摘要: |
降水是河川径流的重要补给源,对流域径流分析和水资源开发利用研究有重要意义。本文以太子河流域为研究区,利用该流域资料相对完整、代表性强的28个雨量站1967-2016年的降水资料,采用Kendall秩次相关检验法和克里金空间插值法等多种数理统计方法分析了太子河流域降水的时间和空间变化特征。结果表明:从长序列趋势变化来看,近50年来,太子河流域年降水量、春秋季降水量呈微弱下降趋势,夏冬季降水量呈不显著的上升趋势;年降水量和四季降水量均未通过90%显著性水平下的Kendall趋势检验。从空间变化特征来看,整个流域降水量呈现从西北向东南递增的空间变化特征,流域西北部的年降水量在700mm以下,东南部多年平均降水量都在800mm以上;四季降水量空间分布与多年平均降水量的空间分布相似,尤其是降水量集中的夏季空间分布相似度更高。 |
关键词: 降水;太子河流域;时间变化;空间变化 |
DOI: |
分类号:P331 |
基金项目: |
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Temporal and spatial characteristics of precipitationin Taizi River Basin in recent 50 years |
Feng Xiaqing
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River and Reservoir Management Service Center of Liaoning Province Hydrology Bureau of Liaoning Province
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Abstract: |
Precipitation is important water resource supplied for the river runoff. The study on the precipitation characteristics has significance for the analysis of runoff and water resources development and utilization. In this paper, with precipitation series at 28 precipitation stations in the Taizi River Basin from 1967 to 2016, the precipitation characteristics were analyzed with Kendall test method and Kriging spatial interposition method. The results showed that the annual precipitation and four seasons precipitation failed the Kendall test at the 0.01 significant level. The tendencies of annual precipitation, spring and autumn precipitation reduction are insignificant in recent 50 years, summer and winter precipitation indicate indistinct increasing trend. The annual and seasonal precipitation increase from the northwest to the southeast in the Taizi River Basin. |
Key words: precipitation; Taizi River Basin; temporal variation; spatial variation |