Potential for Managed Aquifer Recharge to Enhance Fish Habitat in a Regulated River
Autor: | Robert W. Van Kirk, Bryce A. Contor, Ashly S. Loibman, Christina N. Morrisett, Sarah E. Null |
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Přispěvatelé: | M D P I AG |
Jazyk: | angličtina |
Rok vydání: | 2020 |
Předmět: |
Irrigation
lcsh:Hydraulic engineering Idaho Geography Planning and Development Aquifer climate adaptation Aquatic Science Biochemistry Brown trout lcsh:Water supply for domestic and industrial purposes lcsh:TC1-978 Streamflow Farm water Water Science and Technology Snake River Hydrology lcsh:TD201-500 geography geography.geographical_feature_category biology Henry’s Fork Groundwater recharge water rights stream temperature biology.organism_classification Water Resource Management Trout fisheries Environmental science streamflow Environmental Sciences Groundwater |
Zdroj: | Water Volume 12 Issue 3 Water, Vol 12, Iss 3, p 673 (2020) Watershed Sciences Faculty Publications |
ISSN: | 2073-4441 |
DOI: | 10.3390/w12030673 |
Popis: | Managed aquifer recharge (MAR) is typically used to enhance the agricultural water supply but may also be promising to maintain summer streamflows and temperatures for cold-water fish. An existing aquifer model, water temperature data, and analysis of water administration were used to assess potential benefits of MAR to cold-water fisheries in Idaho&rsquo s Snake River. This highly-regulated river supports irrigated agriculture worth US $10 billion and recreational trout fisheries worth $100 million. The assessment focused on the Henry&rsquo s Fork Snake River, which receives groundwater from recharge incidental to irrigation and from MAR operations 8 km from the river, addressing (1) the quantity and timing of MAR-produced streamflow response, (2) the mechanism through which MAR increases streamflow, (3) whether groundwater inputs decrease the local stream temperature, and (4) the legal and administrative hurdles to using MAR for cold-water fisheries conservation in Idaho. The model estimated a long-term 4%&ndash 7% increase in summertime streamflow from annual MAR similar to that conducted in 2019. Water temperature observations confirmed that recharge increased streamflow via aquifer discharge rather than reduction in river losses to the aquifer. In addition, groundwater seeps created summer thermal refugia. Measured summer stream temperature at seeps was within the optimal temperature range for brown trout, averaging 14.4 ° C, whereas ambient stream temperature exceeded 19 ° C, the stress threshold for brown trout. Implementing MAR for fisheries conservation is challenged by administrative water rules and regulations. Well-developed and trusted water rights and water-transaction systems in Idaho and other western states enable MAR. However, in Idaho, conservation groups are unable to engage directly in water transactions, hampering MAR for fisheries protection. |
Databáze: | OpenAIRE |
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