Assessing impacts of alternative land use strategies on water partitioning, storage and ages in drought‐sensitive lowland catchments using tracer‐aided ecohydrological modelling

Hydrological Processes, Journal Year: 2024, Volume and Issue: 38(4)

Published: April 1, 2024

Abstract Continuing negative rainfall anomalies, coupled with climate change projections of increased drought severity and frequency, drive an urgent need to increase resilience integration in land water management strategies many regions the world. However, complex interactions between cover change, ecohydrological partitioning availability are difficult quantify, especially at different temporal spatial scales. In conjunction local stakeholders, we developed plausible, alternative use scenarios (including forest diversification agroforestry schemes) based on existing four primary types (i.e., conifer broadleaved forests, arable agriculture, pasture) a 66 km 2 drought‐sensitive catchment northern Germany. We used modelling evaluate changes flux partitioning, storage ages. The spatially‐distributed, tracer‐aided model, EcH O‐iso, calibrated using hydrometric, isotopic data daily time steps from 2007 2019 was this assessment. results showed that replacing forests uneven‐aged mixed younger broad‐leaved trees had greatest potential for reducing total evapotranspiration increasing groundwater recharge. For coniferous 50% proportion projected result 11% recharge across catchment. mixed‐forest alternatives also reduced turnover times, which would support more rapid recovery soil moisture stores following droughts. This study demonstrates such approach has contribute useful science‐based evidence policy makers allowing quantitative assessment effects effective communication stakeholders.

Language: Английский

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Recent Developments and Emerging Challenges in Tracer‐Aided Modeling

Wiley Interdisciplinary Reviews Water, Journal Year: 2025, Volume and Issue: 12(2)

Published: March 1, 2025

ABSTRACT During the last decade, tracer‐aided hydrological models (TAMs) have been applied in numerous studies and successfully evolved for different purposes. Such confirmed value of tracer data modeling, offering insights into internal storages, water sources, flow pathways, mixing processes, ages, which cannot be derived from hydrometric alone. The direct coupling tracers flux tracking balance can reduce model uncertainty through increased biogeochemical process knowledge. More specifically, such simultaneously capture celerity responses with velocities (and age) particles. As a result availability high‐resolution characterizing functioning across Critical Zone entire landscapes, together rapid improvement computing capacity, four major advances reshaped capability TAMs, we review this paper: (1) enhanced representation spatial heterogeneity, (2) more explicit conceptualization ecohydrological partitioning, (3) application to larger catchment scales, (4) incorporation non‐conservative coupled quality modeling. However, persistent challenges also emerged, particularly relation acquisition, mismatches between information content scale application, uncertainties structures, as well adaptation multi‐criteria calibration. In review, recent remaining TAMs summarized discussed particular focus on conservative models.

Language: Английский

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The Observed Isotopic Errors in Extreme Precipitation Leads to Overestimation of Long‐Term Soil‐Streamflow Hydrological Connectivity

Hydrological Processes, Journal Year: 2025, Volume and Issue: 39(4)

Published: April 1, 2025

ABSTRACT The tracer‐aided modelling has gained widespread attention in recent years as a crucial approach for investigating watershed hydrological functions. However, errors model inputs, such precipitation, evapotranspiration (ET) and isotopes can lead to uncertainty physically meaningful parameters, which, turn, affects the accurate depiction of In this study, we focused on Hemuqiao watershed, typical humid mountainous region southeast China, equipped with intensive isotopic monitoring. Two Reservoirs StorAge Selection (TRSAS) was adopted explore impact input data understanding connectivity preferential flow. results show that observation precipitation ET do not significantly reduce performance (with optimal NSE value decreasing by up 0.05). they increase simulation primarily due associated large events. contrast, observed particularly during extreme events, meanwhile significant differences some parameters compared no error data. Although proportion young water fraction streamflow does noticeable difference, proportions lateral subsurface flow tend be overestimated (i.e., approximately 0.14 0.08, respectively, average over long term). This an overestimation between soil streamflow. These findings suggest models, improving accuracy is more critical accurately processes than enhancing spatial observations ET.

Language: Английский

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The Unexploited Treasures of Hydrological Observations Beyond Streamflow for Catchment Modeling

Wiley Interdisciplinary Reviews Water, Journal Year: 2025, Volume and Issue: 12(2)

Published: March 1, 2025

ABSTRACT While measured streamflow is commonly used for hydrological model evaluation and calibration, an increasing amount of data on additional variables available. These have the potential to improve process consistency in modeling consequently predictions under change, as well data‐scarce or ungauged regions. Here, we show how these beyond are currently calibration. We consider storage flux variables, namely snow, soil moisture, groundwater level, terrestrial water storage, evapotranspiration, altimetric level. aim at summarizing state‐of‐the‐art providing guidance use Based a review current literature, summarize observation methods uncertainties available sets, challenges regarding their implementation, benefits consistency. The focus catchment studies with study areas ranging from few km 2 ~500,000 . discuss implementing alternative that related differences spatio‐temporal resolution observations models, variable‐specific features, example, discrepancy between observed simulated variables. further advancements required deal integrate multiple, potentially inconsistent datasets. increased improvement shown by most reviewed often come cost slight decrease performance.

Language: Английский

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Synoptic water isotope surveys to understand the hydrology of large intensively managed catchments

Journal of Hydrology, Journal Year: 2023, Volume and Issue: 623, P. 129817 - 129817

Published: June 15, 2023

Language: Английский

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Integrating Tracers and Soft Data Into Multi‐Criteria Calibration: Implications From Distributed Modeling in a Riparian Wetland

Water Resources Research, Journal Year: 2023, Volume and Issue: 59(11)

Published: Nov. 1, 2023

Abstract Calibrating distributed hydrological models often leads to equifinality due complex model structures, which can be further exacerbated in wetlands spatio‐temporal heterogeneity ecohydrological processes. Here, step‐wise calibrations of the physically‐based EcH 2 O‐iso was conducted a data‐rich wetland by minimizing weighted average errors on discharge, stream isotopes, groundwater (GW) and soil moisture. Results showed multi‐criteria calibration outperformed single‐criterion as it strongly increased overall performance, yet only marginally degraded performance each target. Isotopes were highlighted appropriate auxiliary data they effectively constrained with relatively small weights (0.1). However, those parameter sets that minimize could still lead physically implausible simulations uncalibrated internal states or fluxes. This demonstrated an approach developed check fluxes based soft (transpiration lateral flow), suggesting 54% optimized gave “right answers for wrong reasons.” By excluding against data, such equifinality, unraveled potential inconsistencies between observations calibration. Modeling represented slow‐draining system mainly fed GW, but also influenced near‐surface flow during winter summer convectional events. Further, functioning partly attributed distinct evapotranspiration patterns contrasting vegetation communities. Therefore, this study not provided insights into functioning, revealed even abundant calibration, solutions integration isotopes data.

Language: Английский

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Conceptual approach for a holistic low‐flow risk analysis

Hydrological Processes, Journal Year: 2024, Volume and Issue: 38(6)

Published: June 1, 2024

Abstract Low‐flow events, characterized by a significant water deficiency in river systems, have profound impacts on various users and ecology. Recent low‐flow events Europe had severe economic ecological consequences such as disruptions to hydropower production, irrigation bans, constraints navigation complete drying. These highlight the urgent need for effective risk management demand holistic analysis basis. The existing approaches often focus hydrological aspects, utilizing indices Standardized Runoff Index (SRI) or . However, these lack information regarding impacts. Other consider parts of approach but special economy; general, no assessment is made. This study introduces conceptual analysis. provides continuous long‐term simulation capture behaviour therefore avoids complex definition scenarios. In this approach, analysed using combination analyses that cover all aspects from occurrence consequences. Meteorological used generate synthetic weather data time series, which are transformed into runoff series Based results, hydrodynamic quantifies levels, temperatures, flow velocities along river. terms socio‐economic results represent damage values. Finally, values summed divided number years considered For testing demonstration purposes, presented partly applied proof‐of‐concept at Selke catchment, small catchment Germany. presented, evaluated, discussed.

Language: Английский

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Linking terrestrial biogeochemical processes and water ages to catchment water quality: A new Damköhler analysis based on coupled modeling of isotope tracers and nitrate dynamics

Water Research, Journal Year: 2024, Volume and Issue: 262, P. 122118 - 122118

Published: July 20, 2024

Language: Английский

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Can temperature be a low-cost tracer for modelling water age distributions in a karst catchment?

Journal of Hydrology, Journal Year: 2024, Volume and Issue: unknown, P. 131947 - 131947

Published: Sept. 1, 2024

Language: Английский

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Improving process-consistency of an ecohydrological model through inclusion of spatial patterns of satellite-derived land surface temperature

Journal of Hydrology, Journal Year: 2023, Volume and Issue: 628, P. 130433 - 130433

Published: Nov. 14, 2023

Language: Английский

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