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Inverse Three-Dimensional Groundwater Modeling Using The Finite-Difference Method For Recharge Estimation In A Glacial Till Aquitard, V. B. Ella, S. W. Melvin, R. S. Kanwar, L. C. Jones, R. Horton 2017 University of the Philippines Los Baños

Inverse Three-Dimensional Groundwater Modeling Using The Finite-Difference Method For Recharge Estimation In A Glacial Till Aquitard, V. B. Ella, S. W. Melvin, R. S. Kanwar, L. C. Jones, R. Horton

Robert Horton

Knowledge of groundwater recharge rates is essential for developing sustainable groundwater resources management schemes and for assessing the susceptibility of the groundwater system to contamination by leachable nutrients and toxic compounds such as nitrates and pesticides. This study was carried out to develop a method for estimating groundwater recharge in a glacial till aquitard using inverse groundwater modeling based on the USGS modular finite–difference groundwater model. The three–dimensional model incorporated the effects of the various hydrogeologic properties, such as hydraulic conductivity, specific yield, storage coefficient, and porosity, and hydrologic processes influencing recharge such as evapotranspiration and subsurface drainage ...


Challenges And Opportunities In The Hydrologic Sciences, William J. Gutowski Jr., G. M. Hornberger, E. Bernhardt, W. E. Dietrich, D. Entekhabi, G. E. Fogg, E. Foufoula-Georgiou, W. B. Lyons, K. W. Potter, S. W. Tyler, H. J. Vaux, C. J. Vorosmarty, C. Welty, C. A. Woodhouse, C. Zheng 2017 Iowa State University

Challenges And Opportunities In The Hydrologic Sciences, William J. Gutowski Jr., G. M. Hornberger, E. Bernhardt, W. E. Dietrich, D. Entekhabi, G. E. Fogg, E. Foufoula-Georgiou, W. B. Lyons, K. W. Potter, S. W. Tyler, H. J. Vaux, C. J. Vorosmarty, C. Welty, C. A. Woodhouse, C. Zheng

William J. Gutowski, Jr.

No abstract provided.


A Framework For Incorporating The Impact Of Water Quality On Water Supply Stress: An Example From Louisiana, David M. Borrok, Jian Chen, Hisham Eldardiry, Emad Habib 2017 Missouri University of Science and Technology

A Framework For Incorporating The Impact Of Water Quality On Water Supply Stress: An Example From Louisiana, David M. Borrok, Jian Chen, Hisham Eldardiry, Emad Habib

David M. Borrok

Water of poor quality can directly impact the budget of water available for key user groups. Despite this importance, methods for quantifying the impact of water quality on water availability remain elusive. Here, we develop a new framework for incorporating the impact of water quality on water supply by modifying the Water Supply Stress Index (WaSSI). We demonstrate the usefulness of the framework by investigating the impact of high salinity waters on the availability of irrigation water for agriculture in Louisiana. The WaSSI was deconstructed into sectoral components such that the total available water supply could be reduced for a ...


Assessing The Periodic Groundwater Flow Conditions Of A Perched Aquifer System In The Daniel Boone National Forest, Ethan Sweet 2017 Murray State University

Assessing The Periodic Groundwater Flow Conditions Of A Perched Aquifer System In The Daniel Boone National Forest, Ethan Sweet

Posters-at-the-Capitol

Assessing the Periodic Groundwater Flow Conditions of a Perched Aquifer System in the Daniel Boone National Forest

Ethan Sweet and Jonathan Malzone

Eastern Kentucky University, Department of Geosciences

Natural ephemeral wetlands situated among the ridge-tops in the Daniel Boone National Forest serve as reservoirs that recharge a shallow groundwater system. Unique interactions between surface and groundwater in these isolated systems provide substantial support for the native ecosystem, serving as a breeding ground for amphibians and as source water for vegetation—especially in periods of drought. Currently it is not understood how groundwater could provide regional biodiversity, a drought buffer, or ...


A Study Of Marine Terrace Formation Along The California Central Coast, Mary C. Devlin 2017 California Polytechnic State University, San Luis Obispo

A Study Of Marine Terrace Formation Along The California Central Coast, Mary C. Devlin

Natural Resources Management and Environmental Sciences

Marine terrace formation is in many instances attributed to wave action, and shore platforms are often called “wave-cut”. However, alternative models for marine terrace formation suggest that other types of physical and chemical weathering have a more central role in the formation of marine terraces than is widely acknowledged. Roering and Retallack (2012) concluded that the roles of subaerial physical and chemical weathering are significant, and played a major role in the formation of the terraces. In this study, weathering of beach cliffs and shore platforms associated with marine terraces at eight sites in two different locations along the central ...


Assessing Morphodynamics Of The Lower Mississippi River From 1985 To 2015 With Remote Sensing And Gis Techniques, Bo Wang 2017 Louisiana State University and Agricultural and Mechanical College

Assessing Morphodynamics Of The Lower Mississippi River From 1985 To 2015 With Remote Sensing And Gis Techniques, Bo Wang

LSU Doctoral Dissertations

The Lower Mississippi River is one of the most highly engineered rivers in the world. The river is now completely regulated by a combination of levees, artificial cutoffs, bank revetments, and dike fields; however, the river engineering has also complicated the geomorphological response to the sediment brought in the river. This dissertation research examined morphodynamics of the middle portion of the Lower Mississippi River from Vicksburg, Mississippi (river kilometer: 737) to Red River Landing, Louisiana (river kilometer: 486) to elucidate river engineering effects on sediment transport, storage, and distribution. The Old River Control Structure (ORCS) diverts approximately 25% of the ...


Econometric Estimation Of Groundwater Depth Change For The High Plains Aquifer, Jonathan R. Sims 2017 University of Nebraska-Lincoln

Econometric Estimation Of Groundwater Depth Change For The High Plains Aquifer, Jonathan R. Sims

Dissertations and Theses in Agricultural Economics

This article presents a new method for estimating changes in depth to groundwater at a yearly, county level and incorporates these estimates as the dependent variable of econometric models for the High Plains aquifer. The High Plains (Ogallala) aquifer underlies eight states in the central United States and is the primary source of irrigation water for this large food producing region. The stock of groundwater is a finite, non-renewable resource with minimal recharge in most areas. Many fields of study, including hydrology and agricultural economics, are interested in depth to groundwater changes because they serve as a proxy for estimating ...


Longitudinal Thermal And Solute Dynamics In Regulated Rivers, Muhammad Rezaul Haider 2017 Utah State University

Longitudinal Thermal And Solute Dynamics In Regulated Rivers, Muhammad Rezaul Haider

All Graduate Theses and Dissertations

Dam releases increase river stage and can reverse groundwater movement into and out of the river. As the flood, thermal, and solute waves travel downstream in a regulated river, the size of the waves is anticipated to be affected both by river processes and exchanges with near river groundwater. This study established a modeling framework to quantify the influences of the groundwater exchanges on the temperatures and solute concentration dynamics along regulated rivers. The wave properties, volume of exchanges, conservative solute mass exchanges, and heat energy exchanges were calculated as a function of time and distance downstream. Results show that ...


A Framework For Incorporating The Impact Of Water Quality On Water Supply Stress: An Example From Louisiana, David M. Borrok, Jian Chen, Hisham Eldardiry, Emad Habib 2017 Missouri University of Science and Technology

A Framework For Incorporating The Impact Of Water Quality On Water Supply Stress: An Example From Louisiana, David M. Borrok, Jian Chen, Hisham Eldardiry, Emad Habib

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

Water of poor quality can directly impact the budget of water available for key user groups. Despite this importance, methods for quantifying the impact of water quality on water availability remain elusive. Here, we develop a new framework for incorporating the impact of water quality on water supply by modifying the Water Supply Stress Index (WaSSI). We demonstrate the usefulness of the framework by investigating the impact of high salinity waters on the availability of irrigation water for agriculture in Louisiana. The WaSSI was deconstructed into sectoral components such that the total available water supply could be reduced for a ...


Best Management Practices: A Community-Based Approach To Construction And Installation, Nathanael J. La Breche 2017 Purdue University

Best Management Practices: A Community-Based Approach To Construction And Installation, Nathanael J. La Breche

Purdue Journal of Service-Learning and International Engagement

The Wabash River Enhancement Corporation (WREC) is a nonprofit organization dedicated to improving both the health of the Wabash River and the surrounding terrestrial areas. In an effort to improve water quality, their urban cost-share program focuses on supporting green projects within a critical region surrounding the Great Bend of the Wabash River. In this essay, a Purdue student describes his experience as leader of a six-member group who worked with WREC to locate a suitable site within this critical area and implement a green project. They selected the Lighthouse Baptist Church, located in Lafayette, Indiana, since it was experiencing ...


Long Simulation Of Regional Climate As A Sequence Of Short Segments, Zaitao Pan, Eugene S. Takle, William J. Gutowski Jr., Richard Turner 2017 Iowa State University

Long Simulation Of Regional Climate As A Sequence Of Short Segments, Zaitao Pan, Eugene S. Takle, William J. Gutowski Jr., Richard Turner

William J. Gutowski, Jr.

Regional climate simulations are long time integrations over an open system where the atmosphere over part of the model domain (boundary zones) is updated periodically. Model reinitialization after a long period of integration can allow several segments of a long simulation to be run in parallel and also minimize possible drift caused by accumulated model errors. However, the spinup problems introduced by each additional restart must be addressed. The necessity and feasibility of subdividing long integrations is investigated by means of a series of experiments in which the authors examine the effects of reinitialization frequency and the relative importance of ...


Use Of Regional Climate Model Output For Hydrologic Simulations, Lauren E. Hay, Martyn P. Clark, Robert L. Wilby, William J. Gutowski Jr., George H. Leavesley, Zaitao Pan, Raymond W. Arritt, Eugene S. Takle 2017 United States Geological Survey

Use Of Regional Climate Model Output For Hydrologic Simulations, Lauren E. Hay, Martyn P. Clark, Robert L. Wilby, William J. Gutowski Jr., George H. Leavesley, Zaitao Pan, Raymond W. Arritt, Eugene S. Takle

William J. Gutowski, Jr.

Daily precipitation and maximum and minimum temperature time series from a regional climate model (RegCM2) configured using the continental United States as a domain and run on a 52-km (approximately) spatial resolution were used as input to a distributed hydrologic model for one rainfall-dominated basin (Alapaha River at Statenville, Georgia) and three snowmelt-dominated basins (Animas River at Durango, Colorado; east fork of the Carson River near Gardnerville, Nevada; and Cle Elum River near Roslyn, Washington). For comparison purposes, spatially averaged daily datasets of precipitation and maximum and minimum temperature were developed from measured data for each basin. These datasets included ...


Project To Intercompare Regional Climate Simulations (Pircs): Description And Initial Results, Eugene S. Takle, William J. Gutowski Jr., Raymond W. Arritt, Zaitao Pan, Christoper J. Anderson, Renato Ramos da Silva, Daniel Caya, Shyh-Chin Chen, F. Giorgi, Jens Hesselbjerg Christensen, Song-You Hong, Hann-Ming Henry Juang, Jack Katzfey, William M. Lapenta, Rene Laprise, Glen E. Liston, Philippe Lopez, John McGregor, Roger A. Pielke Sr., John O. Roads 2017 Iowa State University

Project To Intercompare Regional Climate Simulations (Pircs): Description And Initial Results, Eugene S. Takle, William J. Gutowski Jr., Raymond W. Arritt, Zaitao Pan, Christoper J. Anderson, Renato Ramos Da Silva, Daniel Caya, Shyh-Chin Chen, F. Giorgi, Jens Hesselbjerg Christensen, Song-You Hong, Hann-Ming Henry Juang, Jack Katzfey, William M. Lapenta, Rene Laprise, Glen E. Liston, Philippe Lopez, John Mcgregor, Roger A. Pielke Sr., John O. Roads

William J. Gutowski, Jr.

The first simulation experiment and output archives of the Project to Intercompare Regional Climate Simulations (PIRCS) is described. Initial results from simulations of the summer 1988 drought over the central United States indicate that limited-area models forced by large-scale information at the lateral boundaries reproduce bulk temporal and spatial characteristics of meteorological fields. In particular, the 500 hPa height field time average and temporal variability are generally well simulated by all participating models. Model simulations of precipitation episodes vary depending on the scale of the dynamical forcing. Organized synoptic-scale precipitation systems are simulated deterministically in that precipitation occurs at close ...


Do Advisors Perceive Climate Change As An Agricultural Risk? An In-Depth Examination Of Midwestern U.S. Ag Advisors’ Views On Drought, Climate Change, And Risk Management, Sarah P. Church, Michael Dunn, Nicholas Babin, Amber Saylor Mase, Tonya Haigh, Linda Stalker Prokopy 2017 Purdue University

Do Advisors Perceive Climate Change As An Agricultural Risk? An In-Depth Examination Of Midwestern U.S. Ag Advisors’ Views On Drought, Climate Change, And Risk Management, Sarah P. Church, Michael Dunn, Nicholas Babin, Amber Saylor Mase, Tonya Haigh, Linda Stalker Prokopy

Drought Mitigation Center Faculty Publications

Through the lens of the Health Belief Model and Protection Motivation Theory, we analyzed interviews of 36 agricultural advisors in Indiana and Nebraska to understand their appraisals of climate change risk, related decision making processes and subsequent risk management advice to producers. Most advisors interviewed accept that weather events are a risk for US Midwestern agriculture; however, they are more concerned about tangible threats such as crop prices. There is not much concern about climate change among agricultural advisors. Management practices that could help producers adapt to climate change were more likely to be recommended by conservation and Extension advisors ...


Veress M., 2016. Covered Karsts, Reza Khoshraftar 2017 University of Zanjan

Veress M., 2016. Covered Karsts, Reza Khoshraftar

International Journal of Speleology

No abstract provided.


Holdrege: Nebraska's State Soil, University of Nebraska - Lincoln 2017 University of Nebraska - Lincoln

Holdrege: Nebraska's State Soil, University Of Nebraska - Lincoln

Conservation and Survey Division

No abstract provided.


Holdrege Nebraska State Soil, Nebraska Society of Professional Soil Scientists 2017 Nebraska Society of Professional Soil Scientists

Holdrege Nebraska State Soil, Nebraska Society Of Professional Soil Scientists

Conservation and Survey Division

No abstract provided.


Groundwater Levels In Nebraska 1984, Michael J. Ellis, Darryll T. Pederson 2017 U.S. Geological Survey

Groundwater Levels In Nebraska 1984, Michael J. Ellis, Darryll T. Pederson

Conservation and Survey Division

No abstract provided.


Sulfur-Based Speleogenesis In The Cumberland Plateau, Usa, Lee J. Florea 2017 Ball State University

Sulfur-Based Speleogenesis In The Cumberland Plateau, Usa, Lee J. Florea

Lee J Florea, PhD, P.G.

No abstract provided.


Improving The Accuracy For The Long-Term Hydrologic Impact Assessment (L-Thia) Model, Anqi Zhang, Lawrence Theller, Bernard A. Engel 2017 Purdue University

Improving The Accuracy For The Long-Term Hydrologic Impact Assessment (L-Thia) Model, Anqi Zhang, Lawrence Theller, Bernard A. Engel

The Summer Undergraduate Research Fellowship (SURF) Symposium

Urbanization increases runoff by changing land use types from less impervious to impervious covers. Improving the accuracy of a runoff assessment model, the Long-Term Hydrologic Impact Assessment (L-THIA) Model, can help us to better evaluate the potential uses of Low Impact Development (LID) practices aimed at reducing runoff, as well as to identify appropriate runoff and water quality mitigation methods. Several versions of the model have been built over time, and inconsistencies have been introduced between the models. To improve the accuracy and consistency of the model, the equations and parameters (primarily curve numbers in the case of this model ...


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