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
Environmental Sciences
Andrea L. Popp, Alvaro Pardo-Alvarez, Oliver S. Schilling, Andreas Scheidegger, Stephanie Musy, Morgan Peel, Philip Brunner, Roland Purtschert, Daniel Hunkeler, Rolf Kipfer
Summary: This study introduces a new approach to understand the relationship between groundwater mixing ratios and travel times using in-situ noble gas analyses. The results from a groundwater pumping test conducted in Switzerland demonstrate the importance of interpreting age dating tracers and the influence of different water sources on estimated travel times.
WATER RESOURCES RESEARCH
(2021)
Article
Environmental Sciences
Xu Cao, Wei He, Mengqing Fan, Wei He, Yuanyuan Shi, Tongyan An, Xiaorui Chen, Zhanhao Zhang, Fei Liu, Yi Zhao, Pengpeng Zhou, Cuibai Chen, Jiangtao He
Summary: This study evaluated the impact of anthropogenic groundwater recharge (AGR) on the composition and sources of dissolved organic matter (DOM) in groundwater. It found that the fluorescent indices C1%, C2%, and C3% were more sensitive to AGR, indicating significant differences between artificially recharged groundwater and naturally recharged groundwater. The study also identified the optimal dual index BIX-C1% for end-member mixing analysis (EMMA) of groundwater DOM. The results showed that AGR significantly changed the native DOM in groundwater and that surface water contributed more DOM to AGR groundwater compared to natural groundwater recharge. This study provides important insights into the quantitative source apportionment of DOM in groundwater under long-term AGR.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Civil
Peijun Shi, Yanan Huang, Congying Yang, Zhi Li
Summary: This study utilized multiple tracers and methods to investigate the groundwater recharge mechanism in thick loess deposits, revealing that local precipitation primarily recharges groundwater through matrix flow and the impact of vegetation types and land use on deep drainage.
JOURNAL OF HYDROLOGY
(2021)
Article
Water Resources
Xiong Xiao, Xinping Zhang, Xiaonan Shi, Zhengliang Yu, Keshao Liu, Zhu Liu
Summary: Pressure on river water resources may increase due to global climate change and human activity. This study examined the river water sources in the Xiangjiang River basin using hydrochemical tracers and end-member mixing analysis. The results showed that the contributions from precipitation, near-surface runoff, and groundwater varied greatly within the year, possibly due to seasonal factors.
HYDROLOGICAL PROCESSES
(2023)
Article
Environmental Sciences
Surbhi Tak, So-Jeong Han, Yun-Kyung Lee, Jinwoo Cho, Jin Hur
Summary: This study aimed to explore the feasibility of using end member mixing analysis (EMMA) to predict the environmental reactivity of dissolved organic matter (DOM) by testing two DOM sources (soil and algae) at varying mixing ratios. The results showed that all tested DOM reactivities followed ideal mixing behavior with linear relationships between source mixing ratios and tested reactivity with R2 value of >0.80. The ideal mixing behavior of DOM functions was more pronounced than that based on spectroscopic indicators derived from UV absorption and fluorescence spectroscopy.
ENVIRONMENTAL POLLUTION
(2021)
Article
Engineering, Civil
Mahmood Sadat-Noori, Christian Anibas, Martin S. Andersen, William Glamore
Summary: Subsurface flow is crucial for wetland functioning and ecosystem services, with various methods such as radon, heat, and Darcy's equation used to quantify flow rates. While radon provides total subsurface flow, other methods like head gradient and heat tracer may underestimate flow in dynamic coastal systems like tidal wetlands. Employing a multi-tracer approach is important for accurately quantifying hydrological export of dissolved constituents in coastal wetlands.
JOURNAL OF HYDROLOGY
(2021)
Article
Environmental Sciences
Rongrong Xie, Ling Zhen, Xianzhong Wu, Jiabing Li
Summary: Identifying the mixing processes of waters and currents in tidal reach is essential for environmental management in protecting freshwater resources and preventing water pollution. This study conducted three field investigations using isotopes and salinity to differentiate water flows in a typical tidal reach. Results showed that delta D and delta 18O values decreased from August to November and significantly increased in April. The saltwater zone had higher values due to stronger evaporation. Based on the model, freshwater, transition zone, and saltwater had average contributions of 51.50%, 36.93%, and 11.57% respectively. Our research provides important insights for understanding isotopes in estuarine regions and their applications in environmental management.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Civil
Kang Peng, James W. Heiss, Xianjun Xie, Lu Yan, Yamin Deng, Yiqun Gan, Qinghua Li, Yanpeng Zhang
Summary: Material transport and transformations in mangrove wetlands are influenced by seawater-groundwater mixing processes, which are crucial for mangrove growth and development. Understanding groundwater and salt transport dynamics in the aquifers beneath mangrove wetlands is important for estimating chemical fluxes accurately to these ecosystems.
JOURNAL OF HYDROLOGY
(2023)
Article
Engineering, Environmental
Siqi Zhang, Yongguang Yin, Peijie Yang, Cong Yao, Shanyi Tian, Pei Lei, Tao Jiang, Dingyong Wang
Summary: This study investigated the impact of changes in DOM characteristics driven by end-member mixing on DOM biogeochemical reactivities. The results showed that the variations of DOM characteristics significantly affected its biogeochemical reactivities, but not all parameters and reactivities followed the conservative mixing behavior. Therefore, the effect of end-member mixing should be evaluated in the given reactivity instead of generalization.
Article
Geosciences, Multidisciplinary
Nikolai Fahrmeier, Simon Frank, Nadine Goeppert, Nico Goldscheider
Summary: Water suppliers in southern Germany face challenges from climate change and population growth. In this study, a combination of different tracing techniques was used to characterize the aquifer system and understand groundwater flow towards the extraction wells. The results showed heterogeneity caused by the geological setting at both small and large scales.
HYDROGEOLOGY JOURNAL
(2022)
Article
Environmental Sciences
Andrey Bugaets, Boris Gartsman, Tatiana Gubareva, Sergei Lupakov, Andrey Kalugin, Vladimir Shamov, Leonid Gonchukov
Summary: This study compares the simulated streamflow composition of three well-known rainfall-runoff models (ECOMAG, HBV, SWAT) with the hydrograph decomposition evaluated using End-Member Mixing Analysis (EMMA). The study finds significant differences in the runoff sources dynamics between two neighboring catchments. ECOMAG is the most conformable to the EMMA outcome, HBV reflects flood events well, and SWAT exhibits distinctive behavior compared to other models. The results show that, in addition to the standard efficiency criteria of simulated and observed runoff proximity, EMMA analysis can provide useful auxiliary information for the validation of modeling results.
Article
Environmental Sciences
Dale R. Van Stempvoort, William D. Robertson, Ross MacKay, Pamela Collins, Susan J. Brown, Serban Danielescu, Timothy Pascoe
Summary: This study addresses the role of groundwater in the nutrient balance for a restricted bay of a Precambrian Shield lake. The findings indicate seepage of septic plumes to the bay, but significant attenuation of septic-derived nutrients in the subsurface.
JOURNAL OF GREAT LAKES RESEARCH
(2021)
Article
Environmental Sciences
Katherine Y. Santizo, Mark A. Widdowson, Erich T. Hester
Summary: This study used numerical simulation to investigate the dynamic changes of mixing-dependent reaction zones under different hydraulic and chemical conditions. The results showed that the location and thickness of mixing zones and reactant production zones were most sensitive to changes in hydraulic inflow from groundwater and surface water. Additionally, simpler field metrics such as thickness may be used as surrogates for more challenging measurements in monitoring natural attenuation.
JOURNAL OF CONTAMINANT HYDROLOGY
(2022)
Article
Geochemistry & Geophysics
Ellen Lalk, Jeffrey S. Seewald, L. Taras Bryndzia, Shuhei Ono
Summary: By analyzing methane stored in sediments, we can identify its source and evaluate the potential of natural gas reservoirs and subsurface microbial activity. However, the burial and transport of methane can complicate this assessment. In this study, the re-equilibration of methane isotopes along geothermal gradients suggests that the upper temperature limit of microbial methanogenesis in marine sediments may be higher than expected.
ORGANIC GEOCHEMISTRY
(2023)
Article
Environmental Sciences
Christian Moeck, Dirk Radny, Andrea Popp, Matthias Brennwald, Sebastian Stoll, Adrian Auckenthaler, Michael Berg, Mario Schirmer
SCIENCE OF THE TOTAL ENVIRONMENT
(2017)
Article
Engineering, Civil
Tom Gleeson, Andrew H. Manning, Andrea Popp, Matthew Zane, Jordan F. Clark
JOURNAL OF HYDROLOGY
(2018)
Article
Astronomy & Astrophysics
Andrea L. Popp, Stefanie R. Lutz, Sina Khatamis, Tim H. M. van Emmerik, Wouter J. M. Knoben
EARTH AND SPACE SCIENCE
(2019)
Article
Environmental Sciences
Joerg Lewandowski, Shai Arnon, Eddie Banks, Okke Batelaan, Andrea Betterle, Tabea Broecker, Claudia Coll, Jennifer D. Drummond, Jaime Gaona Garcia, Jason Galloway, Jesus Gomez-Velez, Robert C. Grabowski, Skuyler P. Herzog, Reinhard Hinkelmann, Anja Hoehne, Juliane Hollender, Marcus A. Horn, Anna Jaeger, Stefan Krause, Adrian Lochner Prats, Chiara Magliozzi, Karin Meinikmann, Brian Babak Mojarrad, Birgit Maria Mueller, Ignacio Peralta-Maraver, Andrea L. Popp, Malte Posselt, Anke Putschew, Michael Radke, Muhammad Raza, Joakim Riml, Anne Robertson, Cyrus Rutere, Jonas L. Schaper, Mario Schirmer, Hanna Schulz, Margaret Shanafield, Tanu Singh, Adam S. Ward, Philipp Wolke, Anders Worman, Liwen Wu
Article
Engineering, Environmental
Andrea L. Popp, Cara C. Manning, Matthias S. Brennwald, Rolf Kipfer
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2020)
Article
Environmental Sciences
Andrea L. Popp, Alvaro Pardo-Alvarez, Oliver S. Schilling, Andreas Scheidegger, Stephanie Musy, Morgan Peel, Philip Brunner, Roland Purtschert, Daniel Hunkeler, Rolf Kipfer
Summary: This study introduces a new approach to understand the relationship between groundwater mixing ratios and travel times using in-situ noble gas analyses. The results from a groundwater pumping test conducted in Switzerland demonstrate the importance of interpreting age dating tracers and the influence of different water sources on estimated travel times.
WATER RESOURCES RESEARCH
(2021)
Editorial Material
Environmental Sciences
Andrea L. Popp, Cara C. M. Manning, Julia L. A. Knapp
Summary: The article summarizes recent advances in mobile mass spectrometry methods for measuring dissolved noble gases, as well as their applications in studying hydrological and biogeochemical processes. It points out potential future applications of these instruments to enhance efficiency and cost-effectiveness in hydrological research.
WATER RESOURCES RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Caitlyn A. Hall, Sheila M. Saia, Andrea L. Popp, Nilay Dogulu, Stanislaus J. Schymanski, Niels Drost, Tim van Emmerik, Rolf Hut
Summary: Open, accessible, reusable, and reproducible hydrologic research has significant positive impact. Challenges such as limited coding experience and fear of weaknesses being exposed hinder the adoption of open science practices in the hydrology community. To address these challenges, the Open Hydrology Principles and Open Hydrology Practical Guide are proposed to guide individual and community progress. Hydrologists are encouraged to contribute to the living document and share resources in the community-supported repository.
HYDROLOGY AND EARTH SYSTEM SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Stefanie R. Lutz, Andrea Popp, Tim van Emmerik, Tom Gleeson, Liz Kalaugher, Karsten Moebius, Tonie Mudde, Brett Walton, Rolf Hut, Hubert Savenije, Louise J. Slater, Anna Solcerova, Cathelijne R. Stoof, Matthias Zink
HYDROLOGY AND EARTH SYSTEM SCIENCES
(2018)