The Unexploited Treasures of Hydrological Observations Beyond Streamflow for Catchment Modeling DOI Creative Commons
Paul D. Wagner, Doris Duethmann, Jens Kiesel

et al.

Wiley Interdisciplinary Reviews Water, Journal Year: 2025, Volume and Issue: 12(2)

Published: March 1, 2025

ABSTRACT While measured streamflow is commonly used for hydrological model evaluation and calibration, an increasing amount of data on additional variables available. These have the potential to improve process consistency in modeling consequently predictions under change, as well data‐scarce or ungauged regions. Here, we show how these beyond are currently calibration. We consider storage flux variables, namely snow, soil moisture, groundwater level, terrestrial water storage, evapotranspiration, altimetric level. aim at summarizing state‐of‐the‐art providing guidance use Based a review current literature, summarize observation methods uncertainties available sets, challenges regarding their implementation, benefits consistency. The focus catchment studies with study areas ranging from few km 2 ~500,000 . discuss implementing alternative that related differences spatio‐temporal resolution observations models, variable‐specific features, example, discrepancy between observed simulated variables. further advancements required deal integrate multiple, potentially inconsistent datasets. increased improvement shown by most reviewed often come cost slight decrease performance.

Language: Английский

The Influence of Topography on the Global Terrestrial Water Cycle DOI Creative Commons
Sebastian Gnann, Jane W. Baldwin, Mark Cuthbert

et al.

Reviews of Geophysics, Journal Year: 2025, Volume and Issue: 63(1)

Published: Jan. 3, 2025

Abstract Topography affects the distribution and movement of water on Earth, yet new insights about topographic controls continue to surprise us exciting puzzles remain. Here we combine literature review data synthesis explore influence topography global terrestrial cycle, from atmosphere down groundwater. Above land surface, induces gradients contrasts in energy availability. Long‐term precipitation usually increases with elevation mid‐latitudes, while it peaks at low‐ mid‐elevations tropics. Potential evaporation tends decrease all climate zones. At is expressed snow distribution, vegetation zonation, geomorphic landforms, critical zone, drainage networks. Evaporation activity are often highest where neither temperature, nor availability, availability—often modulated by lateral moisture redistribution—impose strong limitations. Below drives groundwater local continental scales. In many steep upland regions, systems well connected streams provide ample baseflow, start losing foothills bedrock transitions into highly permeable sediment. We conclude presenting organizing principles, discussing implications change human activity, identifying needs knowledge gaps. A defining feature resulting presence contrasts, whose interactions explain patterns observe nature how they might future.

Language: Английский

Citations

0
Controls on coastal saline groundwater across North America DOI Creative Commons
Daniel Kretschmer, Holly A. Michael, Nils Moosdorf

et al.

Environmental Research Letters, Journal Year: 2025, Volume and Issue: 20(2), P. 024065 - 024065

Published: Jan. 17, 2025

Abstract Groundwater is crucial to sustaining coastal freshwater needs. About 32 million people in the USA rely on groundwater as their primary water source. With rapidly growing communities and increasing demands for fresh groundwater, understanding controls of continental-scale salinity critical. To investigate what hydrogeological factors (e.g. topography, hydraulic conductivity) control saline at continental scales, we have simulated variable-density flow across North America with newly developed Global Gradient-based Model variable Densities (G 3 M-D). The simulation results suggest that under a steady climate pre-development conditions (i.e. 30-year mean recharge, no withdrawals nor sea level rise) present 18.6% America’s zone, defined up 100 km inland m above level. We find zone particularly vulnerable containing low gradients (<10 −4 ) large conductivities (>10 −2 d −1 ). analyze model parameter sensitivities, i.e. which parameters resulting distribution utilize inherent spatial variability. gradient, topographic conductivity, aquifer depth are important different places. However, factor salinization alone, suggesting interactions important. Using G M-D based M, previous work found be strongly controlled by controlling influence recharge variability America. Despite likely overestimation interface movement, required 492 000 years reach near-steady state, indicating has been evolving since before end last ice age, approximately 20 ago.

Language: Английский

Citations

0
Zambezi River Basin aquifer systems: opportunities and challenges in using freely available data sources and groundwater flow modelling for spatial exploratory analysis. DOI
Kawawa Banda,

Ezio Crestaz,

Roman Seliger

et al.

Groundwater for Sustainable Development, Journal Year: 2025, Volume and Issue: unknown, P. 101421 - 101421

Published: Feb. 1, 2025

Language: Английский

Citations

0
Exploration of Spatiotemporal Covariation in Vegetation–Groundwater Relationships: A Case Study in an Endorheic Inland River Basin DOI Creative Commons
Zheng Lu, Dongxing Wu,

Shasha Meng

et al.

Land, Journal Year: 2025, Volume and Issue: 14(4), P. 715 - 715

Published: March 27, 2025

Groundwater plays a vital role in sustaining dryland ecosystems, yet our understanding of the spatiotemporal dynamics groundwater–vegetation interactions endorheic river basins remains limited. In this study, covariation between normalized difference vegetation index (NDVI) and water table depth (WTD) Heihe River Basin (HRB), representative system, is investigated via multisource data generalized additive models (GAMs). The results indicate that NDVI peaks summer (July), with corresponding decline WTD, indicating basin-wide negative correlation. Spatial analysis reveals distinct upstream–downstream gradients: upstream regions exhibit strong seasonal synchronization, whereas midstream downstream areas show weaker correlations because mixed surface groundwater influences. Landcover climate significantly affect these interactions, arid zones showing strongest (ρ = −0.38), particularly wetlands, humid nonsignificant relationships. Geomorphological highlights stronger mountainous than low-relief plains. Positive are most prevalent (54.5%), followed by hyper-arid (28.9%), while also dominate (54.6%), semiarid (27.6%). Cross-correlation synchronous NDVI–WTD changes at 95% grid points, 5% exhibiting time lags (1–3 months), localized hydrogeological feedback. Notably, 32% overlap groundwater-dependent ecosystems (GDEs). GAM 87.9% spatial variability attributed to environmental factors, (26.6%) hydrogeology (19.5%) as dominant contributors. These findings provide critical insights into offer valuable implications for sustainable resource management.

Language: Английский

Citations

0
The Unexploited Treasures of Hydrological Observations Beyond Streamflow for Catchment Modeling DOI Creative Commons
Paul D. Wagner, Doris Duethmann, Jens Kiesel

et al.

Wiley Interdisciplinary Reviews Water, Journal Year: 2025, Volume and Issue: 12(2)

Published: March 1, 2025

ABSTRACT While measured streamflow is commonly used for hydrological model evaluation and calibration, an increasing amount of data on additional variables available. These have the potential to improve process consistency in modeling consequently predictions under change, as well data‐scarce or ungauged regions. Here, we show how these beyond are currently calibration. We consider storage flux variables, namely snow, soil moisture, groundwater level, terrestrial water storage, evapotranspiration, altimetric level. aim at summarizing state‐of‐the‐art providing guidance use Based a review current literature, summarize observation methods uncertainties available sets, challenges regarding their implementation, benefits consistency. The focus catchment studies with study areas ranging from few km 2 ~500,000 . discuss implementing alternative that related differences spatio‐temporal resolution observations models, variable‐specific features, example, discrepancy between observed simulated variables. further advancements required deal integrate multiple, potentially inconsistent datasets. increased improvement shown by most reviewed often come cost slight decrease performance.

Language: Английский

Citations

0