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ORAL PRESENTATIONS – TUESDAY, JULY 10
(The Presenter is in BOLD type immediately following the paper title. Co-authors are listed in parentheses.)

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Tuesday / July 10 / 8:30 AM – 10:00 AM
Concurrent Sessions 7, 8

SESSION 7:  Panel - Depleting Aquifers and Transition from Irrigated Agriculture to Sustainable Agriculturally Related Ecosystems
Moderator:  Robert DeOtte,
 Professor of Civil & Environmental Engineering, West Texas A&M University, Canyon, TX and Ron Lacewell, Assistant Vice Chancellor of Agriculture and Life Science for Governmental Affairs, Texas A&M University, College Station, TX

Panelists:
“Modeling for Potential Future Outcomes”
Thomas Gerick, Professor and Center Director Texas A&M AgriLife Blackland Research and Extension Center, Temple, TX
“Unintended Consequences of Improved Water Use and Agronomic Efficiency. Irregular thoughts of Transboundary Water Transfers”
Brent Auvermann, Professor and Center Director Texas A&M AgriLife Research and Extension Center – Amarillo, TX 
“Groundwater Policy and Management for Oklahoma, Kansas, and Texas and Gaps Needing Resources. Overview of Current Major Research Projects”
Daniel Devlin, Director of the Kansas Center for Agriclutural Resources and the Environment and the Kansas Water Resources Institute, Manhattan, KS, and 
Kevin Wagner, Director Oklahoma Water Resources Center and Thomas E. Berry Professorship in Integrated Water Resources Management, Stillwater, OK
“Impact on the Economy of Changes in Water Use and Transboundary Transfers”
Bill Goldern, Research Assistant Professor, Kansas State University Department of Agricultural Economics, Meridian, TX

A hallmark of agriculture in the twentieth century, continuing through to today, has been the increased production credited to improved genetics, management practices, and the perceived abundance of water for irrigation however, those water resources have been sorely taxed and today many, such as the Ogallala Aquifer of the High Plains and aquifers in California, have been markedly depleted, while in others, such as the highly populated coastal region used for Citrus farming in Florida, water quality is in serious decline. Efforts have been ongoing to develop new genetic lines that require less water thereby extending the life of water supplies. Other initiatives have included removal of irrigation and return to dryland agriculture. The problem is more complex than engineering to provide adequate water through mining or water treatment, or agronomics to develop new and better crops. There are economic issues that drive decisions as to how to remain profitable while seeing declines in water quantity as well as social issues related to adopting new models for sustainable agricultural production. At best, current approaches merely delay the inevitable depletion of a nonrenewable resource. The limited efforts thus far have been to address the transition of land committed to irrigated agriculture to either dryland crops or grazing systems. Some evidence indicates that not all irrigated cropland can be readily returned to the native grasslands or dryland agriculture. There needs to be an orderly optimizing transition while there is still adequate water to establish positive alternative land uses such as quality dryland grazing systems or other economically and ecologically sustainable systems.  Historical considerations have included transboundary reallocation of surface waters to supplement or replace groundwater. Indeed, Kansas is working through issues of transferring water from the Missouri River. The cattle feeding industries of Colorado, Kansas, and Texas import water from the Midwest in the form of grain via unit trains. Without effective planning, no matter how much water is imported by whatever conveyance, none of that will prevent the Great American Desert from returning to “dust bowl” conditions as the new status quo. The transition will impact producers and the rural communities that are dependent upon them and have cascade impacts throughout the entire food and fiber supply chain. This discussion will focus on potential opportunities and challenges including economics, transboundary groundwater management, policy, and ecological sustainability.

SESSION 8:  Transboundary Groundwater Science 
Moderator:  Jeff Pepin,
U.S. Geological Survey, Los Lunas, NM

  1. Geophysics-Based Assessment of Groundwater Salinity in the Mesilla Basin/Conejos Médanos and Hueco Bolson Aquifer Systems in Doña Ana County, New Mexico, and El Paso County, Texas - Andrew Teeple, U.S. Geological Survey, Austin, TX
  2. Assessment and Characterization of Hybrid Mesoporous Material with Performance of Infiltration Basins in El Paso, TX – Jiajun Xu, University of the District of Columbia, Washington, D.C. (co-authors:  M. Kamen, T. Deksissa)
  3. Geochemical and Isotopic Determination of Deep Groundwater Contributions and Salinity to the Shallow Groundwater and Surface Water Systems, Mesilla Basin, New Mexico, Texas, and Mexico - Andrew Robertson, U.S. Geological Survey - New Mexico, Albuquerque, NM  (co-authors:  K. Carroll, C. Kubicki, R. Purtschert)
  4. Using Heat as a Tracer to Estimate Deep Saline Groundwater Inputs to the Rio Grande in the Mesilla Basin, New Mexico, USA - Jeff Pepin, U.S. Geological Survey, Albuquerque, NM (co-authors:  A. Robertson, S. Kelley, E. Burns)

Tuesday / July 10 / 10:30 AM – 12:00 Noon
Concurrent Sessions 9, 10

SESSION 9:  Panel – Understanding Texas’ Approach to Groundwater Governance and Management
Moderator:  John C. Tracy,
Texas Water Resources Institute, College Station, TX

Panel:  Understanding Texas’ Approach to Groundwater Governance and Management: A Panel Discussion - John C. Tracy, Texas Water Resources Institute, College Station, TX (co-authors:  S. Schlessinger, C. Betz, L. French)

Panelists:
Sarah Schlessinger, Executive Director, Texas Alliance of Groundwater Districts
Cary Betz, Manager, Permit Support, Compliance and Groundwater, Texas Commission on Environmental Quality
Larry French, Director, Groundwater Division, Texas Water Development Board

Within the United States, Texas is fairly unique in the manner in which it approaches the Governance and Management of its groundwater resources.  In its simplest form, groundwater in Texas is subject to the 1904 Rule of Capture, which recognizes groundwater as a privately owned landowner right. Beyond Rule of Capture, however, Texas has developed additional decentralized management frameworks to balance private property rights, management of the resource, and the social, economic and ecologic systems across the state.  This panel will discuss the history of the development of the groundwater governance frameworks currently used within Texas; the range of management structures that have been developed within these frameworks; the perceived advantages and disadvantages of Texas’ approach to groundwater governance; and the current issues and directions that groundwater governance and management could head in the future.  

SESSION 10:  Global North and Global South 
Moderator:  Alfonso Rivera,
Geologic Survey of Canada, Quebec, Quebec, Canada

  1. Transboundary Groundwater Issues Within Canada and Between Canada – US - Alfonso Rivera, Geological Survey of Canada, Québec, Quebec, Canada 
  2. Proposal for the Implementation of the GUARANI Aquifer Agreement - Mauri Cesar Pereira, AGUASSEMFRONTEIRAS, Curitiba, Parana State, Brazil (co-author:  Silva, D.)
  3. Risk Perception and Trust in International Groundwater Sharing: a Texas-Mexico Case Study - Lindsay Sansom, Texas A&M University, Bryan, TX
  4. Towards a technical and legal framework for the sustainability of the transboundary aquifers between Mexico and Belize, Guatemala, and the U.S - Mario Lopez, IMTA, Progreso, Jiutepec, Morelos, MX  (co-authors):  F. Arreguin-Cortes, R. Galvan-Benitez)

Tuesday / July 10 / 1:30 PM – 3:00 PM
Concurrent Sessions 11, 12

SESSION 11:  Texas Groundwater – Intrastate and Interstate
Moderator:  Zhuping Sheng,
Texas A&M AgriLife Research, El Paso, TX

  1. Transboundary Aquifers: A Summary of Aquifers and Their Characteristics - Larry French, Texas Water Development Board, Austin, TX  (co-authors:  R. Bradley, R. Boghici)
  2. Who Owns the Groundwater?  Well, that Depends…. - Ken Rainwater, Texas Tech University, Lubbock, TX (co-authors:  P. Giany, S. Joshi, G. Eckstein)
  3. Findings from the Ogallala Water Summit: Opportunities to Enhance the Understanding and Management of an Intra-State Groundwater Resource - Amy Kremen, Colorado State University, Fort Collins, CO  (co-authors:  M. Schipanski, J. Tracy, R. Waskom)
  4. Transboundary Groundwater Governance in the Borderland between Mexico and Texas - Rosario Sanchez, TWRI, College Station, TX

SESSION 12:  Modeling, Irrigation and More!
Moderator:  Joshua Joseph,
Southern University, Baton Rouge, LA

  1. Allende – Piedras Negras Transboundary Aquifer: an Initial Modeling Assessment - Laura Rodriguez, Texas A&M University, Houston, TX (co-authors:  R. Sanchez. H. Zhan)
  2. Hydrochemical Connectivity of the Allende-Piedras Negras Transboundary Aquifer - Oindrila Ghosh, TWRI, College Station, TX (co-authors:  R. Sanchez, I. Güneralp)
  3. Surface-Water/Groundwater Interactions in Watersheds That Recharge the Texas Reach of the Rio Grande/Rio Bravo - Ronald Green, Southwest Research Institute, San Antonio, TX (co-authors:  B. Fratesi N. Toll)
  4. Irrigation Withdrawals from Transboundary Aquifers: How Crop Markets Overcome Physical and Institutional Water Constraints - Iman Haqiqi, Purdue University, West Lafayette, IN (co-authors:  -S. Jame, L. Bowling, T. Hertel, J. Liu)

Tuesday / July 10 / 3:30 PM – 5:00 PM
Concurrent Sessions 13, 14, 15

SESSION 13:  Texas Troubles?
Moderator:  Lindsay Sansom,
Texas A&M University, College Station, TX

  1. Performance of Infiltration Basins in El Paso, Texas - Scott Reinert, El Paso Water, El Paso, TX (co-authors:  Scott Reinert, Zhuping Sheng, Abudu Shalamu, Gretchen Miller, Sora Ahn)
  2. Understanding Changes in the Water Quality in the Ogallala Aquifer, Texas - Timothy Goebel, Texas Tech University, Lubbock, Texas, US (co-authors:  R. L. Lascano, J. S. Stout)
  3. Impacts of Human Activities on Groundwater Availability in the Paso del Norte Region Along the Mexico-US Border - Zhuping Sheng, Texas A&M AgriLife Research, El Paso, TX, (co-authors:  J. Tracy, S. Abudu, S. Ahn, R. Sanchez)
  4. Water Under Stress in the Arid Paso del Norte Region: Rights, Institutions, Boundaries, Threats - Josiah (Joe) Heyman, University of Texas at El Paso, El Paso, TX (co-author:  W. Hargrove)

SESSION 14:  Cooperation, Security, and Conflict
Moderator:  Zaki Shubber,
IHE Delft, Delft, Netherlands

  1. The Groundbreaking Mississippi v. Tennessee U.S. Supreme Court Case: Coming Soon to an Aquifer Near You? - Michael E. Campana, Oregon State University, Corvallis, OR
  2. Quantifying the Negative Impacts of Damming River Omo on Lake Turkana Communities Consequent Conflicts - John Bosco Namwamba, Southern University, Baton Rouge, LA (co-authors:  J.B. Namwamba, Y. Twumasi, F. Namwamba, J. Egbe and R. Okwemba)
  3. National Water Security Strategy to Manage the Transboundary Aquifers in Mexico - Carlos Gutierrez, IMTA, Progreso, Jiutepec, Morelos State, Morelos, Mexico  (co-authors:  M. López-Pérez, M. Martínez-Morales, C. Gutiérrez-Ojeda, D. Ortega-Gaucín, M. Suárez-Medina, H. Sanvicente-Sánchez, E. Aguilar-Garduño, M. Saldaña-Fabela, J. Izurieta-Dávila, S. Navarro-Barrazas, A. Pedraza-Gama)
  4. Towards Improved Governance of Transboudnary Aquifers in Southern Africa: the Establishment of the Stampriet Transboundary Aquifer System (STAS) Multi-Country Cooperation Mechanism (MCCM) - Tales Carvalho Resende, UNESCO Internationa Hydrological Programme Division of Water Sciences, Paris, France  (co-authors:  P. Kenabatho, B. Swartz, K. Majola, R. Sekwele)

SESSION 15:  The Times They Are A-Changing
Moderator:  Renee Martin-Naigle,
A Ripple Effect, PLC, Ebensburg, PA

  1. Assessing the Implications of Variabilities of Vlimate and Effluent Discharges on Groundwater Recharge Downstream of the Nogales International Wastewater Treatment Plant (NIWTP) in the Santa Cruz Aquifer - Elia Tapia, University of Arizona, Tucson, AZ (co-authors:  E. Shamir)
  2. Effects of Changing Available Water Regimes on Riparian Vegetation in the Mesilla Valley Basin Aquifer,  NM - Aracely Tellez, New Mexico Water Resources Research Institute, Las Cruces, NM (co-authors:  K. Boykin, F. Ochoa, S. Fernald)
  3. Tribal Participation in California's SGMA Implementation Processes - Mackenzie R. Johnson, UC Davis, Davis, CA (co-author:  E. R. Middleton)
  4. Role of Knowledge in Groundwater Governance - Berdakh Utemuratov, Civil and Environmental Engineering Department, University of Connecticut, Storrs, CT (co-author:  C. Kirchhoff)