Advancing hydrological modeling for detailed water budget assessment in Indian river basins: a high-resolution approach

Abstract

In recent years, there has been an increasing demand for enhanced hydrological modeling, monitoring and high-resolution data. The hydrological community has grappled with persistent challenges, notably the limited availability of observations at the required spatial and temporal resolution. The availability of high-resolution satellite-based, reanalysis, and ground-based observations has significantly improved compared to previous decades, unlocking new opportunities for detailed and precise analyses across various domains. Despite the profound importance of the high-resolution data, it has been lacking in the Indian region. This study addresses the gap by developing high-resolution (0.05°) data for precipitation and maximum and minimum temperatures for the South Asian region. Next, we employ hydrologic modelling frameworks (VIC) to simulate the hydrologic variables (Evapotranspiration, baseflow, surface flow, soil moisture, etc.). Subsequently, the study will extend to estimating water budgets, identifying trends, and analyzing changes at the sub-basin level. Additionally, a focus on climate extremes will provide insights into the taluka level in South Asia. The outcomes of this research are poised to offer valuable contributions to policymakers, governmental bodies, and researchers, facilitating improved water resource management.