Climate Change Impact on Groundwater Droughts

Many Asian countries are among the highest users of groundwater for irrigation in the world. Groundwater uses in irrigation are still increasing both in absolute terms and in the percentage of total irrigation, especially in densely populated Asian countries. Therefore, the impacts of climate change and unsustainable human interventions on groundwater-based irrigation systems were assessed in the northwestern districts of Bangladesh. An ensemble of general circulation models (GCMs) of the Coupled Model Intercomparison Project Phase 5 (CMIP5) was used for downscaling and projection of rainfall and temperature under different representative concentration pathway (RCP) scenarios. Support vector machine and quantile mapping approach were used for the development of downscaling models and to remove biases in GCMs, respectively. Results showed an annual…