Predicting dam‐related downstream geomorphic response with widely available stream gauge data
A case study of the Godavari River Basin, India
Bibliographic Data
| ID | 20153949 |
|---|---|
| Authors | Joy Sanyal (0000-0003-1849-1605, Department of Civil and Environmental Engineering Tokyo Institute of Technology Tokyo, corresponding author), Priyanka Dasgupta (0009-0000-6755-150X, Department of Geography Presidency University Kolkata), Shinjiro Kanae (0000-0002-3176-4957, Department of Civil and Environmental Engineering Tokyo Institute of Technology Tokyo) |
| Year | 2020 |
| Volume | 41 |
| Issue | 2 |
| Pages | 284-298 |
| Publication date | 2020-05-01 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Singapore Journal of Tropical Geography (JOURNAL) |
| Journal identifiers | ISSN: 0129-7619 • E-ISSN: 1467-9493 |
| Publisher | Wiley (PUBLISHER • GB) |
| DOI | 10.1111/sjtg.12323 |
| OpenAlex | W3026491155 |
| Language | EN |
| References cited | 30 |
Dam‐related downstream adjustments of riverbeds are normally investigated by analysing the trend in sediment supply and high flow events during the pre‐ and post‐dam periods. The required data for existing predictive models is not measured at river gauges, which limits the application of these tools. We derived the frequency of sediment‐transporting streamflow events (T*) and upstream sediment supply (S*) in the pre‐ and post‐dam periods with widely available gauged records and predicted changes in the downstream riverbed by adapting an existing model. Ten gauging stations in the Godavari River Basin, India, located downstream of dams, were chosen as study sites. Annually surveyed cross‐sections at each site validated the accuracy of the predicted dam‐related downstream changes. Then, a regression equation (R 2 = 0.75) was established between T*/S* (independent variable) and changes in the downstream bed elevation (dependent variable) for the Godavari Basin. We recommended that similar local empirical equations be formulated for larger river basins. Models of large‐scale rainfall‐runoff and sediment transport processes that can account for the influence of dams, such as the Soil & Water Assessment Tool, can be paired with the proposed regression equation to estimate dam‐related downstream erosion and deposition with globally available data
Deposition (geology) · Downstream (manufacturing) · Drainage basin · Erosion · Geography · Geomorphology · Geotechnical engineering · Hydrology (agriculture) · Sediment · Sediment transport · Streamflow · Structural basin · Surface runoff · Ecology · Environmental Science · Geology · Hydrology and Sediment Transport Processes · Hydrology and Watershed Management Studies · Soil erosion and sediment transport
| Citation velocity | historical |
|---|---|
| Highly cited | No |