What is the primary purpose of a water reservoir for a community?

To provide a designated area for recreational boating and fishing.

To store a reliable supply of freshwater for community needs.

To generate hydroelectric power for the surrounding region.

To serve as a natural habitat for local aquatic wildlife.

Which two factors are most directly responsible for the balance of the water level in a natural lake used as a reservoir?

The daily air temperature and the speed of the wind.

The number of fish and the types of aquatic plants living in the lake.

Inflow from rain and rivers, and outflow from community water usage.

The depth of the lake and the geological composition of the lakebed.

A new factory that uses a lot of water opens in the town.

The community's population grows rapidly over a short period.

The area experiences a prolonged period of above-average rainfall.

The pipes that draw water from the reservoir are upgraded to be larger.

Water from melting snow on nearby mountains.

Rainwater that falls directly into the lake.

Water drawn by the community for homes and businesses.

Water entering the reservoir from an underground spring.

The amount of rainfall is exactly equal to the amount of water the community uses.

Heavy rainfall and increased river flow significantly raise the water level.

The community's water usage is consistently greater than the supply from rain and rivers.

The reservoir is a large, natural lake with multiple rivers flowing into it.