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浙江天童常绿阔叶林灌丛降雨再分配研究

发表时间:2010-09-30  浏览量:1241  下载量:610
全部作者: 沈会涛,由文辉
作者单位: 华东师范大学资源与环境科学学院
摘 要: 植被的降雨分配作用对理解生态系统的水文功能具有重要意义。采用定位研究方法对浙江天童地区常绿阔叶林灌丛的降雨再分配进行研究。结果表明:研究期内,林外总降雨量为1 384.4 mm,林内穿透雨、树干茎流量和林冠截留量分别占总降雨量的65.4%,9.2%和25.4%;当林外降雨量≥3.3 mm时,林内才观测到穿透雨和树干茎流;穿透雨量、树干茎流量和冠层截留量与降雨量均呈极显著的线性正相关(P<0.01);穿透雨率与降雨量呈对数负相关,树干茎流率与降雨量的相互关系并不明显,冠层截留率与降雨量呈幂函数关系。穿透雨的空间变异系数随降雨量的增加而减少,并分别在0.05和0.1的显著水平上对穿透雨的承接数量进行了计算,当降雨量较小时,需要增加林内穿透雨承接装置的数量以提高观测数据的代表性。
关 键 词: 森林水文学;常绿阔叶林灌丛;穿透雨;茎流;冠层截留;天童
Title: Study on rainfall partitioning in evergreen broad-leaved forest shrub in Tiantong, Zhejiang
Author: SHEN Huitao, YOU Wenhui
Organization: School of Resources and Environment Science, East China Normal University
Abstract: It is important to study the rainfall partitioning of vegetation to understand the hydrological functions of forest ecosystems. The rainfall redistribution of evergreen broad-leaved forest shrub in Tiantong National Forest Park was studied by permanent plot method. The results showed that the amount of rainfall outside the forest was 1 384.4 mm, and the throughfall, stemflow and canopy interception accounted for 65.4%, 9.2% and 25.4% of total rainfall, respectively. When the rainfall outside the forest was more than 3.3 mm, throughfall and stemflow would happen. The throughfall, stemflow and canopy interception had highly significant linear positive correlation with rainfall (P<0.01). However, the throughfall rate was correlated with precipitation amount by logarithm, and canopy interception rate had power relationship with rainfall. Coefficient of variations decreased along the increasing amount of rainfall in shrub. The number of gauges required to hold the standard errors of 0.05 and 0.1 were calculated. When the rainfall decreased, it was required to increase the number of throughfall holding devices for improving the representativeness of the observation data.
Key words: forest hydrology; evergreen broad-leaved forest shrub; throughfall; stemflow; canopy interception; Tiantong
发表期数: 2010年9月第18期
引用格式: 沈会涛,由文辉. 浙江天童常绿阔叶林灌丛降雨再分配研究[J]. 中国科技论文在线精品论文,2010,3(18):1919-1928.
 
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