地理学报(英文版) ›› 2016, Vol. 26 ›› Issue (6): 673-693.doi: 10.1007/s11442-016-1292-1

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  • 收稿日期:2015-10-08 接受日期:2015-11-15 出版日期:2016-06-15 发布日期:2016-06-15

A graded index for evaluating precipitation heterogeneity in China

Yonglin LIU1(), Junping YAN1,*(), Minyi CEN1,2, Qunsheng FANG3, Zhengyao LIU1, Yingjie LI1   

  1. 1. Tourism and Environment College, Shaanxi Normal University, Xi’an 710119, China
    2. Department of Health Geography, Shaanxi Normal University, Xi’an 710119, China
    3. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610000, China
  • Received:2015-10-08 Accepted:2015-11-15 Online:2016-06-15 Published:2016-06-15
  • Contact: Junping YAN E-mail:yorlinliu@163.com;yanjp@snnu.edu.cn
  • About author:

    Author: Liu Yonglin (1989-), specialized in natural disaster prevention and control. E-mail: yorlinliu@163.com

  • Supported by:
    National Natural Science Foundation of China, No.41171090;National Social Science Foundation of China, No.14AZD094, No.14XSK019

关键词: heterogeneity, precipitation concentration degree, evaluation index, comprehensive evaluation, China

Abstract:

Precipitation heterogeneity has a nontrivial influence on human life. Many studies have analyzed precipitation heterogeneity but none have proposed a systematic graded index for its evaluation, and therefore, its true characteristics have not been expressed. After comparisons of various methods, the precipitation concentration degree (PCD) method was selected to study precipitation heterogeneity. In addition to the PCD, normal distribution functions, cumulative frequencies, and percentiles were used to establish a graded index for evaluating precipitation heterogeneity. A comprehensive evaluation of precipitation heterogeneity was performed, and its spatiotemporal variation in China from 1960 to 2013 was analyzed. The results indicated that (1) seven categories of precipitation heterogeneity were identified (high centralization, moderate centralization, mild centralization, normal, mild dispersion, moderate dispersion, and high dispersion) and (2) during the study period, the precipitation in more parts of China tended to be normal or dispersed, which is beneficial to human activities.

Key words: heterogeneity, precipitation concentration degree, evaluation index, comprehensive evaluation, China