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Examining the downstream geomorphic impact of a large dam under climate change
- Source :
- CATENA. 196:104850
- Publication Year :
- 2021
- Publisher :
- Elsevier, 2021.
-
Abstract
- Long-term geomorphic evolution of rivers depends both on the amount of sediment supply and on the river’s ability to transport that sediment. Climate change is anticipated to change flow frequency distributions and sediment yield and could thus alter the geomorphic trajectory of many regulated rivers. We aim to examine the possible geomorphic response of the upper Godavari River, India, to climate change using two well-accepted metrics: the frequency of the sediment-transporting flows (T*) and the ratio of the sediment flux below and above a dam (S*). Soil and Water Assessment Tool (SWAT) was used to simulate streamflow and sediment yield in the basin. We calibrated and validated the model using SWAT-CUP for pre- (1971–75) and post-dam (1976–81) conditions downstream of Jayakwadi dam. The model performance was good (NS value > 0.6 for discharge and PBIAS < ± 10 for sediment) with low uncertainty (p-factor > 0.6 and r-factor
- Subjects :
- Hydrology
010504 meteorology & atmospheric sciences
Soil and Water Assessment Tool
DamsDownstream ErosionClimate ChangeSWAT
Flow (psychology)
Sediment
Flux
Climate change
04 agricultural and veterinary sciences
Structural basin
01 natural sciences
Streamflow
040103 agronomy & agriculture
0401 agriculture, forestry, and fisheries
Environmental science
Frequency distribution
0105 earth and related environmental sciences
Earth-Surface Processes
Subjects
Details
- Language :
- English
- Volume :
- 196
- Database :
- OpenAIRE
- Journal :
- CATENA
- Accession number :
- edsair.doi.dedup.....b2760ec8f202ced706fc685961f12cdd