Extending a large-scale model to better represent water resources without increasing the model’s complexity
| Autor: | Helen Baron, Nathan Rickards, Helen Houghton-Carr, Manish K. Nema, Rishi Pathak, Gwyn Rees, Sekhar Muddu, Sharad K. Jain, Kaushal K. Garg, Prabhas K. Mishra, Thomas Thomas, Virginie Keller, Harry Dixon, Alexandra Kaelin, Robyn Horan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
environmental_sciences
Cauvery Geography Planning and Development Drainage basin hydrology reservoirs Aquatic Science Biochemistry Narmada Water balance Hydrology (agriculture) Streamflow groundwater TD201-500 Water Science and Technology geography geography.geographical_feature_category Baseflow Water supply for domestic and industrial purposes Hydraulic engineering Model complexity Water resources large-scale model Environmental science Hydrology Water resource management TC1-978 Scale model Groundwater |
| Zdroj: | Water Volume 13 Issue 21 Water, Vol 13, Iss 3067, p 3067 (2021) |
| DOI: | 10.3390/w13213067 |
| Popis: | A robust hydrological assessment is challenging in regions where human interference, within all aspects of the hydrological system, significantly alters the flow regime of rivers. The challenge was to extend a large-scale water resources model, GWAVA, to better represent water resources without increasing the model complexity. A groundwater and a regulated reservoir routine were incorporated into GWAVA using modifications of the existing AMBHAS-1D and Hanasaki methodologies, respectively. The groundwater routine can be varied in complexity when sufficient input data is available but fundamentally is driven by three input parameters. The reservoir routine was extended to account for the presence of large, regulated reservoirs using two calibratable parameters. The additional groundwater processes and reservoir regulation was tested in two highly anthropogenically influenced basins in India: the Cauvery and Narmada. The inclusion of the revised groundwater routine improved the simulation of streamflow in the headwater catchments and was successful in improving the representation of the baseflow component. In addition, the model was able to produce a time series of daily groundwater levels, recharge to groundwater and groundwater abstraction. The regulated reservoir routine improved the simulation of streamflow in catchments downstream of major reservoirs, where the streamflow was largely reflective of reservoir releases, when calibrated using downstream observed streamflow records. The model was able to provide a more robust representation of the annual volume and daily outflow released from the major reservoirs and simulate the major reservoir storages adequately. The addition of one-dimensional groundwater processes and a regulated reservoir routine proved successful in improving the model performance and traceability of water balance components, without excessively increasing the model complexity and input data requirements. |
| Databáze: | OpenAIRE |
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