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Hydrological model-based streamflow reconstruction for Indian sub-continental river basins, 1951-2021
Dipesh Singh Chuphal1, Vimal Mishra2,3
1Civil Engineering, Indian Institute of Technology (IIT) Gandhinagar, Gandhinagar, India.
Scientific Data
|October 18, 2023
Summary
Researchers developed a hydrological model to simulate monthly streamflow for Indian river basins from 1951-2021. This long-term streamflow data reveals critical trends for water management and climate adaptation in the region.
Area of Science:
- Hydrology
- Climate Science
- Water Resource Management
Background:
- Streamflow is crucial for water resources, climate analysis, and ecosystems.
- Long-term streamflow data is scarce for Indian Subcontinental (ISC) river basins.
- Accurate streamflow data is essential for effective water management and climate change adaptation.
Purpose of the Study:
- To develop a comprehensive, long-term (1951-2021) monthly streamflow dataset for ISC river basins.
- To assess the historical variability and trends in streamflow across the region.
- To provide a valuable resource for water management and climate change adaptation strategies.
Main Methods:
- Utilized meteorological observations and advanced hydrological and river routing models.
- Employed a high-resolution vector-based routing model (mizuRoute) for streamflow simulation.
- Validated model performance using observed flow data, achieving R² and NSE > 0.70 for over 60% of stations.
Main Results:
- Generated a high-resolution monthly streamflow dataset for 9579 river reaches in the ISC.
- Model simulations demonstrated good agreement with observed streamflow data.
- Analyzed streamflow variability, identifying significant declines in the Ganga basin and increases in western India and the Indus basin.
Conclusions:
- The developed streamflow dataset provides crucial insights into hydrological changes in the ISC.
- Long-term streamflow trends highlight regional differences in water availability.
- The dataset is vital for informed water resource planning and climate change adaptation in the Indian sub-continent.
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