Published Paper Details:

Present study has been carried out to determine the surface water discharge volume for entire India using the fundamental water budget equation. Population growth and economic development have impacted the capacity of water resources to meet demands in a number of arid countries. As far as India is concerned, irregular rainfall, high rate of population growth and unscientific/non sustainable agricultural practices are resulting in a dramatic depletion of groundwater resources. The components of the water budget are obtained from documented information and remote sensing data, using Gravity Recovery and Climate Experiment (GRACE) satellites to estimate changes in terrestrial water storage (TWS) and GIOVANNI (Geospatial Interactive Online Visualization and analysis Infrastructure) visualization interface, MODIS (Moderate resolution Imaging Spectroradiometer) satellite data to obtain precipitation (PPT) and evapotranspiration (ET) respectively. All thematic maps that influence water budgeting were processed and statistically analysed in QGIS. This study was conducted for the year 2021 and divided into pre and post monsoon season. The result shows major variations in the approximate seasonal discharge (in BCM) for both the seasons. Thus, the above analysis clearly demonstrated the capabilities of Remote Sensing and GIS technique in calculating the seasonal water budgeting. Recommendations for further research of the terrestrial water monitoring based on GRACE data are also suggested.