Week 3
Lecture 5: Hillslope Runoff and DTMs
Outline:
- Basin scaling and topographic resolution
- DEM flow path determination
- Channel extraction from coarse DEMs
- downstream reach issue
- support area threshold
- convergent vs divergent landscape areas
- Steady-state hillslope runoff model
Course reading
- Montgometry, D. R. and Dietrich, W. E. 1988. Where do channels begin? Nature 336:232-234.
- Montgometry, D. R. and Dietrich, W. E. 1992. Channel initiation and the problem of landscape scale. Science 255: 826-830.
Related web links:
- The Identification and Mapping of Flow Networks from Digital Elevation Data
- TARDEM- A suite of programs for the Analysis of Digital Elevation Data
- Terrain modelling using ArcView GIS
- TOPOG model website
Lecture 6: Channel Initiation
Outline:
- Field evidence for channel initiation mechanisms
- Channel heads from threshold criteria
- what is a channel anyway?
- slope vs area threshold
- Steady-state saturated overland flow erosion model
Course reading:
- Dietrich, W. E., Wilson, C. J., Montgometry, D. R., and McKean, J. 1993. Analysis of erosion thresholds, channel networks and landscape morphology using a digital terrain model. J. Geology 101:2:259-278.
Related web links:
Experiment 1: Hillslope Geomorphology
Sunday field trip to Stebbins Cold Canyon Reserve.
Meet in the parking lot behind Veihmeyer Hall at 8:00 am sharp.
Be prepared for these potential hazards: poor footing, poison oak, heat exhaustion.
Review field safety information
Suggested clothing: hiking or work boots, long pants (preferably lightweight), long sleeve shirt (preferably lightweight), work gloves, and hat.
Items to bring: field notebook, pen, lunch, water bottle, sun screen
Homework: hyd252asgn1.pdf
