Unraveling the Interactions between Flooding Dynamics and Agricultural Productivity in a Changing Climate

Sustainability, Год журнала: 2024, Номер 16(14), С. 6141 - 6141

Опубликована: Июль 18, 2024

Extreme precipitation and flooding frequency associated with global climate change are expected to increase worldwide, major consequences in floodplains areas susceptible flooding. The purpose of this review was examine the effects events on changes soil properties their agricultural production. Flooding is caused by natural anthropogenic factors, can be amplified interactions between rainfall catchments. impacts structure aggregation altering resistance slaking, which occurs when aggregates not strong enough withstand internal stresses rapid water uptake. disruption enhance erosion sediment transport during contribute sedimentation bodies degradation aquatic ecosystems. Total precipitation, flood discharge, total main factors controlling suspended mineral-associated organic matter, dissolved particulate matter loads. Studies conducted paddy rice cultivation show that flooded reduced conditions neutralize pH but reversible upon draining soil. In soil, nitrogen cycling linked decreases oxygen, accumulation ammonium, volatilization ammonia. Ammonium primary form inorganic porewaters. floodplains, nitrate removal enhanced high denitrification intermittent provides necessary anaerobic conditions. soils, reductive dissolution minerals release phosphorus (P) into solution. Phosphorus mobilized events, leading increased availability first weeks waterlogging, generally time. Rainstorms promote subsurface P-enriched particles, colloidal P account for up 64% tile drainage water. Anaerobic microorganisms prevailing utilize alternate electron acceptors, such as nitrate, sulfate, carbon dioxide, energy production decomposition. metabolism leads fermentation by-products, acids, methane, hydrogen sulfide, influencing pH, redox potential, nutrient availability. Soil enzyme activity presence various microbial groups, including Gram+ Gram− bacteria mycorrhizal fungi, affected Waterlogging β-glucosidase acid phosphomonoesterase increases N-acetyl-β-glucosaminidase Since these enzymes control hydrolysis cellulose, phosphomonoesters, chitin, moisture content impact direction magnitude supply oxygen submerged plants limited because its diffusion extremely low, mitochondrial respiration plant tissues. Fermentation only viable pathway plants, which, under prolonged waterlogging conditions, inefficient results death. Seed germination also impaired stress due decreased sugar phytohormone biosynthesis. sensitivity different crops varies significantly across growth stages. Mitigation adaptation strategies, essential management agriculture, resilience through improved practices, amendments rehabilitation techniques, best zero tillage cover crops, development flood-tolerant crop varieties. Technological advances play a crucial role assessing dynamics landscapes. This embarks comprehensive journey existing research unravel intricate interplay production, environment. We synthesize available knowledge address critical gaps understanding, identify methodological challenges, propose future directions.

Язык: 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, Год журнала: 2024, Номер 60(1)

Опубликована: Янв. 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.

Язык: Английский

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Harnessing Machine Learning for Assessing Climate Change Influences on Groundwater Resources: A Comprehensive Review

Heliyon, Год журнала: 2024, Номер 10(17), С. e37073 - e37073

Опубликована: Авг. 28, 2024

Язык: Английский

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Interrelated Coastal Flooding, Erosion, and Groundwater Salinization on a Barrier Island During Hurricane Fiona

Journal of Geophysical Research Earth Surface, Год журнала: 2024, Номер 129(4)

Опубликована: Апрель 1, 2024

Abstract Coastal flooding transforms barrier island morphology and rapidly salinizes freshwater lenses that support populations ecosystems. Climate change is expected to increase coastal flood risks, understanding future vulnerability requires erosion salinization processes their feedbacks. This study investigates how groundwater salinity distributions on Hog Island, Prince Edward Canada, responded high water levels during post‐tropical storm Fiona (24 September 2022), the costliest hurricane make landfall in Canadian history. Island was monitored with drone‐based LiDAR, beach dynamics were investigated frequency‐domain electromagnetic geophysics surveys monitoring wells. Comparing pre‐storm post‐disturbance data revealed dune scarping thinned ocean‐side foredune by 12.3 m average reduced total volume 12%. Beach electrical conductivity increased up 2 19 mS cm −1 , respectively, lens lost under eroded foredune. Measurements 9 months after early‐stage recovery of foredune; however, prolonged recovery, only 1%. Without a stable foredune, landward extent recurring limited flushing aquifer recovery. Results indicate rapid from extreme storms shifts boundaries, formerly resources, limits These findings emphasize importance often‐overlooked interconnections between flooding, erosion, effectively manage resources an age environmental change.

Язык: Английский

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Impacts of groundwater dynamics around a macro-tidal river on agricultural soil salinity

The Science of The Total Environment, Год журнала: 2024, Номер 927, С. 172344 - 172344

Опубликована: Апрель 10, 2024

Estuaries are vulnerable to oceanic and atmospheric climate change. Much of the research investigating change impacts on estuaries is focused saltwater intrusion within surface water due drought rising sea levels, with implications for ecosystems humans. Groundwater soil near may also be influenced, as estuary salinity hydraulic head changes can impact soils aquifers not previously at risk salinization. This study was conducted address knowledge gaps related present future groundwater distribution in a system connected macro-tidal estuary. The studied experiences tidal bore its connection Bay Fundy Nova Scotia, Canada. A parcel agricultural land adjacent selected assess response episodic fluctuations levels salinity. monitoring electromagnetic surveys were map patterns. numerical model flow solute transport informed by field data used investigate how varying droughts sea-level rise could Results showed that, contrast salt wedges observed along marine coasts, saline existed plume immediately around Model simulations that short-term had an insignificant However, permanent increases caused increased volume 86 %, or additional ∼11 m horizontally ∼ 4.5 vertically. Our results suggest river this setting would result widespread salinization porewater soils, but more extensive experienced permeable estuarine zones. Findings inform management decisions regions exposed future.

Язык: Английский

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Mega‐Tidal and Surface Flooding Controls on Coastal Groundwater and Saltwater Intrusion Within Agricultural Dikelands

Water Resources Research, Год журнала: 2023, Номер 59(11)

Опубликована: Ноя. 1, 2023

Abstract Climate change will increase sea levels, driving saltwater into coastal aquifers and impacting communities land use viability. Coastal are also impacted by tides that control groundwater‐ocean interactions maintain an “upper saline plume” (USP) of brackish groundwater. dikes designed to limit the surface impacts high‐amplitude tides, but, due ongoing sea‐level rise (SLR), low‐lying dikelands underlying becoming increasingly vulnerable flooding from high storm surges. This study combines field observations with numerical modeling investigate ocean‐aquifer mixing future intrusion dynamics in a mega‐tidal (tidal range >8 m) dikeland along Bay Fundy Atlantic Canada. Field data revealed strong connectivity between ocean aquifer, as evidenced pronounced tidal oscillations deeper groundwater heads order magnitude intra‐tidal subsurface electrical resistivity. Numerical model results indicate SLR surges force migration USP landward, amplifying salinization freshwater resources. Simulated can overtop dike, contaminating agricultural soils. The presence decreased under low surge scenarios, but increased larger overtopping scenarios landward ponding seawater behind dike. Mega‐tidal conditions large impact aquifer freshening rates. Results highlight vulnerability terrestrial soil landscapes resources climate suggest dike management decisions should be considered addition protection measures associated processes.

Язык: 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, Год журнала: 2024, Номер 12

Опубликована: Авг. 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.

Язык: Английский

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Tidal signal propagation in coastal aquifers considering semi-permeable boundaries and partial penetration effects

Journal of Hydrology, Год журнала: 2025, Номер unknown, С. 132657 - 132657

Опубликована: Янв. 1, 2025

Язык: Английский

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The growing trend of saltwater intrusion and its impact on coastal agriculture: Challenges and opportunities

The Science of The Total Environment, Год журнала: 2025, Номер 966, С. 178701 - 178701

Опубликована: Фев. 1, 2025

Saltwater intrusion (SWI) into coastal agricultural lands represents a growing threat to productivity, ecosystem stability, and local economies. This phenomenon, affecting surface ground waters, is driven by intensified natural processes anthropogenic factors under changing climate. Here, we provide comprehensive review of the drivers trends SWI their impacts on transition systems. We emphasize importance developing salt-tolerant crop varieties implementing controlled environment agriculture maintain productivity in affected regions. Additionally, discuss role marsh migration (i.e., allowing marshes migrate lands) enhancing biodiversity ecological resilience, protecting remaining farmlands from SWI. highlights urgent need for multidisciplinary research, strategic policy frameworks, community engagement ensure sustainability future face increasing challenges.

Язык: Английский

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Saline sediment deposition in estuarine floodplains exacerbates vertical saltwater intrusion

Journal of Hydrology, Год журнала: 2025, Номер unknown, С. 133116 - 133116

Опубликована: Март 1, 2025

Язык: Английский

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