嘉陵江流域降水及径流演变规律分析 | |
白桦 ; 穆兴民 ; 高鹏 ; 王飞 | |
刊名 | 水土保持研究
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2012 | |
卷号 | 19期号:01页码:102-106 |
关键词 | 演变规律 :variation 降水 precipitation 径流 streamflow 嘉陵江 Jialingjiang River Basin 人类活动 human activity |
其他题名 | Analysis on Spatio-temporal Variation of Precipitation and Streamflow |
中文摘要 | 流域降水与径流演变规律的异同性,可有效表征人类活动对流域径流的影响。基于嘉陵江流域1958—2008年水文、气象资料,探寻流域年降水量、年径流量的空间分布规律,采用经验正交函数和时间序列分析法,研究年降水量、降水量年内分配指数和年径流量的演变规律,对比演变规律的同步及异步变化特征。结果表明:年降水量自流域东南向西北递减,年径流深分别于涪江、渠江上游和流域北部、涪江中游、流域中游干流段出现相对高值和低值。流域年降水量、降水量年内分配未呈现显著变化趋势,无突变点,把口站北碚站年径流量下降趋势明显,于1990年产生突变;年降水量和年径流量主周期一致,均为35a和21a,但主周期显著程度不同;年降水量和年径流量于2002—2008年丰枯状态不同,径流相对于降水呈现强减少趋势。流域自然条件和水利水保措施、城市化等人类活动造成降水与径流主周期显著程度的差异,以及降水与径流趋势性、突变性及阶段性变化的不同步。 |
英文摘要 | The differences between precipitation and streamflow can effectively represent the impact of human activities on changes of streamflow in a catchment.This study applies EOF and time series analysis method to investigate spatio-temporal variation of streamflow and precipitation based on long term hydrol-meteorological data in the Jialingjiang River Basin from 1958to 2008.The results indicate that(1)the precipitation decreased from the southeast to the northwest in the basin and the runoff depth showed basically consistent gradient with precipitation;(2)Annual precipitation and its distribution indices do not present significant/ evident trends and changing points.However,annual streamflow at Beibei station decreased significantly at 95%confidence level,and had a changing point in 1990.The wavelet analysis showed that the annual precipitation and streamflow had same periodical features(35and 21years).The annual streamflow showed relative drier condition compared with annual precipitation during 2002—2008.It is concluded that the natural condition,water conservation project and urbanization lead to differences of significance level between precipitation and runoff,as well as the temporal trend and changing point in the Jialingjiang River Basin. |
语种 | 中文 |
公开日期 | 2014-06-30 |
内容类型 | 期刊论文 |
源URL | [http://ir.iswc.ac.cn/handle/361005/5373] ![]() |
专题 | 水土保持研究所_水保所知识产出(1956-2013) |
推荐引用方式 GB/T 7714 | 白桦,穆兴民,高鹏,等. 嘉陵江流域降水及径流演变规律分析[J]. 水土保持研究,2012,19(01):102-106. |
APA | 白桦,穆兴民,高鹏,&王飞.(2012).嘉陵江流域降水及径流演变规律分析.水土保持研究,19(01),102-106. |
MLA | 白桦,et al."嘉陵江流域降水及径流演变规律分析".水土保持研究 19.01(2012):102-106. |
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