Part 1 – Basic watershed model for 10 and 100 year storms
This final project will allow you to develop your own hydrologic model for a watershed of your group’s choosing. You should get the DEM data, soils, land use, and use some kind of source to identify the 10 and 100 year storms for your area.
As a minimum you should develop a basic runoff model for both HMS and GSSHA, run the 10 and 100 year storms and compare the results. You should use the information and experience gained during the semester to develop appropriate parameters for both models. Remember the tables which we have used, the sensitivity studies performed, and other analysis and observations.
In your final report you should discuss how you arrived at the parameters you did and explain differences/similarities in the results of the two models.
Part 2 – Applying something extra
For the second part of your modeling study I want you to extend in an area not covered in depth in class. You could choose one of the three advanced modeling applications discussed during the last week (HEC-RAS, GSSHA Boundary Condition, or EPA SWMM Urban Model), or you could find observed data and try to calibrate, or some other extension you are curious to learn more about. Use the HEC-HMS manual, or GSSHA wiki to get further help as needed. If you choose an urban application you may wish to take only a small part of your model from part 1 to do it in, or it could be a separate area altogether but you will not want it to be a very large area. If you choose to do a HEC-RAS model or a regional to local model using HMS and GSSHA then you may want to do Part 1 as only the upstream area that “feeds” the lower HEC-RAS or GSSHA models.When you are finished present your results and discuss your observations of the process.
What you need to turn in:
You should develop a 3-5 page paper (it can be a web page) that:
Provides a basic description of your model study area and how you obtained the data
The development of your modeling parameters
Compare your different models and discuss why results are the same/different
Describe your unique analysis and discuss the results