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1. When do floods occur? Floods occur when a river's channel cannot hold all the water supplied to it by its watershed (the area the river drains).

2. What is a floodplain? A floodplain is a flat area immediately adjacent to the river that has been built by river processes

3. In the section on Flooding Hazards, what three (3) questions and their answers impressed you the most?

A. Should you really build a house on that flat, scenic area next to a stream? NO

B. The "100 year" flood will occur once every 100 years FALSE

C. The Recurrence Interval of a certain size flood is the average time between flooding events. TRUE

4. What is a drainage basin?is a part of the surface of the earth that is occupied by a drainage system, which consists of a surface stream or a body of impounded surface

5. Drainage basins include?The area over which snow and rain fall that provides a stream with its water is called its drainage basin (or watershed). The watershed includes the stream and all its tributaries as well as the adjacent hill slopes that drain into these tributary streams. Its root, or base, is the point where the stream exits the watershed.

6. What is discharge? The amount of water flowing in a stream is called its DISCHARGE

7. How is discharge determined?, which is the volume of water moving in a stream during a given time interval. Time is usually expressed as seconds, but volume can be in cubic feet (ft3) or cubic meters (m3). So, discharge can be either cubic feet per second (ft3/s, also termed cfs) or cubic meters per second (m3/s). We'll be using the metric system for our determinations, but at the end of this activity you have the opportunity to convert from m3/s to cfs.

Finish the activity and copy and paste your certificate on the next page.

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