The impact of the proposed rubber dam facilitated surface water irrigation on adjacent groundwater at Chapai Nawabganj district, Bangladesh
| Autor: | Khairul Hasan, Sondipon Paul |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Irrigation
River model 0208 environmental biotechnology Aquifer 02 engineering and technology 010501 environmental sciences 01 natural sciences Surface water irrigation lcsh:Water supply for domestic and industrial purposes Dry season 0105 earth and related environmental sciences Water Science and Technology Hydrology lcsh:TD201-500 geography geography.geographical_feature_category Hydrogeology Groundwater recharge Rainfall–runoff model 020801 environmental engineering Groundwater model Environmental science Coupled river–groundwater modeling Surface water Groundwater |
| Zdroj: | Applied Water Science, Vol 11, Iss 2, Pp 1-15 (2021) |
| ISSN: | 2190-5495 2190-5487 |
| DOI: | 10.1007/s13201-021-01369-6 |
| Popis: | The dry season irrigation primarily depends on groundwater in Bangladesh. The over-abstraction, along with decreasing recharge, is depleting the groundwater resource across the country. Consequently, the government of Bangladesh is planning to switch from groundwater to surface water irrigation. In line with this, Bangladesh Water Development Board has proposed to construct a rubber dam on the Mohananda river at the Chapai Nawabganj district. This work investigated the impact of the proposed reservoir facilitated surface water irrigation on the adjacent groundwater in the study area. A coupled river–groundwater modeling technique was used to predict the long-term groundwater condition. Results showed that the groundwater lowering rate reduced to 50 mm/year inside the irrigation zone compared to 87 mm/year outside the zone. Also, the augmented surface water irrigation raised the groundwater over an area of 141 km2 and 242 km2 in 2029 relative to the base condition of 2013 and existing irrigation practice if continued, respectively. Besides, the raised groundwater resulted in a higher discharge from the aquifer to the river. The study concludes that increased surface water irrigation successfully lowered the groundwater declination rate, especially in the surface water irrigation zone. |
| Databáze: | OpenAIRE |
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