Journal
GEOCARTO INTERNATIONAL
Volume 37, Issue 27, Pages 16132-16156Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/10106049.2022.2105408
Keywords
Damming effect; indicators of hydrological alteration (IHA); degree of alteration; eco-hydro-deficit; surplus; and ecological distress
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Funding
- University Grants Commission (UGC), New Delhi, India [3430/(NET-DEC 2018)]
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This study successfully examined the impact of damming on the eco-hydrological conditions of the river and wetland. It found that damming led to a decrease in flow and a high flow failure rate, resulting in a negative hydrological alteration. The impact of damming was more pronounced in the river, leading to a growing eco-hydro deficit.
Present work successfully examined the damming impact on the eco-hydrological conditions of the river and wetland. The study found that monthly mean discharge was attenuated by 1.61 to 57% after damming. About 28.57 to 100% flow failure rate was found in the post-dam period and a moderate to the high degree of negative hydrological alteration (HA) for different IHA groups was identified. The flow failure rate in the river was >70% in most of the months while wetland water depth failure rates were 43% in pre-dam to 71% in post-dam, and a low and high negative degree of HA was observed over 20% and 9% of wetland areas respectively during post-monsoon season. The damming effect was found more intensive in the river than in wetlands. The eco-hydro deficit was recorded, which is an indication of growing ecological distress. The current result is used for river and wetland restoration planning.
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