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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Drought and groundwater management: Interconnections, challenges, and policyresponses

Current Opinion in Environmental Science & Health, Journal Year: 2022, Volume and Issue: 28, P. 100364 - 100364

Published: May 14, 2022

Droughts have severe impacts on the economy, society, and environment. They also groundwater vice versa. While most analyses consider drought as disconnected, we argue that management should be conjunctively considered. This article presents some key interconnections, identifies challenges, discusses illustrative policy responses. We highlight several advancements found in international scientific research describe future directions for management. many technological innovations improved our understanding of groundwater's complex nature, governance advances not kept pace.

Language: Английский

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The Drying Regimes of Non‐Perennial Rivers and Streams

Geophysical Research Letters, Journal Year: 2021, Volume and Issue: 48(14)

Published: July 1, 2021

Abstract The flow regime paradigm is central to the aquatic sciences, where drives critical functions in lotic systems. Non‐perennial streams comprise majority of global river length, thus we extended this stream drying. Using 894 USGS gages, isolated 25,207 drying events from 1979 2018, represented by a streamflow peak followed no flow. We calculated hydrologic signatures for each event and using multivariate statistics, grouped into regimes characterized by: (a) fast drying, (b) long no‐flow duration, (c) prolonged following low antecedent flows, (d) without distinctive signature. 77% gages had more than one at different times within study period. Random forests revealed land cover/use are important how dries climate or physiographic characteristics. Clustering behavior may allow practitioners systematically adapt water resource management practices specific rivers.

Language: Английский

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Modelling ecohydrological feedbacks in forest and grassland plots under a prolonged drought anomaly in Central Europe 2018–2020

Hydrological Processes, Journal Year: 2021, Volume and Issue: 35(8)

Published: July 27, 2021

Abstract Recent studies have highlighted the importance of understanding ecohydrological drought feedbacks to secure water resources under a changing climate and increasing anthropogenic impacts. In this study, we monitored modelled in soil–plant‐atmosphere continuum European summer 2018 following 2 years. The physically based, isotope‐aided model EcH O‐iso was applied generic vegetation plots (forest grassland) lowland, groundwater‐dominated research catchment Demnitzer Millcreek (NE Germany; 66 km ). We included, inter alia, soil isotope data calibration quantified “blue” (groundwater recharge) “green” (evapotranspiration) fluxes ages each land use as progressed. Novel plant xylem were excluded from but compared with simulated root uptake signatures validation. Results indicated inter‐site differences dynamics storage contrasting age both during subsequent Forest consistently showed greater moisture stress, more rapid recovery higher variability depths generally younger storage. contrast, grassland site, which had water‐retentive soils, older groundwater recharge fluxes. damped flux led slower return at depth. Such evidence‐based quantitative stress soil‐vegetation units provide important insights into Critical Zone cycling. This can help inform future progress monitoring, modelling development mitigation strategies drought‐sensitive lowlands.

Language: Английский

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Review article: Drought as a continuum – memory effects in interlinked hydrological, ecological, and social systems

Natural hazards and earth system sciences, Journal Year: 2024, Volume and Issue: 24(9), P. 3173 - 3205

Published: Sept. 23, 2024

Abstract. Droughts are often long-lasting phenomena, without a distinct start or end and with impacts cascading across sectors systems, creating long-term legacies. Nevertheless, our current perceptions management of droughts their event-based, which can limit the effective assessment drought risks reduction impacts. Here, we advocate for changing this perspective viewing as hydrological–ecological–social continuum. We take systems theory focus on how “memory” causes feedback interactions between parts interconnected at different timescales. first discuss characteristics continuum hydrological, ecological, social separately, then study system systems. Our analysis is based review literature five cases: Chile, Colorado River basin in USA, northeast Brazil, Kenya, Rhine northwest Europe. find that memories past dry wet periods, carried by both bio-physical (e.g. groundwater, vegetation) people, governance), influence future risk manifests. identify four archetypes dynamics: impact recovery, slow resilience building, gradual collapse, high resilience–big shock. The result shifting these types, plays out differently case studies. call more research preconditions recovery dynamics triggering changes, dynamic vulnerability maladaptation. Additionally, continuous monitoring hazards impacts, modelling tools better incorporate adaptation responses, strategies increase societal institutional memory. This will help us to deal complex pathways mitigation.

Language: Английский

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Review article: Drought as a continuum: memory effects in interlinked hydrological, ecological, and social systems

Published: Feb. 20, 2024

Abstract. Droughts are often long lasting phenomena, without a distinct start or end, and with impacts cascading across sectors systems, creating long-term legacies. Nevertheless, our current perception management of droughts their is event-based, which can limit the effective assessment drought risks reduction impacts. Here, we advocate for changing this perspective viewing as hydro-eco-social continuum. We take systems theory focus on how “memory” causes feedback interactions between parts interconnected at different time scales. first discuss characteristics continuum hydrological, ecological, social separately; then study system systems. Our analysis based review literature five cases: Chile, Colorado River Basin in US, Northeast Brazil, Kenya, Rhine Northwest Europe. find that memories past dry wet periods, carried by both bio-physical (e.g. groundwater, vegetation) people, governance), influence future risk manifests. identify four archetypes dynamics: Impact & recovery; Slow resilience-building; Gradual collapse; High resilience, big shock. The ecological result shifting these types, plays out differently case studies. call more research pre-conditions recovery dynamics triggering changes, dynamic vulnerability maladaptation. Additionally, argue continuous monitoring hazards impacts, modelling tools better incorporate adaptation responses, strategies increase institutional memory to deal complex pathways adaptation.

Language: Английский

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Evaluating satellite-derived soil moisture data for improving the internal consistency of process-based ecohydrological modelling

Journal of Hydrology, Journal Year: 2022, Volume and Issue: 614, P. 128462 - 128462

Published: Sept. 21, 2022

Language: Английский

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Isotope hydrology and water sources in a heavily urbanized stream

Hydrological Processes, Journal Year: 2021, Volume and Issue: 35(10)

Published: Sept. 10, 2021

Abstract Complex networks of both natural and engineered flow paths control the hydrology streams in major cities through spatio‐temporal variations connection disconnection diverse water sources. We used spatially extensive temporally intensive sampling stable isotopes to disentangle hydrological sources heavily urbanized Panke catchment (~220 km 2 ) north Berlin, Germany. The isotopic data enabled us partition stream across using a Bayesian mixing analysis. upper part streamflow is dominated by groundwater (~75%) from gravel aquifers. In dry summer periods, becomes intermittent catchment, possibly as result local abstractions. Storm drainage dominates responses precipitation events. Although such events can dramatically change composition network, storm only accounts for 10%–15% annual streamflow. Moving downstream, subtle changes isotope signatures occur characteristics vary affected different tributaries. However, effluents wastewater treatment plant (WWTP), serving 700,000 people, dominate lower (~90% runoff) where urbanization effects are more dramatic. associated increase sealed surfaces downstream also reduces relative contribution volume runoff again urban drainage, though still about 10% comes drains. study shows potential inexpensive tracers catchments that provide integrated understanding complex cities. This offers an important evidence base guiding plans develop re‐develop protect, restore, enhance their ecological amenity value.

Language: Английский

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Critical Zone Response Times and Water Age Relationships Under Variable Catchment Wetness States: Insights Using a Tracer‐Aided Ecohydrological Model

Water Resources Research, Journal Year: 2022, Volume and Issue: 58(4)

Published: March 3, 2022

Abstract The dynamic relationships between water flux and storage, together with the associated ages speed of hydrological responses (as proxies for velocity celerity respectively) are fundamental to understanding how catchments react hydroclimate perturbations, such as floods droughts. Using results from a calibrated, tracer‐aided ecohydrological model (EcH 2 O‐iso) we analyzed dynamics storage‐flux‐age‐response time (RT) interactions at scales that resolve internal heterogeneity these non‐stationary relationships. EcH O‐iso has previously shown an adequate representation partitioning storage (celerity), (velocity) over 11‐year Demnitzer Millcreek catchment (DMC, 66 km ), drought‐sensitive, lowland in Germany. period had marked hydroclimatic contrasts facilitating evaluation flux‐storage‐age‐RT under different wetness anomalies. Our show spatio–temporal variability soil moisture reflect both land use (especially forest cover) distinct units (i.e., brown earth vs. podzolic soils). Spatial differences RTs were driven by rapid evaporation transpiration rainfall, which revealed divergence RTs. groundwater streamflow fast (days), but mediation caused separation (years‐decades) deeper flow paths. Analysis degradation process coarsening spatial resolution. This study uses novel analysis spatio‐temporal understand sensitivity resilience functionality perturbations.

Language: Английский

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Effects of 66 years of water management and hydroclimatic change on the urban hydrology and water quality of the Panke catchment, Berlin, Germany

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 900, P. 165764 - 165764

Published: July 27, 2023

Language: Английский

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