Presentations Library
Workshops
WERI Workshop 2025
WERI Workshop 2024
WERI Water Resources Forum 2022
WERI Workshop 2020
Session 1 (Friday, 1/31/2020):
- Welcome & Overview 1, Welcome & Overview 2
- NGLA Review
- NGLA Database and Map
- NGLA History and Recommendations
- NGLA Sinkholes
Crosstalk Forum Well Rehabilitation Lessons Learned:
- GWA Railey ; EA Shambach ; APDI Polovich, ppt, video ; GEPA Marquez
- Yigo-Tumon Basin DOWLs
- MSERP and OGAMP – New and Renew DOWLs
Session 2 (Friday, 2/7/2020):
WERI Workshop 2017
Session 1 (9/11/2017):
Session 2 (9/18/2017):
- Welcome & Overview
- Review Salinity Basics
- Rainfall Patterns Aquifer
- Salinity & Lens Analysis
- GW Modeling
- OGAMP
Workshops
WERI Workshop 2025
WERI Workshop 2024
WERI Water Resources Forum 2022
WERI Workshop 2020
Session 1 (Friday, 1/31/2020):
- Welcome & Overview 1, Welcome & Overview 2
- NGLA Review
- NGLA Database and Map
- NGLA History and Recommendations
- NGLA Sinkholes
Crosstalk Forum Well Rehabilitation Lessons Learned:
- GWA Railey ; EA Shambach ; APDI Polovich, ppt, video ; GEPA Marquez
- Yigo-Tumon Basin DOWLs
- MSERP and OGAMP – New and Renew DOWLs
Session 2 (Friday, 2/7/2020):
WERI Workshop 2017
Session 1 (9/11/2017):
Session 2 (9/18/2017):
- Welcome & Overview
- Review Salinity Basics
- Rainfall Patterns Aquifer
- Salinity & Lens Analysis
- GW Modeling
- OGAMP
Groundwater Resources Development Group - Technical Experts Group - OGAMP
Groundwater Resources Development Group - Technical Experts Group
WERI Guam Advisory Council Meetings
WERI Guam Advisory Council Meetings
2024
- Welcoming Remarks & Introduction
- Overview of WERI and USGS 104B Program
- 2024 Seasonal Recap, Rainfall, and a Look Ahead
- MAppFx: A Data Visualization Interface for Guam and CNMI
- Patterns and Trends of Salinity in Guam
- Climate Change Impacts on Guam’s Rainfall
- Deep Observation Wells in the NGLA
- Preliminary Assessment of Basic Water Quality for Hagatna Swamp, Guam
- Roundtable Discussions
2023
- Tomhom Basin Phreatic Model, and GWA Master Plan Production Well Relocation (N.C. Habana)
- Nitrate-N Solute Transport Model of Swamp Road Area Development Plan (A. Bautista)
- MAppFx: Production Well Nitrate-N NGLA & Southern Guam Flow Duration Curves (D. Valerio)
- PFAS Contamination Status in the Hagatna Region (M. Duenas)
- Analysis of Historical Patterns and Trends of Salinity in the Northern Guam Lens Aquifer (H. Ko)
- The Year in Rainfall, ENSO, Next Year’s Forecast (W. Aydlett)
- Package Wastewater Treatment
- Groundwater Protection Zone
2022
The 2022 Advisory Council Meeting was a part of the Western Pacific Subsection of the American Waterworks Association (AWWA-HIWPS) Conference as a free session either in-person or virtual.
As a free session in the AWWA-HIWPS Conference, the following topics was covered:
- WERI: Who We Are and What We Do
- Surface Hydrology of the Northern Guam Lens Aquifer
- Establishing Groundwater Protection Zones in Guam
- Groundwater Model of the Machanao Basin, NGLA
- Hydrogeological Working Definition of Sinkhole
- Patterns and redns of Salinity in the Yigo-Tumon Basin
- PFOS in Saipan Production Wells
- Stormwater Management for Garapan, Saipan
- Water Quality Analysis for FSM Utility Laboratories
- FSM Water Education Program
- WERI Scholarships: Joseph D. Rouse, Mark A. Lander
2021
- Welcome and Introductory Remarks
- WERI: Who we are and what we do
- Guam Water Kids
- Surface Hydrology of the Northern Guam Lens Aquifer
- CHamoru Names of Northern Plateau Basins
- Guam Hydrologic Survey Website
- WERI Web MApps
- State of the Climate 2021
- Geologic Features of a Discharging Coastal Cave, Ayuyu Cave, Guam
- 3D Groundwater Model: Wastewater-Nitrogen Solute Transport
- Trends and Patterns of Salinity in Finegayan Basin
- Calibrating the Yigo-Tumon Groundwater Model
- Establishing Groundwater Protection Zones in Guam
- Guam Climate Projection: Sea Level, Rainfall and Typhoons
- Open Discussion
2020
Guam Part I
- Welcoming Remarks, Introductions
- WERI Overview
- WERI Services
- Guam CWMP
- Guam Hydrologic Survey
- GHS Website
- WERI Water Quality Lab Expansion
- Nitrates Baseline in the NGLA
- Business Model
- Aquifer Recharge
- 70 Years of Temperature, Rainfall, and Wind
- Surface Hydrology of the NGLA
- Roundtable Discussions
- AWWA Business Session
- Announcements
- Election of Officers
Guam Part II
- Welcoming Remarks, Introductions
- WERI Overview
- Groundwater Quality and Aquifer Protection
- Nitrate Analysis Update
- Potentially Impacted PFAS Sites
- Analysis of Patterns and Trends of Salinity
- Groundwater Protection Zones
- Aquifer Basin Analysis and Modeling
- Hydrological Features in Finegayan
- Model of Yigo-Tumon Basin
- Groundwater Discharge
- Stormwater Management Modeling
- Geotechnical Characteristics of Guam Soils
- Roundtable Discussions
- Closing
- Joseph D. Rouse Scholarship
- Closing Remarks
2019
- Welcoming Remarks, Introductions
- WERI Overview
- Briefings on current and completed research activities:
- Aquifer Sustainable Yield
- Coastal Discharge Survey
- Lens Response to Recharge
- Modeling Yigo-Tumon Basin
- Nitrates Baseline in the NGLA
- Wastewater Treatment with Seawater
- PFOS in the NGLA
- GIS Analysis of Groundwater Salinity Patterns
- Fena Reservoir Sedimentation Hazard
- Santa Rita Spring Rehabilitation
- Guam Water Kids Outreach Program
- 2020 WERI Aquifer Tours and Workshops
- Roundtable Discussions: Current Guam water resources issues, critical water resource research, education and training
Conferences, Symposiums, Summits, and Exchanges
Conferences, Symposiums, Summits, Exchanges
2025
- Worldwide Meteorological Organization/United Nations Economic and Social Commissions for Asia and the Pacific’s (WMO/UNESCAP) Typhoon Committee Conference | Tumon, Guam | September 2025
- Advance Mitigation Frameworks for Extreme Rainfalls Under Climate Change (C. Yeo)
- Flash Flood Model at Guam’s Rt. 4 Pagu Bay Bridge (N.C. Habana)
- 10th Assembly of Planners Symposium | Tumon, Guam | August 2025
- Water Pollutants/PFAS (B. Kim)
- Hydrologic Map of Guam Watersheds (N.C. Habana)
- Northern Guam Soil and Water Conservation District Educator’s Symposium 2025 | Guam Museum, Hagatna, Guam | July 2025
- Northern Guam Lens Aquifer Basics and Web MApps on the Guam Hydrologic Survey website (N.C. Habana)
- Universities Council of Water Resources (UCOWR) Conference 2025 | Minneapolis, Minnesota | June 2025
- Updating the Northern Guam Lens Aquifer’s (NGLA) Groundwater Protection Zone (GWPZ) (R. Uludong)
- Hydrologic Data Analysis from the Deep Observation Wells in the Northern Guam Lens Aquifer (M.C. Snaer)
- Center for Island Sustainability (CIS) Conference 2025 | Hyatt Regency, Tumon, Guam | April 2025
- MAppFx: Bringing Guam’s Data into the Future (D.K. Valerio)
- Guam Educators Conservation Summit (GECS) | Hyatt Regency, Tumon, Guam | April 2025
- Surface Hydrology and Terrain Analysis of Southern Guam (N.C. Habana)
- International Collaborative Research Workshop Between Changwon National University and University of Guam | University of Guam, Mangilao | January 2025
- Patterns and Trends of Salinity on Guam (H. Ko)
- Deep Observation Wells (M.C. Snaer)
- MAppFx Data Visualization (D.K Valerio)
- Virtual Tour of the Northern Guam Lens Aquifer (N.C. Habana)
2024
- UOG CNAS: 4th Annual STEM Conference: “Building Bridges, Breaking Barriers in STEM” | University of Guam, Mangilao, Guam | March 2024
- Exploring Deep Observation Wells in the Northern Guam Lens Aquifer: A STEM Investigation (M. C. Snaer)
- Analysis of Historical Patterns and Trends in the Northern Guam Lens Aquifer (H. Ko)
- Nitrate-N Solution Transport Model of Swamp Road Area Development Plan (A. Bautista)
- MAppFx: A Data Visualization Interface (D. K. Valerio)
- MAppFx: Demonstration (M. W. Zapata)
- Research Exchange with Feng Chia University | University of Guam, Mangilao, Guam | May 2024
- Exploring Deep Observation Wells in the Northern Guam Lens Aquifer (M. C. Snaer)
- Relationships between Changes in Withdrawal, Recharge, Sea Level, and Chloride Concentration within Nine Active Water Production Wells in the Yigo-Tumon Basin, Northern Guam Lens Aquifer: An Analysis of a 45-Year Multivariable Time Series (H. Ko)
- Nitrate-N Solute Transport Model of Swamp Road Area Development Plan (A. Bautista)
- Data Visualization with MAppFx ( D. K. Valerio, M. W. Zapata)
- Delineating Groundwater Protection Zones (E. Ardeo)
- Guam Forest System Plan Summit | Hyatt Regency Guam | June 2024
- UOG Inaugural Research Forum | School of Business and Public Administration, University of Guam, Mangilao, Guam | August 2024
- AWWA HIPS: Annual Water and Wastewater Conference: “Emerging Challenges for Pacific Island Water Producers” | Hyatt Regency Guam | September 2024
- MAppFx: CNMI Production Well Chloride & Nitrates (M. W. Zapata, D. K. Valerio, N.C. Habana)
- AWRA-UCOWR-NIWR 60th Anniversary Joint Water Resources Conference: “Celebrating the Past and Planning for the Future of Water” | Hyatt Regency St. Louis Arch | St. Louis, Missouri | October 2024
- The Dynamic Response of the Water Source in the Northern Guam Lens Aquifer to Climatic Events (M. C. Snaer)
- Nitrate-N Solute Transport Model of Swamp Road Area, Northern Guam Lens Aquifer (A. Bautista)
- NWGA: National Groundwater Week | Las Vegas, Nevada | December 2024
- The Dynamic Response of the Water Source in the Northern Guam Lens Aquifer to Climatic Events (M. C. Snaer)
- Chloride Trends in the Yigo-Tumon Basin, Northern Guam Lens Aquifer, 1973-2022: Natural and Anthropogenic Factors (H. Ko)
2023
- Research Exchange with Feng Chia University | University of Guam, Mangilao, Guam | April 2023
- UCOWR/NIWR: Annual Water Resources Conference | Colorado State University, Fort Collins, Colorado | June 2023
- Drilling Deep Observation Wells in Carbonate Island Karst: The Monitoring System Expansion and Rehabilitation Program, Guam (M. J. Z. Villareal, J. W. Jenson, K. K. Bautista)
- MAppFx: NGLA Production Well Nitrate Concentrations (D. K. Valerio, M. W. Zapata, N. C. Habana)
- NGSWCD: Educators Symposium: Un Hånom (One Water) | Guam Museum, Hågatna, Guam | August 2023
- NGLA Virtual Tour (N. C. Habana)
- MAppFx: NGLA Production Well Nitrates (D. K. Valerio)
- NGWA: National Groundwater Week | Las Vegas, Nevada | December 2023
- Nitrate-N Solute Transport Model of Swamp Road Area Development Plan (A. Bautista)
- Analysis of Historical Patterns and Trends in the Northern Guam Lens Aquifer (H. Ko)
- MAppFx: NGLA Production Well Nitrates (D. K. Valerio)
2021
- Northern Guam Soil & Water Conservation District: Educators Symposium | University of Guam, Mangilao, Guam | August 2021
- Guam Water Kids (K. K. Bautista)
- Northern Guam Lens Aquifer Virtual Tour (N. C. Habana)
Other Presentations
Other Presentations
A compilation of slides highlighting WERI projects (N.C. Habana, 2024).
WERI Slides Collection 2024
A compilation of slides highlighting WERI projects (N.C. Habana, 2024).