摘要
利用2011年湖南会同定位观测站第Ⅲ集水区实测数据,研究了第2代杉木人工林的降水过程与径流规律。结果表明:2011年年总降水量为1 071.1 mm,净降水量为594.15 mm,降水次数116次,其中4～8月份的降水次数占总降水次数的39.7%,降水量占总降水量的66.3%。2011年集水区形成总径流量为243.52 mm,地表径流1.98 mm,地下径流241.54 mm,地表径流出现在4、5、6三个月份,4月份地表径流值最大为1.11mm。1月份的地表径流系数及地下径流系数均最大,地下径流、地表径流变化趋势和降水量变化趋势相似,而径流的形成相对降水事件有明显滞后性。
By using the measured data at the Ⅲ watershed in Huitong Positioning Observation Station of Hunan province in 2011,the precipitation process and runoff rules of the 2nd generation Chinese fir plantation were investigated.The results show that in 2011,the annual total rainfall was 1071.1 mm,the net precipitation was 594.15 mm,the rainfall times was 116;the frequency between April and August was 39.7% of total times,and the rainfall was 66.3% of annual rainfall;the total runoff for watershed in 2011 was 243.52 mm,the surface runoff was 1.98 mm and the underground runoff was 241.54 mm,the surface runoff appeared in April,May and June,and the April had the max value of 1.11 mm;the surface and underground runoff coefficients in January were the biggest,the trends were similar with the rainfall,but the runoff’s formation lagged far behind of relative rainfall events.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2013年第6期108-112,共5页
Journal of Central South University of Forestry & Technology
基金
林业公益性行业科研专项"典型森林植被对水资源形成过程的调控研究"(201104005)
关键词
第2代杉木人工林
降水过程
径流规律
湖南会同
second generation Chinese fir plantation
precipitation process
runoff rules
Huitong county of Hunan province
