干旱区生态环境知识资源中心(Arid): 祁连山典型小流域降水特征及其对径流的影响

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	祁连山典型小流域降水特征及其对径流的影响
其他题名	The Characteristics of Precipitation and Its Effects on Runoff in a Small Typical Catchment of Qilian Mountains
	张立杰; 赵文智; 何志斌; 胡广录
ISSN	1000-0240
出版年	2008
卷号	30 期号:5 页码:776-782
中文摘要	研究了祁连山排露沟流域降水特征及对径流的影响．结果表明：降水的季节性强且分配不均匀，存在明显的干季（11月至翌年4月）和雨季（5-10月）之分；排露沟雨季降水占全年降水量的88％，占全年降水频数的70％；干季降水仅占全年的降水量12％，占全年降水频数的30％．降水事件主要以0～5mm的降水为主，占全年降水事件的78．8％，占全年降水量的30％；0～10d的降水间隔期出现的频率高达86．1％，占全年无降水期的55．5％．降水受海拔高度的影响明显，沿海拔梯度呈先增后减的趋势，降水的峰值出现在海拔3400m的区域．径流受降水的影响，主要集中在雨季，占全年的95．6％，干季径流仅占4．4％．径流与日降水、旬降水及其雨季月降水显著相关，其复相关系数均〈0．7．径流主要受降水量和前期降水的影响，对于前期无降水基础、雨量〈20mm降水过程，径流变化迟缓，而对于前期有一定降水基础，雨量〉25mm的降水过程，径流变化大．
英文摘要	Precipitation is one of the key factors for hydrology and influences the runoff producing of a mountain ecosystem in arid and semiarid areas. Analyzing the characteristics of precipitation and its effects on runoff in the recent years in Pailugou catchment of Qilian Mountains reveals： 1）Precipitation exhibits a high seasonality, with an irregular distribution, There are two distinct seasons, a rainy season （from May to October） and a dry season （from November to April of the next year）. The percentage of precipitation and its frequency are 88% and 70% in the rain season and 12% and 30% in the dry season, respectively. 2） On average, 78.8% of all the precipitation events and 30% of the annual precipitation are ≤5mm, and 55.5% of annual dry period and 86.1% of dry day＇s frequency of different length are 410 days. 3） Under the effects of altitude, the precipitation from 2600 m to 3 400 m increases, and then decreases with altitude, with a maximum at the altitude of 3 400 mm. 4） Runoff is mainly controlled by precipitation and concentrated in the rainy season. The percentage of runoff is 95.6% in the rain season and 4.4% in the dry season. 5） The relationships between runoff and daily precipitation, ten-day precipitation and monthly precipitation in the rain season are evident （R~2=0.272, 0.642, 0.569）. 6） Runoff is mainly dependent on precipitation size and preceding precipitation process, and the runoff has a gently variance with precipitation below 20 mm without preceding precipitation; There is a high variance with a preceding precipitation over 25 mm.
中文关键词	祁连山排露沟 ; 小流域 ; 降水特征 ; 径流
英文关键词	Qilian Mountain precipitation runoff small catchment
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:3412563
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/222032
作者单位	中国科学院寒区旱区环境与工程研究所临泽内陆河流域综合研究站寒旱区流域水文及应用生态实验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	张立杰,赵文智,何志斌,等. 祁连山典型小流域降水特征及其对径流的影响[J]. 中国科学院西北生态环境资源研究院,2008,30(5):776-782.
APA	张立杰,赵文智,何志斌,&胡广录.(2008).祁连山典型小流域降水特征及其对径流的影响.,30(5),776-782.
MLA	张立杰,et al."祁连山典型小流域降水特征及其对径流的影响".30.5(2008):776-782.