Meteorology and Atmospheric Physics

, Volume 128, Issue 2, pp 167–179 | Cite as

Spatial and temporal characteristics of rainfall across Ganjiang River Basin in China

  • Yang Xiao
  • Xiang Zhang
  • Hui Wan
  • Yeqiao Wang
  • Cheng Liu
  • Jun Xia
Original Paper

Abstract

The hydrological variations of Ganjiang River Basin have significant influence on the ecological environment of Poyang Lake, which is one of the largest freshwater lake and wetland in the world. This study analyzed the spatial and temporal characteristics of rainfall across Ganjiang River Basin. The analyses include annual total rainfall amount (ATRA), annual total rainy day (ATRD) and annual mean daily rainfall intensity (AMDRI). To detect changes in the hydrological trends, data from 19 rainfall stations from 1953 to 2013 were used in the analyses. First, quality control and homogeneity detection was carried out to examine the annual rainfall series. Second, the spatial correlation analysis was used to identify the spatial relationship among the measurements from different stations. Finally, the statistics of coefficient of variation (CV) and average were used to analyze the interannual variation trend. The modified Mann–Kendall (MMK) trend test method was used to detect the temporal characteristics of rainfall. The results include: (1) Some outliers were detected and corrected. (2) The correlation of ATRA and ATRD series of all the stations had lower spatial variability while the AMDRI series of all the stations had higher spatial variability. On the other hand, the ATRA, ATRD and AMDRI series of single stations show similar spatial variability and the influencing radius of the rainfall events was less than 50 km. (3) the rainfall at the northern and southern parts of the basin had smaller CV. Further, by applying the MMK test method to the ATRA, ATRD, and AMDRI series, the ATRA series has an increasing trend which is opposite to that of the ATRD series. The increasing trend in the ATRA series also led to the increasing trend in the AMDRI series. These stations are mainly in central and northern parts of the basin which are more likely to experience droughts and floods. Thus, for the central and northern parts of the basin, they should receive particular attention on the prevention and treatment of droughts and floods.

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Copyright information

© Springer-Verlag Wien 2015

Authors and Affiliations

  • Yang Xiao
    • 1
    • 2
  • Xiang Zhang
    • 1
    • 2
  • Hui Wan
    • 1
    • 2
  • Yeqiao Wang
    • 1
    • 2
    • 3
  • Cheng Liu
    • 1
    • 2
  • Jun Xia
    • 1
    • 2
  1. 1.State Key Laboratory of Water Resources and Hydropower Engineering ScienceWuhan UniversityWuhanChina
  2. 2.Key Laboratory of Poyang Lake Wetland and Watershed Research, Ministry of EducationJiangxi Normal UniversityNanchangChina
  3. 3.Department of Natural Resources ScienceUniversity of Rhode IslandKingstonUSA

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