News & Events

News & Events

RMA Teaches Programming to Kids at The Leaven in Vacaville

July 24-27, 2017 — Vacaville, CA

Bryan Gray, Rami Gasim and Joey Lewis taught a 4-day robotics class to children at The Leaven in Vacaville, an after-school mentoring and tutoring program for struggling neighborhoods. The children learned programming skills, inspiring them to get more involved in STEM.

The Reporter: Leaven youth learn to program robots
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RMA presentations at the 2017 UNTRIM user group workshop

May 15-18, 2017 – Trento, Italy

Tides, Salinity, and Transport in the San Francisco Estuary
Presented by: Stephen Andrews
Supporting Authors: Ed Gross, John DeGeorge

Over-bank free-surface hydrodynamics in HEC-RAS 1D
Presented by: Ben Chacon

RMA Presents at the 2017 California Water and Environmental Modeling Forum Annual Meeting

March 20-22, 2017 — Folsom, CA

Tides, Salinity, and Transport in the Pre-development San Francisco Estuary
Presented by: Steve Andrews
Supporting Authors: Ed Gross, John DeGeorge

The Influence of Estuarine Circulation on Recruitment from the Ocean to Low Salinity Zone Habitat
Presented by: Ed Gross

Conference website: 2017 CWEMF Annual Meeting

RMA Presents at the 2017 Interagency Ecological Program Annual Workshop

March 1-3, 2017 — Folsom, CA

Insights on Regional Effects of Tidal Marsh Restoration
Presented by: John DeGeorge

Conference website: 2017 IEP Annual Workshop

RMA Presents at 2016 Bay-Delta Science Conference

November 15-17, 2016 — Sacramento, CA

Evaluating Potential Swimming Behaviors of Adult Delta Smelt by Application of a Particle Tracking Model with Alternative Behavior Rules
Presented by: Ed Gross

Examining Hypothesized Delta Smelt Environmental Cues and Swimming Behaviors using an Agent-Based Model
Presented by: Ben Saenz

A Tale of Two Deltas: A Comparison of Transport Processes in the Historical and Contemporary Delta
Presented by: Jon Burau (USGS)
Supporting Author: John DeGeorge (RMA)

A New Dimension to Historical Ecology: Insights from a 3D Hydrodynamic Model of the Pre-Development Estuary
Presented by: Sam Safran (SFEI)
Supporting Author: Steve Andrews (RMA)

Effects of the Emergency Drought Barrier on the Transport of Zooplankton to Delta Smelt Habitat
Presented by: Wim Kimmerer (SFSU)
Supporting Authors: Ed Gross (RMA), Steve Andrews (RMA)

Conference website: 9th Biennial Bay-Delta Science Conference

USACE Hydrologic Engineering Center Releases CWMS 3.0.1

We are very pleased to announce that USACE Hydrologic Engineering Center has released CWMS 3.0.1.  Many thanks to the RMA Development and QA teams who participated in this project: Shannon Larson, Mark Ackerman, Peter Morris, Andreas Christmann, Shannon Newbold, Rami Gasim, Scott Burdick, Kevin Smith, and Bryan Gray.

Chris Enright joins the RMA team

RMA is honored to welcome Chris Enright to the team. Chris comes to RMA with thirty years of experience in the field of water resources.  He brings a deep knowledge of the Bay-Delta and Suisun Marsh systems, which he developed during his twenty year tenure at DWR and six years with the California Delta Science Program. During his career he has focused on bridging engineering and biological/ecological understanding of the San Francisco estuary and watershed for meeting public water management priorities.

Bryan Gray Joins the RMA Team

RMA welcomes Junior Software Quality Assurance Engineer Bryan Gray to the team. Bryan is a 2010 graduate of CSU Sacramento with a Bachelor’s degree in Mechanical Engineering.  In his spare time, Bryan continues to work with the FIRST Robotics Program, where he has volunteered for the past 12 years.

Publication in San Francisco Estuary and Watershed Science

Title: A Water Balance Model to Estimate Flow Through the Old and Middle River Corridor
Authors: Andrews, S. W. (RMA), E. S. Gross (RMA), P. H. Hutton (MWD)

Andrews, S. W., E. S. Gross, P. H. Hutton. (2016). “A Water Balance Model to Estimate Flow Through the Old and Middle River Corridor”, San Francisco Estuary and Watershed Science, 14(2). jmie_sfews_31636.

Tevin Youn Joins the RMA Team

RMA welcomes Junior Software Developer Tevin Youn to the team. Tevin is a recent graduate of UC Davis with a Bachelor’s degree in Computer Science.

Scott Burdick Joins the RMA Team

RMA welcomes Junior Water Resources Specialist Scott Burdick to the team. Scott is a recent graduate of UC Davis with a Bachelor’s degree in Environmental Science and Management with a focus on GIS and Python.

RMA presentation at the 2016 UNTRIM user group workshop

May 30- June 1, 2016 – Trento, Italy

New computational features of HEC-RAS for 1D and 2D free-surface hydrodynamics
Presented by: Ben Chacon

RMA Programmer Certifications

On May 5th, 2016 three of our programmers earned Programmer Certifications.

Congratulations to the following people for earning Oracle Certified Associate, Java SE8 Programmer I

  • Adam Korynta
  • Ryan Miles
  • Joshua DeGeorge

and to Adam Korynta for earning Oracle Certified Professional, Java SE8 Programmer II

Great work!

Dr. Edward Gross is now a Principal of RMA

We are very pleased to announce that Dr. Edward Gross has become a Principal of RMA along with Donald Smith, Richard Rachiele, and John DeGeorge. Dr. Gross has worked with RMA since 2011, taking a leading role in the development and application of multi-dimensional models for hydrodynamics, particle tracking, and transport analysis. He is recognized as an expert in estuarine physics and transport processes, particularly in the San Francisco Estuary, and often collaborates with faculty and researchers at Stanford University, UC Davis, UC Berkeley, Tokyo University of Marine Science and Technology and other universities and research institutes.

RMA Presents at 2016 CWEMF Annual Meeting

April 11-13, 2016 — Folsom, CA

Synthesizing Data, Isotope Analyses and DSM2 Nutrient Model Output to Characterize Nutrient Transformations in the Delta
Presented by: Marianne Guerin
Supporting Authors: C. Kendall, S. Peek, and M. Young (USGS); E. Novick, R. Holleman, T. Jabusch, J. Sun, P. Trowbridge, and D. Senn (SFEI)

Delta Emergency Response Tool: Development and Operational Forecasting
Presented by: Jeremy Hill (DWR)
Supporting Authors: John DeGeorge (RMA) and Shankar Parvathinathan (MBK Engineers)

Recommendations for a Modeling Framework to Answer Nutrient Management Questions in the Sacramento-San Joaquin Delta
Presented by: Mike Deas (Watercourse Engineering)
Supporting Authors: P.R. Trowbridge, E. Ateljevich, E. Danner, J. Domagalski, C. Enright, W. Fleenor, C. Foe, M. Guerin (RMA), D. Senn, and L. Thompson

Conference website: CWEMF Annual Meeting 2016

Marianne Guerin Receives 2016 CWEMF Distinguished Life Membership Award

On April 11, 2016, at the California Water and Environmental Modeling Forum Annual Meeting, Marianne Guerin was presented with the Distinguished Life Membership Award.

“The California Water and Environmental Modeling Forum’s Distinguished Life Membership Award is given annually to active or past members who, through long and distinguished service, have made a major contribution to the CWEMF and to the California water and environmental modeling profession. The recipient must have been a CWEMF member for at least ten years (not necessarily in a row) and been a regular attendee at the CWEMF Steering Committee Meetings and/or Annual Meetings or have other significant contributions to the organization.”

We congratulate Marianne on receiving this much deserved award!

Publication in Journal of Geophysical Research Oceans

Title: Time scales in Galveston Bay: An unsteady estuary
Authors: Rayson, M. D., E. S. Gross (RMA), R. D. Hetland, and O. B. Fringer

Rayson, M. D., E. S. Gross, R. D. Hetland, and O. B. Fringer, “Time scales in Galveston Bay: An unsteady estuary”, J. Geophys. Res. Oceans, 121, doi:10.1002/2015JC011181, 2016.

Kevin Smith Joins the RMA Team

RMA welcomes Software Quality Assurance Engineer Kevin Smith to the team. Kevin has a Bachelor’s degree in Business Administration and over 10 years’ experience in software quality assurance and technical support.

RMA has moved to Davis!

Our office has moved to Davis! You can now find us at 1756 Picasso Avenue, Suite G in Davis. Our new phone number is 530-564-7043.

RMA Presentation at 2015 Coastal & Estuarine Research Federation Conference

November 8-12, 2015 – Portland, Oregon

The influence of gravitational circulation on estuarine recruitment of negatively buoyant organisms
Presented by: Edward Gross, Wim Kimmerer and Rusty Holleman

RMA Presentation at the Delta Independent Science Board Meeting

October 14-16, 2015 — Oakley, California

Modeling Potential Impacts of Channel Barriers and Levee Failures on Delta Water Quality
Presented by: John DeGeorge
Supporting Authors: Richard Rachiele, Stacie Grinbergs, Steve Andrews

RMA presentations at the 2015 UNTRIM user group workshop

May 18-20, 2015 – Trento, Italy

Hydrodynamic and salinity changes in the Sacramento-San Joaquin Delta, 1850-present
Presented by: Stephen Andrews
Supporting Authors: Ed Gross, John DeGeorge

New computational features of HEC-RAS for 2D free-surface hydrodynamics
Presented by: Ben Chacon

Ryan Miles joins the RMA team

RMA welcomes Junior Software Quality Assurance Engineer and Developer Ryan Miles to the team. Ryan holds a Bachelor’s degree in Game and Simulation Programming.

RMA Presentation at the Integrated Modeling for Adaptive Management of Estuarine Systems Workshop

March 21-22, 2015 — UC Davis Campus

The National Science Foundation in coordination with the Delta Stewardship Council and UC Davis Center for Watershed Sciences sponsored the Integrated Modeling Workshop to explore ways to improve development and application of modeling for multipurpose management of estuarine systems, with emphasis on the San Francisco Bay and Sacramento-San Joaquin Delta. At the workshop John DeGeorge demonstrated the DWR Delta-Emergency Response Tool (ERT) and USACE Corps Water Management System Control and Visualization Interface (CWMS-CAVI), two software applications developed by RMA. The Delta-ERT, developed for the California Department of Water Resources, provides rapid evaluation of potential impacts of levee failure events in the Sacramento-San Joaquin Delta. The US Army Corps of Engineers CWMS-CAVI facilitates integrated modeling for real-time water control operations including rainfall runoff, reservoir operations, river hydraulics, and flood consequence components.

Workshop website: Integrated Modeling for Adaptive Management of Estuarine Systems
Workshop

2015 Interagency Ecological Program (IEP) Workshop Presentation

March 18-20, 2015 — Folsom, CA

Using Isotopes to Quantify Nitrate Versus Ammonium Contributions to Phytoplankton
Presented by: Carol Kendall (USGS)
Supporting Author: Steve Silva, Megan Young, Sara Peek, Tamara Krauss (USGS), Calla Schmidt (USF), Marianne Guerin (RMA), Alex Parker (CSUM), Will Stringfellow (LLNL)

Conference website: IEP 2015 Workshop

Don Smith Receives 2015 CWEMF Career Achievement Award

On March 9, 2015, at the California Water and Environmental Modeling Forum Annual Meeting, RMA’s president, Don Smith was presented with the Career Achievement Award.

“The California Water and Environmental Modeling Forum’s Career Achievement Award is given to individuals for significant contributions over their career in developing, using or promoting computer modeling to Analyze California’s water-related problems.”

We congratulate Don on receiving this much deserved award!

award

RMA Presents at 2015 CWEMF Annual Meeting

March 9-11, 2015 — Folsom, CA

3D Modeling Comparison of Salinity in the Historical and Contemporary Delta
Presented by: Steve Andrews
Supporting Author: Edward Gross and John DeGeorge

2014 Drought Forecast Modeling in 1, 2 and 3D
Presented by: John DeGeorge
Supporting Authors: Richard Rachiele, Stacie Grinbergs and Steve Andrews

Project updates: Characterizing and Quantifying Nutrient Sources, Sinks and Transformations in the Delta
Presented by: Marianne Guerin (RMA)
Supporting Authors: Carol Kendall and Megan Young (USGS), David Senn and Emil Novak (SFEI)

Conference website: CWEMF Annual Meeting 2015

CWMS REGI Training Class Presented at the USACE Hydrologic Engineering Center

February 10th – 12th, 2015 — Davis, CA
Peter Morris, Shannon Larson, Adam Korynta and John DeGeorge provided a three-day training class on the Corps Water Management System Report Generation Interface (CWMS-REGI).  The class included lectures and hands on workshops for gathering and organizing water control data, entering that data into the CWMS Oracle database and use of REGI for daily operations, reporting and operations support.  The class was attended by over 30 USACE District staff from across the country.

RMA presentations at 2014 Bay-Delta Science Conference

October 28-30, 2014 — Sacramento, CA

Development of a Three-Dimensional, Stratified Flow Model of the Natural Delta
Presented by: Stephen Andrews and John DeGeorge
Supporting Authors: Edward Gross and Stacie Grinbergs

Reducing Uncertainty in the Design of in-Delta Sampling Experiments Using Particle-Tracking Models
Presented by: Marianne Guerin (RMA)
Supporting Author: Tamara Krauss (USGS)

Individual Based Modeling of Juvenile Chinook Salmon
Presented by: Ed Gross
Supporting Authors: Michael MacWillimans (Delta Modeling Associates), Benjamin Saenz (RMA), Aaron Bever (Delta Modeling Associates)

Quantifying Nutrient Loads and Transformations in the Delta
Presented by: Emily Novick (SFEI)
Supporting Authors: David Senn (SFEI), Marianne Guerin (RMA), Carol Kendall (USGS), Megan Young (USGS), Anthony Malkassian (SFEI/ UCSC), Don Yee (SFEI)

Tracing Nitrate and Ammonium Dynamics within the San Joaquin- Sacramento River Confluence Region Using Stable Isotopes
Presented by: Megan Young (USGS)
Supporting Authors: Carol Kendall (USGS), Rachel Mixon (USGS), Marianne Guerin (RMA), Sara Peek (USGS), Alex Parker (California Maritime Academy)

Conference website: Bay-Delta Science Conference 2014

New release of HEC-RAS 5.0 beta with new RAS2D feature

The USACE Hydrologic Engineering Center has released a new update of the HEC-RAS version 5.0 beta which includes: spatially varying Manning’s n values for 2D Flow Areas; velocity plotting for 1D and 2D areas; and improved hydraulic structure connections for 2D Flow Areas. The RAS2D computational engine was developed by Ben Chacon at RMA for HEC.

CWMS CAVI 3.0 demonstration and workshop at the USACE Forth Worth District

September 29th thru October 1st, 2014 — Fort Worth, TX
John DeGeorge and Mark Ackerman provided a two-day workshop on the new features of the USACE Corps Water Management System – Control and Visualization Interface (CWMS-CAVI) version 3.0. Attendees included staff from the Galveston, Fort Worth, Little Rock, and Tulsa District offices. This training workshop was set up to facilitate the national deployment of the CWMS system for real-time water control operations.

Caleb Dechant, Ph.D. joins the RMA team

RMA welcomes Caleb DeChant to the team. Caleb comes to RMA with a strong academic and practical background in civil engineering, hydrologic and hydraulic modeling, and computer programming. He received his Ph.D. in civil engineering from Portland State University in June 2014.

RMA presentation at 2014 13th IWA specialized conference on watershed and river basin management

September 9-12, 2014 — San Francisco, CA

Delta Turbidity Forecasting Using the Watershed Analysis Risk Management Framework (WARMF) and RMA11
Presented by: Mr. Scott Sheeder (Systech Water Resources) and Marianne Guerin (RMA)

RMA presentation at the HEC-RAS advanced user training at the USACE hydrologic engineering center

August 18, 2014 — Davis, CA

Class Lecture: Introduction to 1D/2D Unsteady Flow River Hydraulics and Equations
Presented by: Ben Chacon

Software: HEC-RAS

Christopher Bradley joins the RMA team

RMA welcomes new Systems Administrator Christopher Bradley to the team. Chris brings nine years of IT experience and is a Certified Information Security Manager and Microsoft Certified Systems Administrator.

RMA presentations at 2014 ASCE/EWRI world environmental & water resources congress

June 1-5, 2014 – Portland, OR

Columbia River Treaty 2014/2024 – Integrating Numerical Models, HEC-WAT Plug-in Technology
Presented by: John DeGeorge (RMA)
Supporting Authors: Mark Ackerman (RMA), Penni Baker (USACE Hydrologic Engineering Center)

Columbia River Treaty 2014/2024 – Distributed Computing for HEC-WAT/FRA
Presented by: Ryan Ripken (RMA)
Supporting Authors: Joshua M. DeGeorge, John DeGeorge (RMA), Matthew J. Fleming, Penni Baker (USACE Hydrologic Engineering Center)

Columbia River Treaty 2014/2024 — Monte Carlo Simulation in HEC-WAT
Presented by: Beth Faber (USACE Hydrologic Engineering Center)
Conference Proceeding Lead Author: Ben Chacon (RMA)
Supporting Authors: John DeGeorge (RMA), Matthew Flemming (USACE Hydrologic Engineering Center)

Conference website: ASCE/EWRI World Environmental & Water Resources

Adam Korynta joins the RMA team

RMA welcomes Junior Software Quality Assurance Engineer and Developer Adam Korynta to the team. Adam is a recent UCLA graduate.

RMA presentations at the 2014 UNTRIM user group workshop

May 19-20, 2014 – Trento, Italy

Unstructured grid particle tracking model formulation and testing
Presented by: Edward Gross (RMA)
Supporting Authors: Gerard Ketefian (RMA), Guus Stelling (Delft)

Development and Calibration of the Historical Sacramento-San Joaquin Delta Model
Presented by: Stephen Andrews
Supporting Authors: John DeGeorge, Ed Gross, Stacie Grinbergs

Subgrid Bathymetry Free-Surface Hydrodynamics in HEC-RAS
Presented by: Ben Chacon

Deziree Dizon joins the RMA team

RMA welcomes Junior Software Quality Assurance Engineer / Developer, Deziree Dizon, to the team.

RMA presentations at the 2014 annual meeting of the California water and environment modeling forum

February 24-26, 2014 — Folsom, CA

Modeling seasonal nutrient transformations and losses in the Delta: Project findings on the effects of using time-and-space-varying DICU concentrations in DSM2 V8.1.2
Presented by: Marianne Guerin

Development of the 3D Natural Delta Model
Presented by: Stephen Andrews
Supporting Authors: John DeGeorge, Ed Gross, Stacie Grinbergs

Conference website: 2014 California Water and Environment Modeling

RMA hosts Fairfield High School computer programming class

December 5, 2013 — RMA Office, Fairfield, CA

John DeGeorge led a discussion with local high school students on the application of computer programming in support of California water resources management, with special focus on visualization of hydrodynamic and water quality modeling of the Sacramento-San Joaquin Delta.

RMA presentation at the 2013 Floodplain Management Conference

September 5, 2013 — Anaheim, CA

Real-Time Modeling Tool Developed for DWR’s Delta Flood Emergency Preparedness and Response and Recovery Program
Presented by: John DeGeorge (RMA) and Jeff Twitchell (GEI)
Supporting Authors: Martin McCann, Jr. (Jack R. Benjamin & Associates, Inc.), Dustin Jones, (CA Department of Water Resources)

Conference website: 2013 Floodplain Management Conference

Invited presentation at 2013 workshop on the state of the science on fish predation on salmonids in the bay-delta

July 22, 2013

An Overview of Delta Hydrodynamics and Transport
Presented by: John DeGeorge

RMA presentations at the 2013 UNTRIM user group workshop

May 27-29, 2013 — Trento, Italy

Analysis of a Proposed Operable Barrier for Salinity Control in the Sacramento-San Joaquin Delta
Presented by: Stephen Andrews
Supporting Authors: Stacie Grinbergs, Richard Rachiele, John DeGeorge, Ed Gross, Marianne Guerin

Comparison of Diffusion Wave and Shallow Water Equation Simulation of Free-Surface Hydrodynamics in HEC-RAS
Presented by: Ben Chacon

Publication in Estuaries and Coasts

Title: Characterization of the Microcystis bloom and its nitrogen supply in San Francisco Estuary using stable isotopes
Authors: P. W. Lehman, C. Kendall, M. A. Guerin (RMA), M. B. Young, S. R. Silva, G. L. Boyer and S. J. Teh

P. W. Lehman, C. Kendall, M. A. Guerin, M. B. Young, S. R. Silva, G. L. Boyer and S. J. Teh. In press. Characterization of the Microcystis bloom and its nitrogen supply in San Francisco Estuary using stable isotopes. Estuaries and Coasts. DOI: 10.1007/s12237-014-9811-8

RMA presentation at DSM2 users group

March 6, 2013

An RMA Animation Tool for Visualizing QUAL Model Output
Presented by: Marianne Guerin and Richard Rachiele

Presentation PDF: Animation Tool for Visualizing QUAL

Marianne Guerin advances from convener to past-convener of the California Water and Environment Modeling Forum

Marianne Guerin of RMA has completed her two-year tenure as Convener of the California Water and Environmental Modeling Forum. As Convener, Marianne worked at re-invigorating CWEMF after a slide in participation during the Great Recession of 2008. By sponsoring half-day “Hot Topics” seminars that presented a factual review of controversial topics, CWEMF regained footing as an impartial forum for educating the modeling community. Now as Past-Convener, she provides mentoring to the new Convener, Ben Bray with EBMUD. Thanks Marianne for your hard work for CWEMF!

RMA presentations at the 2013 annual meeting of the California Water and Environmental Modeling Forum

Evaluating Productivity Potential for Prospect Island Restoration Alternatives Using Particle Tracking Methods
Presented by: Stephen Andrews
Supporting Authors: Richard Rachiele, John DeGeorge

A New Regression Relationship of X2 with Delta Outflow
Presented by: Ed Gross
Supporting Authors: Gerard Katefian

How Good Is My Model? Assessing Model Skill in a Regulatory Environment
Presented by: Marianne Guerin

Invited presentation at the Delta Independent Science Board Meeting

January 17, 2013 — Sacramento, CA

Recent Projects Modeling Local and Regional Impacts of Tidal Marsh Restoration
Presented by: John DeGeorge
Supporting Authors: Donald Smith, Richard Rachiele, Edward Gross, Stacie Grinbergs, Marianne Guerin, Stephen Andrews

Invited panel presentation at the state water resources control board workshop 3: analytical tools for evaluating the water supply, hydrodynamic, and hydropower effects of the bay-delta plan questions

November 13-14, 2012 —Sacramento, CA

Modeling is for Developing Insights
Invited panel members included: Jon Burau (USGS), John DeGeorge (RMA), John Durand (UC Davis), Greg Gartrell (CCWD), Marianne Guerin (CWEMF), Jay Lund (UC Davis), Pete Smith (USGS – ret.), William Smith (MWH), Mark Stacy (UCB), Staff — Chris Enright (DSC)