การพัฒนาดัชนีความแห้งแล้งเรอเนสซองซ์สำหรับเตือนภัยแล้งประเทศไทย

Abstract

According to Thailand is located in the tropical region, it is influenced by the monsoon. The major water problems which faced often are flood and drought. Even though Thai government was attempted to solve these problems by constructing the water resources infrastructure and supplying water to irrigated agricultural areas. However, it was remained encountering drought prone area especially rainfed agriculture area. One of the soft side or non-infrastructure measurement can utilize for avoiding agricultural drought situation is warning the farmer by using drought indicator. This study aims to develop and apply the reconnaissance drought index (RDI) for identify the drought situation in term of severity and spatial. The study is used the observed rainfall data to compute the indice, and then compare this indice with observed rainfall data to find the corresponding and performance. The results show this RDI can be applied to Thai drought monitoring with a good correlation (0.52-0.64) and identify the spatial drought in overall of Thailand. From this RDI map indicates that the north east region of Thailand is most severe drought prone area, north and central region are second, respectively.