Hydrological Characteristics of the Dominant Tree Species in the Water Source Area of Yuanyang Terrace
The research on hydrological characteristics of dominant tree species in the water source area of Yuanyang terrace is conducive to further revealing the water conservation function of forest.Using the methods of field investigation,sampling analysis and laboratory experiments,we investigated the litter reserves,holding water ability,interception capacity and water holding process of dominant tree species of Yuanyang terrace.The results showed that the total reserves of litter was 6.06～8.2 t/hm2,half-decomposed litter was more than un-decomposed litter;the total thickness of litter layer was 6.1～8.8 cm,thickness of the half-decomposed litter layer was greater than that of the un-decomposed layer;the natural water content of half-decomposed litter layer was significantly higher than that of the un-decomposed layer;the maximum water holding capacity of half-decomposed litter layer was greater than the maximum water holding capacity of un-decomposition litter,but the difference was not obvious,the maximum water holding rate of total litter ranged from 132.1％ to 247.3％;the effective interception amount of total litter was 2.07～8.01 t/hm2,of which the un-decomposed effective interception amount was greater than that of the half-decomposed layer;changes of water holding capacity and water absorption rate of litter during the period of 0～2 h was large,the curves of both water holding capacity and water absorption rate were relatively flat and the change was little after soaking 8 h;relationship between water holding capacity of litter and water immersion time could be described by logarithmic function,and relationship between water absorption rate and time could be described by power function.
Yuanyang terracelitterwater holding capacitythe amount of effective interceptionabsorption rate
国家科技期刊平台
NSTL
万方数据
维普
