Using Random Forests to Explore the Feasibility of Groundwater Knowledge Transfer between the Contiguous US and Denmark DOI Creative Commons
Yueling Ma, Julian Koch, R. M. Maxwell

et al.

Environmental Research Communications, Journal Year: 2024, Volume and Issue: 6(12), P. 121005 - 121005

Published: Dec. 1, 2024

Abstract Groundwater is our largest freshwater reservoir, playing an important role in the global hydrologic cycle. Lack of reliable groundwater data restricts development monitoring systems linking observations with modeling at spatial scales relevant for local decision making. Despite growing interests machine learning (ML) resource modeling, taking ML models to scale still outstanding due sparse data. The contiguous US (CONUS) has extensive information covering a wide range hydrogeologic settings. We hypothesize that model trained on CONUS transferable other regions, and thus can be used produce water table depth (WTD) map within bounds transferability. To test this hypothesis, we conduct study transferring knowledge between Denmark, using several random forest against ∼30 m resolution long-term mean WTD joint from Denmark outperforms individual separately, implying similarities systems. improvement occurs where testing Nash-Sutcliffe efficiency rises 0.68 0.95. SHapley Additive exPlanations (SHAP) values are utilized express importance input variables. While annual precipitation plays key CONUS, it second least variable processes dominate. Moreover, Köppen-Geiger climate classification shows significant impact performance ranking variables, which might missing applied models. This provides unique insights into future developments towards improves confidence producing hyper-resolution sustainable management.

Language: Английский

Uncertainty in model estimates of global groundwater depth DOI Creative Commons
Robert Reinecke, Sebastian Gnann, Lina Stein

et al.

Environmental Research Letters, Journal Year: 2024, Volume and Issue: 19(11), P. 114066 - 114066

Published: Oct. 10, 2024

Abstract Knowing the depth at which groundwater can be found below land surface is critical for understanding its potential accessibility by ecosystems and society. Uncertainty in global scale water table (WTD) limits our ability to assess groundwater’s role a cycle altered changing climate, cover, human use. Global models offer top–down pathway gain this knowledge, but their uncertainty currently poorly quantified. Here, we investigate four reveal steady-state WTD disagreements of more than 100 m one-third area. We find that model estimates areas with shallow <10 vary from 10% 71% (mean 23%). This directly translates into subsequent assessments, as forests, population, equipped irrigation, differ substantially depending on chosen model. explore reasons these differences contrary observations, 3 out 4 show deeper tables humid arid climates greatly overestimate how strongly topographic slope controls WTD. These results highlight substantial associated any global-scale analysis, should considered ultimately reduced.

Language: Английский

Citations

4
Prospects for pastoralist-farmer conflict in Africa DOI Creative Commons
Mostafa Khorsandi,

Erwann Fillol,

Andrew Smerald

et al.

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 27, 2025

Abstract Pastoralism is a major way of life in the Sahelian and Sudanian (SaSu) zone Africa, playing an important social-environmental role through food production use suitable land for seasonal migrations (transhumance). Using Earth Observation (EO) data, we systematically analyze environmental factors—water access, soil properties, topography, vegetation cover, tree road biomass availability— to assess SaSu’s suitability transhumance as well permanent farming systems, provide perspectives on potential conflict zones between herders farmers case conflicting interests. Our study first present comprehensive detailed corridors that account constraints. We show 69% conflicts from 2001–2020 involve or are related tensions pastoralists, while 31% attributed interactions pastoralists. research provides valuable insights into complex relationships pastoralist communities their socio-ecological environment highlights critical EO-based decision support systems mapping understanding pastoralism SaSu region.

Language: Английский

Citations

0
A global dataset of average specific yield for soils DOI Creative Commons
Meizhao Lv, Meixia Lv, Yuanyuan Zha

et al.

Scientific Data, Journal Year: 2025, Volume and Issue: 12(1)

Published: March 12, 2025

Abstract Specific yield ( S y ) stands as a critical parameter and significant source of error in groundwater simulations. However, there is still lack reliable global datasets. Based on the trilinear graph soil textures, we develop comprehensive dataset gridded average specific (GASY) aimed for various which are obtained from Global Soil Dataset Earth System Models, SoilGrids product, Harmonized World Database. Validations with existing values estimated by laboratory field methods across different concepts, at aquifer-scale to global-scale, compellingly revealed that GASY effectively represents each texture. The depth limitation (~2 m) attributed limitations texture data, readers can expand into deeper soils reasonably assuming vertical variation depth. holds great benefits future modeling dynamics understanding resources distribution mitigation climate change impacts.

Language: Английский

Citations

0
Long-term hydro-economic analysis tool for evaluating global groundwater cost and supply: Superwell v1.1 DOI Creative Commons
Hassan Niazi, Stephen B. Ferencz, Neal T. Graham

et al.

Geoscientific model development, Journal Year: 2025, Volume and Issue: 18(5), P. 1737 - 1767

Published: March 13, 2025

Abstract. Groundwater plays a key role in meeting water demands, supplying over 40 % of irrigation globally, with this likely to grow as demands and surface variability increase. A better understanding the future groundwater sectoral requires an integrated hydro-economic evaluation its cost availability. Yet substantial gaps remain our knowledge modeling capabilities related availability, recharge, feasible locations for extraction, extractable volumes, associated extraction costs, which are essential large-scale analyses human–water system scenarios, particularly at global scale. To address these needs, we developed Superwell, physics-based accounting model that operates sub-annual temporal coarsest 0.5° (≈50 km × 50 km) gridded spatial resolution coverage. The produces location-specific supply–cost curves provide levelized access different quantities available groundwater. inputs Superwell include recent high-resolution hydrogeologic datasets permeability, porosity, aquifer thickness, depth table, hydrogeological complexity zones. It also accounts well capital maintenance energy costs required lift surface. employs Theis-based scheme coupled amortization-based formulation simulate quantify pumping. result is spatiotemporally flexible, physically realistic, economics-based curves. We show examples insights can be derived from them across set scenarios designed explore outcomes. produced by most (90 %) nonrenewable storage globally lower than USD 0.57 m−3, while half volume remains under 0.108 m−3. unit estimated range minimum 0.004 m−3 maximum 3.971 demonstrate discuss how could used linking Superwell's outputs other models human–environmental challenges, such resources planning management, or broader multisectoral feedbacks.

Language: Английский

Citations

0
Groundwater leakage of an endorheic basin with extensive permafrost coverage in the western Mongolian Plateau DOI
Shun Hu, Chenyi Hu,

Keyu Meng

et al.

Journal of Hydrology, Journal Year: 2025, Volume and Issue: unknown, P. 133175 - 133175

Published: March 1, 2025

Language: Английский

Citations

0
Current trends and biases in groundwater modelling using the community-driven groundwater model portal (GroMoPo) DOI Creative Commons
Daniel Zamrsky, Sacha Ruzzante, Kyle Compare

et al.

Hydrogeology Journal, Journal Year: 2025, Volume and Issue: unknown

Published: March 28, 2025

Abstract Groundwater, Earth’s largest nonfrozen freshwater reservoir, is vital for water supply security. Groundwater models help to manage complex domestic, agricultural, and industrial demands while preserving ecosystem health under climate change. The community-driven groundwater model portal (GroMoPo) hosts metadata analyse biases distribution of models. Over 450 are currently featured on GroMoPo, with most from high-GDP countries at local-to-regional scales. GroMoPo initiative addresses current knowledge gaps facilitates future collaboration data sharing.

Language: Английский

Citations

0
Tackling water table depth modeling via machine learning: From proxy observations to verifiability DOI Creative Commons
Joseph Janssen,

Ardalan Tootchi,

Ali Ameli

et al.

Advances in Water Resources, Journal Year: 2025, Volume and Issue: unknown, P. 104955 - 104955

Published: April 1, 2025

Language: Английский

Citations

0
Delineation of the Optimal Groundwater Recharge Zone in Taif Basin, Western Saudi Arabia: Implication for Groundwater Sustainability DOI
Mohammed Benaafi, Ahmed M. Al‐Areeq, Amran A. Al Aghbari

et al.

Arabian Journal for Science and Engineering, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 20, 2024

Language: Английский

Citations

1
Effects of grid resolution on regional modelled groundwater salinity and salt fluxes to surface water DOI Creative Commons
Ignacio Farías, Gualbert Oude Essink,

P. G. B. de Louw

et al.

Journal of Hydrology, Journal Year: 2024, Volume and Issue: 643, P. 131915 - 131915

Published: Sept. 1, 2024

Coastal fresh groundwaters face growing threats from rising withdrawals and climate change, with salinization of surface groundwater as notable impacts. Recent developments in parallel variable-density modelling enable studying these at unexplored resolutions extents. To improve the understanding ground- water processes we designed an experiment to measure how spatial resolution affects both salinity distribution salt loads waters. An existing parallelized coupled flow transport (VD-GWT) model is applied a region Netherlands whereby drainage network parameterized grid between 10 250 m. The results show strong dependency shallow while simulated are affected by imperfect flux scaling. computational resources needed for this test suggest that regional high-resolution VD-GWT models feasible using HPC environments, albeit not practical.

Language: Английский

Citations

1
Modelling Groundwater Hydrological Drought and Its Recovery Given Natural and Anthropogenic Scenarios in South America DOI Creative Commons
Jorge Vega Briones, Edwin H. Sutanudjaja,

Steven de Jong

et al.

Hydrological Processes, Journal Year: 2024, Volume and Issue: 38(11)

Published: Nov. 1, 2024

ABSTRACT Changes in groundwater recharge are a major concern areas where increasing irrigated agriculture evidences unsustainable withdrawals despite low precipitation. This is worsening due to the demand, which has intensified magnitude of hydrological drought by 10%–500%. Globally, 69% abstraction used for agriculture. Hence, South America expected face an unprecedented over next 30 years rising agricultural withdrawals. Furthermore, attributing decline pumping ongoing challenge (including scientific and technical/modelling challenges) that needs be robustly addressed. To better understand influence anthropogenic water consumption on drought, with particular emphasis how impacts groundwater, we compared coupled non‐coupled versions PCR‐GLOBWB2.0 MODFLOW regarding model selection scenario comparison. We presented natural human effects depletion recovery. Using comparison, spatial patterns impact cycle identified comparing flows, characteristics, These impacted may help their consumption, food security, ecosystem demands.

Language: Английский

Citations

1