Analysis on Change Characteristics of PCD and PCP in Beijiang River Basin

• 作者: Liu Zhanming
• 来源期刊: 气象与环境研究:英文版
• 学科: 地球科学
• 关键词: PRECIPITATION CONCENTRATION degree PRECIPITATION CONCENTRATION period Beijiang River basin INVERSE distance WEIGHTED INTERPOLATION
• 年，卷（期）: 2018,（6）
• 页码范围: 1-4
• 页数: 4页
• 分类号: P

摘要

Based on the daily precipitation data between 1965 and 2009 from 18 rainfall stations in Guangdong Beijiang River basin and the definitions of Precipitation Concentration Degree(PCD) and Precipitation Concentration Period(PCP),the inhomogeneous distribution characteristics of interannual precipitation were analyzed by introducing the spatial distribution of annual mean values,variable coefficients,correlation coefficients between annual precipitation,change trends and composite analysis. The results showed that(1) PCD mainly decreased from south to north in spatial distribution; PCP was earlier in most of north-central basin,but relatively later in southern basin.(2) Annual precipitation would increase if PCD decreased in most of river basin,and annual precipitation would decrease as PCP lagged in southern basin,but the change trend was the opposite in northern basin.(3) PCD and PCP mainly showed insignificant upward trend in the entire basin by Mann-Kendall test.