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城市建设理论研究(电子版) 2018年第33期 154-155页

作者：华国欢刘泽东陈琳熊玮玮江西应用技术职业学院

赣州市高校区人群密集,生活饮用水的安全性值得提高警惕,本文就visual modflow地下水数值模拟软件,对研究区水文地质调查的基础上,建立水文地质概念模型、对地下水流场特征进行模拟,确定水文地质参数分区,并对参数进行识别、验证。初步... 详细信息

赣州市高校区人群密集,生活饮用水的安全性值得提高警惕,本文就visual modflow地下水数值模拟软件,对研究区水文地质调查的基础上,建立水文地质概念模型、对地下水流场特征进行模拟,确定水文地质参数分区,并对参数进行识别、验证。初步对高校区地下水污染的风险性作出了预测及评价。

关键词： visual modflow 模拟地下水污染评价

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Simulation of river aquifer dynamics and water scarcity in left bank of river Ganges (Padma), Bangladesh

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ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY 2025年 1-26页

作者： Rahman, Md. Arifur Jahan, Chowdhury Sarwar Rahaman, Md. Ferozur Mazumder, Quamrul Hasan Univ Rajshahi Dept Geol & Min Rajshahi 6025 Bangladesh Univ Rajshahi Inst Environm Sci Rajshahi 6025 Bangladesh

The drought-prone left bank of river Ganges (Padma) in the north-western part of Bangladesh is facing challenges of water scarcity. Unfortunately, here the study on insightful numerical modeling for interaction for surface water (SW) of rivers and nearby groundwater (GW) of aquifer system is lacking. So, present study has been carried out on simulation of GW flow characteristics, its dynamic exchanges with SW and prediction of long-run scenario using visual modflow software. The study reveals that groundwater level (GWL) follows topography of the area, and discharge capacity varies with time due to reduction in the river water flow immediately after the rainy season, and the over-exploitation of groundwater due to increasing irrigation demand. Higher GWL head reveals higher discharging rate and its maximum velocity vectors also reflects major outflow towards river basins. At present, the simulated total deficit of water resource is 2,044,000 L/year. Higher declining rate of GWL also happens due to reducing amount of groundwater recharge due to rainfall scarcity in comparison to demand. The groundwater scenario for the period 1980-2020 and predicted up to 2050 reveals the steadily declining trend (nearly four times) along with irrigation demand for country's food security, and the area will face severe water scarcity if appropriate adaptation measures will be not be taken timely. Finally, this river and the aquifer model presents a window for stronger understanding the relationship of Surface Water-Ground water system and thereby finding the potential causes of groundwater depletion in this drought prone area that will help to develop appropriate water resources management strategy in this region. It differs with the concept of supply-demand scenario from widely marked nature-based solution to seasonal freshwater storage capture dubbed the 'Bengal Water Machine - GWM'.

关键词： Bangladesh Ganges river River-aquifer dynamics Simulation visual modflow

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Environmental impact assessment of risk associated with groundwater overdraft remediation in cone of depression, Jining, China

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ENVIRONMENTAL GEOLOGY 2007年第4期53卷 751-762页

作者： Ong'or, B. T. I. Shu, Long-cang Liu, Pei-gui Hohai Univ Coll Water Resources & Environm Nanjing 210098 Peoples R China Western Univ Coll Sci & Technol Kakamega 50100 Kenya

In this paper, a simple scenario and probabilistic approach is used to assess the potential groundwater risk due to proposed overdraft remedial actions in cone of depression, Jining City, China. Focusing on the concentrations of Chloride ions (Cl-) and total hardness (TH), the impact of artificial recharge and reduced pumping on groundwater quality and quantity is analysed by using the three-dimensional finite difference groundwater flow and transport model, visual modflow, to simulate groundwater flow and transport within the study area based on scenarios, and utilizes SURFER software to map risk levels. Although 5, 10 or 15% reduced pumping with artificial recharge leads to more decrease in Cl- and TH concentrations than the 25%, less volume increase is achieved for the remediation of land subsidence and other environmental problems in the cone of depression. The Cl- concentrations in recovered groundwater are within the desired concentration of 200 mg/l;however, TH in some cases are above the maximum permissible limit of 500 mg/l, with an exceedence probability of about 0.67 for recharge and recharge with reduced pumping at 25%. The presence of fractures and hydrogeological complexity greatly determines impacts of remediation, and the 22% reduced pumping with artificial recharge offers an optimum strategy for overdraft remediation in the Jining cone of depression.

关键词： risk assessments artificial recharge reduced pumping groundwater quality and quantity visual modflow Jining China

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Simulations of groundwater-surface water interaction and particle movement due to the effect of weir construction in the sub-watershed of the river Labe in the town of Decin

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ENVIRONMENTAL MONITORING AND ASSESSMENT 2014年第11期186卷 7755-7770页

作者： Matula, S. Mekonnen, G. B. Bat'kova, K. Nesetril, K. Czech Univ Life Sci Dept Water Resources Fac Agrobiol Food & Nat Resources Prague 16521 6 Czech Republic AQUATEST As Prague 15200 5 Czech Republic

Steady- and transient-state simulations of groundwater flow and particle movement in the sub-watershed of the river Labe in DAiin town was carried out using visual modflow software. The simulations were performed for calibration and for the scenarios that the change in the water level of the river Labe was undergoing. Steady-state simulation was carried out for the sake of calibration of model outputs. For transient simulation, two different scenarios were considered in order to investigate the response of the aquifer system to the stresses applied on surface water of the river. The simulation results have shown that the surface water and groundwater interactions, and the subsequent particle movement were affected by the stresses applied on the surface water in the river Labe. The first scenario involved the rapid recharge of surface water to the aquifer in the vicinity of the river while particles still move towards the river at the places far away from the river. At the end of the second scenario, particles still tend to move towards the river slowly and finally tend to stay within the aquifer as equilibrium of hydraulic gradient is reached between the surface and groundwater levels. The time series graphs of hydraulic heads at all observation wells show that the groundwater level in the surrounding aquifer rises significantly as a result of recharges from the river. The local water balance of the study area was calculated and expressed as the rates of water entering and leaving the system. At the end of the second scenario, the difference between the rate of flow into and out of the model area was 0.73 m(3) day(-1).

关键词： River Labe Particle tracking Groundwater visual modflow Simulation Steady state Transient state Weir Water balance

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Potential plant species distribution in the Yellow River Delta under the influence of groundwater level and soil salinity

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ECOHYDROLOGY 2011年第6期4卷 744-756页

作者： Fan, Xiaomei Pedroli, Bas Liu, Gaohuan Liu, Hongguang Song, Chuangye Shu, Longcang CAS LREIS Inst Geog Sci & Nat Resources Res Beijing 100101 Peoples R China Nanjing Univ Informat Sci & Technol Sch Remote Sensing Nanjing 210044 Peoples R China Wageningen Univ Landscape Ctr NL-6700 AA Wageningen Netherlands CAS LRSDM Inst Geog Sci & Nat Resources Res Beijing 100101 Peoples R China Hohai Univ Coll Water Resources & Environm Nanjing 210098 Peoples R China

This article describes a multidisciplinary approach to assessing potential vegetation types. The relation between vegetation distribution as derived from field survey and habitat characteristics in the Yellow River Delta (YRD) was analyzed using detrended canonical correspondence analysis (DCCA). The three-dimensional groundwater numerical simulation model modflow yielded an accurate distribution of the shallow groundwater table within the study area. Groundwater table and soil salinity appeared to have the largest influence on the distribution patterns of specific indicator species. The quantitative relationships between species presence and environmental factors were further explored using logistic regression, allowing for the prediction of potential species distribution in relation to fluctuations in groundwater depth and soil salinity. Based on this, potential distribution maps for specific plant species and their communities were generated using ArcGIS. The potential vegetation map was compared to the actual vegetation map (interpreted from SPOT imagery), which leads to a discussion of the main factors responsible for fragmentation and degradation of the local vegetation system. Copyright (C) 2010 John Wiley & Sons, Ltd.

关键词： groundwater-dependent ecosystem detrended canonical correspondence analysis general linear model visual modflow spatial analysis degradation fragmentation

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PHOSPHORUS MIGRATION IN AN UNCONFINED AQUIFER USING modflow AND MT3DMS

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JOURNAL OF ENVIRONMENTAL ENGINEERING AND LANDSCAPE MANAGEMENT 2011年第4期19卷 271-277页

作者： Saghravani, Seyed Reza Mustapha, Sa'ari B. Ibrahim, Shaharin B. Yusoff, Mohd Kamil Saghravani, Seyed Fazlolah Univ Putra Malaysia Fac Engn Dept Chem & Environm Engn Upm Serdang 43400 Selangor Darul Malaysia Univ Putra Malaysia Fac Environm Studies Dept Environm Sci Upm Serdang 43400 Selangor Darul Malaysia Shahrood Univ Technol Dept Civil & Architectural Engn Sch Civil & Architectural Engn Shahrood Semnan Province Iran

The rapid rate of urbanization and increasing demand for water in agriculture and industry are the reasons for considering groundwater as a main source of water. This can be a prologue to contamination of groundwater. Phosphorus as a type of nutrient that is derived from fertilizers has adverse effect on surface and subsurface water. The aim of this study was to monitor groundwater quality and the fate of contamination via three dimensional finite-different groundwater flow simulation (i.e. visual modflow version 4.2.). The study area was the campus of University Putra Malaysia. The monitoring indicated that the concentration of phosphorus is higher than those imposed by the standard of the Malaysian Department of Environment (DOE). Results of contamination transport modelling revealed the different rates of phosphorus transport in layers at the end of simulation period.

关键词： groundwater flow groundwater simulation phosphorus pollution transport visual modflow Malaysia

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Groundwater simulation for efficient water resources management in Zhangye Oasis, Northwest China

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ENVIRONMENTAL EARTH SCIENCES 2016年第8期75卷 1-13页

作者： Chen, Shilei Yang, Wei Huo, Zailin Huang, Guanhua China Agr Univ Ctr Agr Water Res China 17 Qinghua East Rd Beijing 100083 Peoples R China Minist Water Resources Songliao Water Resources Commiss Changchun 130021 Peoples R China

Human activities, especially groundwater exploitation for agricultural production, have resulted in an excessive decline of the groundwater level and posed a serious threat of aquifer overdraft in the arid and semi-arid region of northwest China. For the purpose of managing water resources effectively, this study applied the visual modflow package to simulate the aquifer changes under various agricultural scenarios from 2009 to 2018 in Zhangye Oasis, the middle reaches of the Heihe River Basin, Northwest China. In addition to current conditions, limited irrigation and channel leakage prevention, which represent the essential trend of today's irrigation, were set as future water-saving agricultural scenarios. As the results show, under current water resource management conditions, groundwater levels fall at an alarming rate of 1 m/year in irrigation areas and 0.2 m/year in non-irrigation areas;moreover, the annual groundwater budget in the oasis will be -7.64 x 10(8) m(3). In addition, taking agricultural water saving measures can alleviate the groundwater problems efficiently, and the most promising water resource management for the Zhangye oasis could be decreasing the irrigation quota and the leakage coefficient of the canal system to 80 % of the current level and 0.3, respectively. Contrast of the two optimal scenarios indicates that limited irrigation is more effective than channel leakage prevention for groundwater protection in the Zhangye Oasis.

关键词： Groundwater simulation visual modflow Water resources management Water-saving agriculture Zhangye Oasis

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Transient groundwater modelling with spatio-temporally variable fluxes in a complex aquifer system: new approach in defining boundary conditions for a transient flow model

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CIVIL ENGINEERING AND ENVIRONMENTAL SYSTEMS 2012年第1期29卷 1-21页

作者： Psarropoulou, Effie T. Karatzas, George P. Tech Univ Crete Dept Environm Engn Polytechneioupolis 73100 Chania Greece

Long-termwater resource planning requires both spatial and temporal information on groundwater recharge in order to properly manage not only water use and exploitation but also land-use allocation and development. In this context, a three-dimensional transient numerical model is developed to support management of groundwater resources and decision analysis for the coastal plain of Corinthos in Greece. Transient simulations usually are used to analyse time-dependent problems such as climate change and groundwater-level change. Among transient models, the most reliable but also the least explored, probably due to the demanding input data requirements, are the models with temporally variable recharge, also termed as fully transient models. In these models, the temporal variability of heads is dependent not only on the temporal variability of aquifer storage but also on the temporal variability of fluxes. In order to arrive at a credible set of flux data as boundary conditions for the numerical model, a sinusoidal equation is developed to simulate the missing water-level data and to forecast the future sequential records of the expected recharge. The results of the developed model reveal that at least two periodicities can be identified in the observed subsurface head-level data.

关键词： transient flow model spatio-temporally variable recharge coastal alluvial aquifer of Corinthos visual modflow sinusoidal equation

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Groundwater modeling and demarcation of groundwater protection zones for Tirupur Basin - A case study

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JOURNAL OF HYDRO-ENVIRONMENT RESEARCH 2011年第3期5卷 197-212页

作者： Saravanan, R. Balamurugan, R. Karthikeyan, M. S. Rajkumar, R. Anuthaman, N. G. Gopalakrishnan, A. Navaneetha Anna Univ Ctr Water Resources Madras 600025 Tamil Nadu India Anna Univ Ctr Environm Studies Madras 600025 Tamil Nadu India

Groundwater is a renewable resource and has to be protected from contamination. The concept of a zone of protection for areas containing groundwater has been developed and adopted in a number of countries. One such area is Tirupur, (Tamil Nadu, India) which is an and region and rapid expansion of the textile industry has taken place with no associated development of supporting infrastructure or institutional capacity. Textile production, particularly dyeing and bleaching is water intensive and generates large quantities of effluent. One of the most significant challenges for the Tirupur textile industry today is water for bleaching and disposal of effluent. Demarcation of groundwater protection zones has become necessary to facilitate recharging of the aquifer to meet the water demand. These zones are considered sensitive zones and should be free from activities such as the groundwater over exploitation, effluent discharge and construction of barriers. Groundwater flow for Tirupur Block was simulated using visual modflow version 4.1. The model was run for the year 1998-99 with transient flow condition. Taking June 1998 water level as initial head, the model was run to simulate water level up to May 1999 and validated with the observed data for all the six wells which are distributed over six different zones. The results obtained from the simulation were used to assign the ranks and weights for overlay process in Geomedia environment. The consequent higher index values indicate the sensitivity zone influencing recharge to the aquifer which should be demarcated as groundwater protection zones. This groundwater protection zone will be designated as pollution free zone for better management of the aquife. (C) 2011 International Association of Hydro-environment Engineering and Research, Asia Pacific Division. Published by Elsevier B.V. All rights reserved.

关键词： Groundwater Textile effluent Demarcation of protection zone visual modflow

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Effects of Baekje Weir Operation on the Stream-Aquifer Interaction in the Geum River Basin, South Korea

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WATER 2020年第11期12卷 2984-2984页

作者： Lee, Hyeonju Koo, Min-Ho Cho, Byong Wook Oh, Yong Hwa Kim, Yongje Cho, Soo Young Lee, Jung-Yun Kim, Yongcheol Kim, Dong-Hun Korea Inst Geosci & Mineral Resources Groundwater Res Ctr Geol Environm Div Daejeon 34132 South Korea Kongju Natl Univ Dept Geoenvironm Sci Kong Ju 32588 South Korea

Hydraulic structures have a significant impact on riverine environment, leading to changes in stream-aquifer interactions. In South Korea, 16 weirs were constructed in four major rivers, in 2012, to secure sufficient water resources, and some weirs operated periodically for natural ecosystem recovery from 2017. The changed groundwater flow system due to weir operation affected the groundwater level and quality, which also affected groundwater use. In this study, we analyzed the changes in the groundwater flow system near the Geum River during the Baekje weir operation using visual modflow Classic. Groundwater data from 34 observational wells were evaluated to analyze the impact of weir operation on stream-aquifer interactions. Accordingly, the groundwater discharge rates increased from 0.23 to 0.45 cm/day following the decrease in river levels owing to weir opening, while the hydrological condition changed from gaining to losing streams following weir closure. The variation in groundwater flow affected the groundwater quality during weir operation, changing the groundwater temperature and electrical conductivity (EC). Our results suggest that stream-aquifer interactions are significantly affected by weir operation, consequently, these repeated phenomena could influence the groundwater quality and groundwater use.

关键词： Baekje weir weir operation stream– aquifer interaction visual modflow

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