Utilization Management to Ensure Clean Water Sources in Coastal Areas

Journal of Human Earth and Future, Journal Year: 2023, Volume and Issue: 4(1), P. 23 - 35

Published: March 1, 2023

Coastal communities utilize tidal water sources; existing surface does not meet clean standards, and are greatly affected by current use. Managing sources to the needs of community is very difficult obtain, so research needed determine quality, quantity, distance standards. This study aims sources. used a descriptive qualitative approach, observation method, survey, questionnaire, documentation. Good source management will ensure that everyone has enough water. October's highest potential Q = 61.96 m3/s April's low 1.02 m3/s, Qt groundwater 0.12 lowest 0.05 m3/s. Water availability 21.15 with domestic demand rate 0.127 0.021 non-domestic. A suitable compliant located at point 5 9 km from location coastal area, 87% quality conditions Temperature, pH, NO3, NO2, TN, COD, BOD, Chlo-a standard value obtained 0.2 mg/l, indicating condition contaminated safe. challenges prudent use management. Nature-based littoral zone enhances quality. Pollution management, sustainable use, involvement safeguard habitats, biodiversity, Doi: 10.28991/HEF-2023-04-01-03 Full Text: PDF

Language: Английский

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Closing the gap between science and management of cold‐water refuges in rivers and streams

Global Change Biology, Journal Year: 2023, Volume and Issue: 29(19), P. 5482 - 5508

Published: July 19, 2023

Abstract Human activities and climate change threaten coldwater organisms in freshwater ecosystems by causing rivers streams to warm, increasing the intensity frequency of warm temperature events, reducing thermal heterogeneity. Cold‐water refuges are discrete patches relatively cool water that used for relief short‐term survival. Globally, cohesive management approaches needed consider interlinked physical, biological, social factors cold‐water refuges. We review current understanding refuges, identify gaps between science management, evaluate policies aimed at protecting thermally sensitive species. Existing include designating habitats, restricting fishing during periods, implementing threshold standards or guidelines. However, these rare uncoordinated across spatial scales often do not input from Indigenous peoples. propose be managed as distinct operational landscape units, which provide a ecological context is relevant watershed scale. These units foundation an integrated framework links (1) mapping characterizing prioritize conservation actions, (2) leveraging existing new policies, (3) improving coordination jurisdictions, (4) adaptive practices scales. Our findings show while there many opportunities scientific advancement, state sciences sufficient inform policy management. proposed provides path forward managing using protect face global change.

Language: Английский

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Groundwater-Surface water interactions research: Past trends and future directions

Journal of Hydrology, Journal Year: 2024, Volume and Issue: unknown, P. 132061 - 132061

Published: Sept. 1, 2024

Language: Английский

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Saltwater Intrusion Into a Confined Island Aquifer Driven by Erosion, Changing Recharge, Sea‐Level Rise, and Coastal Flooding

Water Resources Research, Journal Year: 2024, Volume and Issue: 60(1)

Published: Jan. 1, 2024

Abstract Aquifers on small islands are at risk of salinization due to low elevations and limited adaptive capacity, present risks will be exacerbated by climate change. Most studies addressing small‐island saltwater intrusion (SWI) have focused homogeneous sandy one or two hydraulic disturbances. We herein investigate SWI dynamics in a layered, confined island aquifer response multiple environmental perturbations related change, with considered tandem. Our field modeling work is based an that provides the drinking water supply for Indigenous community Atlantic Canada. Observation well data electrical resistivity profiles were used calibrate numerical model (HydroGeoSphere) coupled groundwater flow salt transport. The calibrated was simulate impacts change including sea‐level rise (SLR), storm surge overtopping, changing recharge, erosion. Simulated conditions resilient surges because confining layer prevented deeper leaching. However, reduced recharge erosion resulted wedge migration 170 110 m, respectively when individually, up 295 m (i.e., into wellfield) together. Despite conditions, SLR 55 as pressures not sufficient resist movement. This first study harness integrated, surface‐subsurface hydrologic assess effects coastal other hydroclimatic stressors aquifers, highlighting can drive extensive critical resources.

Language: Английский

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Modelled Water Temperature Patterns and Energy Balance of a Threatened Coastal Lagoon Ecosystem

Hydrological Processes, Journal Year: 2025, Volume and Issue: 39(2)

Published: Feb. 1, 2025

ABSTRACT Coastal water temperatures control physical, chemical, and biological processes are expected to rise due future changes in freshwater temperature flow rates, heat exchange with the warming atmosphere, thermal interactions a changing ocean. However, sensitivity of transitional, coastal bodies climate change remains poorly understood, partly lack knowledge on present‐day controls these settings. Accordingly, we applied hydrodynamic model (MIKE 3 FM), coupled module simulate hydrodynamics variability Basin Head lagoon, federally protected ecosystem Canadian province Prince Edward Island. Field data from lagoon were used calibrate assess numerical model, while atmospheric, oceanic, hydrologic form boundary conditions. The successfully reproduced tidal level oscillations as well diurnal semi‐diurnal (tidal) fluctuations. Model results show longitudinal, cross‐shore, vertical within including pronounced near bed inlet pumping. field highlight during waves; however, distinct cold‐water plumes at inputs (springs groundwater‐dominated streams) persisted, temporally averaged zones up 18 °C colder than ambient lagoon. Although, inflows can dominate local energy budgets, surface fluxes, especially shortwave radiation, exert dominant lagoon‐wide budget. Collectively, findings emphasise interacting effects hydrologic, oceanic forcing spatiotemporal patterns this threatened ecosystem.

Language: Английский

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Impacts of Extratropical Cyclone Fiona on a sensitive coastal lagoon ecosystem

Limnology and Oceanography, Journal Year: 2023, Volume and Issue: 68(12), P. 2703 - 2715

Published: Nov. 6, 2023

Abstract Oceanic storms can strongly disturb the physical and biogeochemical conditions of transitional coastal waters. Impacts extreme oceanic on ecosystems have received limited attention worldwide, with no studies at higher latitudes (> 45°) where tropical cyclones usually abated. This study investigates combined impacts from marine atmospheric forcing a lagoon in Prince Edward Island, Canada, during after Extratropical Cyclone Fiona September 2022. Physical (water levels temperature) (dissolved oxygen [DO], electrical conductivity, pH, nitrate–nitrogen concentrations, total suspended solids [TSS]) datasets watershed's tributaries, groundwater springs, piezometers were used to assess ecosystem disturbance recovery timelines following storm. resulted 1.6 m storm surge into that elevated water temperatures by up 6°C, disturbed density‐dependent stratification salinity temperature, reduced diel amplitude DO, indicating reduction plant respiration due disturbance. The freshwater tributaries revealed sharp changes flow (30‐fold increase), (NO 3 ‐N) concentrations loading (70‐fold TSS (40‐fold increase) immediately rapidly recovered (hours) hydraulic surge, but nutrient persisted for months. intensity frequency extratropical is projected increase Northwest Atlantic, making field‐based cyclone waters critical understanding future periods relative timing storms.

Language: Английский

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Intertidal spring dynamics and coastal nutrient loading revealed through geophysics, drone surveys, and in‐situ monitoring

Hydrological Processes, Journal Year: 2024, Volume and Issue: 38(5)

Published: May 1, 2024

Abstract Coastal eutrophication poses an increasing risk to ecosystem health due enhanced nutrient loading the global coastline. Submarine groundwater discharge (SGD) represents a significant pathway for nitrate‐nitrogen (NO 3 ‐N) transport coast, but diffusive SGD is difficult monitor directly, given low flux rates and expansive areas. In contrast, focused from intertidal springs can potentially be sampled directly gauged, providing unique insight into associated contaminant transport. Basin Head coastal lagoon in Prince Edward Island, Canada that federally protected ecosystem. Nitrate‐nitrogen conveyed agricultural fields contributing watershed eutrophic via groundwater‐dominated tributaries. We used several field methods characterize discharge, loading, in‐channel mixing with springs. The tributaries were gauged estimate representative summer nitrate load lagoon. Our analysis revealed NO ‐N export through throughout 2023 was on average 401 kg N/month, combined spring comparable magnitude tributary loading. collected thermal infrared visual imagery using drone surveys found spatial overlap between cold‐water plumes macroalgae blooms, indicating local impacts of SGD. also mapped electrical resistivity (salinity) distribution water column around one large electromagnetic geophysics at different tidal stages reveal three‐dimensional plume dynamics. Results showed fresher floated above saline brackish oriented direction current. Collectively, our multi‐pronged investigations help elucidate hydrologic, thermal, dynamics cascading impacts.

Language: Английский

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Impacts of climate change and best management practices on nitrate loading to a eutrophic coastal lagoon

Frontiers in Environmental Science, Journal Year: 2024, Volume and Issue: 12

Published: Aug. 27, 2024

Anthropogenic climate change and associated increasing nutrient loading to coasts will worsen coastal eutrophication on a global scale. Basin Head is lagoon located in northeastern Prince Edward Island, Canada, with federally protected ecosystem. Nitrate-nitrogen (NO 3 -N) conveyed from agricultural fields the watershed eutrophic via intertidal groundwater springs groundwater-dominated tributaries. A field program focused four main tributaries that discharge into was conducted measure year-round NO -N loading. These measurements were used calibrate SWAT+ hydrologic model capable of simulating loads lagoon. Several scenarios incorporating different best management practices (BMPs) simulated better understand potential future dynamics. Results indicate all produced increased annual when comparing historical (1990–2020) end century time periods (2070–2100); however, only one scenario (MRI-ESM2-0 SSP5-8.5) resulted statistically significant ( p -value <0.05) increase. Enlarged buffer strips delayed tillage BMP simulations small (0%–8%) effects loading, while changing crop rotation potato-barley-clover potato-soybean-barley yielded reduction between period (26%–33%). Modeling revealed changes seasonal dynamics under where remained more consistent throughout year as opposed current conditions dominant load spring. An increase baseflow contributions streamflow also noted change, largest occurring winter (e.g., up five-fold February). findings have direct implications for watersheds climate.

Language: Английский

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Borehole heat exchangers in coastal areas may reduce heatwave seagrass loss

Geoscience Letters, Journal Year: 2025, Volume and Issue: 12(1)

Published: Jan. 27, 2025

Language: Английский

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Surface water-groundwater interaction affects soil temperature distributions and variations in salt marshes

Advances in Water Resources, Journal Year: 2023, Volume and Issue: 172, P. 104366 - 104366

Published: Jan. 4, 2023

Language: Английский

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