Discussion

How does the runoff differ for the agriculture and forest site and what are the effects?

The runoff varies in both temperature and color.

• Pasture runoff is 1-2 degrees warmer ten the forested site and the river (75^oF)
• Pasture runoff is a muddy red-brown color from the sediment it carries with it

Forest runoff meets a river, it is red from the sediments washed with it.

Downstream Effects

• The sedimentation can radically change the physical environment of species restricted to particular conditions of depth, light penetration and velocity
• The bared soil is now losing nutrients it once held; as well as any herbicides, pesticides, or fertilizers
• The runoff interferes with respiration in fish and other gill-breathing organisms further downstream

Effects on Humans

1. Road washouts
2. Erosion of farmlands
3. Watershed

i. ii. iii.