Global Recharge Data Set Indicates Strengthened Groundwater Connection to Surface Fluxes

Geophysical Research Letters, Год журнала: 2022, Номер 49(23)

Опубликована: Ноя. 29, 2022

Abstract Groundwater is an invaluable global resource, but its long‐term viability as a resource for consumption, agriculture, and ecosystems depends on precipitation recharging aquifers. How much recharges groundwaters varies enormously across Earth's surface, yet recharge rates often remain uncertain. Here we use synthesis of field‐estimated six continents to show that globally first‐order follows simple function climatic aridity. We this relationship estimate in energy‐limited systems outside permafrost regions. Our aridity‐based estimates are consistent with the field data but, average, double previous models. higher likely caused by preferential groundwater discharge occurring at grid scales finer than The suggest more contributes evapotranspiration streamflow previously represented hydrological models water cycle diagrams.

Язык: Английский

---

Groundwater recharge is sensitive to changing long-term aridity

Nature Climate Change, Год журнала: 2024, Номер 14(4), С. 357 - 363

Опубликована: Март 12, 2024

Язык: Английский

---

Groundwater quality: Global threats, opportunities and realising the potential of groundwater

The Science of The Total Environment, Год журнала: 2021, Номер 811, С. 152471 - 152471

Опубликована: Дек. 14, 2021

Groundwater is a critical resource enabling adaptation due to land use change, population growth, environmental degradation, and climate change. It can be driver of change adaptation, as well effectively mitigate impacts brought about by range human activities. quality key assessing groundwater resources we need improve our understanding coverage threats if are sustainably not further burden future generations limiting and/or increasing treatment or abstraction costs. Good progress on Sustainable Development Goals, but achievement those goals most affected contamination often hindered lack enable adaptation. A exist, both natural anthropogenic, which may constrain use. However, provides good water for purposes the important in many settings. This special issue explores some challenges face today opportunities solutions bring enhance safe Legacy anthropogenic contaminants geogenic documented certain places, such N America, Europe parts Asia. there real data accessibility regions, even more common contaminants. paucity information restrict ability manage protect sources. Compared surface quality, large scale assessments still scarce rely inadequate sets. Better access existing sets research needed threats. Identification quantification these will support wise protection this subsurface resource, allow society adequately address challenges, help communities realise full potential groundwater.

Язык: Английский

---

Linkages between GRACE water storage, hydrologic extremes, and climate teleconnections in major African aquifers

Environmental Research Letters, Год журнала: 2021, Номер 17(1), С. 014046 - 014046

Опубликована: Ноя. 23, 2021

Abstract Water resources management is a critical issue in Africa where many regions are subjected to sequential droughts and floods. The objective of our work was assess spatiotemporal variability water storage related controls (climate, human intervention) major African aquifers consider approaches toward more sustainable development. Different were used track storage, including GRACE/GRACE Follow On satellites for Total Storage (TWS); satellite altimetry reservoir MODIS vegetation indices, limited ground-based monitoring. Results show that declining trends TWS (60–73 km 3 over the 18 yr GRACE record) restricted northern Africa, controlled primarily by irrigation use Nubian NW Saharan aquifers. Rising found western (23–49 ), attributed increased recharge from land change cropland expansion. Interannual dominated eastern southern climate extremes. Climate teleconnections, particularly El Nino Southern Oscillation Indian Ocean Dipole, strongly floods Africa. Huge aquifer suggests recent decadal declines should not impact regional but may affect local conditions. Increasing groundwater levels will need be managed because locally rising flooding. More resilient can accomplished storing wet dry cycles. Accessing natural provided obvious way manage between

Язык: Английский

---

Divergent Causes of Terrestrial Water Storage Decline Between Drylands and Humid Regions Globally

Geophysical Research Letters, Год журнала: 2021, Номер 48(23)

Опубликована: Ноя. 17, 2021

Abstract Declines in terrestrial water storage (TWS) exacerbate regional scarcity and global sea level rise. Increasing evidence has shown that recent TWS declines are substantial ecologically fragile drylands, but the mechanism remains unclear. Here, by synergizing satellite observations model simulations, we quantitatively attribute trends during 2002–2016 major climate zones to three mechanistic drivers: variability, change, direct human activities. We reveal variability had transitory limited impacts (<20%), whereas warming‐induced glacier loss activities dominate humid regions (∼103%) drylands (∼64%), respectively. In non‐glacierized areas, generated gains offset synchronous declines. Yet losses enduring more widespread with activities, particularly unsustainable groundwater abstraction. Our findings highlight substantive footprints on already vulnerable arid an imperative need for improved dryland conservation.

Язык: Английский

---

Developing a pan-European high-resolution groundwater recharge map – Combining satellite data and national survey data using machine learning

The Science of The Total Environment, Год журнала: 2022, Номер 822, С. 153464 - 153464

Опубликована: Янв. 29, 2022

Groundwater recharge quantification is essential for sustainable groundwater resources management, but typically limited to local and regional scale estimates. A high-resolution (1 km × 1 km) dataset consisting of long-term average actual evapotranspiration, effective precipitation, a coefficient, the resulting map has been created all Europe using variety pan-European seven national gridded datasets. As an initial step, approach developed continental mapping consists merged estimate evapotranspiration originating from satellite data vegetation controlled Budyko subsequently precipitation. Secondly, machine learning model based on Random Forest regressor was coefficients, range covariates related geology, soil, topography climate. common feature validation training against coefficients datasets covering UK, Ireland, Finland, Denmark, Netherlands, France Spain, representing wide climatic hydrogeological conditions across Europe. The provides harmonised estimates locally relevant areas where this information otherwise not available, while being consistent with existing Pan-European pattern compares well results global hydrological PCR-GLOBWB 2. At country scale, were compared German showing great similarity. full available through EuroGeoSurveys' open access European Geological Data Infrastructure (EGDI).

Язык: Английский

---

Functional relationships reveal differences in the water cycle representation of global water models

Nature Water, Год журнала: 2023, Номер 1(12), С. 1079 - 1090

Опубликована: Ноя. 27, 2023

Язык: Английский

---

Participatory mapping of local green hydrogen cost-potentials in Sub-Saharan Africa

International Journal of Hydrogen Energy, Год журнала: 2025, Номер 112, С. 289 - 321

Опубликована: Март 1, 2025

Язык: Английский

---

Naïve Bayes ensemble models for groundwater potential mapping

Ecological Informatics, Год журнала: 2021, Номер 64, С. 101389 - 101389

Опубликована: Июль 31, 2021

Язык: Английский

---

The Role of Space-Based Observations for Groundwater Resource Monitoring over Africa

Surveys in Geophysics, Год журнала: 2023, Номер 44(1), С. 123 - 172

Опубликована: Янв. 25, 2023

Abstract Africa is particularly vulnerable to climate change impacts, which threatens food security, ecosystem protection and restoration initiatives, fresh water resources availability quality. Groundwater largely contributes the mitigation of effects by offering short- long-term transient storage. However, groundwater storage remains extremely difficult monitor. In this paper, we review strengths weaknesses satellite remote sensing techniques for addressing quantity issues with a focus on GRACE space gravimetry, as well concepts combine observations numerical models ground observations. One particular quantification changes in different climatic regions discussion possible anthropogenic drivers. We include thorough literature studies that use research Africa. Finally, identify gaps future directions employing monitoring management African continent. Article Highlights Overview distribution characteristics including projections Combination situ allows us obtain synoptic view groundwater-related processes Summary current achievements sensing-based decision making over

Язык: Английский

---