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Chris Smemoe

GSSHA Course at the Hydrologic Engineering Center in Davis, CA, USA

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We are pleased to announce that a GSSHA course will be held free of charge to a limited number of attendees.  Government workers with expertise in hydrology have highest priority in attending this course.  Please contact Chris Smemoe at Aquaveo or see the information below for more information about this course.

Workshop on Watershed Modeling with GSSHA
April 11-13, 2017
Arctic Hydrology in GSSHA
April 14, 2917
Hydrologic Engineering Center, Davis, California
You will learn the basics of:
• Gridded Surface Subsurface Hydrologic Analysis (GSSHA) model, developed at the U.S. Army Corps of Engineers, Engineering Research and Development Center and the University of Wyoming
• Dept. of Defense Watershed Modeling System (WMS), developed by Aquaveo LLC
• Spatial data needed to estimate distributed GSSHA model parameters, including data requirements, basics of GSSHA/WMS and how to find and use spatial geographic data to develop GSSHA models using the WMS Hydrologic Model Wizard.
• Simulating Arctic hydrology with GSSHA in the one day course feature on April 14.

The GSSHA model with WMS support constitutes a complete watershed analysis system that can be used for a variety of hydrologic science and engineering computation and design evaluation, such as flood simulation, hydrologic impacts of land use change, and best management practice design and testing of flood mitigation measures. This course will feature new developments in sediment transport and artic hydrology.
Course Layout:
Through a combination of lectures and experiential applications, the course features the spatially distributed modeling components of this system. The course begins with an overview of the capabilities of the WMS to ensure maximum benefit from the hands-on portions of the class. Attendees will learn to use WMS to set up GSSHA models that include overland flow, infiltration, distributed rainfall, hydraulic structures, continuous simulations, flood inundation mapping, and sediment transport. A one day course on Artic Hydrology will feature snow melt accumulation and melt, simple methods in GSSHA to simulate seasonally frozen soil, and soil water/thermodynamic modeling in GSSHA for seasonally frozen soils as well as permafrost regions.
Having completed this course, attendees will gain a working knowledge of the U.S. Army Corps of Engineers (USACE), Engineer Research and Development Center (ERDC) GSSHA model that is supported by the Watershed Modeling System (WMS) interface software. You will also understand how, when, and why you might be able to apply the tools to specific studies as well as understand the input data requirements. This class provides the user with sufficient background to easily set up a sophisticated hydrological model.
Who Should Attend?
The course is intended for anyone interested in flooding, the effects of landscape changes on hydrology, and/or analyzing best management practices and flood control measures, sediment transport and cold regions hydrology. Experience with hydrologic modeling and numerical methods are a plus but not absolutely required. Some college-level background in hydrologic science and/or engineering is required.
Instructors: This short course will be taught by the lead GSSHA developer Dr. Charles W. Downer and GSSHA developer and cold regions expert Dr. Nawa Raj Pradhan, USACE-ERDC.
Utility: Once GSSHA models are developed, they can be archived and run in the LINUX supercomputer environment. The GSSHA code is parallelized using OpenMP for execution on multi-core CPUs and is being parallelized by USACE-ERDC for execution in a distributed memory environment.
Requirements: Your own computer with the latest version of the Watershed Modeling System (WMS) software installed. This software can be downloaded from
You will be provided with information to license WMS at the start of the course.
You can download the tutorials here: These materials will also be available at the course.
Fees, access, other: The course is offered free of charge by dedicated civil servants, just trying to make it great. The course is taught at the Hydrologic Engineering Center, 609 Second Street, Davis, CA. PDHs are awarded based on contact hours. There are 30 possible contact hours.
Information: For information about the course contact: Charles W. Downer For local Davis, CA information contact Dr. Billy E. Johnson
Schedule: The basic course is three days, followed by a one day artic hydrology section. The afternoon of Day 3 is comprised of extensive training on sediment transport, including new in-stream sediment transport features in GSSHA.
Day 1 – Introduction to GSSHA and Building a Basic GSSHA Model with the Hydrologic Wizard
Day 2 - GSSHA Model Applications
Day 3 - GSSHA Advanced Topics
Morning – Groundwater
Afternoon – Sediment transport
Day 4 – Artic Hydrology
A detailed itinerary follows.
Day 1 Tuesday, April 11. Introduction to GSSHA and Building a Basic GSSHA Model with the Hydrologic Wizard
Start Finish Duration Activity Topic

08:30 08:45 15 Greeting Introduction of Instructors/Attendees
08:45 09:30 45 Lecture Introduction to Hydrologic Modeling – Presentation 1
09:30 10:15 45 Lecture Introduction to GSSHA – Presentation 2
10:15 10:30 15 Break
10:30 10:45 15 Lecture WMS overview using digital spatial data Presentation 4
10:45 11:00 15 Lecture Images and projections – Pres 5
11:00 11:25 25 Workshop WMS basics and images – Tutorial 40 through 7
11:25 12:00 30 Demo Using the WMS Hydrologic Model Wizard
12:00 13:00 60 Lunch
13:00 13:20 20 Lecture Watershed delineation using DEMs – Presentation 7
13:20 13:40 20 Lecture Overland flow modeling in GSSHA – Presentation 8
13:40 13:50 10 Lecture Basic model setup in WMS – Pres 9
13:50 14:10 20 Workshop Basic model setup with WMS with the Hydrologic Wizard - Tutorial 47 sec. 8
14:10 14:40 30 Lecture Stream routing – Presentation 12A
15:40 14:55 15 Lecture Assigning channel properties with WMS
– Presentation 12B
14:55 15:10 15 Break
15:10 15:30 20 Workshop Adding streams to your model with the Hydrologic Wizard – Tutorial 47 Sec. 9
15:30 15:45 15 Lecture Developing index maps with spatial data - Presentation 10
15:45 16:15 30 Lecture Modeling infiltration – Pres 11A
16:15 16:25 10 Lecture Using WMS to develop infiltration inputs – Presentation 11B
16:25 16:45 20 Workshop Adding overland processes to your model using the Hydrologic Modeling Wizard – Tutorial 47 Section 10-16
16:45 17:00 15 Recap of 1st day
Day 2, Wednesday, April 12, 2017 GSSHA Model Applications
Start Finish Duration Activity Topic

08:00 08:15 15 Lecture Distributed rainfall – Presentation 14B
08:15 09:15 60 Workshop Distributed rainfall – Tutorial 49
09:15 09:30 15 Break
09:30 09:45 15 Review Distributed rainfall
09:45 10:15 30 Lecture Hydraulic structures and embankments – Presentation 15
10:15 10:30 15 Lecture Using WMS to develop land-use change scenarios – Pres 17
10:30 12:00 90 Workshop Land use change – Tutorial 50 & 51
12:00 13:00 60 Lunch
13:00 13:45 45 Lecture Continuous simulations - Pres 18 ABC
13:45 14:45 60 Workshop Continuous simulations – Tutorial 52
14:45 15:00 15 Review Continuous simulations
15:00 15:30 30 Lecture Flood inundation modeling – Pres 20&21
15:30 15:45 15 Break
15:45 16:45 60 Workshop Flood inundation modeling – Tut 55
Day 3, Thursday, April 13, 2017 GSSHA Advanced Topics
Start Finish Duration Activity Topic

08:00 08:45 45 Lecture Groundwater Modeling Fundamentals 30
08:45 09:15 30 Lecture Groundwater Modeling in GSSHA 31
09:15 10:00 45 Lecture Using WMS to develop groundwater
model inputs - Pres 32
10:00 10:15 15 Break
10:15 11:15 60 Workshop Basic Groundwater Modeling – Tut 59
11:15 12:15 60 Workshop Surface groundwater interaction – Tut 60
12:15 13:30 75 Lunch
13:30 14:00 30 Lecture Sediment Transport – Pres 21
14:00 14:15 15 Lecture Sediment Transport Interface – Pres 21A
14:15 15:00 45 Workshop Sediment Transport – Tutorial 53
15:15 15:30 15 Break
15:30 16:00 30 Lecture In-stream sediment transport
16:00 16:45 45 Workshop In-stream sediment transport
16:45 17:00 15 Lecture Additional resources – Presentation 23
Day 4, Friday April 14, 2017 Arctic Hydrology
Start Finish Duration Activity Topic

08:00 08:30 30 Lecture Arctic 1 - Continuous simulations with
snow – Pres 19
08:30 09:15 45 Workshop Arctic 1A - Continuous simulations with
snow - Tutorial 64
09:15 09:45 30 Lecture Simple frozen soil options in GSSHA
09:45 10.00 15 Break
10:00 10:30 30 Workshop Simple frozen soil options in GSSHA
10:30 10:50 20 Lecture Soil thermodynamics modeling theory
10:50 11:20 30 Lecture Modelling effects of frozen soil and
hydrological dynamics in permafrost
11:20 12:20 60 Workshop Simulation of frozen soils and hydro
-Simulating soil temperature profile.
-Active layer hydraulic conductivity.
-Watershed discharge.
12:20 13:30 70 Lunch
13:30 14:00 30 Discussion Simulation of frozen soils and hydro

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Here is some further information about this GSSHA course.  If you cannot attend the course, you can attend via the teleconference link as shown below:

VTC – The course will be broadcast via internet and teleconference. Information is below:
Meeting Number: 8774119748
Code: 1445950
Phone Number: 1-877-411-9748
Access Code: 1445950
Pass Code: 3803

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