JOURNAL OF NATURAL RESOURCES ›› 2015, Vol. 30 ›› Issue (11): 1896-1909.doi: 10.11849/zrzyxb.2015.11.010

• Resource Evaluation • Previous Articles     Next Articles

Spatial and Temporal Variation of Precipitation in Weihe River Basin from 1965 to 2013

ZHAO An-zhou1, 2, ZHU Xiu-fang1, LIU Xian-feng1, PAN Yao-zhong1   

  1. 1. a.State Key Laboratory of Earth Surface Processes and Resource Ecology,b. College of Resources Science & Technology, Beijing Normal University, Beijing 100875, China;
    2. College of Resources, Hebei University of Engineering, Handan 056038, China
  • Received:2014-11-04 Revised:2015-01-23 Online:2015-11-14 Published:2015-11-14

Abstract:

Linear regression, the decomposition of Empirical Orthogonal Function (EOF), Mann-Kendall Test and Pettitt Test are used to analyze the spatial-temporal distribution characteristics of precipitation in the Weihe River Basin in 49 years based on the data from 1965 to 2013 at 22 meteorological stations in the Weihe River Basin and nearby. The results showed: 1) From the view of temporal variation, the changes of annual and seasonal precipitation were not significant at the level of 0.05 but the precipitation in spring which showed an obvious decreasing trend (-6.23 mm/10 a). Meantime, there was no obvious abrupt change of annual and seasonal precipitations but the spring of 1991 on basis of mutation test. 2) Precipitation in the Weihe River Basin was unevenly distributed, decreasing spatially from southeast to northwest, and the decreasing trend in the upstream was more obvious than that in the midstream. 3) The EOF decomposition indicated that the spatial distribution of annual and seasonal precipitation in the Weihe River Basin are overall coherent, and there was an opposite phase in the direction of southeast-northwest.

CLC Number: 

  • P426.6