1. Erosion Processes and Sediment Yield
Environmental Hydrology
Lecture 22

2. Outline Sediment Yield and Erosion Processes Estimating Erosion Rates
Sediment budgets (including scale issues)

3. Soil Erosion Vulnerability
Global Dimensions of Vulnerability to Wind and Water Erosion
Paul Reich, Hari Eswaran and Fred Beinroth USDA Natural Resources Conservation Service and University of Puerto Rico
See full report

4. Soil Erosion Vulnerability
Global Dimensions of Vulnerability to Wind and Water Erosion
Paul Reich, Hari Eswaran and Fred Beinroth USDA Natural Resources Conservation Service and University of Puerto Rico
See full report

5. Soil Erosion Vulnerability
Global Dimensions of Vulnerability to Wind and Water Erosion
Paul Reich, Hari Eswaran and Fred Beinroth USDA Natural Resources Conservation Service and University of Puerto Rico
See full report

6. Soil Erosion Rates
from: Walling, D.E., Linking land use, erosion and sediment yields in river basins. Hydrobiologia 410: 223–240, .

7. Worldwide sediment yields

8. Predicting global erosion to oceans
Syvitski et al., Predicting the terrestrial flux of sediment to the global ocean: a planetary perspective. Sedimentary Geology 162: 5 –24

9. Scale effects on sediment yield
Xu Jiongxin and Yan Yunxia, Scale effects on specific sediment yield in the Yellow River basin and geomorphological explanations
Journal of Hydrology, 307(1-4):

10. Erosion Processes
Mass Wasting (gravity driven)
Fluvial (flow driven)

11. Forms of mass wasting
Source: Christopherson, Elemental Geosystems,
4th ed. Prentice Hall

12. Fluvial Erosion
Sheet (interrill) and Rill erosion
Gully erosion

13. Factors affecting erosion rates
Climate
Soil properties
Topography
Vegetation
Landuse (cropping practices, urbanization)
Rill erosion following Buffalo Creek Fire, CO,
Image: J. Moody, USGS
Rill erosion on an urban construction site
Image: USDA NRCS