Concluding the Rosgen Replication

: In this lesson, we will use a template to report on a reproduction study.

Friday, March 19 and Monday March 22

Reading

The following paper will help contextualize our work on reproducing a Rosgen Classification method, and should serve as an important reference in your lab report (no separate blog response needed).

1. Kasprak, A., N. Hough-Snee, T. Beechie, N. Bouwes, G. Brierley, R. Camp, K. Fryirs, H. Imaki, M. Jensen, G. O’Brien, D. Rosgen, and J. Wheaton. 2016. The blurred line between form and process: A comparison of stream channel classification frameworks ed. J. A. Jones. PLOS ONE 11 (3):e0150293. https://dx.plos.org/10.1371/journal.pone.0150293.

NEW 3/18 Which parts of Kasprak et al (2016) should be helpful in report writing?

• Introduction discusses motivation for, and challenges of, river classification
• Methods
  • starts with two sections describing geographic context of John Day Watershed and characteristics of the CHaMPS data
  • compares information used in four different classification techniques in table 2
  • briefly reviews the Rosgen classification system. Are there differences from our methods?
  • details of the other three classification systems are less important for us. It’s just interesting to note that:
    • The River Styles Framework examines much longer sections of river than the Rosgen reaches
    • The Natural Channel Classification framework tries to infer what a natural/undisturbed channel would look like without human influence
    • The Statistical Classification framework is an inductive data-driven approach, with no predetermined hierarchical decision tree like Rosgen and the other two
    • a quick tabular comparison of the systems is offered in table 2
• Results
  • Rosgen classification system section gives you a sense of how representative your individual site was in a one paragraph summary
  • Comparison of framework agreement section gives insight into sources of uncertainty
• Discussion
  • Find your site in Table 5 to see how it was classified by the four techniques
  • Why do classification frameworks differ? section gives insight into sources of uncertainty
  • Form and process in channel classification section gives insight into sources of uncertainty

Friday Mach 19 Agenda

• At the beginning of class, we will spend some time interpreting the terrain data and discussing sources of error and uncertainty.
• Remaining time will be for working on the GIS Analysis.

Resources:

• The Bare Earth
• River Bathymetry Toolkit

I added the relative elevation model to the RE-Rosgen GitHub repository if you’d like to use it.

• One input parameter is the start point for the drain. You can get this by right-clicking at the beginning of your stream on the map in GRASS and copying the coordinates. Then just paste the coordinates into the model as you run it.
• The model assumes that you have already created the relief map (in the first model).
• The model contains one more addon function: r.hydrodem
• Let me know if you try it or have any questions!

Monday March 22 Agenda

• Convene in the Orchard for lab/office hours time devoted to resolving any outstanding questions/problems with the Rosgen Reproduction.
• As you wrap up the GIS Analysis report, the only new instruction from me will be:
  • strategies for saving and publishing the analysis or
  • response to any issues in or questions about the GIS Analysis

GIS Analysis Report

Your report is due in the form of a page on your GitHub pages on March 24 at noon. date pushed back to Wednesday

A template for this report is found in the rosgen repository: docs\report\HEGSRR-Replication-Report.md

Concurrently with the report in your pages repository, commit and push all changes to your rosgen research repository to your GitHub account.

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