Title :
Evolution characteristics analysis of meteorological drought based on GIS
Author :
Zhou, Ting ; Li, Chuanzhe ; Yu, Fuliang ; Chai, Zengkai
Author_Institution :
Dept. of Water Resources, China Inst. of Water Resources & Hydropower Res., Beijing, China
Abstract :
Based on 1977-2010 precipitation data of 38 weather stations in the Lancang-Mekong River basin, evolution characteristics of meteorological drought was analyzed using Standardized Precipitation Index (SPI) with the spatial analysis and statistics functions of Geographic Information System (GIS). The results show that drought intensify and occurrence area changed insignificantly in wet season. But in dry season, drought intensify and occurrence area have been decreasing significantly. Barycenter position of drought intensity and drought frequency in wet season changed southeastward, with both latitude and longitude changed no more than 1°. Barycenter position of drought intensity and drought frequency in dry season changed northwestward, with range of changes greater than that in wet season. For both drought intensify and drought frequency, the range of changes was greatest in recent 10 years.
Keywords :
geographic information systems; rain; rivers; AD 1977 to 2010; China; GIS technique; Lancang-Mekong River basin; barycenter position; drought frequency; drought intensity analysis; geographic information system; meteorological drought characteristics; precipitation data; spatial analysis; standardized precipitation index; statistical function; Geographic Information Systems; Geography; Indexes; Rivers; US Government agencies; Water resources; Yttrium; GIS; Lancang-Mekong River basin; SPI; evolution characteristics; meteorological drought;
Conference_Titel :
Remote Sensing, Environment and Transportation Engineering (RSETE), 2011 International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-9172-8
DOI :
10.1109/RSETE.2011.5964735
