Conjunctive Use Modeling

Thursday, May 25, 2017 (half-day)


To register for this seminar or if you have any questions, please email Randall Hanson at:



This free seminar is series of lectures discussing the One-Water Hydrologic Flow Model and how to build conjunctive use models, assess sustainability and adaptation scenarios, evaluate climate-change and variability, and advanced integrated modeling techniques.

The One-Water Hydrologic Flow Model (One-Water) is a MODFLOW-based integrated hydrologic flow model designed for the analysis of a broad range of conjunctive-use and sustainability issues. It was motivated by the need to merge the multiple variants of MODFLOW-2005 to yield an enhanced unified version capable of simulating conjunctive use and management, sustainability, climate-related issues, and managing the relationships between groundwater, surface water, and land usage. One-Water links the movement and use of groundwater, surface water, and imported water for consumption by agriculture and natural vegetation on the landscape, and for potable and other uses within a physically-based supply-and-demand framework. The first version, released in 2014, was selected by The World Bank Water Resource Software Review in 2016 as one of three recommended simulation programs for conjunctive-use and management modeling. Additionally, One-Water is being used as the primary simulation engine for FREEWAT, a European Union sponsored open-source water management software environment.

By retaining and tracking the water within the hydrosphere, One-Water accounts for “all of the water everywhere and all of the time.” This philosophy provides more confidence in the water accounting to the scientific community and provides the public a foundation needed to address wider classes of problems. Ultimately, more complex questions are being asked about water resources, requiring tools that more completely answer conjunctive-use management questions.

Check-in begins at 8:00 AM on May 25th and the class begins at 8:30 AM and ends at 12:30PM with a 15 minute break. Afterwards the instructors encourage the attendees to join them for lunch or to discuss projects in the afternoon.

Laptop computer is not required and all course materials will be shared through an ftp site with all participants.



This set of lectures is an overview of a 4-day MODFLOW-OWHM course that has been taught in Davis, CA; Sacramento, CA; Munich, Germany; Dresden, Germany; and Taipei, Taiwan. The main topics covered will be general theory, examples of use, new features in OWHM-v2, and linkages to other features and processes. The MODFLOW-OWHM (One-Water) course will address:

  • Conjunctive Use and Management
  • Integrated hydrologic modelling with advanced groundwater, surface water, and land usage modeling.
  • Concepts behind good model development
  • Designing water balance accounting regions
  • Which model options to use based on level of known information
  • Calibration options
  • Current projects and applications of One-Water
  • Appropriate projects for One-Water applications

The course schedule will include a series of lectures covering these topics. If time permits, then examples will be shown of the steps involved building a conceptual integrated hydrologic model with One-Water



This course is intended for practicing geohydrologists, engineers, and ground-water professionals who wish to build upon existing modeling capabilities. Prospective attendees may:

  • Want to learn more about building models with MODFLOW-OWHM (One-Water),
  • Need a refresher and introduction to the newer modeling techniques,
  • Want to know how the many new packages and recent updates to MODFLOW can be used effectively,
  • Desire some advice and guidance to ensure that the most effective procedures are being used.
  • Getting involved in progressively more complicated modeling problems and desire some guidance from experienced modelers.

This course provides insight into nuances and multiple approaches to solving realistic field problems using the popular One-Water simulation software and includes additional discussions on accompanying tools, such as MODPATH, ZONEBUDGET, and others. It is assumed that the participant understands the principles of ground-water modeling and the basic concepts of MODFLOW.



Randall T. Hanson is a senior research hydrologist with the USGS with over 40 years of experience and leader of the Integrated Hydrologic Model Development Team

Scott E. Boyce is a USGS hydrologist and lead co-developer of MF-OWHM.

Wesley R. Henson is a USGS hydrologist and part of the MF-OWHM development team.



The course will be held on Colorado School of Mines campus (room and building TBA). For parking availability, please refer to the campus map below.

All Visitor parking areas will have a pay and display parking meter. When arriving on campus for the first time, look for a parking meter, find a space in that location, pay the meter and display the receipt on your dash. You will find brochures at each of our parking meters that can also help guide you around the campus.



The fee for the short course is $0.00 and is open to the public to attend and learn about advanced groundwater modeling with One-Water. Lodging, refreshments and meals are not covered. The limit of course attendees will be based on the space available in the conference room.

To register for this seminar or if you have any questions, please email Randall Hanson at:



The Colorado School of Mines is located in Golden, which is 20 minutes west of Denver, 1 hour west of the Denver International Airport and can be reached by taxi, airport shuttle or rental car. It is strongly recommended that for events held on the CSM campus, attendees select accommodations within .5 miles of the campus if a rental car or personal transportation will not be available, as taxi service and public transportation from other areas may involve significant delays and costs. Lodging is available in Golden, within walking distance of the campus.

Denver Shuttle Service from Denver Airport

To get to SuperShuttle when you land, take the train from the Concourse to the Terminal. Pick up your luggage and proceed to the SuperShuttle counter located on Level 5/Baggage Claim, adjacent to the water feature in the center of the terminal. Counter staff will issue tickets and give directions to the van loading areas. For information, call 1-800-BLUEVAN. Their ticket counters are closed between 12am and 6am. If you arrive between these hours, please use the courtesy phone located at the ticket counter to notify dispatch of your arrival. Please contact a shuttle provider directly for more information on fees and destinations served. Shuttles pick-up and drop-off from Jeppesen Terminal Level 5, Island 3, outside doors 505-507 (east side) and 510-512 (west side).

Super Shuttle International Denver

Phone: (800) 525-3177

Web site:

Rental Cars

All Rental car companies at DIA are located on airport property but are away from the main terminal. Each rental company provides a courtesy shuttle to and from Jeppesen Terminal from their locations. All courtesy shuttles pick-up and drop-off from Jeppesen Terminal Level 5, Island 4, outside doors 505-513 (east side) and 504-512 (west side). If you are arriving in Denver, please follow the overhead signage for the appropriate pick-up location, or check-in at your company's counter in the center of the Terminal.
For more information, please visit at


Taxis are readily available and service within the eight counties that make up the Denver metro area. Some companies may also provide service to other destinations within the state of Colorado. Check with your cab company of choice (or directly with your driver at the airport) for more information on fares and destinations served. Fares to Golden area are based on the taxi’s meter and it costs about $70-85 plus the $3.75 airport access fee. Taxis pick-up and drop-off from Jeppesen Terminal Level 5, Island 1, outside doors 507-511 (east side) and 506-510 (west side).



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