James Buttle Review: The Characteristics of Baseflow Resilience Across Diverse Ecohydrological Terrains

Hydrological Processes, Journal Year: 2025, Volume and Issue: 39(3)

Published: March 1, 2025

ABSTRACT The dynamic storage of aquifers is the portion groundwater that can potentially drain to any given point along a stream create baseflow. Baseflow typically occurs year‐round in perennial streams, though characteristics and stability are often most important instream processes during extended dry periods (without precipitation snowmelt) when runoff quickflows minimised. term ‘baseflow resilience’ defined for this review as tendency baseflow streams maintain consistent volume water quality year while under stress from climate variability extremes, with anthropogenic stressors such withdrawals, land use change, degradation. ‘Baseflow has, part, user‐defined meaning spanning supply variables primary interest. Watershed directly impact resilience produce non‐intuitive feedbacks enhance some attributes simultaneously impairing others. For example, permeable corridor geology creates strong stream‐groundwater hydrologic connectivity, yet fast drainage via preferential high‐permeability flowpaths lead streamflow not being sustained periods. Also, shallow sources generally more immediately vulnerable extreme events, warming, salinization, transpiration, drought, compared deeper groundwater. Yet drought influenced by lag years, contaminant legacies may propagate through deep receiving waters decades centuries. Finally, irrigation withdrawals intercept would have drained application leach contaminants soil zone unnaturally raising tables, return flows sustain groundwater‐dependent habitats semiarid areas. This covers concept context summarises common hydrogeological controls on, multiscale of, storage. Further, we present several quantitative metrics assess range using both broadly available boutique data types, subset which demonstrated Delaware River Basin, USA.

Language: Английский

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Long-term field observations of the impacts of drought and stand development on runoff in a forested watershed

Agricultural and Forest Meteorology, Journal Year: 2025, Volume and Issue: 367, P. 110519 - 110519

Published: March 30, 2025

Language: Английский

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Restoring Historic Forest Disturbance Frequency Would Partially Mitigate Droughts in the Central Sierra Nevada Mountains

Water Resources Research, Journal Year: 2025, Volume and Issue: 61(4)

Published: April 1, 2025

Abstract Forest thinning and prescribed fire are expected to improve the climate resilience water security of forests in western U.S., but few studies have directly modeled hydrological effects multi‐decadal landscape‐scale forest disturbance. By updating a distributed process‐based model (DHSVM) with vegetation maps from ecosystem (LANDIS‐II), we simulate resource impacts management scenarios targeting partial or full restoration pre‐colonial disturbance return interval central Sierra Nevada mountains. In fully restored regime that includes fire, thinning, insect mortality, reservoir inflow increases by 4%–9% total 8%–14% dry years. At sub‐watershed scales (10–100 km 2 ), dense can increase streamflow >20% thinner forest, increased understory transpiration compensates for decreased overstory transpiration. Consequentially, 73% gains attributable rain snow interception loss. Thinner headwater peak flows, reservoir‐scale flows almost exclusively influenced climate. Uncertainty future precipitation causes high uncertainty yield, additional yield is about five times less sensitive annual uncertainty. This decoupling response makes especially valuable supply during Our study confidence benefits restoring historic frequencies mountains, our modeling framework widely applicable other forested mountain landscapes.

Language: Английский

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Can large-scale tree cover change negate climate change impacts on future water availability?

Hydrology and earth system sciences, Journal Year: 2025, Volume and Issue: 29(7), P. 1895 - 1918

Published: April 15, 2025

Abstract. The availability of fresh water over land may become increasingly scarce under climate change (CC), and natural human-induced tree cover changes can further enhance or negate the scarcity. Previous studies showed that global have large impacts on current conditions, but they did not touch upon implications change. Here, we study hydrological large-scale (climate-induced in combination with afforestation) a future (SSP3-7.0) following an interdisciplinary approach. By combining data from five Coupled Model Intercomparison Project phase 6 (CMIP6) models potential dataset, six Budyko models, UTrack moisture recycling disentangle evapotranspiration, precipitation, runoff. We quantify per grid cell for selected river basins (Yukon, Mississippi, Amazon, Danube, Murray–Darling) if counteract climate-driven runoff due to their impact evapotranspiration recycling. Globally averaged, be similar magnitude opposite signs. While increase runoff, estimate could reverse this effect, which result limited net relative present cover. Nevertheless, local substantial, increases decreases more than 100 mm yr−1. show that, approximately 16 % surface, significantly. However, 14 both decrease by 5 For each catchments, direction vary, dominating all except Mississippi River basin. Our results ecosystem restoration projects targeting altered should consider corresponding limit unwanted (non-)local reductions availability.

Language: Английский

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InVEST Model-Based Estimation of Water Yield in North China and Its Sensitivities to Climate Variables

Water, Journal Year: 2020, Volume and Issue: 12(6), P. 1692 - 1692

Published: June 12, 2020

A revegetation program in North China could potentially increase carbon sequestration and mitigate climate change. However, the responses of water yield ecosystem services to factors are still unclear among different vegetation types, which is critically important select appropriate species for revegetation. Based on Integrated Valuation Ecosystem Services Tradeoffs (InVEST) model, we estimated temporal variations associated China. The result showed that InVEST model performed well estimation (R2 = 0.93), thus can be successfully applied across study area. total 6.19 × 1010 m3/year, with a mean (MWY) 47.15 mm/year. large spatial difference MWY was found, strongly related temperature, precipitation, land use types. annual precipitation (MAP) closely tied temperature conditions forests grasslands. sensitivities variables indicated fluctuation had positive influence forest humid regions, grassland enhanced warmer regions. We suggest shrub grass would more suitable programs improve capacity, warming might grasslands regions

Language: Английский

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Wildfire controls on evapotranspiration in California’s Sierra Nevada

Journal of Hydrology, Journal Year: 2020, Volume and Issue: 590, P. 125364 - 125364

Published: Aug. 3, 2020

Language: Английский

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Increasing wildfire impacts on snowpack in the western U.S.

Proceedings of the National Academy of Sciences, Journal Year: 2022, Volume and Issue: 119(39)

Published: Sept. 19, 2022

Wildfire area has been increasing in most ecoregions across the western United States, including snow-dominated regions. These fires modify snow accumulation, ablation, and duration, but sign magnitude of these impacts can vary substantially between This study compares spatiotemporal patterns States wildfires zones. Results demonstrate significant increases wildfire from 1984 to 2020 throughout West, Sierra Nevada, Cascades, Basin Range, Northern Southern Rockies. In late zone, where mean annual snow-free date is May or later, 70% experienced since 1984. The distribution burned shifted earlier melt zones later-melt several ecoregions, Rockies, zone during exceeded total over previous 36 y combined. Snow measurements at a large Rockies fire revealed that burning caused lower peak snow-water equivalent as well an 18–24 d estimated advance dates. Latitude, proxy for solar radiation, dominant driver date, advances timing through more-positive net shortwave radiation balance. loss reduce both ecosystem water availability streamflow generation region relies heavily on mountain snowpack supply.

Language: Английский

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Predicting wildfire induced changes to runoff: A review and synthesis of modeling approaches

Wiley Interdisciplinary Reviews Water, Journal Year: 2022, Volume and Issue: 9(5)

Published: May 16, 2022

Abstract Wildfires elicit a diversity of hydrological changes, impacting processes that drive both water quantity and quality. As wildfires increase in frequency severity, there is need to assess the implications for response. Wildfire‐related changes operate at three distinct timescales: immediate fire aftermath, recovery phase, long‐term across multiple cycles wildfire regrowth. Different dominant each timescale. Consequentially, models used predict impacts an explicit representation different processes, depending on modeling objectives impact We summarize existing data‐driven, conceptual, physically based runoff, identifying assumptions, process representations, timescales, key limitations model type. Given substantial observed projected regimes associated impacts, it likely will become increasingly important. This due their capacity simulate simultaneous use physical biological principles support extrapolation beyond historical record. Yet benefits are moderated by higher data requirements lower computational speed. argue advances predicting from come through combining these with new computationally faster conceptual reduced‐order models. The aim combine strengths overcome weaknesses types, enabling simulations critical resources scenarios representing wildfire‐induced runoff. article categorized under: Water Life > Conservation, Management, Awareness Science Hydrological Processes Environmental Change

Language: Английский

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Streamflow Response to Wildfire Differs With Season and Elevation in Adjacent Headwaters of the Lower Colorado River Basin

Water Resources Research, Journal Year: 2022, Volume and Issue: 58(3)

Published: March 1, 2022

Abstract Fires increasingly impact forested watersheds, with uncertain water resources impacts. While research has revealed higher peak flows, longer‐term yields may increase or decrease following fire, and the mechanisms regulating post‐fire streamflow are little explored. Hydrologic response to disturbance is poorly understood in Lower Colorado River Basin (LCRB), where snowmelt often occurs before growing season. Here, we quantify annual changes what have been, 2020, two of largest wildfires modern history contiguous United States. We evaluate nine nested watersheds >50 years records within Salt fire over ranges elevation, climate, vegetation, burned area, spatial scale. employ double‐mass comparison paired pre‐ runoff ratio comparison, multiple linear regression climate time‐trend analysis. Precipitation decoupled during dry periods; therefore conduct separate change detection for wet periods. Post‐fire summer increased by 24%–38% at all elevations. winter/spring remained constant highest, coldest headwaters, winter flows declined lower‐elevation headwaters. As a result, basin declined. These results support emerging understanding that warm semiarid respond differently than well‐studied, colder watersheds. Asynchrony between evaporative demand likely important when considering long‐term impacts forest management on supply LCRB.

Language: Английский

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Statistical Attribution of the Influence of Urban and Tree Cover Change on Streamflow: A Comparison of Large Sample Statistical Approaches

Water Resources Research, Journal Year: 2022, Volume and Issue: 58(5)

Published: April 26, 2022

Abstract The strengths and weaknesses of different statistical methodologies for attributing changes in streamflow to land cover are still poorly understood. We examine the relationships between high ( Q 99 ), mean low 01 ) urbanization or tree change 729 catchments United States 1992 2018. apply two modeling approaches compare their performance. Panel regression models estimate average effect on across all sites, show that average, a 1%‐point increase catchment urban area results small (0.6%–0.7%), but highly significant flows. Meanwhile, does not correspond strongly flow. also fit generalized linear model each individual site, which varied coefficients. medians single‐site coefficients no either any quantile (although at may be statistically positive negative). On other hand, GLM provide greater nuance with specific attributes. This variation is well represented through panel estimates effect, unless moderators carefully considered. highlight value large‐sample attribution hydrological change, while cautioning considerable variability exists.

Language: Английский

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