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Hydrology and Earth System Sciences
An interactive open-access journal of the European Geosciences Union
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Abstracted/indexedShort summary
We used the past century’s time series of observed climate, containing non-stationary signals of atmospheric oscillations, global warming, and global dimming/brightening, to quantify possible systematic errors that may be introduced in estimates of potential evaporation and in hydrological modeling studies due to straightforward application of i) the common two-step approach for potential evaporation specifically, and ii) fixed instead of time-variant model parameters in general.
We used the past century’s time series of observed climate, containing non-stationary signals...
Articles | Volume 19, issue 2
Hydrol. Earth Syst. Sci., 19, 997–1014, 2015
https://doi.org/10.5194/hess-19-997-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Hydrol. Earth Syst. Sci., 19, 997–1014, 2015
https://doi.org/10.5194/hess-19-997-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article 24 Feb 2015
Research article | 24 Feb 2015
Sensitivity of potential evaporation estimates to 100 years of climate variability
R. P. Bartholomeus et al.
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Jian Song, Yun Yang, Xiaomin Sun, Jin Lin, Ming Wu, Jianfeng Wu, and Jichun Wu
Hydrol. Earth Syst. Sci., 24, 2323–2341, https://doi.org/10.5194/hess-24-2323-2020, https://doi.org/10.5194/hess-24-2323-2020, 2020
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We proposed a novel many-objective simulation-optimization framework for conjunctive use of surface water and groundwater in Yanqi Basin, northwest China. The management model involving socioeconomic and environmental objectives was constructed to explore optimal water-use schemes. Three runoff scenarios were then specified to quantify the effect of runoff reduction related to climate change on water management. Results provide Pareto-optimal solutions for basin-scale water management.
Martin J. Wells, Troy E. Gilmore, Natalie Nelson, Aaron Mittelstet, and John Karl Böhlke
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2020-169, https://doi.org/10.5194/hess-2020-169, 2020
Revised manuscript accepted for HESS
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Groundwater in many agricultural areas contains high levels of nitrate, which is a concern for drinking water supplies. The rate at which nitrate moves through the subsurface is a critical piece of information for predicting how quickly groundwater nitrate levels may improve after agricultural producers change their approach to managing crop water and fertilizers. In this study we explored a new statistical modeling approach to determine rates at which nitrate moves into and through an aquifer.
Miao Jing, Rohini Kumar, Falk Heße, Stephan Thober, Oldrich Rakovec, Luis Samaniego, and Sabine Attinger
Hydrol. Earth Syst. Sci., 24, 1511–1526, https://doi.org/10.5194/hess-24-1511-2020, https://doi.org/10.5194/hess-24-1511-2020, 2020
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This study investigates the response of regional groundwater system to the climate change under three global warming levels (1.5, 2, and 3 °C) in a central German basin. A comprehensive uncertainty analysis is also presented. This study indicates that the variability of responses increases with the amount of global warming, which might affect the cost of managing the groundwater system.
Harald Hofmann, Dean Newborn, Ian Cartwright, Dioni I. Cendón, and Matthias Raiber
Hydrol. Earth Syst. Sci., 24, 1293–1318, https://doi.org/10.5194/hess-24-1293-2020, https://doi.org/10.5194/hess-24-1293-2020, 2020
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Fresh groundwater (GW) on barrier islands is affected by GW use and precipitation variability. Mean residence times (MRTs) of GW on a sand barrier island were determined. They ranged from 37 years to more than 150 years for tritium and had a much larger range (modern to 5000 years) for carbon-14. Perched aquifer systems in the unsaturated zone and peat formations around wetlands are the most likely cause of longer MRTs, as they have a significant impact on regional recharge and flow diversion.
Christopher Vincent Henri, Thomas Harter, and Efstathios Diamantopoulos
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Non-point source contaminations of aquifers are complex to model, predict and manage. This study uses numerical and stochastic methods to address the importance of key sources of spatial variability. We show that heterogeneity in recharge and contaminant loading does not significantly impact management metrics and could be simplified. Also, homogenizing physical properties has more impact on predictions, but can provide useful information on concentration statistics in a regional analysis.
Behzad Ataie-Ashtiani and Craig T. Simmons
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We revisit and shed light on the textbook The Extraction of Hidden Waters by the Persian mathematician and engineer Abubakr Mohammad Karaji. Ground-breaking ideas and descriptions of hydrological and hydrogeological perceptions such as components of the hydrological cycle, groundwater quality and driving factors for groundwater flow were presented in the book. We speculate that Karaji's book is the first of its kind to provide a construction and maintenance manual for an engineering project.
Zhe Zhang, Yanping Li, Michael Barlage, Fei Chen, Gonzalo Miguez-Macho, Andrew Ireson, and Zhenhua Li
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The groundwater regime in cold regions is strongly impacted by the soil freeze–thaw processes and semiarid climatic conditions. In this paper, we incorporate groundwater dynamics in the Noah-MP land surface model to simulate the water exchange between the unsaturated soil zone and an unconfined aquifer in the Prairie Pothole Region. The water table dynamics are reasonably simulated. The water budget of groundwater aquifer under current and future climate are also investigated.
Cornelia Wilske, Axel Suckow, Ulf Mallast, Christiane Meier, Silke Merchel, Broder Merkel, Stefan Pavetich, Tino Rödiger, Georg Rugel, Agnes Sachse, Stephan M. Weise, and Christian Siebert
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Despite feeding several million people, the flow system and inter-aquifer communication within one of the major aquifer systems in Israel and the West Bank is still poorly understood. Applying a combination of inorganic elements, anthropogenic organic trace substances and classical environmental age-dating tracers like 3H, CFCs, SF6 and 36Cl / Cl, groundwater flow patterns, mixing end-members, transport times and recharge estimates have been obtained despite very limited data.
Joeri van Engelen, Jarno Verkaik, Jude King, Eman R. Nofal, Marc F. P. Bierkens, and Gualbert H. P. Oude Essink
Hydrol. Earth Syst. Sci., 23, 5175–5198, https://doi.org/10.5194/hess-23-5175-2019, https://doi.org/10.5194/hess-23-5175-2019, 2019
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The Nile Delta is an important agricultural area with a fast-growing population, relying increasingly on groundwater. However, saline groundwater extends far land-inward, rendering groundwater close to the coastal zone useless for consumption or agriculture. It normally is assumed that this is caused by mixing due to velocity differences, but here we show that it might also be caused by the coastline being located more land-inward 8000 years ago.
Julian Koch, Helen Berger, Hans Jørgen Henriksen, and Torben Obel Sonnenborg
Hydrol. Earth Syst. Sci., 23, 4603–4619, https://doi.org/10.5194/hess-23-4603-2019, https://doi.org/10.5194/hess-23-4603-2019, 2019
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This study explores novel modelling avenues using machine learning in combination with process-based models to predict the shallow water table at high spatial resolution. Due to climate change and anthropogenic impacts, the shallow groundwater is rising in many parts of the world. In order to adapt to risks induced by groundwater flooding, new modelling tools need to emerge. In this study, we found that machine learning is capable of reaching the required accuracy and resolution.
Donald W. Vasco, Joseph Doetsch, and Ralf Brauchler
Hydrol. Earth Syst. Sci., 23, 4541–4560, https://doi.org/10.5194/hess-23-4541-2019, https://doi.org/10.5194/hess-23-4541-2019, 2019
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This paper presents the application of a new approach for calculating the path of a pressure transient in a heterogeneous porous medium containing a slightly compressible fluid. Unlike previous asymptotic approaches, the expressions for the path and travel time are valid in the presence of rapid variations in material properties. The technique is applied to both synthetic transient pressure variations from a test example and actual field data from a field experiment in Widen, Switzerland.
Daniel Erdal and Olaf A. Cirpka
Hydrol. Earth Syst. Sci., 23, 3787–3805, https://doi.org/10.5194/hess-23-3787-2019, https://doi.org/10.5194/hess-23-3787-2019, 2019
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Assessing how sensitive uncertain model parameters are to observed data can be done by analyzing an ensemble of model simulations in which the parameters are varied. In subsurface modeling, this involves running heavy models. To reduce time wasted simulating models which show poor behavior, we use a fast polynomial model based on a simple parameter decomposition to approximate the behavior prior to
full-model simulation. This largely reduces the cost for the global sensitivity analysis.
Wei Mao, Yan Zhu, Heng Dai, Ming Ye, Jinzhong Yang, and Jingwei Wu
Hydrol. Earth Syst. Sci., 23, 3481–3502, https://doi.org/10.5194/hess-23-3481-2019, https://doi.org/10.5194/hess-23-3481-2019, 2019
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A new quasi-3-D model was developed by coupling a soil water balance model with MODFLOW iteratively for regional-scale water flow modeling. The model was tested to be effective and efficient with well-maintained mass balance. A modeling framework was developed to organize the coupling scheme and to handle the pre- and post-processing information. The model is then used to evaluate groundwater recharge in a real-world application, which shows the model practicability in regional-scale problems.
Ning Li, Wolfgang Kinzelbach, Haitao Li, Wenpeng Li, and Fei Chen
Hydrol. Earth Syst. Sci., 23, 2823–2840, https://doi.org/10.5194/hess-23-2823-2019, https://doi.org/10.5194/hess-23-2823-2019, 2019
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Groundwater heads within an administrative unit are influenced not only by inside drivers, but also by outside drivers. To assess the efficiency of groundwater management of the administrative unit, we propose the decomposition of groundwater heads within the unit into inside and outside contributions by using three numerical groundwater models. The method is successfully demonstrated using Guantao County, China.
Zhenjiao Jiang, Dirk Mallants, Luk Peeters, Lei Gao, Camilla Soerensen, and Gregoire Mariethoz
Hydrol. Earth Syst. Sci., 23, 2561–2580, https://doi.org/10.5194/hess-23-2561-2019, https://doi.org/10.5194/hess-23-2561-2019, 2019
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Paleovalleys often form productive aquifers in the semiarid and arid areas. A methodology based on deep learning is introduced to automatically generate high-resolution 3-D paleovalley maps from low-resolution electrical conductivity data derived from airborne geophysical surveys. It is validated by borehole logs and the surface valley indices that the proposed method in this study provides an effective tool for regional-scale paleovalley mapping and groundwater exploration.
Nicholas D. Woodman, William G. Burgess, Kazi Matin Ahmed, and Anwar Zahid
Hydrol. Earth Syst. Sci., 23, 2461–2479, https://doi.org/10.5194/hess-23-2461-2019, https://doi.org/10.5194/hess-23-2461-2019, 2019
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We show that a conventional hydraulic understanding of groundwater level fluctuation is too simplistic for the extensive floodplains of Bangladesh and West Bengal. This is crucial because 150 million people of the region rely on groundwater for drinking and irrigation. We describe a more complex situation: the coupled hydro-mechanical action of surface water coming and going as the seasons change. Our model results will assist sustainable management of groundwater resources across the region.
Quanrong Wang and Hongbin Zhan
Hydrol. Earth Syst. Sci., 23, 2207–2223, https://doi.org/10.5194/hess-23-2207-2019, https://doi.org/10.5194/hess-23-2207-2019, 2019
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New multi-species reactive models of the four-phase SWPP test were presented considering the wellbore storages for both groundwater flow and solute transport and a finite-aquifer hydraulic diffusivity, which were ignored in previous studies. The models of the wellbore storage for solute transport were proposed based on the mass balance, and the sensitivity analysis and uniqueness analysis were employed to investigate the assumptions used in previous studies on the parameter estimation.
Wolfgang Dreybrodt and Franci Gabrovšek
Hydrol. Earth Syst. Sci., 23, 1995–2014, https://doi.org/10.5194/hess-23-1995-2019, https://doi.org/10.5194/hess-23-1995-2019, 2019
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Numerical models of wormhole formation in fractured porous media provide basic insights on the evolution of complex conduit systems in karst aquifers. In this work we use a time-propagating reactive flow model to explore the evolution of wormholes in a 2-D grid of fractures. We demonstrate physically meaningful mechanisms leading to the formation of individual wormholes and the competition between a set of evolving wormholes.
Ching-Sheng Huang, Ya-Hsin Tsai, Hund-Der Yeh, and Tao Yang
Hydrol. Earth Syst. Sci., 23, 1323–1337, https://doi.org/10.5194/hess-23-1323-2019, https://doi.org/10.5194/hess-23-1323-2019, 2019
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The study develops a new model describing head fluctuation induced by oscillatory pumping test (OPT) in an unconfined aquifer with effects of delayed gravity drainage (DGD) and initial condition regarding the hydraulic head prior to OPT. The DGD reduces to instantaneous gravity drainage when a dimensionless parameter exceeds 500. A pseudo-steady-state model excluding initial condition causes a time-shift from the actual transient model in predicting simple harmonic motion of head fluctuation.
Nimrod Inbar, Eliahu Rosenthal, Fabien Magri, Marwan Alraggad, Peter Möller, Akiva Flexer, Joseph Guttman, and Christian Siebert
Hydrol. Earth Syst. Sci., 23, 763–771, https://doi.org/10.5194/hess-23-763-2019, https://doi.org/10.5194/hess-23-763-2019, 2019
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In areas of enigmatic hydrology, water scarcity, and transboundary water resources, management strategies should rely on comprehensive modeling which must be based on realistic geometry, including all relevant structural features. Based on available geophysical and geological data, a new faulting pattern in the Lower Yarmouk Gorge is suggested as a basis for hydrogeological modeling. Furthermore, unexpected pull-apart basin rim fault evolution is discussed in the context of tectonic collision.
I-Hsien Lee, Chuen-Fa Ni, Fang-Pang Lin, Chi-Ping Lin, and Chien-Chung Ke
Hydrol. Earth Syst. Sci., 23, 19–34, https://doi.org/10.5194/hess-23-19-2019, https://doi.org/10.5194/hess-23-19-2019, 2019
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Few studies focused on the direct solution of the ADE for 3-D DFNs. The study is the first to solve the ADE and focus on assessing the velocity uncertainty in 3-D DFNs. The velocity uncertainty shows a limited range of influence close to the mean diameter of a fracture. The information is useful for engineering designs at sites with fractured rocks. We quantified that the tracer test in wells might lead to the overestimation of mean concentration and induce high uncertainty in fractured media.
Qiyu Chen, Gregoire Mariethoz, Gang Liu, Alessandro Comunian, and Xiaogang Ma
Hydrol. Earth Syst. Sci., 22, 6547–6566, https://doi.org/10.5194/hess-22-6547-2018, https://doi.org/10.5194/hess-22-6547-2018, 2018
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One of the critical issues in MPS simulation is the difficulty in obtaining a credible 3-D training image. We propose an MPS-based 3-D reconstruction method on the basis of 2-D cross sections, making 3-D training images unnecessary. The main advantages of this approach are the high computational efficiency and a relaxation of the stationarity assumption. The results, in comparison with previous MPS methods, show better performance in portraying anisotropy characteristics and in CPU cost.
Rogier Westerhoff, Paul White, and Gonzalo Miguez-Macho
Hydrol. Earth Syst. Sci., 22, 6449–6472, https://doi.org/10.5194/hess-22-6449-2018, https://doi.org/10.5194/hess-22-6449-2018, 2018
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Our study improved a global-scale groundwater model to build the first nationwide estimate of the water table surface in New Zealand. By identifying the main alluvial aquifers with high spatial detail, we showed that this model can help better delineate aquifer boundaries. In catchment studies we demonstrated excellent correlation with ground observations and provided water table estimates where data were sparse and across regions, which could help solve trans-boundary issues between catchments.
Yonatan Ganot, Ran Holtzman, Noam Weisbrod, Anat Bernstein, Hagar Siebner, Yoram Katz, and Daniel Kurtzman
Hydrol. Earth Syst. Sci., 22, 6323–6333, https://doi.org/10.5194/hess-22-6323-2018, https://doi.org/10.5194/hess-22-6323-2018, 2018
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In recent years, surpluses of desalinated seawater (DSW) are stored in the Israeli coastal aquifer. We monitor DSW spread in the aquifer using the difference between isotope composition of reverse-osmosis DSW and natural fresh water, which simplifies the system to two distinct end-members. A hydrogeological flow and transport model is used to demonstrate the robustness of this simplification, predict the future spread of DSW in the aquifer and mixing in wells, and estimate DSW recovery efficacy.
Claudia Cherubini, Nicola Pastore, Dimitra Rapti, and Concetta I. Giasi
Hydrol. Earth Syst. Sci., 22, 5211–5225, https://doi.org/10.5194/hess-22-5211-2018, https://doi.org/10.5194/hess-22-5211-2018, 2018
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The present study investigates the hotspots of groundwater contamination in the industrial area of Modugno (Bari – southern Italy) where the limestone aquifer has a fractured and karstic nature. The characterization of the dynamics of fluid flow and solute transport in fractured aquifers is of broad concern worldwide, especially when considered in relation to water resource exploitation, because fractured aquifers serve as the primary source of drinking water for many areas of the world.
Rena Meyer, Peter Engesgaard, Klaus Hinsby, Jan A. Piotrowski, and Torben O. Sonnenborg
Hydrol. Earth Syst. Sci., 22, 4843–4865, https://doi.org/10.5194/hess-22-4843-2018, https://doi.org/10.5194/hess-22-4843-2018, 2018
Khabat Khosravi, Mahdi Panahi, and Dieu Tien Bui
Hydrol. Earth Syst. Sci., 22, 4771–4792, https://doi.org/10.5194/hess-22-4771-2018, https://doi.org/10.5194/hess-22-4771-2018, 2018
Yong Xiao, Jingli Shao, Shaun K. Frape, Yali Cui, Xueya Dang, Shengbin Wang, and Yonghong Ji
Hydrol. Earth Syst. Sci., 22, 4381–4400, https://doi.org/10.5194/hess-22-4381-2018, https://doi.org/10.5194/hess-22-4381-2018, 2018
Martin Suchy, Leonard I. Wassenaar, Gwyn Graham, and Bernie Zebarth
Hydrol. Earth Syst. Sci., 22, 4267–4279, https://doi.org/10.5194/hess-22-4267-2018, https://doi.org/10.5194/hess-22-4267-2018, 2018
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Groundwater contamination by nitrate is a global problem. Understanding sources and transformations of nitrate in aquifers is key to inform remediation, and isotopes of nitrate (15N, 18O) are used for this. Most isotopic investigations are synoptic studies. Here we show that high-frequency nitrate isotope sampling of aquifer recharge better reveals the impact of short-term changes in land use practice or climatic conditions that need to be taken into account when considering long-term trends.
Elliott P. Morrill and Joseph F. Becker
Hydrol. Earth Syst. Sci., 22, 3761–3775, https://doi.org/10.5194/hess-22-3761-2018, https://doi.org/10.5194/hess-22-3761-2018, 2018
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The goal of the paper was to develop a method to identify the length and severity of flood events for (re)insurance and risk management usage. We took publically available nationwide discharge data from the USGS to apply our method to. We were able to define a peak and a threshold for each individual site, which served as the basis of our method. The hope was that the method would help replace the current standard hours clause and hopefully improve how flood insurance is covered internationally.
David Pulido-Velazquez, Arianna Renau-Pruñonosa, Carlos Llopis-Albert, Ignacio Morell, Antonio-Juan Collados-Lara, Javier Senent-Aparicio, and Leticia Baena-Ruiz
Hydrol. Earth Syst. Sci., 22, 3053–3074, https://doi.org/10.5194/hess-22-3053-2018, https://doi.org/10.5194/hess-22-3053-2018, 2018
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We have developed a method to assess hydrological impacts of future potential global change (GC) scenarios in a coastal aquifer, the Plana Oropesa-Torreblanca aquifer. Quantity and quality issues are simultaneously considered. It includes the generation of potential GC scenarios involving different sources of uncertainty and an integrated modelling framework to assess their impacts. It is a valuable tool to improve our aquifer knowledge and to help in the analysis of management strategies.
Martina Siena and Monica Riva
Hydrol. Earth Syst. Sci., 22, 2971–2985, https://doi.org/10.5194/hess-22-2971-2018, https://doi.org/10.5194/hess-22-2971-2018, 2018
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The development of sustainable strategies for groundwater resources exploitation in coastal regions is subordinated to the characterization of seawater intrusion (SWI) phenomena. We develop a numerical model tailored to a real coastal aquifer to investigate quantitatively the joint effects of hydraulic properties heterogeneity and pumping configuration on saltwater inland penetration and saltwater–freshwater mixing. Our results allowed identifying efficient scenarios for the reduction of SWI.
Katherine M. Ransom, Andrew M. Bell, Quinn E. Barber, George Kourakos, and Thomas Harter
Hydrol. Earth Syst. Sci., 22, 2739–2758, https://doi.org/10.5194/hess-22-2739-2018, https://doi.org/10.5194/hess-22-2739-2018, 2018
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We estimated a probability distribution of nitrogen loading rates for crop and land-use groups from regional groundwater data. Water & natural land use had the lowest estimated rates, while dairy land use had the highest. Most results compare favorably to previous estimates, though mass balance estimates for several crop groups were higher than our model estimates. The information can provide a better assessment of land-use impacts to water quality absent information on farm nutrient management.
Sebastian Huizer, Max Radermacher, Sierd de Vries, Gualbert H. P. Oude Essink, and Marc F. P. Bierkens
Hydrol. Earth Syst. Sci., 22, 1065–1080, https://doi.org/10.5194/hess-22-1065-2018, https://doi.org/10.5194/hess-22-1065-2018, 2018
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For a large beach nourishment called the Sand Engine we have examined the impact of groundwater recharge, tides, storm surges, and geomorphological changes on the growth of the fresh groundwater resources between 2011 and 2016. With detailed model simulations of these coastal processes we were able to get a good match with field measurements, and demonstrated the importance of wave runup and coastal erosion in studies on fresh groundwater in such dynamic coastal environments.
Pietro Teatini, Giovanni Isotton, Stefano Nardean, Massimiliano Ferronato, Annamaria Mazzia, Cristina Da Lio, Luca Zaggia, Debora Bellafiore, Massimo Zecchin, Luca Baradello, Francisco Cellone, Fabiana Corami, Andrea Gambaro, Giovanni Libralato, Elisa Morabito, Annamaria Volpi Ghirardini, Riccardo Broglia, Stefano Zaghi, and Luigi Tosi
Hydrol. Earth Syst. Sci., 21, 5627–5646, https://doi.org/10.5194/hess-21-5627-2017, https://doi.org/10.5194/hess-21-5627-2017, 2017
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We investigate the effects of digging a navigable canal on the hydrogeological system underlying a coastal lagoon. The research has been promoted by the Venice Water Authority, which is investigating different possibilities to avoid the passage of large cruise ships through the historic center of Venice, Italy. Numerical simulations supported by a proper hydrogeological characterization show that the exchange of water and contaminants from the subsurface and surface systems will be significant.
Yehuda Levy, Roi H. Shapira, Benny Chefetz, and Daniel Kurtzman
Hydrol. Earth Syst. Sci., 21, 3811–3825, https://doi.org/10.5194/hess-21-3811-2017, https://doi.org/10.5194/hess-21-3811-2017, 2017
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Nitrate–nitrogen is a groundwater contaminant worldwide that originates commonly from agricultural fertilization. In this work, we built a computer model which follows the fate of nitrogen from land surface to deep (~100 m) and distant (~km) groundwater wells. The model succeeded estimating total groundwater nitrate, yet failed to point-estimate contaminated wells, extra assumptions fixed it. This enabled prediction of future groundwater–nitrate which revealed the need to reduce fertilization.
Cybèle Cholet, Jean-Baptiste Charlier, Roger Moussa, Marc Steinmann, and Sophie Denimal
Hydrol. Earth Syst. Sci., 21, 3635–3653, https://doi.org/10.5194/hess-21-3635-2017, https://doi.org/10.5194/hess-21-3635-2017, 2017
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This paper aims to improve the understanding of transport processes in karst aquifers, which remains a great challenge due to its complex nature. A framework is proposed to identify and quantify the spatio-temporal variability of lateral exchanges along a karst conduit network during flood events, for both flow and solute transport. An inverse problem approach is used on discharge and water mineralization data sets and gives new insights into the hydrogeological behavior of such complex systems.
Dirk Scheer, Wilfried Konrad, Holger Class, Alexander Kissinger, Stefan Knopf, and Vera Noack
Hydrol. Earth Syst. Sci., 21, 2739–2750, https://doi.org/10.5194/hess-21-2739-2017, https://doi.org/10.5194/hess-21-2739-2017, 2017
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Stakeholder participation in numerical modeling of brine migration due to injection of CO2 into deep saline aquifers is tested in this work. Part 1 reports the process of participatory modeling in the development of a numerical model and Part 2 discusses essential technical findings obtained through this model, showing that notable increases in salt concentrations are confined to regions where they were already high a priori and where barrier layers are discontinuous.
Alexander Kissinger, Vera Noack, Stefan Knopf, Wilfried Konrad, Dirk Scheer, and Holger Class
Hydrol. Earth Syst. Sci., 21, 2751–2775, https://doi.org/10.5194/hess-21-2751-2017, https://doi.org/10.5194/hess-21-2751-2017, 2017
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Stakeholder participation in numerical modeling of brine migration due to injection of CO2 into deep saline aquifers is tested in this work. Part 1 reports the process of participatory modeling on the development of a numerical model and Part 2 discusses essential technical findings obtained through this model showing that notable increases in salt concentrations are confined to regions where they were already high a priori and where barrier layers are discontinuous.
Rabia Slimani, Abdelhamid Guendouz, Fabienne Trolard, Adnane Souffi Moulla, Belhadj Hamdi-Aïssa, and Guilhem Bourrié
Hydrol. Earth Syst. Sci., 21, 1669–1691, https://doi.org/10.5194/hess-21-1669-2017, https://doi.org/10.5194/hess-21-1669-2017, 2017
Ahmad Ali Behroozmand, Pietro Teatini, Jesper Bjergsted Pedersen, Esben Auken, Omar Tosatto, and Anders Vest Christiansen
Hydrol. Earth Syst. Sci., 21, 1527–1545, https://doi.org/10.5194/hess-21-1527-2017, https://doi.org/10.5194/hess-21-1527-2017, 2017
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Within the framework of the EU project IMPROWARE, our goal was to investigate a Mediterranean coastal aquifer in Egypt and develop scenarios for artificial aquifer remediation and recharge. The results of an extensive hydrogeophysical investigation were successfully used as an input in regional and local hydrological models to understand the hydrological evolution of the area. The research outcomes clearly highlight the effectiveness of using advanced geophysical and modeling methodologies.
Nikolaj Kruse Christensen, Ty Paul A. Ferre, Gianluca Fiandaca, and Steen Christensen
Hydrol. Earth Syst. Sci., 21, 1321–1337, https://doi.org/10.5194/hess-21-1321-2017, https://doi.org/10.5194/hess-21-1321-2017, 2017
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This study presents a new method for coupling a 3-D geophysical model with a 3-D groundwater model for improved groundwater model construction and prediction accuracy. The hydrological data consist of 35 hydraulic head measurements and one river discharge measurement, while the geophysical data set consists of 6300 measurement positions. The results demonstrate that the geophysical inversion strategy significantly affects the construction and prediction capability of the groundwater model.
Cristina Valhondo, Lurdes Martínez-Landa, Jesús Carrera, Juan J. Hidalgo, Isabel Tubau, Katrien De Pourcq, Alba Grau-Martínez, and Carlos Ayora
Hydrol. Earth Syst. Sci., 20, 4209–4221, https://doi.org/10.5194/hess-20-4209-2016, https://doi.org/10.5194/hess-20-4209-2016, 2016
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We performed and evaluated a pulse injection tracer test in an artificial recharge system to understand the fate of potential contaminants.
A 2-D multilayer model (under homogeneous and heterogeneous medium hypothesis) was used to evaluate the measured breakthrough curves at six points.
Both homogeneous and heterogeneous models reproduce the long tails observed. This implies that the shapes of the breakthrough curves are caused not only by heterogeneity, but also by the mean flow structure.
Stefan Banzhaf and Klaus H. Hebig
Hydrol. Earth Syst. Sci., 20, 3719–3737, https://doi.org/10.5194/hess-20-3719-2016, https://doi.org/10.5194/hess-20-3719-2016, 2016
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We present a review of how transport and fate of micropollutants, i.e., pharmaceuticals and pesticides that are found in groundwater worldwide, can be studied using a laboratory setup of column experiments. Hereby, transport relevant processes are presented and which compounds and which of their properties can be studied with column experiments. We discuss advantages of this laboratory method and show weaknesses and problems.
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Short summary
We used the past century’s time series of observed climate, containing non-stationary signals of atmospheric oscillations, global warming, and global dimming/brightening, to quantify possible systematic errors that may be introduced in estimates of potential evaporation and in hydrological modeling studies due to straightforward application of i) the common two-step approach for potential evaporation specifically, and ii) fixed instead of time-variant model parameters in general.
We used the past century’s time series of observed climate, containing non-stationary signals...
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