Academic literature on the topic 'Wüstebach Catchment'

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Journal articles on the topic "Wüstebach Catchment"

1

Płaczkowska, Eliza, Karolina Mostowik, Heye Reemt Bogena, and Michael Leuchner. "The Impact of Partial Deforestation on Solute Fluxes and Stream Water Ionic Composition in a Headwater Catchment." Water 15, no. 1 (2022): 107. http://dx.doi.org/10.3390/w15010107.

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To ensure the good chemical status of surface water across Europe, it is necessary to increase research on the comprehensive impact of land use and land cover changes, i.e., deforestation, on the natural environment. For this reason, we used data from 9-year environmental monitoring in the Wüstebach experimental catchment of the TERENO (Terrestrial Environmental Observatories) network to determine the impact of partial deforestation on solute fluxes and stream water ionic composition. In 2013, a partial deforestation experiment was conducted in the study area using a cut-to-length logging method. To this end, two headwater catchments were compared: one partially deforested (22% of the catchment area) and one untreated control catchment. The concentrations of ions in stream water, groundwater, and precipitation were analyzed: Ca2+, Mg2+, Na+, K+, Al3+, Fetot, Mn2+, NO3−, SO4−, and Cl−. Most of the ions (Na+, Ca2+, Mg2+, Cl−, and SO4−) showed decreasing trends in concentrations after deforestation, indicating a dilution effect in stream water due to the reduction of the supply of solutes with precipitation in the open deforested area. The fluxes of these ions decreased by 5–7% in the first year after deforestation, although the stream runoff increased by 5%. In the second year, the decrease in ion fluxes was greater, from 6% to 24%. This finding confirms that only limited soil erosion occurred after the deforestation because the soil was well protected during logging works by covering harvester lanes with branches. Only K+ and NO3− ions showed increasing trends in both concentrations and fluxes in the partially deforested catchment in the first two to three years after deforestation. Spruce die-offs, common in Europe, may decrease the concentration and fluxes of base cations in surface water in a nutrient-limited environment. However, the simultaneous planting of young broad-leaved trees with post-harvesting regrowth could create a nutrient sink that protects the catchment area from nutrient depletion.
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2

Hrachowitz, Markus, Michael Stockinger, Miriam Coenders-Gerrits, et al. "Reduction of vegetation-accessible water storage capacity after deforestation affects catchment travel time distributions and increases young water fractions in a headwater catchment." Hydrology and Earth System Sciences 25, no. 9 (2021): 4887–915. http://dx.doi.org/10.5194/hess-25-4887-2021.

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Abstract. Deforestation can considerably affect transpiration dynamics and magnitudes at the catchment scale and thereby alter the partitioning between drainage and evaporative water fluxes released from terrestrial hydrological systems. However, it has so far remained problematic to directly link reductions in transpiration to changes in the physical properties of the system and to quantify these changes in system properties at the catchment scale. As a consequence, it is difficult to quantify the effect of deforestation on parameters of catchment-scale hydrological models. This in turn leads to substantial uncertainties in predictions of the hydrological response after deforestation but also to a poor understanding of how deforestation affects principal descriptors of catchment-scale transport, such as travel time distributions and young water fractions. The objectives of this study in the Wüstebach experimental catchment are therefore to provide a mechanistic explanation of why changes in the partitioning of water fluxes can be observed after deforestation and how this further affects the storage and release dynamics of water. More specifically, we test the hypotheses that (1) post-deforestation changes in water storage dynamics and partitioning of water fluxes are largely a direct consequence of a reduction of the catchment-scale effective vegetation-accessible water storage capacity in the unsaturated root zone (SU, max) after deforestation and that (2) the deforestation-induced reduction of SU, max affects the shape of travel time distributions and results in shifts towards higher fractions of young water in the stream. Simultaneously modelling streamflow and stable water isotope dynamics using meaningfully adjusted model parameters both for the pre- and post-deforestation periods, respectively, a hydrological model with an integrated tracer routine based on the concept of storage-age selection functions is used to track fluxes through the system and to estimate the effects of deforestation on catchment travel time distributions and young water fractions Fyw. It was found that deforestation led to a significant increase in streamflow accompanied by corresponding reductions of evaporative fluxes. This is reflected by an increase in the runoff ratio from CR=0.55 to 0.68 in the post-deforestation period despite similar climatic conditions. This reduction of evaporative fluxes could be linked to a reduction of the catchment-scale water storage volume in the unsaturated soil (SU, max) that is within the reach of active roots and thus accessible for vegetation transpiration from ∼258 mm in the pre-deforestation period to ∼101 mm in the post-deforestation period. The hydrological model, reflecting the changes in the parameter SU, max, indicated that in the post-deforestation period stream water was characterized by slightly yet statistically not significantly higher mean fractions of young water (Fyw∼0.13) than in the pre-deforestation period (Fyw∼0.12). In spite of these limited effects on the overall Fyw, changes were found for wet periods, during which post-deforestation fractions of young water increased to values Fyw∼0.37 for individual storms. Deforestation also caused a significantly increased sensitivity of young water fractions to discharge under wet conditions from dFyw/dQ=0.25 to 0.36. Overall, this study provides quantitative evidence that deforestation resulted in changes in vegetation-accessible storage volumes SU, max and that these changes are not only responsible for changes in the partitioning between drainage and evaporation and thus the fundamental hydrological response characteristics of the Wüstebach catchment, but also for changes in catchment-scale tracer circulation dynamics. In particular for wet conditions, deforestation caused higher proportions of younger water to reach the stream, implying faster routing of stable isotopes and plausibly also solutes through the sub-surface.
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3

Heistermann, Maik, Heye Bogena, Till Francke, et al. "Soil moisture observation in a forested headwater catchment: combining a dense cosmic-ray neutron sensor network with roving and hydrogravimetry at the TERENO site Wüstebach." Earth System Science Data 14, no. 5 (2022): 2501–19. http://dx.doi.org/10.5194/essd-14-2501-2022.

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Abstract. Cosmic-ray neutron sensing (CRNS) has become an effective method to measure soil moisture at a horizontal scale of hundreds of metres and a depth of decimetres. Recent studies proposed operating CRNS in a network with overlapping footprints in order to cover root-zone water dynamics at the small catchment scale and, at the same time, to represent spatial heterogeneity. In a joint field campaign from September to November 2020 (JFC-2020), five German research institutions deployed 15 CRNS sensors in the 0.4 km2 Wüstebach catchment (Eifel mountains, Germany). The catchment is dominantly forested (but includes a substantial fraction of open vegetation) and features a topographically distinct catchment boundary. In addition to the dense CRNS coverage, the campaign featured a unique combination of additional instruments and techniques: hydro-gravimetry (to detect water storage dynamics also below the root zone); ground-based and, for the first time, airborne CRNS roving; an extensive wireless soil sensor network, supplemented by manual measurements; and six weighable lysimeters. Together with comprehensive data from the long-term local research infrastructure, the published data set (available at https://doi.org/10.23728/b2share.756ca0485800474e9dc7f5949c63b872; Heistermann et al., 2022) will be a valuable asset in various research contexts: to advance the retrieval of landscape water storage from CRNS, wireless soil sensor networks, or hydrogravimetry; to identify scale-specific combinations of sensors and methods to represent soil moisture variability; to improve the understanding and simulation of land–atmosphere exchange as well as hydrological and hydrogeological processes at the hillslope and the catchment scale; and to support the retrieval of soil water content from airborne and spaceborne remote sensing platforms.
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4

Strebel, Lukas, Heye R. Bogena, Harry Vereecken, and Harrie-Jan Hendricks Franssen. "Coupling the Community Land Model version 5.0 to the parallel data assimilation framework PDAF: description and applications." Geoscientific Model Development 15, no. 2 (2022): 395–411. http://dx.doi.org/10.5194/gmd-15-395-2022.

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Abstract. Land surface models are important for improving our understanding of the Earth system. They are continuously improving and becoming better in representing the different land surface processes, e.g., the Community Land Model version 5 (CLM5). Similarly, observational networks and remote sensing operations are increasingly providing more data, e.g., from new satellite products and new in situ measurement sites, with increasingly higher quality for a range of important variables of the Earth system. For the optimal combination of land surface models and observation data, data assimilation techniques have been developed in recent decades that incorporate observations to update modeled states and parameters. The Parallel Data Assimilation Framework (PDAF) is a software environment that enables ensemble data assimilation and simplifies the implementation of data assimilation systems in numerical models. In this study, we present the development of the new interface between PDAF and CLM5. This newly implemented coupling integrates the PDAF functionality into CLM5 by modifying the CLM5 ensemble mode to keep changes to the pre-existing parallel communication infrastructure to a minimum. Soil water content observations from an extensive in situ measurement network in the Wüstebach catchment in Germany are used to illustrate the application of the coupled CLM5-PDAF system. The results show overall reductions in root mean square error of soil water content from 7 % up to 35 % compared to simulations without data assimilation. We expect the coupled CLM5-PDAF system to provide a basis for improved regional to global land surface modeling by enabling the assimilation of globally available observational data.
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5

Katsanou, Konstantina, Alessandro Cattapan, Raymond Venneker, Roland Bol, and Jochen Wenninger. "Can high-resolution monitoring provide a better understanding of the hyporheic zone in Groundwater Dependent Ecosystems?" ARPHA Conference Abstracts 8 (May 28, 2025): e155243. https://doi.org/10.3897/aca.8.e155243.

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The hyporheic zone is an essential component of river ecosystems, yet it is often overlooked in environmental studies. A comprehensive understanding of the interactions between surface water (SW) and groundwater (GW), as well as the role of Groundwater Dependent Ecosystems (GDEs) in providing essential ecosystem services, is crucial for informed and effective land and water management (Yang and 2017).GDEs are influenced by local hydrogeology and climate, necessitating detailed spatial and temporal monitoring of the physical and chemical interactions occurring within these systems. Traditional monitoring methods, which typically rely on individual sensors to collect point data, can overlook important variations across different sections of a stream. By integrating continuous high-resolution longitudinal stream temperature monitoring with Electrical Conductivity (EC) and discharge measurements, more comprehensive data can be collected. This approach provides both high spatial and temporal resolution, capturing small-scale interactions and patterns that are crucial for understanding the SW-GW interface. Such methods are particularly valuable for localising SW-GW interactions and assessing their seasonal impact on GDEs' baseflow.To investigate these interactions, we employed a multidisciplinary approach combined with continuous high-resolution longitudinal stream temperature monitoring in the headwater stream of the Wüstebach Catchment, located within the TERENO Observatory in Eifel National Park, Germany. In October 2022, a Fibre Optic Distributed Temperature Sensing (FO-DTS) system (Silixa XT) was installed along a 500-meter-long stream section to monitor temperature changes over a hydrological year. Stream temperature measurements were recorded every 15 minutes at a resolution of 25 cm. Sampling was conducted at 18 sites distributed along the stream, tributaries, and existing groundwater wells, in conjunction with weekly sampling coordinated by site managers. Additionally, two intensive field campaigns were carried out during the wet and dry seasons, incorporating high-frequency EC measurements and tracer tests to capture specific hydrological events such as snowmelt and intense rainfall. These efforts aimed to deepen the understanding of groundwater recharge and discharge processes. Additional discharge and precipitation data were obtained from the TERENO Eifel database.Despite the limited groundwater network at the study site, this approach significantly enhanced our understanding of SW-GW interactions and their role in driving the seasonal flow variations of GDEs. It also led to the quantification of SW-GW interactions and the development of standardised methods that can be applied and scaled to larger areas, complementing and strengthening existing monitoring efforts.
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6

Robinson, Kerri-Leigh, Heye R. Bogena, Qiqi Wang, Erik Cammeraat, and Roland Bol. "Effects of deforestation on dissolved organic carbon and nitrate in catchment stream water revealed by wavelet analysis." Frontiers in Water 4 (November 10, 2022). http://dx.doi.org/10.3389/frwa.2022.1003693.

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Deforestation can lead to an increase in the availability of nutrients in the soil and, in turn, have an impact on the quality of water in receiving water bodies. This study assesses the impact of deforestation by evaluating the in-stream concentrations of dissolved organic carbon (DOC) and nitrate, their internal relationship, and those with stream discharge in the Wüstebach headwater catchment (Germany). This catchment has monitored stream water and associated environmental parameters for over a decade as part of the TERENO initiative. Additionally, there is a paired undisturbed forested catchment that serves as a reference stream. Our approach included a more advanced correlation analysis, namely wavelet analysis, that assists in determining changes in the correlation and lag time between the variables of interest over different time scales. This study found that after deforestation, there was an immediate increase in in-stream DOC concentrations, followed by an increase in nitrate ~1 year later. Overall, the mean DOC concentration increased, and mean nitrate concentration decreased across the catchment post-deforestation. Elevated stream water nutrient levels peaked around 2 to 3 years after the clear-cutting, and returned to pre-deforestation levels after ~5 years. The deforestation had no influence on the anti-correlation between DOC and nitrate. However, the correlation between both compounds and discharge was likely altered due to the increased soil nutrients availability as a result of deforestation. Wavelet coherence analysis revealed the “underlying” changing strengths and directions of the main correlations between DOC, nitrate and discharge on different time scales resulting from severe forest management interventions (here deforestation). This information provides new valuable impact insights for decision making into such forest management interventions.
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7

Wang, Qiqi, Yuquan Qu, Kerri-Leigh Robinson, et al. "Deforestation alters dissolved organic carbon and sulfate dynamics in a mountainous headwater catchment—A wavelet analysis." Frontiers in Forests and Global Change 5 (November 7, 2022). http://dx.doi.org/10.3389/ffgc.2022.1044447.

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Deforestation has a wide range of effects on hydrological and geochemical processes. Dissolved organic carbon (DOC) dynamics, a sensitive environmental change indicator, is expected to be affected by deforestation, with changes in atmospheric sulfur (S) deposition compounding this. However, how precisely anthropogenic disturbance (deforestation) under a declining atmospheric S input scenario affects the underlying spatiotemporal dynamics and relationships of river DOC and sulfate with hydro-climatological variables e.g., stream water temperature, runoff, pH, total dissolved iron (Fetot), and calcium (Ca2+) remains unclear. We, therefore, examined this issue within the TERENO Wüstebach catchment (Eifel, Germany), where partial deforestation had taken place in 2013. Wavelet transform coherence (WTC) analysis was applied based on a 10-year time series (2010–2020) from three sampling stations, whose (sub) catchment areas have different proportions of deforested area (W10: 31%, W14: 25%, W17: 3%). We found that water temperature and DOC, sulfate, and Fetot concentrations showed distinct seasonal patterns, with DOC averaging concentrations ranging from 2.23 (W17) to 4.56 (W10) mg L–1 and sulfate concentration ranging from 8.04 (W10) to 10.58 (W17) mg L–1. After clear-cut, DOC significantly increased by 59, 58% in the mainstream (W10, W14), but only 26% in the reference stream. WTC results indicated that DOC was negatively correlated with runoff and sulfate, but positively correlated with temperature, Ca2+, and Fetot. The negative correlation between DOC with runoff and sulfate was apparent over the whole examined 10-year period in W17 but did end in W10 and W14 after the deforestation. Sulfate (SO4) was highly correlated with stream water temperature, runoff, and Fetot in W10 and W14 and with a longer lag time than W17. Additionally, pH was stronger correlated (higher R2) with sulfate and DOC in W17 than in W10 and W14. In conclusion, WTC analysis indicates that within this low mountainous forest catchment deforestation levels over 25% (W10 and W14) affected the coupling of S and C cycling substantially more strongly than “natural” environmental changes as observed in W17.
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8

Bogena, Heye R., Michael P. Stockinger, and Andreas Lücke. "Long‐term stable water isotope and runoff data for the investigation of deforestation effects on the hydrological system of the Wüstebach catchment, Germany." Hydrological Processes, December 18, 2020. http://dx.doi.org/10.1002/hyp.14006.

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9

Katsanou, Konstantina, Alessandro Cattapan, Raymond Venneker, Roland Bol, and Jochen Wenninger. "Can high-resolution monitoring provide a better understanding of the hyporheic zone in Groundwater Dependent Ecosystems?" ARPHA Conference Abstracts 8 (May 28, 2025). https://doi.org/10.3897/aca.8.e155243.

Full text
Abstract:
The hyporheic zone is an essential component of river ecosystems, yet it is often overlooked in environmental studies. A comprehensive understanding of the interactions between surface water (SW) and groundwater (GW), as well as the role of Groundwater Dependent Ecosystems (GDEs) in providing essential ecosystem services, is crucial for informed and effective land and water management (Yang and 2017). GDEs are influenced by local hydrogeology and climate, necessitating detailed spatial and temporal monitoring of the physical and chemical interactions occurring within these systems. Traditional monitoring methods, which typically rely on individual sensors to collect point data, can overlook important variations across different sections of a stream. By integrating continuous high-resolution longitudinal stream temperature monitoring with Electrical Conductivity (EC) and discharge measurements, more comprehensive data can be collected. This approach provides both high spatial and temporal resolution, capturing small-scale interactions and patterns that are crucial for understanding the SW-GW interface. Such methods are particularly valuable for localising SW-GW interactions and assessing their seasonal impact on GDEs' baseflow. To investigate these interactions, we employed a multidisciplinary approach combined with continuous high-resolution longitudinal stream temperature monitoring in the headwater stream of the Wüstebach Catchment, located within the TERENO Observatory in Eifel National Park, Germany. In October 2022, a Fibre Optic Distributed Temperature Sensing (FO-DTS) system (Silixa XT) was installed along a 500-meter-long stream section to monitor temperature changes over a hydrological year. Stream temperature measurements were recorded every 15 minutes at a resolution of 25 cm. Sampling was conducted at 18 sites distributed along the stream, tributaries, and existing groundwater wells, in conjunction with weekly sampling coordinated by site managers. Additionally, two intensive field campaigns were carried out during the wet and dry seasons, incorporating high-frequency EC measurements and tracer tests to capture specific hydrological events such as snowmelt and intense rainfall. These efforts aimed to deepen the understanding of groundwater recharge and discharge processes. Additional discharge and precipitation data were obtained from the TERENO Eifel database. Despite the limited groundwater network at the study site, this approach significantly enhanced our understanding of SW-GW interactions and their role in driving the seasonal flow variations of GDEs. It also led to the quantification of SW-GW interactions and the development of standardised methods that can be applied and scaled to larger areas, complementing and strengthening existing monitoring efforts.
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