Assessment of Drought Severity and Vulnerability in the Lam Phaniang River Basin, Thailand

The Lam Phaniang River Basin is one of the areas in Northeast Thailand that experiences persistent drought almost every year. Therefore, this study was focused on assessment severity and vulnerability Basin. evaluation based Drought Hazard Index (DHI), which derived from Standardized Precipitation-Evapotranspiration (SPEI) calculated for 3-month (short-term), 12-month (intermediate-term), 24-month (long-term) periods. assessed by Vulnerability (DVI), relied water shortage, demand, runoff WEAP model, Gross Provincial Product (GPP) data. A risk map generated multiplying DHI DVI indices, level then defined afterwards. CNRM-CM5, EC-EARTH, NorESM1-M global climate simulations, TerrSet software were used to evaluate potential impacts future under RCPs 4.5 8.5, land use during 2021–2100, respectively. main findings compared baseline (2000–2017) revealed average results rainfall, maximum minimum temperatures expected increase 1.41 mm, 0.015 °C/year 0.019 °C/year, respectively, RCP 2.72 0.034 0.044 8.5. During 2061–2080 annual demand shortage projected decrease a 31.81% 51.61%, Obviously, Basin, upper lower parts mainly dominated low moderate levels at all time scales Focusing central part, 2021–2040, very high intermediate- long-term droughts 8.5 dominated, occurred 2041–2060. From 2061 2080, scales, highest identified 4.5, while found 2081–2100, region be Eventually, obtained will enable stakeholders formulate better proactive monitoring, so preparedness, adaptation, resilience can strengthened.