WANG Chun-lin,DONG Yong-chun,LI Chun-mei,HUANG Zhen-zhu,HE Jian. Guangdong Drought Daily Dynamic Simulation and Evaluation Based on GIS[J]. Journal of South China Agricultural University, 2006, 27(2): 20-24. DOI: 10.7671/j.issn.1001-411X.2006.02.006
Citation:
WANG Chun-lin,DONG Yong-chun,LI Chun-mei,HUANG Zhen-zhu,HE Jian. Guangdong Drought Daily Dynamic Simulation and Evaluation Based on GIS[J]. Journal of South China Agricultural University, 2006, 27(2): 20-24. DOI: 10.7671/j.issn.1001-411X.2006.02.006
WANG Chun-lin,DONG Yong-chun,LI Chun-mei,HUANG Zhen-zhu,HE Jian. Guangdong Drought Daily Dynamic Simulation and Evaluation Based on GIS[J]. Journal of South China Agricultural University, 2006, 27(2): 20-24. DOI: 10.7671/j.issn.1001-411X.2006.02.006
Citation:
WANG Chun-lin,DONG Yong-chun,LI Chun-mei,HUANG Zhen-zhu,HE Jian. Guangdong Drought Daily Dynamic Simulation and Evaluation Based on GIS[J]. Journal of South China Agricultural University, 2006, 27(2): 20-24. DOI: 10.7671/j.issn.1001-411X.2006.02.006
1. South China Batanical Garden,Chinese Academy of Science,Guangzhou 510650,China; 2. Guangdong Climate and Agrometeorology Center, Guangzhou 510080, China; 3. Guangzhou International Specialised Weather Services, Guangzhou 510080, China
According to the concept of soil-moisture-balance in Palmer-drought-model,daily drought index(DDI) is defined by available water content(AWC) below level soil.AWC was simulated day by day using daily data of temperature and rainfall. Based on GIS technique and geographic correction model with 5 environmental factors of longitude,latitude,height above the level,grade and slope of terrain, drought spatial distribution with relative high resolution of 1 km was made from scatter data of DDI of 86 stations,which could reflect the effect of terrain factors to drought distribution with more detail.Combined land data,an operation system was developed to monitor and evaluate the occurrence,development,severity degree and distribution of the drought dynamically,and to provide decision-making and evaluation for manmade-rainfall operation.
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