SCIENTIA GEOGRAPHICA SINICA ›› 2015, Vol. 35 ›› Issue (4): 476-482.doi: 10.13249/j.cnki.sgs.2015.04.476

• Orginal Article • Previous Articles     Next Articles

Multi-scale Spatio-temporal Characteristics and Influence of Precipitation Variation in Zhujiang River Basin During the Last 50 Years

Yi-han TANG1,2, Xiao-hong CHEN1,2()   

  1. 1. Department of Water Resources and Environment, Sun Yat-sen University, Guangzhou, Guangdong 510275,China
    2. Key Laboratory of Water Cycle and Water Security in Southern China of Guangdong High Education Institute, Sun Yat-sen University, Guangzhou, Guangdong 510275,China
  • Received:2014-05-08 Revised:2014-08-18 Online:2015-04-20 Published:2015-04-20

Abstract:

Basing on daily precipitation data from 1959-2012 in 38 gauging stations in Zhujiang River Basin (PRB), we have adopted Kendall test and linear regression method in studying the spatio-temporal characteristics of multiple precipitation indexes as studied time series, conclusions are drawn as follows: 1) In PRB, annual precipitation decreases towards west and declines along time; RRB drops from center to surroundings and keeps an increasing trend in most part of the basin; 2) Precipitation is seasonal and moderately concentrated in June; PCI becomeseven in the whole basin while differences between FI6 values expands; 3) Threshold value of extreme rainfall descends from east to the west and jumps are found in 1960s and 1980s; volume of extreme rainfall with same recurrence interval comes to its peak in 21st century; 4) Four precipitation regions are divided as (a)Guangdong District, (b) north-central part of Guangxi District, (c) south-west of Guangxi District and (d) Yunnan-Guizhou District; flood prevention is crucial for aand b districts especially Pearl River Delta region, and water safety is major concern for c and d District.

Key words: Zhujiang River Basin, multi-scale, spatio-temporal variation in precipitation, precipitation index

CLC Number: 

  • TV122+2