Spatio-temporal change characteristics of PCD and PCP in Guangdong Beijiang river basin
- Article
- Figures
- Metrics
- Preview PDF
- Reference
- Related
- Cited by
- Materials
Abstract:
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), this paper studied the intra-annual inhomogeneous distribution characteristics of the precipitation in the basin by analyzing the spatial distribution of the multi-year mean values, variation trend, correlation with annual precipitation, and wet-year and dry-year composite values of PCD and PCP. The results are as follows: 1) PCD generally decreased from south to north; PCP was earlier in most of the north-central basin, but relatively later in the southern basin. 2) Annual precipitation would increase as PCD decreased in most of the basin; as PCP delayed, annual precipitation in the southern basin would decrease but that in the northern basin would increase. 3) As the Mann-Kendall test showed, the PCD and PCP in the basin were mainly on the rise, but not in a significant manner. 4) The spatial distribution of PCD in wet years was similar to that in dry years, but the PCD of dry years was higher. The PCPs in wet years were much more varied than those in dry years. On average, the PCP in wet years lagged about 20 days behind that in dry years.
Keywords:
Project Supported:
Clc Number:
Mobile website
® 2024 All Rights Reserved
冀公网安备13010502002656号
冀公网安备13010502002656号