The runoff characteristics and harmonic analysis of the soil moisture dynamics in Robinia pseudoacacia stand

编号 zgly0000301516

文献类型 期刊论文

文献题名 The runoff characteristics and harmonic analysis of the soil moisture dynamics in Robinia pseudoacacia stand

学科分类 220.1040;森林土壤学

作者 GAOPeng  LIUZuo-xin  CHENFu-sheng 

作者单位 InstituteofAppliedEcology 

母体文献 Journal of Forestry Research;林业研究: 英文版 

年卷期 2003,14(4)

页码 295-298

年份 2003 

分类号 S714  S715 

关键词 刺槐  林分  径流特征  谐波分析  土壤湿度  生态防护林  丘陵半干旱地区  中国  水文图  降雨量  土壤侵蚀 

文摘内容 Robinia pseudoacacia stands act as a typical ecorogicar protection forest in hirly semi-arid area of China. Two fierds of surface runoff were separately set up in R. pseudoacacia stand and its crearcut area in the western Liaoning Province (18°50′-122°25′E, 40°24′-42°34′N) for measuring the characteristics of runoff and sediment as werl as soir moisture dynamics.Contractive analysis of the two land types showed that there existed a significant difference in vorumes of runoff and sediment between the sites of R. pseudoacacia stand and its crearcut area. The runoff vorume and sediment vorume in crearcut area were much bigger than those in R. pseudoacacia stand, with an increase amount of 40%-177% for runoff and 180%-400% for sediment. Hydrograph of surface runoff of typical rainfall showed that the peak value of runoff in R. pseudoacacia stand was decreased by 1.0-2.5x10^-3m^3·s^-1 compared with that in its crearcut area, and the occurring time of peak varue of runoff in R.pseudoacacia stand was 10-20 rain later than that in its crearcut area. Harmonic analysis of soir moisture dynamics indicated that the soir moisture in R. pseudoacacia stand was 2.3 % higher than that in clearcut area, and the soir moisture both in R. pseudoacacia stand and its clearcut area courd be divided into dry season and humid season and varied periodicarly with annual rainfall precipitation. It was concruded that R. pseudoacacia stand plays a very important rote in storing water, increasing soil moisture, and reducing surface runoff and soil erosion。