Analysis of water balance components of a river sub-basin under future climate scenarios

Autor: Nagendra Reddy, Nagraj S. Patil, M. Nataraja
Rok vydání: 2021
Předmět:
Zdroj: Sustainable Water Resources Management. 7
ISSN: 2363-5045
2363-5037
DOI: 10.1007/s40899-021-00583-z
Popis: The study analyzed the future changes in the water balance components using a hydrological model, soil and water assessment tool, in the Ghataprabha river sub-basin, India, under two different climate scenarios. The model is calibrated and validated using the multi-site manual calibration technique. The model-simulated results show the increase in the monthly mean Indian summer monsoon rainfall by 0.79% and 4.14% under Representative Concentration Pathways 4.5 scenario in the early (2010–2039) and end (2069–2099) century, respectively, and also, 4.93% and 9.71% under Representative Concentration Pathways 8.5 scenario in the early and end century, respectively. As inferred from the studies, it was observed in the early century, for the Representative Concentration Pathways 4.5, a decreasing trend in the monthly mean streamflow and water yield, and an increasing trend in the evapotranspiration. While, for the Representative Concentration Pathways 8.5 scenario, an increasing trend was observed in the projected monthly mean streamflow, evapotranspiration, and water yield. During the end century, the increasing trend of monthly mean streamflow, evapotranspiration, and water yield was observed under both Representative Concentration Pathways 4.5 and 8.5 scenarios. It is reported that the projected results in the early century show a decreasing trend in the streamflow and water yield which may lead to the water stress conditions over the study area. The findings of the study suggest that the water balance components like precipitation, streamflow, water yield, and evapotranspiration were more susceptible to climate change over the study area during the study period.
Databáze: OpenAIRE
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