Journal of Hydrology Regional Studies, Journal Year: 2025, Volume and Issue: 57, P. 102153 - 102153
Published: Jan. 5, 2025
Language: Английский
Water Resources Research, Journal Year: 2022, Volume and Issue: 58(11)
Published: Nov. 1, 2022
Abstract Water transit time is now a standard measure in catchment hydrological and ecohydrological research. The last comprehensive review of modeling approaches was published 15+ years ago. But since then the field has largely expanded with new data, theory applications. Here, we these developments focus on water‐age‐balance data‐based approaches. We discuss compare methods including StorAge‐Selection functions, well/partially mixed compartments, water age tracking through spatially distributed models, direct estimates from controlled experiments, young fractions, ensemble hydrograph separation. unify some heterogeneity literature that crept many approaches, an attempt to clarify key differences similarities among them. Finally, point open questions research, what still need theory, work, community practice.
Language: Английский
Citations
91
Biogeosciences, Journal Year: 2021, Volume and Issue: 18(15), P. 4603 - 4627
Published: Aug. 12, 2021
Abstract. We developed a setup for fully automated, high-frequency in situ monitoring system of the stable water isotope deuterium and 18O soil tree xylem. The was tested 12 weeks within an isotopic labeling experiment during large artificial sprinkling including three mature European beech (Fagus sylvatica) trees. Our allowed one measurement every 12–20 min, enabling us to obtain about seven measurements per day each our 15 probes While induced abrupt step pulse signature, it took 7 10 d until signatures at trees' stem bases reached their peak label concentrations 14 8 m height leveled off around same values. During experiment, we observed effects several rain events dry periods on xylem signatures, which fluctuated between measured upper lower horizons. In order explain observations, combined already existing root uptake (RWU) model with newly approach simulate propagation from tips base further up along stem. key proper simulation short-term dynamics isotopes accounting sap flow velocities path length distribution modeling framework identify parameter values that relate depth, horizontal wilting point. insights gained this study can help improve representation trees ecohydrological models prediction transit time age transpiration fluxes.
Language: Английский
Citations
90
Annual Review of Earth and Planetary Sciences, Journal Year: 2023, Volume and Issue: 51(1), P. 277 - 299
Published: Jan. 10, 2023
Landscapes receive water from precipitation and then transport, store, mix, release it, both downward to streams upward vegetation. How they do this shapes floods, droughts, biogeochemical cycles, contaminant the health of terrestrial aquatic ecosystems. Because many key processes occur invisibly in subsurface, our conceptualization them has often relied heavily on physical intuition. In recent decades, however, much intuition been overthrown by field observations emerging measurement methods, particularly involving isotopic tracers. Here we summarize surprises that have transformed understanding hydrological at scale hillslopes drainage basins. These forced a shift perspective process conceptualizations are relatively static, homogeneous, linear, stationary ones predominantly dynamic, heterogeneous, nonlinear, nonstationary. ▪Surprising novel measurements transforming functioning landscapes.▪Even during storm peaks, streamflow is composed mostly stored landscape for weeks, months, or years.▪Streamflow tree uptake originate different subsurface storages seasons’ precipitation.▪Stream networks dynamically extend retract as wets dries, stream reaches lose flow into underlying aquifers.
Language: Английский
Citations
40
The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 893, P. 164763 - 164763
Published: June 10, 2023
Deep rooting is considered a central drought-mitigation trait with vast impact on ecosystem water cycling. Despite its importance, little known about the overall quantitative use via deep roots and dynamic shifts of uptake depths changing ambient conditions. Knowledge especially sparse for tropical trees. Therefore, we conducted drought, soil labeling re-wetting experiment at Biosphere 2 Tropical Rainforest. We used in situ methods to determine stable isotope values tree high temporal resolution. Complemented by stem content sap flow measurements determined percentages quantities deep-water total root dynamics different species. All canopy trees had access (max. depth 3.3 m), contributions transpiration ranging between 21 % 90 during when surface availability was limited. Our results suggest that an essential source delays potentially detrimental drops plant potentials limited could hence mitigate impacts increasing drought occurrence intensity as consequence climate change. Quantitatively, however, amount low due trees' reduction drought. Total largely followed switched back their dynamically, from shallow soils, following rainfall. fluxes were driven precipitation input.
Language: Английский
Citations
32
Journal of Hydrology, Journal Year: 2023, Volume and Issue: 618, P. 129186 - 129186
Published: Jan. 28, 2023
Language: Английский
Citations
27
Journal of Hydrology, Journal Year: 2023, Volume and Issue: 617, P. 129099 - 129099
Published: Jan. 7, 2023
Language: Английский
Citations
25
Journal of Geophysical Research Atmospheres, Journal Year: 2024, Volume and Issue: 129(1)
Published: Jan. 1, 2024
Abstract The products from the Stable Water Isotope Intercomparison Group, Phase 2, are currently used for numerous studies, allowing water isotope model‐data comparisons with various isotope‐enabled atmospheric general circulation model (AGCMs) outputs. However, simulations under this framework were performed using different parameterizations and forcings. Therefore, a uniform experimental design state‐of‐the‐art AGCMs is required to interpret observations rigorously. Here, we evaluate outputs three numerical models nudged by reanalysis investigate ability of reproduce spatial temporal patterns isotopic composition observed at surface in airborne water. Through correlation analyses scales, found that model's performance depends on or use, compare, vertical levels select. Moreover, employed stable mass balance method conduct decomposition ratio changes atmosphere. Our goal was elucidate spread simulated column δ 18 O, which influenced factors such as evaporation, precipitation, horizontal moisture flux. Satisfying law conservation isotopes, budget expected explain fractionation phenomena meteorological climatic events. It also aims highlight spreads modeled results among experiments multiple reanalyses, primarily dominated uncertainties flux respectively.
Language: Английский
Citations
11
Wiley Interdisciplinary Reviews Water, Journal Year: 2024, Volume and Issue: 11(4)
Published: March 5, 2024
Abstract The analysis of the stable isotopic composition hydrogen and oxygen in water samples from soils plants can help to identify sources vegetation uptake. This approach requires that heterogeneous nature plant soil matrices is carefully accounted for during experimental design, sample collection, extraction analyses. comparability shortcomings different methods extracting analyzing have been discussed specialized literature. Yet, despite insightful comparisons benchmarking methodologies laboratories worldwide, community still lacks a roadmap guide extraction, analyses, many practical issues potential users remain unresolved: example, which (soil or plant) pool(s) does extracted represent? These constitute hurdle implementation by newcomers. Here, we summarize discussions led framework COST Action WATSON (“WATer isotopeS critical zONe: groundwater recharge transpiration”—CA19120). We provide guidelines (1) sampling material analysis, (2) laboratory situ (3) measurements composition. highlight importance considering process chain as whole, design minimize biased estimates relative contribution conclude acknowledging some limitations this methodology advice on collection key environmental parameters prior article categorized under: Science Water > Hydrological Processes Environmental Change Extremes
Language: Английский
Citations
10
Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 365, P. 121381 - 121381
Published: June 24, 2024
Present and future climatic trends are expected to markedly alter water fluxes stores in the hydrologic cycle.In addition, demand continues grow due increased human use a growing population.Sustainably managing resources requires thorough understanding of storage flow natural, agricultural, urban ecosystems.Measurements stable isotopes (hydrogen oxygen) cycle (atmosphere, soils, plants, surface water, groundwater) can provide information on transport pathways, sourcing, dynamics, ages, pools that is difficult obtain with other techniques.However, potential these techniques for practical questions has not been fully exploited yet.Here, we outline benefits limitations applications isotope methods useful managers, farmers, stakeholders.We also describe several case studies demonstrating how support management decision-making.Finally, propose workflow guides users through sequence decisions required apply examples issues.We call ongoing dialogue stronger connection between stakeholders practitioners identify most pressing issues develop best-practice guidelines techniques.
Language: Английский
Citations
10
Water Resources Research, Journal Year: 2025, Volume and Issue: 61(2)
Published: Feb. 1, 2025
Abstract The spatial variation of soil water isotopes (SWI)—representing the baseline for investigating root uptake (RWU) depths with stable isotope techniques—has rarely been investigated. Here, we use SWI depth profile sampling in combination unmanned aerial vehicle (UAV) based land surface temperature estimates and vegetation indices (VI) order to improving process understanding relationships between variability content patterns canopy status, represented form VI. We carried out a 10 profiles tropical dry forest. UAV data were collected analyzed obtain detailed characterization status. then performed statistical analysis VI temperatures values at different resolutions (3 cm–5 m). Best used generating isoscapes entire study area. Results suggest that are strongly mediated by parameters (VI). Various correlate across all depths. depend on ( R 2 0.66 δ 18 O 0.64 H). Strongest overall correlations found resolution 0.5 m. speculate this might be ideal spatially characterizing investigate RWU forest environments. Supporting analyses UAV‐based approaches future avenue representation credibility such studies.
Language: Английский
Citations
1