摘要
森林涵养水源、保持水土和净化水质的有益作用愈来愈引起人们的重视。祁连山水源涵养林是河西商品粮基地建设的基础,是经济建设的保障,是河西人民赖以生存的命脉。本文宗旨是探讨森林涵养水源的机理,筛选涵养水源功能最佳的森林生态系统,为祁连山水源涵养林的保护、发展和综合利用提供科学依据。
In this paper, the combined effects of forest for conservation of water source in the Qilian Mountains have been studied by fixed position observation method of forest ecological system. The results indicate that the Picea crassifolia forest is the best ecological system of water conservation forest over the Qilian Mountaions. Its mechanism for conservation of water supply are given as follows canopy can slow the raindrop splash down to the surface of soil and intercept 25.4 per Cent precipitation, the litter of forest soil is thick;the noncapillary porosity is high, forest soil structure is good, all precipitation are detained in forest soil, the surface runoff does not happen, and it can be decreased by forest vegetation. The forest vegetation can also cut down the foold peak and prolong the runoff time, which plays a role of suppling more water in dry season.
出处
《林业科学》
EI
CAS
CSCD
北大核心
1992年第6期544-548,共5页
Scientia Silvae Sinicae
基金
林业部"七五"重点资助
关键词
水源涵养林
水文效应
定位研究
Water conservation forest
Hydrologic effect
Fixed position research
