Dry-wet and freeze-thaw cycles enhance PFOA leaching from subsurface soils DOI Creative Commons
Annesh Borthakur,

Patience Olsen,

Gregory Dooley

и другие.

Journal of Hazardous Materials Letters, Год журнала: 2021, Номер 2, С. 100029 - 100029

Опубликована: Май 29, 2021

Subsurface soil naturally experiences dry-wet and freeze-thaw cycles, which could affect the leaching of previously adsorbed pollutants. A slow release poly- perfluoroalkyl substances (PFAS) from impacted subsurface may serve as a long-term diffuse source PFAS to groundwater. Yet, extent these weathering conditions is unknown. We subjected columns packed with pre-adsorbed perfluorooctanoic acid (PFOA) cycles observed spike in PFOA concentration leachate following each treatment compared no treatment. Weathering released high colloids, were confirmed by particle-size distribution analysis, SEM-EDS, XRD. Fractionation water sample reveals that up 36 % leached was associated colloids. Thus, previous studies did not account for colloids might have underestimated soil. Overall, results indicate natural can enhance colloid-associated PFOA. Therefore, current conceptual site models quantify zones should contribution

Язык: Английский

Integrated Fuzzy AHP-TOPSIS Model for Assessing Managed Aquifer Recharge Potential in a Hot Dry Region: A Case Study of Djibouti at a Country Scale DOI Open Access
Rachid Mohamed Mouhoumed, Ömer Ekmekcioğlu, Eyyup Ensar Başakın

и другие.

Water, Год журнала: 2023, Номер 15(14), С. 2534 - 2534

Опубликована: Июль 10, 2023

Given the prevailing arid climate and rapid population growth, groundwater resources face unprecedented challenges globally, including depletion, seawater intrusion, contamination. Managed aquifer recharge (MAR) technologies have emerged as valuable solutions to address these pressing issues. However, identifying suitable regions for MAR activities is a complex task, particularly at country level. Therefore, in this study, we propose robust approach that combines fuzzy analytical hierarchy process (AHP) technique order of preference by similarity ideal solution (TOPSIS) delineate sites structures. The proposed model was applied Djibouti, hot, dry, water-stressed country. We identified set nine decision criteria conducted pairwise comparison survey determine their relative importance. Additionally, TOPSIS method employed integrate layers prioritize study area. results highlight significance rainfall, slope, NDVI most influential parameters, while drainage density has least impact. A suitability analysis reveals 16.38%, 17.96%, 30.41% very high, moderate potential activities, respectively. Furthermore, sensitivity demonstrates stability model, affirming usefulness generated map.

Язык: Английский

Процитировано

13

Water scarcity in the fast‐growing megacity of Lagos, Nigeria and opportunities for managed aquifer recharge DOI
Oluwaseun Franklin Olabode, Jean‐Christophe Comte

Wiley Interdisciplinary Reviews Water, Год журнала: 2024, Номер 11(5)

Опубликована: Май 23, 2024

Abstract In the last three decades, world has experienced a rapid emergence of megacities. The increasing demographics, urbanization, and water demand brought severe undesired effects on quantity quality their resources. A prime example is Lagos (Nigeria, West Africa), which projected to become world's largest city by 2100, faces scarcity challenges common other megacities developing countries. literature review reveals vast gap between regulated supply, inadequate knowledge information current state (re)sources, major, yet unregulated, use groundwater. It further highlights impacts uncontrolled wastewater discharge into surface waters aquifers, role paved surfaces blocked drainages flooding, supply potable water, unsustainable abstraction Here, we examine potential managed aquifer recharge (MAR) address these recurrent across megacity. analysis opportunities risks associated with capture wastewater, storm brackish for MAR. These waters, after appropriate treatment subsurface storage may bridge growing supply–demand mitigate groundwater (over)exploitation, including depletion, saltwater intrusion land subsidence. Immediate efforts should focus improving conceptual quantitative Lagos' hydrogeology resources through comprehensive spatial–temporal monitoring socio‐economic studies access use. insights provided inform fast‐growing coastal in Africa wider world. This article categorized under: Science Water > Environmental Change Engineering Water, Health, Sanitation Human Value Hydrological Processes

Язык: Английский

Процитировано

5

GIS-based suitability mapping of Managed Aquifer Recharge (MAR) in Diredawa catchment, Eastern Ethiopia DOI

Ze-Michael Yosef,

Behailu Birhanu,

Karuturi Venkata Suryabhagavan

и другие.

International Journal of River Basin Management, Год журнала: 2024, Номер unknown, С. 1 - 15

Опубликована: Июнь 11, 2024

Groundwater abstraction has increased tremendously due to population growth, urbanization, and industrial expansions. Managed Aquifer Recharge (MAR) been a promising technique for increasing freshwater availability in response water demand different consumptions. This study aimed identify suitable zones MAR the Diredawa catchment, eastern Ethiopia using multi-criteria decision analysis (MCDA). The seven parameters processed were soil texture, lithology, slope, land use cover, drainage density, transmissivity, quality (NO3). Each criterion was evaluated with analytical hierarchy process (AHP) mapped by GIS. sensitivity conducted map removal technique, potential validated borehole yield data. suitability assorted into very high, moderate, low, low classes, representing 15.8%, 25.8%, 28.8%, 13.1%, 16.3% areas. mapping is highly affected lithological variation. alluvial sediment, upper sandstone, fractured limestone sandy loam texture are areas implementing MAR. highest site located western, southwestern, northern parts of catchment. will serve as foundation future selection structures, aiming enhance groundwater supply sources, improve quality, manage urban flooding water-stressed flood-prone

Язык: Английский

Процитировано

5

Machine learning-based monitoring and design of managed aquifer rechargers for sustainable groundwater management: scope and challenges DOI Creative Commons

Abdul Gaffar Sheik,

Arvind Kumar,

A. G. Sharanya

и другие.

Environmental Science and Pollution Research, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 25, 2024

Abstract Managed aquifer recharge (MAR) replenishes groundwater by artificially entering water into subsurface aquifers. This technology improves storage, reduces over-extraction, and ensures security in water-scarce or variable environments. MAR systems are complex, encompassing various components such as soil, meteorological factors, management (GWM), receiving bodies. Over the past decade, utilization of machine learning (ML) methodologies for modeling prediction has increased significantly. review evaluates all supervised, semi-supervised, unsupervised, ensemble ML models employed to predict factors parameters, rendering it most comprehensive contemporary on this subject. study presents a concise integrated overview MAR’s effective approaches, focusing design, suitability quality (WQ) applications, GWM. The paper examines performance measures, input specifications, variety functions GWM, highlights prospects. It also offers suggestions utilizing MAR, addressing issues related physical aspects, technical advancements, case studies. Additionally, previous research ML-based data-driven soft sensing techniques is critically evaluated. concludes that integrating holds significant promise optimizing WQ enhancing efficiency replenishment strategies.

Язык: Английский

Процитировано

4

Dry-wet and freeze-thaw cycles enhance PFOA leaching from subsurface soils DOI Creative Commons
Annesh Borthakur,

Patience Olsen,

Gregory Dooley

и другие.

Journal of Hazardous Materials Letters, Год журнала: 2021, Номер 2, С. 100029 - 100029

Опубликована: Май 29, 2021

Subsurface soil naturally experiences dry-wet and freeze-thaw cycles, which could affect the leaching of previously adsorbed pollutants. A slow release poly- perfluoroalkyl substances (PFAS) from impacted subsurface may serve as a long-term diffuse source PFAS to groundwater. Yet, extent these weathering conditions is unknown. We subjected columns packed with pre-adsorbed perfluorooctanoic acid (PFOA) cycles observed spike in PFOA concentration leachate following each treatment compared no treatment. Weathering released high colloids, were confirmed by particle-size distribution analysis, SEM-EDS, XRD. Fractionation water sample reveals that up 36 % leached was associated colloids. Thus, previous studies did not account for colloids might have underestimated soil. Overall, results indicate natural can enhance colloid-associated PFOA. Therefore, current conceptual site models quantify zones should contribution

Язык: Английский

Процитировано

26