Impact of Wind Characteristics and Climate Change on Drought

Abstract

Standard precipitation index (SPI) is fundamental information for assessing situation of drought in a river basin. Usually, the SPI varies with physical characteristics of the basin and change of rainfall due to climate change. Hence, the main objectives of the present paper are (1) to assess impact of wind characteristics flowing across a catchment area on drought disasters and (2) to analyze trend of the drought for the considered basin. This study uses 35 years (1981 - 2015) of monthly rainfall data for 5 stations in the windward Nakhon Nayok Basin and 9 sites in the leeward Lam takong Area. Analysis results have shown that considered impact on the drought circumstance exists because the chances of facing the moderate and extreme droughts in the Nakhon Nayok Area are less than those in the other. Moreover, the results have further indicated that global warming does not significantly affect the soilmoisture . In the other hand, the reservoir drought for both areas are significantly affected by global warming