Article
Geosciences, Multidisciplinary
Robin K. Weatherl, Maria J. Henao Salgado, Maximilian Ramgraber, Christian Moeck, Mario Schirmer
Summary: This study explores the relationship between surface runoff and groundwater recharge in urban areas using a top-down water balance approach, and two empirical models were used to estimate runoff. The differences between the resulting runoff estimates highlight the complexity of the rainfall-runoff relationship, emphasizing the importance of understanding soil-moisture dynamics and their control on hydro(geo)logical responses. The estimated groundwater recharge is found to be approximately 40-45% of annual precipitation, similar to results from Swiss catchments of similar characteristics.
HYDROGEOLOGY JOURNAL
(2021)
Article
Environmental Sciences
Ryan T. Bailey, Katrin Bieger, Luke Flores, Mark Tomer
Summary: This study presents a modified version of the SWAT+ watershed model to quantify the impact of surface and subsurface parameters on watershed drainage outflow. Results indicate that surface runoff and soil percolation parameters have the strongest effect on watershed-wide subsurface drainage, emphasizing a holistic watershed approach to manage subsurface drainage.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Computer Science, Interdisciplinary Applications
Qin Zhang, Liping Zhang, Dunxian She, Shuxia Wang, Gangsheng Wang, Sidong Zeng
Summary: The study utilized an automatic model and analysis method to accurately determine key flood characteristics and developed a corresponding toolbox. The results show that this method can effectively be applied to watersheds with diverse characteristics.
ENVIRONMENTAL MODELLING & SOFTWARE
(2021)
Article
Engineering, Civil
Xiaoming Guo, Lukai Xu, Lei Su, Yu Deng, Chaohui Yang
Summary: This study identified limitations of eco-flows based on FDCs and redefined ES and ED using DH, finding that DHs performed better in assessing eco-flows. The results demonstrated that the new method using DHs can provide a more accurate assessment of river health.
WATER RESOURCES MANAGEMENT
(2021)
Article
Environmental Sciences
Elena Cerino Abdin, Glenda Taddia, Martina Gizzi, Stefano Lo Russo
Summary: Mountain springs in Italy are crucial sources of potable water, and optimizing management strategies for mountain groundwater resources is becoming increasingly important. The accuracy and frequency of flow rate measurements impact the ability to study spring hydrograph and recession curve analysis. The research found that longer acquisition intervals resulted in increased percentage errors, with 1-day and 3-day sampling intervals providing valid estimates for mountain aquifer hydrodynamic parameters.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Water Resources
Michael Gieschen, Peter Nelson
Summary: Stream channel incision and deposition after wildfire can impact runoff mechanisms and water composition. This study found that seasonality and postfire stream channel erosion influence the makeup of runoff response.
HYDROLOGICAL PROCESSES
(2023)
Article
Water Resources
Mark R. R. Williams, Chad J. J. Penn, Kevin W. W. King, Scott J. J. McAfee
Summary: In this study, the researchers used artificial macropores combined with monitoring to evaluate the connection between surface soils and tile drains as well as the transport of phosphorus. They found that the connectivity between surface and tile drains is important for water and nutrient transport under both dry and wet conditions. Increasing wetness led to greater mobilization of pre-event water and higher discharge, which affected the transport of dissolved phosphorus.
HYDROLOGICAL PROCESSES
(2023)
Article
Engineering, Civil
Mark R. Williams, Scott J. McAfee
Summary: This research focused on quantifying hydrological processes in a drained landscape in Indiana, USA, using hydrometric data and stable isotope signatures. The study found that near-surface soil water reflected seasonal precipitation variations, while groundwater was recharged during winter. Groundwater was identified as the primary source of water to the tile drain, with hydrograph response controlled by antecedent wetness. Comparing tile drain celerities across environmental conditions revealed varying mechanisms controlling hydrograph response.
JOURNAL OF HYDROLOGY
(2021)
Article
Water Resources
Leo M. Peskett, Kate Heal, Alan M. MacDonald, Andrew R. Black, Jeffrey J. McDonnell
Summary: The study investigates the influence of plantation forestry on storm rainfall runoff in UK catchments. While plantation forest cover may affect storm rainfall runoff fractions, it is not a dominant control in temperate upland UK catchments. Soils and geology are found to have a greater influence on storm rainfall runoff fraction, emphasizing the importance of considering these factors in natural flood management planning.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2021)
Article
Engineering, Civil
Nicolas Surdyk, Alexis Gutierrez, Nicole Baran, Dominique Thiery
Summary: Groundwater nitrate contamination requires measures to reduce agricultural impacts. Models, especially lumped models like BICHE, can be useful for understanding nitrate transfer trends and forecasting, showing good performance in long-term trend analysis.
JOURNAL OF HYDROLOGY
(2021)
Article
Geosciences, Multidisciplinary
Erfan Bahrami, Meysam Salarijazi, Omolbani Mohammadrezapour, Parviz Haghighat Jou
Summary: Several studies have evaluated the efficiency of the soil conservation service (SCS) model in estimating flood characteristics, with varying results. This study investigated the impacts of different base flow separation methods and excess rainfall estimation methods on the accuracy of the SCS model in the Jong catchment in Iran. The results showed that the variable gradient method performed the best in estimating flood characteristics, while the SCS method improved the estimation of the hydrograph shape and flood volume.
JOURNAL OF EARTH SYSTEM SCIENCE
(2022)
Article
Water Resources
Chris Leong, Yoshiyuki Yokoo
Summary: This study proposes a novel approach to transform the representation of the subsurface component in hydrological models, improving the applicability of flow duration curve (FDC) studies at large spatial scales. The research finds that wet catchments have more complex model structures than dry catchments, and the interference strength in intermediate reservoirs impacts the shape of FDCs, increasing with aridity. The study also presents a conceptual framework for flexible model structures based on the shapes of FDCs.
HYDROLOGICAL PROCESSES
(2022)
Article
Water Resources
Ze Tao, Min Li, Bingcheng Si, Dyan Pratt
Summary: The study shows that rainfall intensity affects runoff responses in a semi-arid catchment, and the stored water in the thick, loess covered areas was less connected with stream runoff. Solute transport may threaten water quality in the area, requiring further analysis of the performance of the eco-restoration project.
HYDROLOGICAL PROCESSES
(2021)
Article
Environmental Sciences
Hao Wu, Min Xu, Mengyan Zhu
Summary: This study analyzed recent changes in the hydrological components of the Lena River Basin (LRB) in Siberia and Mackenzie River Basin (MRB) in North America from 2003 to 2016. The results showed a decrease in annual precipitation and terrestrial water storage, while evapotranspiration increased in both basins. Contradictory trends in runoffs were observed, with an increase in LRB and a decrease in MRB, reflecting the impacts of global warming in Arctic river basins.
Article
Ecology
Bogna J. Smug, Monika Opalek, Maks Necki, Dominika Wloch-Salamon
Summary: This article emphasizes the importance of using the duration of the lag phase as a marker of organismal fitness and introduces tools and methods for calculating lag duration. The authors developed a shiny-based web application and an R package called 'miLAG', and propose a decision tree for choosing the most suitable method. The article also provides examples of how to calculate lag duration using their Shiny server.
METHODS IN ECOLOGY AND EVOLUTION
(2023)
Article
Environmental Sciences
Florian U. Jehn, Marie Schneider, Jason R. Wang, Luke Kemp, Lutz Breuer
Summary: The study reveals a significant mismatch between the research coverage of likely warming rates, with 1.5 degrees C and 2 degrees C scenarios being overrepresented, while higher end warming scenarios of 3 degrees C and above, despite potential catastrophic impacts, are severely neglected. It calls for more attention to be paid to these neglected scenarios.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Environmental Sciences
Laura Klement, Martin Bach, Markus Geupel, Lutz Breuer
Summary: Reactive nitrogen released into the environment has negative implications for various aspects, and a nitrogen footprint can help assess the impact of personal choices. The N-Calculator tool, originally based on US data, requires revision when applied to other countries due to differences in food sector conditions. A revised N-Calculator for Germany, based on German food production data, showed varying nitrogen losses for different products, with animal-based products leading to higher losses. Validation of the results at the national level showed good agreement with statistical data on nitrogen flows in Germany.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Environmental Sciences
Carlos Iniguez-Armijos, Maria Fernanda Tapia-Armijos, Frank Wilhelm, Lutz Breuer
Summary: The study highlights the lack of understanding of multiple stressors on urbanized Andean streams, where urbanization mostly impacts stream ecosystems through water-chemistry and physical-habitat stressors, with ecosystem functioning being more affected than structural attributes. It suggests that managers should focus on reducing important stressors rather than investigating complex stressor interactions, and that stream biomonitoring programs would benefit from a combination of structural and functional indicators in assessing anthropogenic effects.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Water Resources
Amit Kumar, Simon N. Gosling, Matthew F. Johnson, Matthew D. Jones, Jamal Zaherpour, Rohini Kumar, Guoyong Leng, Hannes Muller Schmied, Jenny Kupzig, Lutz Breuer, Naota Hanasaki, Qiuhong Tang, Sebastian Ostberg, Tobias Stacke, Yadu Pokhrel, Yoshihide Wada, Yoshimitsu Masaki
Summary: This study evaluated the simulations of hydrological droughts from nine catchment scale hydrological models (CHMs) and eight global scale hydrological models (GHMs) for eight large catchments. The results showed that the CHMs performed relatively better than the GHMs in simulating monthly runoff-deficits, but all the models had limited abilities to accurately simulate drought events.
ADVANCES IN WATER RESOURCES
(2022)
Correction
Multidisciplinary Sciences
Florian U. Jehn, Alejandro Chamorro, Tobias Houska, Lutz Breuer
SCIENTIFIC REPORTS
(2022)
Article
Environmental Sciences
Florian U. Jehn, Luke Kemp, Ekaterina Ilin, Christoph Funk, Jason R. Wang, Lutz Breuer
Summary: This article focuses on the shifting emphasis on different global temperature increases in IPCC reports over time. The recent fifth and sixth assessment reports have shown a significantly stronger focus on warming below 2 degrees C, which is concerning as warming above 2 degrees C is more likely and has a greater impact on climate risk assessments.
Article
Environmental Sciences
Paul L. Ohlert, Martin Bach, Lutz Breuer
Summary: This study evaluates the accuracy of inverse distance weighting (IDW) in designating nitrate vulnerable zones. Using a dataset of 5790 groundwater monitoring sites in Bavaria, the results show that IDW interpolation method has significant errors in determining areas with groundwater nitrate concentration above the threshold. The average absolute error of nitrate concentration is 7.0 mg NO3/l, and the number of measurement sites above 50 mg NO3/l is underestimated. These underestimations persist even when the interpolation is done separately for hydrogeological regions. Therefore, IDW method is not reliable for the designation of nitrate vulnerable zones.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
E. G. Wangari, R. M. Mwanake, D. Kraus, C. Werner, G. M. Gettel, R. Kiese, L. Breuer, K. Butterbach-Bahl, T. Houska
Summary: The study quantified the landscape soil greenhouse gas exchange within 6 km² in central Germany using fast-box chamber technique. Results showed that seasonality and land use had significant impacts on fluxes, while soil type and slope had minor effects. Additionally, more chamber measurement locations are needed to assess landscape-scale N2O fluxes compared to CO2 and CH4.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2022)
Article
Mathematics
Zadoki Tabo, Chester Kalinda, Lutz Breuer, Christian Albrecht
Summary: Schistosomiasis is a deadly neglected tropical disease. A mathematical model is proposed to evaluate the impact of four strategies to control its spread. The results show that combining chemotherapy, awareness programs, snail and molluscicide removal, and considering temperature changes can effectively eradicate the disease. However, adapting strategies based on weather patterns and seasonal climates is necessary for successful control.
Article
Ecology
Ricky Mwangada Mwanake, Gretchen Maria Gettel, Elizabeth Gachibu Wangari, Clarissa Glaser, Tobias Houska, Lutz Breuer, Klaus Butterbach-Bahl, Ralf Kiese
Summary: Anthropogenic activities significantly increase GHG emissions in inland waters, with land use being more influential than seasonality. Agriculture-dominated catchments and streams with wastewater inflows have much higher and more variable emissions of CO2, CH4, and N2O compared to forested streams. Nutrient, labile carbon, and dissolved GHG inputs from agricultural and settlement areas contribute to these hotspots and hot-moments of fluvial GHG emissions. The annual emissions from anthropogenic-influenced streams are up to 20 times higher than natural streams, primarily driven by CO2.
Article
Water Resources
Kristian Foerster, Daniel Westerholt, Philipp Kraft, Gilbert Loesken
Summary: Green roofs are proven to increase evapotranspiration and reduce runoff, helping to minimize urban flooding. Recent research considers varying flow length and slope for the first time, demonstrating that maximizing flow length and minimizing slope can significantly decrease runoff coefficient. The study combines experimental data and numerical modeling to provide new insights into green roof design with practical relevance and reproducibility.
FRONTIERS IN WATER
(2021)
Article
Computer Science, Artificial Intelligence
Michael C. Thrun, Alfred Ultsch, Lutz Breuer
Summary: An explainable AI framework is proposed for multivariate time series data, aimed at helping domain experts understand the relationships between water quality and environmental parameters. The framework uses a data-driven choice of distance measure and combines supervised decision trees guided by projection-based clustering to achieve interpretability.
MACHINE LEARNING AND KNOWLEDGE EXTRACTION
(2021)
Article
Water Resources
Florian U. Jehn, Lutz Breuer, Philipp Kraft, Konrad Bestian, Tobias Houska
Summary: Hydrological theory often assumes an exponential relationship between storage and discharge. However, in reality, only a fraction of catchments exhibit this behavior, with most catchments showing complex and irregular patterns in their storage-discharge relationship.
FRONTIERS IN WATER
(2021)
Article
Water Resources
Naomi Njue, Jan Graf, Bjorn Weeser, Mariana C. Rufino, Lutz Breuer, Suzanne R. Jacobs
Summary: This study evaluates the potential of using a citizen science approach to explore spatiotemporal turbidity and suspended sediment dynamics in the Sondu-Miriu river basin, western Kenya. The comparison between citizen-scientist collected data and measurements from automated stations showed high correlation, indicating that citizen scientists can provide comparable data. However, the precision of measurements of suspended sediment concentrations varied due to detection limitations and capturing events, with forest cover being identified as a key factor in controlling suspended sediment concentrations in the region. Future citizen science projects should focus on motivation strategies and application of robust methods for improved hydrological monitoring.
FRONTIERS IN WATER
(2021)
Article
Water Resources
Amir Sahraei, Alejandro Chamorro, Philipp Kraft, Lutz Breuer
Summary: The study investigated the potential of using precipitation, soil moisture, and air temperature as input features to predict maximum event water fractions, and found that both Artificial Neural Network (ANN) and Support Vector Machine (SVM) algorithms show promise in the field of hydrology. SVM outperformed ANN in predicting maximum event water fractions, capturing the dynamics of their changes more effectively.
FRONTIERS IN WATER
(2021)