Uncertainty in Hydrologic response of a river Basin in India to Changed Climate Scenario Jana Sambaran, Dutta Sourav, Das Subhasish, Roy Debasri School of Water Resources Engineering, Jadavpur University, India Online published on 22 April, 2019. Abstract Hydrological processes and in turn, water availability would be affected by changing climate. Thus assessment of this effect is important for development of water resource. This assessment process, in turn, involves some uncertainties including that associated with various methods of computing potential evapotranspiration. The basin of Subarnarekha river of India is storehouse of mineral resources, and it possesses immense potentiality for mineral based industrialization. Framing of useful guideline for planners of water projects in this basin, considering increasing inter-sectoral demand of water and effect of changing climate is necessary. Development of a hydrologic model of a subbasin of the river Subarnarekha and simulation of effect of three methods for computing potential evapotranspiration (viz., Penman, Priestley-Taylor and Hargreaves) on basin hydrology for changed climate (output of the RCM, PRECIS (IITM, Pune, India)are being presented here. The deviations of projected values of PET compared to baseline values calculated by aforementioned methods were noted to vary significantly among themselves for certain months. Changes in values of projected flow (compared to baseline values) for aforementioned methods for computing PET were noted to display significant spread that is uncertainty for certain months. Top Keywords Climate change, Potential evapotranspiration methods, Hydrology, Uncertainty, Streamflow. Top |