Monitoring the Spatio-temporal Process of Severe Droughts in the Pearl River Basin

doi:10.11867/j.issn.1001-8166.2019.10.1050

Advances in Earth Science ›› 2019, Vol. 34 ›› Issue (10): 1050-1059. doi: 10.11867/j.issn.1001-8166.2019.10.1050

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Monitoring the Spatio-temporal Process of Severe Droughts in the Pearl River Basin

Qiang Huang ^1, ²( ),Zishen Chen ³( ),Changyuan Tang ^2, ³,Shaofeng Li ¹

1. School of Construction and Environmental Engineering, Shenzhen Polychnic, Shenzhen 518055, China
2. School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
3. School of Geography and Planning, Sun Yat-sen University, Guangzhou 510275, China

Received:2019-06-30 Revised:2019-08-25 Online:2019-10-10 Published:2019-12-05
Contact: Zishen Chen E-mail:huangq52@szpt.edu.cn;eesczs@mail.sysu.edu.cn
About author:Huang Qiang （1989-）， male， Qingyuan City， Guangdong Province， Lecturer. Research areas include water disaster risk and environmental isotope. E-mail: huangq52@szpt.edu.cn
Supported by:
the National Natural Science Foundation of China “Migration and transformation of phosphorus in soil groundwater of riverside wetland in intensive agricultural area of Pearl River Delta and its influencing factors”(41877470);The Science and Technology Plan Project of Shenzhen “Study on the migration and inactivation of Giardia and Cryptosporidium in water supply system”(JCYJ20160226092135176)

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Qiang Huang,Zishen Chen,Changyuan Tang,Shaofeng Li. Monitoring the Spatio-temporal Process of Severe Droughts in the Pearl River Basin[J]. Advances in Earth Science, 2019, 34(10): 1050-1059.

The 0.5°×0.5° grid dataset issued by the China National Meteorological Administration was used to study the spatio-temporal process of the two severe droughts in 1963 and 2009 for the Pearl River Basin. Two effective drought indexes named Joint Drought Index (JDI) and Standardized Weighted Average Precipitation (SWAP) were used as indicators for quantitative description of drought. Better considering the spatial property of drought, the results derived from the JDI and SWAP calculated by the grid dataset can reflect the whole process of drought occurrence, development, peak and recession. The monitoring results of JDI represent the average state of drought in a month, which can directly reflect the overall drought process, while the results of SWAP provide a more clear picture for drought monitoring on a short time scale, especially in detecting the beginning, peak and termination time of drought. Both the results of JDI and SWAP are consistent with the actual droughts recorded in history. Therefore, JDI and SWAP can be used together as ideal indicators for drought monitoring in the Pearl River Basin.

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