摘要
从2009年1月到2011年12月,采用固定样地定位监测法,对漓江流域典型森林群落木荷Schima superba林降水特征及地表径流规律进行研究。结果表明:木荷林在雨季容易产生地表径流,但由于木荷林群落结构良好,地表径流系数仅为0.0167;木荷林地表径流平均滞后时间为70 min,最长滞后时间为330 min。地表径流的产生受前期降水和林地条件的影响,在前期降水较充分的情况下,4.3 mm的降水就能产生地表径流。地表径流量与降水量呈显著线型相关;降水强度对径流系数的影响也比较明显,降水强度越大径流系数越大。
By using long-term localization observation, characteristics of precipitation and its effects on surface runoff in typical forest community of Schima superba were monitored and studied in upper reaches of Lijiang river from January 2009 to December 201 I. The results show that surface runoff was easy to be yielded during rainy season, but runoff coefficient was only 0.016＂7 because of complicated structure of forest community. The average lag time of surface runoff was 70 minutes and the maximum value was 330 minutes. Surface runoff is mainly connected with antecedent precipitation and forestland condition. Runoff would be produced when rainfall was 4.3 mm for the early saturated rainfall. Surface runoff was positively correlated with precipitation, and the relationship between runoff and rainfall intensity was also obvious.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2012年第6期72-77,共6页
Journal of Central South University of Forestry & Technology
基金
国家自然科学基金项目"漓江上游森林群落结构与水文过程调控机理研究"(30860058)
国家科技支撑计划课题"漓江流域生态旅游资源可持续利用技术模式及示范"(2012BAC16B04)
广西科技攻关计划课题"漓江上游森林生态系统格局优化与可持续管理技术研究"(桂科攻1298006-3)
关键词
漓江
降水量
降水强度
地表径流
Liiiang river
precipitation
rainfall intensity
surface runoff
