Recharge Dam Efficiency Based on Subsurface Flow Analysis

Al-Hassoun, Saleh A.; Al-Turbak, Abdulaziz S.

doi:10.1080/02508069508686449

Cited by 3 publications

(1 citation statement)

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“…Much like surface water, groundwater flow paths may also be affected by the presence of downstream dams. For example, networks of small dams are used to recharge aquifers in arid Middle Eastern countries (Abdelrahman and Abelmagid, 1993;Alhassoun and Alturbak, 1995;Abu-Taleb, 2003). Dewatering groundwater supplies within the impounded riverine wetlands on the Little River likely contributed more N-rich water to the channel than lateral channel sediments isolated from groundwater flow paths.…”

Section: Wetland and Non-wetland Variable Source Areas Within Recovermentioning

confidence: 99%

Physical and Plant Community Controls on Nitrogen and Phosphorus Leaching From Impounded Riverine Wetlands Following Dam Removal

Riggsbee

Wetzel

Doyle

2011

River Research & Apps

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Dam removal has emerged as a critical issue in water resources engineering and management. Of particular concern in many regions of the USA is the effect of dam removal on downstream water quality and potential methods of decreasing sediment and nutrient loading to downstream reaches. Rapid revegetation of reservoir sediments has been suggested as a means of reducing the impact of dam removal, although little data exist about the role of vegetation in controlling the downstream release of sediment or nutrients. This study investigated an impounded riverine wetland complex on the Little River, North Carolina, before and after the removal of a low‐head dam. We quantified the leaching of interstitial nitrogen (N) and phosphorus (P) to the adjacent river channel during reservoir dewatering and, through experimental manipulations, isolated the difference between physical (soil) and biological (plant) controls on N and P leaching from dewatering impoundment sediments. We found that the rate and the quantity of N and P leaching from impounded dewatering sediment are predominately controlled by sediment porosity and specific yield. Although vegetation controls on N and P leaching were statistically significant during the first growing season following dam removal, vegetation is likely to be more important as a long‐term control on sediment and nutrient loads. Our results suggest that the initial release of N and P from a dewatered reservoir will be difficult to control but that vegetation may play an important long‐term role. Copyright © 2011 John Wiley & Sons, Ltd.

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Section: Wetland and Non-wetland Variable Source Areas Within Recovermentioning

confidence: 99%