An Analysis of Temporal and Spatial Variation of Rainfall in Huaihe Watershed above Bengbu in Recent 50 Years

ZHANG Ping, XIA Jun, ZOU Lei, MA xie-yi

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China Rural Water and Hydropower ›› 2017 ›› (3) : 1-8.

An Analysis of Temporal and Spatial Variation of Rainfall in Huaihe Watershed above Bengbu in Recent 50 Years

  • ZHANG Ping1,XIA Jun2,ZOU Lei3,MA xie-yi2
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Abstract

Based on the daily rainfall data of 55 years from 1956 to 2010 collected by 112 precipitation stations above Bengbu lock,the Mann-Kendall test and wavelet analysis are used to analyze the spatial-temporal variation in four water resource divisions. The results indicate thataverage annual rainfall in the northern part of the study area is higher than that in the southern part. The rainfall of the divisions is decreasingin addition to the part of the south of Wangbang Region and there is a trend of increase in the rainfall in the whole study area. The rainfall decrease in the north of the area above Wangjiaba has gone through the Mann-Kendall test,while the rainfall in the south of the area aboveWangjiaba is inclined to increase. As a result of the extreme precipitation in 2003,the UF curve shows that the trend of the rainfall in thesouth of the area above Wangjiaba is not significant in the whole study period. Although the cycle of the rainfall of the whole study area andthe four water resource divisions was different,there was a common oscillation cycle of about 6 year. The spatial scale had effect on the research results.

Key words

Huaihe watershed / water resource divisions / Mann-Kendall test / wavelet test

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ZHANG Ping, XIA Jun, ZOU Lei, MA xie-yi. An Analysis of Temporal and Spatial Variation of Rainfall in Huaihe Watershed above Bengbu in Recent 50 Years. China Rural Water and Hydropower. 2017, 0(3): 1-8

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