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Spatial and Temporal Variability in the Precipitation Concentration in the Upper Reaches of the Hongshui River Basin, Southwestern China
Joint Authors
Yan, Denghua
Xiao, Weihua
Zhou, Yuyan
Wang, Hao
Huang, Ya
Chen, Li-hua
Jiang, Da-chuan
Yang, Ming-zhi
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-19, 19 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-03-11
Country of Publication
Egypt
No. of Pages
19
Main Subjects
Abstract EN
The statistical characteristics of precipitation play important roles not only in flood and drought risk assessments but also in water resource management.
This paper implements a statistical analysis to study the spatial and temporal variability in precipitation in the upper reaches of the Hongshui River basin (UHRB), southwestern China, by analysing time series of daily precipitation from 18 weather stations during the period of 1959 to 2015.
To detect precipitation concentrations and the associated patterns, three indices, the precipitation concentration index (PCI), precipitation concentration degree (PCD), and precipitation concentration period (PCP), were used.
The relationships between the precipitation concentration indices (PCI, PCD, and PCP) and geographic variables (latitude, longitude, and elevation), large-scale atmospheric circulation indices, and summer monsoon indices were investigated to identify specific dependencies and spatial patterns in the precipitation distribution and concentration.
The results show that high PCI values were mainly observed in the northeastern portion of the basin, whereas low PCI values were mainly detected in the southwest.
The Mann-Kendall test results demonstrate that the majority of the UHRB is characterized by nonsignificant trends in the PCI, PCD, and PCP from 1959 to 2015.
The PCP results reveal that rainfall in the UHRB mainly occurs in summer months, and the rainy season arrives earlier in the eastern UHRB than in the western UHRB.
Additionally, the PCD results indicate that the rainfall in the western UHRB is more dispersed throughout the year than that in the eastern UHRB.
Compared with other geographical factors, longitude is the most important variable that governs the spatial distribution and variations in annual precipitation and the precipitation concentration indices.
Due to a combination of topography, the Indian subtropical high, and monsoon weakening, precipitation may be more concentrated in one period, especially in the eastern part of the basin, which increases the risk of drought.
American Psychological Association (APA)
Huang, Ya& Wang, Hao& Xiao, Weihua& Chen, Li-hua& Yan, Denghua& Zhou, Yuyan…[et al.]. 2018. Spatial and Temporal Variability in the Precipitation Concentration in the Upper Reaches of the Hongshui River Basin, Southwestern China. Advances in Meteorology،Vol. 2018, no. 2018, pp.1-19.
https://search.emarefa.net/detail/BIM-1118732
Modern Language Association (MLA)
Huang, Ya…[et al.]. Spatial and Temporal Variability in the Precipitation Concentration in the Upper Reaches of the Hongshui River Basin, Southwestern China. Advances in Meteorology No. 2018 (2018), pp.1-19.
https://search.emarefa.net/detail/BIM-1118732
American Medical Association (AMA)
Huang, Ya& Wang, Hao& Xiao, Weihua& Chen, Li-hua& Yan, Denghua& Zhou, Yuyan…[et al.]. Spatial and Temporal Variability in the Precipitation Concentration in the Upper Reaches of the Hongshui River Basin, Southwestern China. Advances in Meteorology. 2018. Vol. 2018, no. 2018, pp.1-19.
https://search.emarefa.net/detail/BIM-1118732
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1118732