生渗流的距离变长;渗流主要集中在降雨点附近,该区域的渗流量所占总渗流量的比例随着坡度增加而减少。
Studies were conducted on hydrological properties of litter in Fengyangshan Nature Reserve, Zhejiang province by means of simulated rainfall. The results showed that under the same conditions of rainfall intensity and rainfall lasting time, the runoffhad a close positive relationship with the slope. The lasting time of infiltration aRer ending of rainfall had a close positive relationship with slope. The lasting time of infiltration after ending of rainfall had close positive relationship with slope. The lasting time of runoff aider rainfall had positive relation with slope.The infiltration area had close positive relationship with the slope. Start of infiltration in different slopes had linear relationship with the distance to the rainfall point. This experiment showed that the critical slope about 30°. The greater slope was, the longer distance of infiltration appeared. Runoff appeared mainly near the rainfall point, and the percentage of infiltration decreased with the increase of slope.
出处
《浙江林业科技》
北大核心
2012年第6期1-7,共7页
Journal of Zhejiang Forestry Science and Technology
关键词
枯落物
模拟降雨
水文特性
渗流
径流
litter
simulated rainfall
hydrology properties
infiltration
runoff
