Assessing placement bias of the global river gauge network

Nature Sustainability, Journal Year: 2022, Volume and Issue: 5(7), P. 586 - 592

Published: April 25, 2022

Language: Английский

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Hydrological Intensification Will Increase the Complexity of Water Resource Management

Earth s Future, Journal Year: 2022, Volume and Issue: 10(3)

Published: March 1, 2022

Abstract Global warming intensifies the hydrological cycle by altering rate of water fluxes to and from terrestrial surface, resulting in an increase extreme precipitation events longer dry spells. Prior intensification work has largely focused on without joint consideration evaporative demand changes how plants respond these changes. Informed state‐of‐the‐art climate models, we examine projected its role complicating resources management using a framework that accounts for surplus demand. Using metric combines difference between daily (surplus events) consecutive days when exceeds (deficit time), show that, globally, will become larger (+11.5% +18.5% moderate high emission scenarios, respectively) duration them (+5.1%; +9.6%) end century, with largest northern latitudes. The intra‐annual occurrence extremes stress existing infrastructure major river basins, where over one third years during 2070–2100 under emissions scenario be hydrologically intense (large increases intensity deficit tripling historical baseline. Larger are found basins large reservoir capacity (e.g., Amazon, Congo, Danube River Basins), which have significant populations, irrigate considerable farmland, support threatened endangered aquatic species. Incorporating flexibility into resource paramount continued intensification.

Language: Английский

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River water quality shaped by land–river connectivity in a changing climate

Nature Climate Change, Journal Year: 2024, Volume and Issue: 14(3), P. 225 - 237

Published: March 1, 2024

Language: Английский

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Advancing the science of headwater streamflow for global water protection

Nature Water, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Language: Английский

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Anthropogenically driven climate and landscape change effects on inland water carbon dynamics: What have we learned and where are we going?

Global Change Biology, Journal Year: 2022, Volume and Issue: 28(19), P. 5601 - 5629

Published: July 20, 2022

Abstract Inland waters serve as important hydrological connections between the terrestrial landscape and oceans but are often overlooked in global carbon (C) budgets Earth System Models. Terrestrially derived C entering inland from watershed can be transported to over 83% is either buried sediments or emitted atmosphere before reaching oceans. Anthropogenic pressures such climate changes altering magnitude of these fluxes waters. Here, we synthesize most recent estimates differential contributions across waterbody types (rivers, streams, lakes, reservoirs, ponds), including measurements that incorporate improved sampling methods, small waterbodies, dried areas. Across all waters, report a emission estimate 4.40 Pg C/year (95% confidence interval: 3.95–4.85 C/year), representing 13% increase estimate. We also review mechanisms by which globally widespread anthropogenically driven influence water fluxes. The majority drivers expected inputs due alterations quality quantity, pathways, biogeochemical processing. recommend four research priorities for future study anthropogenic fluxes: (1) before‐and‐after associated with change events changes, (2) better quantification input land, (3) assessment spatial coverage waterbodies fluxes, (4) integration drawdown areas flux estimates. Improved uncertainty will vital understanding both losses “moving target” emissions response rapid complex pressures.

Language: Английский

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Causes, Responses, and Implications of Anthropogenic versus Natural Flow Intermittence in River Networks

BioScience, Journal Year: 2022, Volume and Issue: 73(1), P. 9 - 22

Published: Dec. 7, 2022

Abstract Rivers that do not flow year-round are the predominant type of running waters on Earth. Despite a burgeoning literature natural intermittence (NFI), knowledge about hydrological causes and ecological effects human-induced, anthropogenic (AFI) remains limited. NFI AFI could generate contrasting biological responses in rivers because distinct underlying drying evolutionary adaptations their biota. We first review show how different drivers alter timing, frequency duration drying, compared with NFI. Second, we evaluate possible differences biodiversity responses, functions, ecosystem services between AFI. Last, outline gaps management needs related to Because hydrologic characteristics impacts AFI, ignoring distinction undermine intermittent ephemeral streams exacerbate risks ecosystems societies downstream.

Language: Английский

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Climate Controls on River Chemistry

Earth s Future, Journal Year: 2022, Volume and Issue: 10(6)

Published: May 16, 2022

Abstract How does climate control river chemistry? Existing literature has examined extensively the response of chemistry to short‐term weather conditions from event seasonal scales. Patterns and drivers long‐term, baseline have remained poorly understood. Here we compile analyze data 506 minimally impacted rivers (412,801 points) in contiguous United States (CAMELS‐Chem) identify patterns chemistry. Despite distinct sources diverse reaction characteristics, a universal pattern emerges for 16 major solutes at continental scale. Their long‐term mean concentrations ( C m ) decrease with discharge Q ), elevated arid climates lower humid climates, indicating overwhelming regulation by compared local Critical Zone characteristics such as lithology topography. To understand pattern, parsimonious watershed reactor model was solved bringing together hydrology (storage–discharge relationship) biogeochemical theories traditionally separate disciplines. The derivation steady state solutions lead power law form relationships. illuminates two competing processes that determine solute concentrations: production subsurface chemical weathering reactions, export (or removal) discharge, water flushing capacity dictated vegetation. In other words, watersheds function primarily reactors produce accumulate transporters climates. With space‐for‐time substitution, these results indicate places where dwindles warming climate, will elevate even without human perturbation, threatening quality aquatic ecosystems. Water deterioration therefore should be considered global calculation future risks.

Language: Английский

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Quantifying Streamflow Depletion from Groundwater Pumping: A Practical Review of Past and Emerging Approaches for Water Management

JAWRA Journal of the American Water Resources Association, Journal Year: 2022, Volume and Issue: 58(2), P. 289 - 312

Published: Feb. 15, 2022

Abstract Groundwater pumping can cause reductions in streamflow (“streamflow depletion”) that must be quantified for conjunctive management of groundwater and surface water resources. However, depletion cannot measured directly is challenging to estimate because impacts are masked by variability due other factors. Here, we conduct a management‐focused review analytical, numerical, statistical models estimating highlight promising emerging approaches. Analytical easy implement, but include many assumptions about the stream aquifer. Numerical widely used assessment represent processes affecting streamflow, have high data, expertise, computational needs. Statistical approaches historically underutilized tool difficulty attributing causality, causal inference techniques merit future research development. We propose depletion‐related questions divided into three broad categories (attribution, impacts, mitigation) influence which methodology most appropriate. then develop decision criteria method selection based on suitability local conditions goal, actionability with current or obtainable data resources, transparency respect process uncertainties, reproducibility.

Language: Английский

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Going Beyond Low Flows: Streamflow Drought Deficit and Duration Illuminate Distinct Spatiotemporal Drought Patterns and Trends in the U.S. During the Last Century

Water Resources Research, Journal Year: 2022, Volume and Issue: 58(9)

Published: Aug. 30, 2022

Abstract Streamflow drought is a recurring challenge, and understanding spatiotemporal patterns of past droughts needed to manage future water resources. We examined regional in streamflow metrics compared these low flow timing magnitude using long‐term daily records for 555 minimally disturbed watersheds. For each streamgage, we calculated duration (number days) deficit (flow volume below specified threshold) climate year (April 1–March 31). identified five thresholds (2%–30%) two approaches: variable with unique values day the year, fixed threshold based on all period‐of‐record flows. then analyzed trends Mann‐Kendall test persistence adjustment 1921–2020, 1951–2020, 1981–2020, computed correlations between annual from monthly balance model. Spatial were consistent approaches, though durations typically longer deficits larger. High interannual variability emerged central, interior west, southwestern U.S., high west. Drought weakly correlated timing, providing information. increased southern western U.S. both 1951–2020 particularly thresholds, paralleled aridity. Projections continued aridification may increase intensify availability impacts.

Language: Английский

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Non-perennial segments in river networks

Nature Reviews Earth & Environment, Journal Year: 2023, Volume and Issue: 4(12), P. 815 - 830

Published: Nov. 23, 2023

Language: Английский

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