Sand Tank Groundwater Model
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A GIS-Based Software to Simulate Groundwater Nitrate Load from Septic Systems to Surface Water Bodies
Computers & Geosciences 52 (2013) 108–116 Contents lists available at SciVerse ScienceDirect Computers & Geosciences journal homepage: www.elsevier.com/locate/cageo ArcNLET: A GIS-based software to simulate groundwater nitrate load from septic systems to surface water bodies J. Fernando Rios a, Ming Ye b,n, Liying Wang b, Paul Z. Lee c, Hal Davis d, Rick Hicks c a Department of Geography, State University of New York at Buffalo, Buffalo, NY, USA b Department of Scientific Computing, Florida State University, Tallahassee, FL, USA c Florida Department of Environmental Protection, Tallahassee, FL, USA d 2625 Vergie Court, Tallahassee, FL 32303, USA article info abstract Article history: Onsite wastewater treatment systems (OWTS), or septic systems, can be a significant source of nitrates Received 17 June 2012 in groundwater and surface water. The adverse effects that nitrates have on human and environmental Received in revised form health have given rise to the need to estimate the actual or potential level of nitrate contamination. 4 October 2012 With the goal of reducing data collection and preparation costs, and decreasing the time required to Accepted 5 October 2012 produce an estimate compared to complex nitrate modeling tools, we developed the ArcGIS-based Available online 16 October 2012 Nitrate Load Estimation Toolkit (ArcNLET) software. Leveraging the power of geographic information Keywords: systems (GIS), ArcNLET is an easy-to-use software capable of simulating nitrate transport in ground- Nitrate transport water and estimating long-term nitrate loads from groundwater to surface water bodies. Data Screening model requirements are reduced by using simplified models of groundwater flow and nitrate transport which Denitrification consider nitrate attenuation mechanisms (subsurface dispersion and denitrification) as well as spatial Septic system Nitrogen variability in the hydraulic parameters and septic tank distribution. -
Climate Models and Their Evaluation
8 Climate Models and Their Evaluation Coordinating Lead Authors: David A. Randall (USA), Richard A. Wood (UK) Lead Authors: Sandrine Bony (France), Robert Colman (Australia), Thierry Fichefet (Belgium), John Fyfe (Canada), Vladimir Kattsov (Russian Federation), Andrew Pitman (Australia), Jagadish Shukla (USA), Jayaraman Srinivasan (India), Ronald J. Stouffer (USA), Akimasa Sumi (Japan), Karl E. Taylor (USA) Contributing Authors: K. AchutaRao (USA), R. Allan (UK), A. Berger (Belgium), H. Blatter (Switzerland), C. Bonfi ls (USA, France), A. Boone (France, USA), C. Bretherton (USA), A. Broccoli (USA), V. Brovkin (Germany, Russian Federation), W. Cai (Australia), M. Claussen (Germany), P. Dirmeyer (USA), C. Doutriaux (USA, France), H. Drange (Norway), J.-L. Dufresne (France), S. Emori (Japan), P. Forster (UK), A. Frei (USA), A. Ganopolski (Germany), P. Gent (USA), P. Gleckler (USA), H. Goosse (Belgium), R. Graham (UK), J.M. Gregory (UK), R. Gudgel (USA), A. Hall (USA), S. Hallegatte (USA, France), H. Hasumi (Japan), A. Henderson-Sellers (Switzerland), H. Hendon (Australia), K. Hodges (UK), M. Holland (USA), A.A.M. Holtslag (Netherlands), E. Hunke (USA), P. Huybrechts (Belgium), W. Ingram (UK), F. Joos (Switzerland), B. Kirtman (USA), S. Klein (USA), R. Koster (USA), P. Kushner (Canada), J. Lanzante (USA), M. Latif (Germany), N.-C. Lau (USA), M. Meinshausen (Germany), A. Monahan (Canada), J.M. Murphy (UK), T. Osborn (UK), T. Pavlova (Russian Federationi), V. Petoukhov (Germany), T. Phillips (USA), S. Power (Australia), S. Rahmstorf (Germany), S.C.B. Raper (UK), H. Renssen (Netherlands), D. Rind (USA), M. Roberts (UK), A. Rosati (USA), C. Schär (Switzerland), A. Schmittner (USA, Germany), J. Scinocca (Canada), D. Seidov (USA), A.G. -
Porosity and Permeability Lab
Mrs. Keadle JH Science Porosity and Permeability Lab The terms porosity and permeability are related. porosity – the amount of empty space in a rock or other earth substance; this empty space is known as pore space. Porosity is how much water a substance can hold. Porosity is usually stated as a percentage of the material’s total volume. permeability – is how well water flows through rock or other earth substance. Factors that affect permeability are how large the pores in the substance are and how well the particles fit together. Water flows between the spaces in the material. If the spaces are close together such as in clay based soils, the water will tend to cling to the material and not pass through it easily or quickly. If the spaces are large, such as in the gravel, the water passes through quickly. There are two other terms that are used with water: percolation and infiltration. percolation – the downward movement of water from the land surface into soil or porous rock. infiltration – when the water enters the soil surface after falling from the atmosphere. In this lab, we will test the permeability and porosity of sand, gravel, and soil. Hypothesis Which material do you think will have the highest permeability (fastest time)? ______________ Which material do you think will have the lowest permeability (slowest time)? _____________ Which material do you think will have the highest porosity (largest spaces)? _______________ Which material do you think will have the lowest porosity (smallest spaces)? _______________ 1 Porosity and Permeability Lab Mrs. Keadle JH Science Materials 2 large cups (one with hole in bottom) water marker pea gravel timer yard soil (not potting soil) calculator sand spoon or scraper Procedure for measuring porosity 1. -
Hydrogeology of Flowing Artesian Wells in Northwest Ohio
Hydrogeology of Flowing Artesian Wells in Northwest Ohio By Curtis J Coe, CPG and Jim Raab Ohio Department of Natural Resources Division of Water Resources June 2016 Bulletin 48 Table of Contents 1.0 Introduction ........................................................................................................................... 1 1.1 Site Location and Setting .................................................................................................. 1 1.2 ODH Water Well Regulations for Flowing Artesian Wells ............................................. 3 1.3 Purpose and Scope of Work .............................................................................................. 3 2.0 Previous Work ....................................................................................................................... 4 2.1 Bedrock Hydrogeology ..................................................................................................... 4 2.2 Glacial Hydrogeolgy ......................................................................................................... 8 2.2.1 Williams Complex Aquifer ....................................................................................... 8 2.2.2 Williams End Moraine Aquifer ................................................................................. 8 2.2.3 Buried Valley Aquifers ............................................................................................ 13 2.2.4 Lake Maumee Lacustrine Aquifer .......................................................................... -
Do You Drink It? 9-12
DO YOU DRINK IT? 9-12 SUBJECTS: Science (Physical Science, Ecology, Earth Science), Social Studies (Geography) TIME: 2 class periods MATERIALS: 3-liter soda bottles aquarium gravel sand (coarse) pump from liquid dispenser blue, yellow & Red food coloring paper cups straws student sheets droppers scissors or razor blades markers OBJECTIVES The student will do the following: 1. Create an aquifer model. 2. Locate major U.S. aquifers. 3. Explain how a well works. 4. Examine a well’s relationship to the water table. 5. Apply principles of well placement. 6. Explain different ways that groundwater is contaminated. 4-37 BACKGROUND INFORMATION An aquifer is an underground layer of rock or soil that holds the water called groundwater. The word “aquifer” is derived from the Latin “aqua” meaning “water ,”and “ferre” meaning “to bring” or “to yield.” The ability of a geological formation to yield water depends on two factors - porosity and permeability. Porosity is determined by how much water the soil or rock can hold in the spaces between its particles. Permeability means how interconnected the spaces are so that water can flow freely between them. There are two types of aquifers. One is a confined aquifer, in which a water supply is sandwiched between two impermeable layers. These are sometimes called artesian aquifers because, when a well is drilled into this layer, the pressure may be so great that water will spurt to the surface without being pumped. This is an artesian well. The other type of aquifer is the unconfined aquifer, which has an impermeable layer under it but not above it. -
Water Levels in Major Artesian Aquifers of the New Jersey Coastal Plain, 1988
WATER LEVELS IN MAJOR ARTESIAN AQUIFERS OF THE NEW JERSEY COASTAL PLAIN, 1988 By Robert Rosman, Pierre J. Lacombe, and Donald A. Storck U.S. GEOLOGICAL SURVEY Water-Resources Investigations Report 95-4060 Prepared in cooperation with the NEW JERSEY DEPARTMENT OF ENVIRONMENTAL PROTECTION West Trenton, New Jersey 1995 CONTENTS Page Abstract............................................................. 1 Introduction......................................................... 2 Purpose and scope............................................... 2 Study area...................................................... 2 Previous investigations......................................... 4 Well-numbering system........................................... 4 Methods of data collection...................................... 5 Description of data presented................................... 6 Acknowledgments................................................. 8 Hydrogeology of the Coastal Plain.................................... 8 Description of aquifers and confining units..................... 11 Location of freshwater/saltwater interface...................... 12 Water levels in artesian aquifers of the Coastal Plain............... 13 Cohansey aquifer in Cape May County............................. 13 Water levels............................................... 13 Water-level fluctuations................................... 13 Atlantic City 800-foot sand..................................... 14 Water levels............................................... 14 Water-level -
Causes of Groundwater Depletion
Number 63 Issue Paper February 2019 Aquifer Depletion and Potential Impacts on Long-term Irrigated Agricultural Productivity When developing policies that regulate groundwater systems that are being depleted, the potential consequences of groundwater depletion need to be fully assessed to determine the trade-offs that exist between the undesired impacts of groundwater depletion and whether these impacts outweigh the benefits associated with groundwater use. (Photo from Ed Hennigan/Shutterstock.) is even higher in arid and semi-arid ar- the Mississippi Embayment Aquifer ABSTRACT eas, where the only consistent source of (Mississippi River lowlands bordering Groundwater is the Earth’s most irrigation water is groundwater. In these Arkansas and Mississippi), aquifers in extracted raw material, with almost regions, however, the use of groundwa- southern Arizona, and smaller aquifers 1,000 cubic kilometers per year (800 ter typically far exceeds the rate at which in many western states. million acre-feet per year) of ground- it is naturally replenished, indicating The groundwater resource with the water pumped from aquifers around the that these critical groundwater resources greatest long-term depletion is the High world. Approximately 70% of ground- are being slowly depleted. Within the Plains (Ogallala) aquifer in the Great water withdrawals worldwide are used to United States, groundwater depletion has Plains Region of the United States, support agricultural production systems, occurred in many important agricultural where groundwater levels have declined and within the United States, about 71% production regions, including the Great by more than 50 meters (150 feet) of groundwater withdrawals are used for Plains Region (Nebraska, Colorado, in some areas. -
Flowing Artesian Wells
Flowing Artesian Wells Water Stewardship Information Series Table of Contents What’s the difference between a flowing artesian well Are there specific actions to avoid when flowing artesian and an artesian well? . 1 conditions are present? . 6 Why do wells flow? . 1 How can flowing artesian well be constructed in bedrock aquifers? . 7 Why is stopping or controlling artesian flow important? . 2 How can flowing artesian well be constructed in How can flowing artesian conditions be determined unconsolidated aquifers? . 7 before drilling? . 2 What should be done if flowing artesian conditions are What are the provincial regulatory requirements for suddenly encountered? . 7 controlling or stopping artesian flow? . 2 What are the key factors in completing and equipping What does it mean to “control” artesian flow from a well? . 3 a flowing artesian well? . 8 Will a flowing artesian well dry up if the flow is stopped How is the pressure or static water level for a flowing or controlled? . 3 artesian well measured? . 8 Are there any water quality concerns with flowing How should flowing artesian wells be closed? . 8 artesian wells? . 3 How is a flowing artesian well disinfected? . 9 Are there any other concerns with flowing artesian wells? . 3 Further Information . 9 What can be done with an existing flowing well? . 4 What if the flow is needed, for example, to increase the baseflow of a creek or stream? . 4 Are there some general guidelines for constructing a flowing artesian well? . 4 What are the key issues to be aware of when drilling a flowing artesian well? . 5 This booklet contains general information on flowing artesian wells for well drillers, groundwater consultants and well owners Hydrostatic head (or confining pressure) is the vertical in British Columbia . -
Integrated Surface-Subsurface Water Flow Modelling of the Laxemar Area Application of the Hydrological Model ECOFLOW
R-07-07 Integrated surface-subsurface water flow modelling of the Laxemar area Application of the hydrological model ECOFLOW Nikolay Sokrut, Kent Werner, Johan Holmén Golder Associates AB January 2007 Svensk Kärnbränslehantering AB Swedish Nuclear Fuel and Waste Management Co Box 5864 SE-102 40 Stockholm Sweden Tel 08-459 84 00 +46 8 459 84 00 Fax 08-661 57 19 +46 8 661 57 19 CM Gruppen AB, Bromma, 2007 ISSN 1402-3091 Tänd ett lager: SKB Rapport R-07-07 P, R eller TR. Integrated surface-subsurface water flow modelling of the Laxemar area Application of the hydrological model ECOFLOW Nikolay Sokrut, Kent Werner, Johan Holmén Golder Associates AB January 2007 This report concerns a study which was conducted for SKB. The conclusions and viewpoints presented in the report are those of the authors and do not necessarily coincide with those of the client. A pdf version of this document can be downloaded from www.skb.se Abstract Since 2002, the Swedish Nuclear Fuel and Waste Management Co (SKB) performs site investigations in the Simpevarp area, for the siting of a deep geological repository for spent nuclear fuel. The site descriptive modelling includes conceptual and quantitative modelling of surface-subsurface water interactions, which are key inputs to safety assessment and environmental impact assessment. Such modelling is important also for planning of continued site investigations. In this report, the distributed hydrological model ECOFLOW is applied to the Laxemar subarea to test the ability of the model to simulate surface water and near-surface groundwater flow, and to illustrate ECOFLOW’s advantages and drawbacks. -
Groundwater Modeling of the Withdrawal
DOI: 10.7343/as-2018-333 Paper Groundwater modeling of the withdrawal sustainability of Cannara artesian aquifer (Umbria, Italy) Modellazione delle acque sotterranee e prelievo sostenibile dall’acquifero artesiano di Cannara (Umbria) Giovanni Pietro Beretta, Monica Avanzini, Tomaso Marangoni, Marino Burini, Giacomo Schirò, Jacopo Terrenghi, Gaetano Vacca Riassunto: L’acquifero di Cannara (Umbria, Italia) è noto da oltre un Abstract: The Cannara aquifer (Umbria, Italy) has been known for more secolo ed è uno dei principali punti di approvvigionamento di acqua than a century, and is one of the main drinking water supplies in the Umbria potabile nella Regione Umbria. All’inizio veniva utilizzato per scopi Region. In the beginning it was used for irrigation purposes, since this area was irrigui, poiché quest’area era prevalentemente agricola fino agli anni mainly agricultural up to the 1960s. The groundwater—exploited by Umbra ‘60. Le acque sotterranee, sfruttate da Umbra Acque S.p.A. (Società che Acque S.p.A. (a Company supplying drinking water)—is 150 m under ground fornisce l’acqua potabile), sono a 150 m al di sotto il livello del suolo e level and is contained in a porous confined aquifer, which originally had arte- sono contenute in un acquifero poroso confinato, che in origine aveva sian characteristics. Exploitation of 200–300 l/s with nine wells caused a re- caratteristiche artesiane. Lo sfruttamento di 200-300 l/s con nove pozzi duction of piezometric level, maintaining the confined aquifer conditions, except ha causato una riduzione del livello piezometrico, mantenendo le con- for a very short period during which the aquifer was depressurised by drought, dizioni di acquifero confinato, ad eccezione di un periodo molto breve and for increase of emergency withdrawals replacing other water supplies (from durante il quale la falda è stata depressurizzata in seguito alla siccità e springs) for drinking purposes. -
Groundwater Modeling System Linkage with the Framework for Risk Analysis in Multimedia Environmental Systems
PNNL- 15654 Groundwater Modeling System Linkage with the Framework for Risk Analysis in Multimedia Environmental Systems G. Whelan K.J. Castleton February 2006 Prepared for the U.S. Nuclear Regulatory Commission Office of Nuclear Regulatory Research Division of Systems Analysis & Regulatory Effectiveness Rockville, Maryland 20852 under Contract DE-AC05-76RL01830 DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor Battelle Memorial Institute, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof, or Battelle Memorial Institute. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. PACIFIC NORTHWEST NATIONAL LABORATORY operated by BATTELLE for the UNITED STATES DEPARTMENT OF ENERGY under Contract DE-AC05-76RL01830 Printed in the United States of America Available to DOE and DOE contractors from the Office of Scientific and Technical Information, P.O. Box 62, Oak Ridge, TN 37831-0062; ph: (865) 576-8401 fax: (865) 576-5728 email: [email protected] Available to the public from the National Technical Information Service, U.S. -
Modelling Peatlands As Complex Adaptive Systems
MODELLING PEATLANDS AS COMPLEX ADAPTIVE SYSTEMS Paul John Morris Thesis submitted for the degree of PhD of the University of London, 22nd July 2009. Following examination, minor corrections submitted February 2010. Department of Geography, Queen Mary, University of London, 327 Mile End Road, London E1 4NS United Kingdom. 1 Abstract A new conceptual approach to modelling peatlands, DigiBog, involves a Complex Adaptive Systems consideration of raised bogs. A new computer hydrological model is presented, tested, and its capabilities in simulating hydrological behaviour in a real bog demonstrated. The hydrological model, while effective as a stand-alone modelling tool, provides a conceptual and algorithmic structure for ecohydrological models presented later. Using DigiBog architecture to build a cellular model of peatland patterning dynamics, various rulesets were experimented with to assess their effectiveness in predicting patterns. Contrary to findings by previous authors, the ponding model did not predict patterns under steady hydrological conditions. None of the rulesets presented offered an improvement over the existing nutrient-scarcity model. Sixteen shallow peat cores from a Swedish raised bog were analysed to investigate the relationship between cumulative peat decomposition and hydraulic conductivity, a relationship previously neglected in models of peatland patterning and peat accumulation. A multivariate analysis showed depth to be a stronger control on hydraulic conductivity than cumulative decomposition, reflecting the role of compression in closing pore spaces. The data proved to be largely unsuitable for parameterising models of peatland dynamics, due mainly to problems in core selection. However, the work showed that hydraulic conductivity could be expressed quantitatively as a function of other physical variables such as depth and cumulative decomposition.