Question of the day: 1. What are some examples of local dams and reservoirs? 2.What are the benefits of dams? 3.What are the disadvantages of dams?

Local examples

Dams and Reservoirs Benefits: – Ensure year-round supply of water with regulated flow – Generate electricity – Provide recreational activities Disadvantages – Alter the ecosystem – Reduce sediment load

Dams and Reservoirs- Problems created by them Salmon Population in Columbia River very low due to dams that impede migration Fish ladders help, but are not effective enough

Movement of Dam Removal k6s&safety_mode=true&persist_safety_mode =1&safe=active k6s&safety_mode=true&persist_safety_mode =1&safe=active

Salmon Run Game

Dams and Reservoirs Glen Canyon Dam – Regulated flow has changed ecosystem To rectify situation – Canyon has been flooded several times – Small floods compared to natural floods – Still helps rebuild habitat

Read pgs Questions: Who is in charge of building dams in the US? What was one main reason for the building of dams? Which rivers/river communities were they trying to protect? What is the controversy behind the Meramec Dam? What was a local controversy over dam building? Explain our states unique circumstances with the Delaware River Basin.

Questions from pg Describe how dams provided easier travelling along the river. What are the advantages/disadvantages of hydropower?

The plight of the salmon

Delaware River Basin Commission Report on Gas well drilling in the basin ils/article/28/2010/december/10/debate- expected-over-gas-drilling-rules.html ils/article/28/2010/december/10/debate- expected-over-gas-drilling-rules.html