Evaluation of Climate Change Impact And Groundwater Vulnerability Assessment In Rangpur District, Bangladesh

Abstract

Groundwater vulnerability assessment was carried out in Rangpur district due to climate change and with an aim to assess the climatic change evaluation and groundwater vulnerability. The climatic parameter such as rainfall and temperature were used to evaluate the changes of climate. Moisture index, drought hazard index, flood hazard index and groundwater vulnerability assessment were calculated following the Thornthwaite model (1948), Shahid and Behrawan (2008) and GIS based DRASTIC model. The analysis reveals that rainfall related flood hazards may increase over the years as the duration and magnitude of rainfall may increase. As temperature of Rangpur may change, so potential evaporation will change. Risk ranking revel that severity and frequency rainfall flood is higher than meteorological drought and the highest flood risk indicate moderate-to-high flood risk condition. The highest meteorological drought risk indicates drought risk condition sufficiently high. Groundwater level is declining at an alarming rate which causing the groundwater moderate vulnerable to high vulnerable condition.