Chapter 2

Forest hydrology- interception

Watch the video podcasts shown below before coming to class today.

Assignment due before class starts today:

• none.

Reading for today's class:

• Pages 82-91 of Black, P.E. 1991. Watershed Hydrology. Ann Arbor Press, Inc, Chelsea Michigan.

Educational content addessed in this chapter:

• Forest plot water balance: Pg = I + T + F
• Relative amounts of forest water balance components
• Vegetative factors affecting interception
• Atmospheric factors affecting interception
• Gash's analytical model of interception

Assignment we will work on in class today:

• Assignment 1

Related web links:

• Notes on interception
• Stemflow measurment method
• Hubbard Brook LTER throughfall data
• Animated tipping bucket rain gage- this is the primary device used to measure water fluxes in gross precipitation, transpiration, and stemflow in many cases.
• Canopy measurement- Can it possibly be as easy as an eHow entry?

Video Podcast: Forest Hydrology- interception, part 1

This 19-minute presentation introduces the basic water balance for an individual tree and a tree canopy, and the describes the essential vegetative and atmospheric controls on the balance.

• 640 x 480 (480p) format that balances speed and quality. (176 MB file)
• 1920 x 1280 (HD) format that provides larges size and best quality. (973 MB file)

Video Podcast: Forest Hydrology- interception, part 2

This 34-minute presentation illustrates case studies of throughfall, interception, and stemflow in different regions highlighting unique aspects of the tree-scale water balance.

• 640 x 480 (480p) format that balances speed and quality. (455 MB file)
• 1920 x 1280 (HD) format that provides larges size and best quality. (2.61 GB file)

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