Changes in Water Age During Dry‐Down of a Non‐Perennial Stream

Water Resources Research, Journal Year: 2024, Volume and Issue: 60(1)

Published: Jan. 1, 2024

Abstract Non‐perennial streams, which lack year‐round flow, are widespread globally. Identifying the sources of water that sustain flow in non‐perennial streams is necessary to understand their potential impacts on downstream resources, and guide policy management. Here, we used isotopes (δ 18 O δ 2 H) two different modeling approaches investigate spatiotemporal dynamics young fractions ( F yw ) a stream network at Konza Prairie (KS, USA) during 2021 summer dry‐down season, as well over several years with varying hydrometeorological conditions. Using Bayesian model, found substantial amount : 39.1–62.6%) sustained flows headwaters catchment outlet year, while 2015–2022 contributions estimated using sinusoidal models indicated smaller amounts (15.3% ± 5.7). Both indicate releases highly sensitive hydrological conditions, shifting older dries. The shift age suggests away from rapid fracture toward slower matrix creates but localized surface presence late reflected annual outlet. proportion highlights vulnerability short‐term hydroclimatic change, reveals sensitivity longer‐term changes groundwater dynamics. Combined, this local may propagate through networks influence availability quality.

Language: Английский

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Future Climate Change Shifts the Ranges of Major Encroaching Woody Plant Species in the Southern Great Plains, USA

Earth s Future, Journal Year: 2024, Volume and Issue: 12(7)

Published: July 1, 2024

Abstract Woody Plant Encroachment (WPE) is a key driver of grassland collapse in the Southern Great Plain (SGP), resulting series adverse ecological and socioeconomic consequences. Climate change will interact with ongoing WPE as it likely shift potential ranges species. In this study, we employed an ensemble approach integrating results from multiple Species Distribution Models to project future distribution four major species (Ashe juniper, honey mesquite, post oak, eastern redcedar) SGP across 21st century. The findings highlighted noteworthy trend: under climate conditions, for these were projected northward eastward. Of particular concern mesquite significant expansion range, potentially covering up two‐thirds SGP's non‐agricultural area by end Conversely, other three expected experience contraction their ranges. Ashe juniper may decline its current habitats central Texas but gain new northern Texas, Oklahoma, Kansas. suitable oak redcedar shrink eastward, primarily being restricted portions Oklahoma RCP4.5 smaller RCP8.5. provides scientific basis governments optimize allocation management resources implement timely practices control spread woody plants during early encroachment stage. Our study methodology applicable regions continents issues, including Africa, South America, Australia.

Language: Английский

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Unexpected hydrologic response to ecosystem state change in tallgrass prairie

Journal of Hydrology, Journal Year: 2024, Volume and Issue: 643, P. 131937 - 131937

Published: Sept. 1, 2024

Language: Английский

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Multi-decadal fluctuations in root zone storage capacity through vegetation adaptation to hydro-climatic variability have minor effects on the hydrological response in the Neckar River basin, Germany

Hydrology and earth system sciences, Journal Year: 2024, Volume and Issue: 28(17), P. 4011 - 4033

Published: Sept. 3, 2024

Abstract. Climatic variability can considerably affect catchment-scale root zone storage capacity (Sumax), which is a critical factor regulating latent heat fluxes and thus the moisture exchange between land atmosphere as well hydrological response biogeochemical processes in terrestrial systems. However, direct quantification of changes Sumax over long time periods mechanistic drivers thereof at catchment scale are missing so far. As consequence, it remains unclear how climatic variability, such precipitation regime or canopy water demand, affects fluctuations may influence partitioning therefore also scale. Based on long-term daily records (1953–2022) upper Neckar River basin Germany, we found that hydro-climatic conditions, with an aridity index IA (i.e. EP/P) ranging ∼ 0.9 1.1 multiple consecutive 20-year periods, was accompanied by deviations ΔIE −0.02 0.01 from expected IE inferred parametric Budyko curve. Similarly, Sumax, 95 115 mm 20 %, were observed same period. While uncorrelated mean potential evaporation, shown magnitude controlled ratio winter to summer (p < 0.05). In other words, study region does not depend overall wetness condition for example expressed IA, but rather supply distributed year. be ΔIE. Consequently, replacing average, time-invariant estimate time-variable, dynamically changing formulation parameter model did result improved representation fluxes, (and thereof), shorter-term dynamics. Overall, this provides quantitative evidence significantly decades, reflecting vegetation adaptation variability. temporal evolution cannot explain heat) curve different conditions. have any significant effects characteristics catchment. This further suggests accounting time-variable improve its ability reproduce minor importance predicting climate next decades come.

Language: Английский

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Critical zone controls on stream chemistry: Lessons from multiple machine learning methods and irregular data across large watersheds

Journal of Hydrology, Journal Year: 2025, Volume and Issue: unknown, P. 133319 - 133319

Published: April 1, 2025

Language: Английский

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STICr: An open-source package and workflow for Stream Temperature, Intermittency, and Conductivity (STIC) data

Environmental Modelling & Software, Journal Year: 2025, Volume and Issue: unknown, P. 106484 - 106484

Published: April 1, 2025

Language: Английский

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Aspect Differences in Vegetation Type Drive Higher Evapotranspiration on a Pole‐Facing Slope in a California Oak Savanna

Journal of Geophysical Research Biogeosciences, Journal Year: 2024, Volume and Issue: 129(7)

Published: June 26, 2024

Abstract Quantifying evapotranspiration (ET) is critical to accurately predict vegetation health, groundwater recharge, and streamflow generation. Hillslope aspect, the direction a hillslope faces, results in variable incoming solar radiation subsequent water use that drive ET. Previous work watersheds with single dominant type (e.g., trees) have shown equator‐facing slopes (EFS) higher ET compared pole‐facing (PFS) due evaporative demand. However, it remains unclear how differences (i.e., grasses influence partitioning between hillslopes opposing aspects. Here, we quantified root‐zone storage deficits PFS EFS contrasting types within central coastal California. Our suggest cooler oak trees has than warmer grasses, which counter previous landscapes singule type. deficit calculations indicate subsurface larger seasonal dry down EFS. This aspect difference may replenishment of dynamic storage, recharge In addition, on reduce their ability serve as hydrologic refugia for oaks during multi‐year droughts. research provides novel integration field‐based remotely‐sensed estimates required properly quantify hillslope‐scale balances. These findings emphasize importance resolving structure Earth system models, especially diverse types.

Language: Английский

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BioRT‐HBV 1.0: A Biogeochemical Reactive Transport Model at the Watershed Scale

Journal of Advances in Modeling Earth Systems, Journal Year: 2024, Volume and Issue: 16(12)

Published: Nov. 30, 2024

Abstract Reactive Transport Models (RTMs) are essential tools for understanding and predicting intertwined ecohydrological biogeochemical processes on land in rivers. While traditional RTMs have focused primarily subsurface processes, recent watershed‐scale integrated interactions between surface subsurface. These emergent, often spatially explicit require extensive data, computational power, expertise. There is however a pressing need to create parsimonious models that minimal data accessible scientists with limited background. To end, we developed BioRT‐HBV 1.0, watershed‐scale, hydro‐biogeochemical RTM builds upon the widely used, bucket‐type HBV model known its simplicity requirements. uses conceptual structure hydrology output of simulate including advective solute transport reactions depend reaction thermodynamics kinetics. include, example, chemical weathering, soil respiration, nutrient transformation. The time series weather (air temperature, precipitation, potential evapotranspiration) initial conditions water, soils, rocks as input, times rates concentrations waters This paper presents governing equations demonstrates utility examples simulating carbon nitrogen headwater catchment. As shown examples, can be used illuminate dynamics invisible, arduous‐to‐measure subsurface, their influence observed stream or river chemistry export. With easy‐to‐use graphical user interface, useful research tool users without in‐depth training. It additionally serve an educational promotes pollination ideas across disciplines foster diverse, equal, inclusive community.

Language: Английский

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BioRT-HBV 1.0: a Biogeochemical Reactive Transport Model at the Watershed Scale

Authorea (Authorea), Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 18, 2024

Reactive Transport Models (RTMs) are essential for understanding and predicting intertwined ecohydrological biogeochemical processes on land in rivers. While traditional RTMs have focused primarily subsurface processes, recent integrate hydrological interactions between surface subsurface. These emergent, watershed-scale often spatially explicit require large amount of data extensive computational expertise. There is however a pressing need to create parsimonious models that less accessible scientists with background. Here we introduce BioRT-HBV 1.0 (hereafter BioRT), watershed-scale, hydro-biogeochemical model builds upon the widely used, bucket-type HBV (Hydrologiska Bryåns Vattenavdelning), known its simplicity minimal requirements. BioRT uses conceptual structure hydrology output simulate including solute transport reactions driven by reaction thermodynamics kinetics. include, example, chemical weathering, soil respiration, nutrient transformation. This paper presents governing equations, demonstrates utility examples simulating carbon nitrogen headwater catchment. As shown examples, when constrained data, can be used illuminate dynamics invisible, arduous-to-measure subsurface, their connections observed export streams We posit such increase accessibility users without in-depth training. It also serve as an educational tool promote pollination ideas across different fields foster more diverse, equal, inclusive user community.

Language: Английский

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Connecting the Dots: How Ecohydrological Connectivity Can Support Remote Sensing and Modeling to Inform Management of Woody Plant Encroachment

Rangeland Ecology & Management, Journal Year: 2024, Volume and Issue: 95, P. 84 - 99

Published: June 10, 2024

Language: Английский

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