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Chapter 2 WD Test
Chapter 2 Watershed Dynamics Test Study Stack
| Question | Answer |
|---|---|
| Sewage plant | point source pollution |
| storm water runoff in a city | non-point source pollution |
| new highway built | non-point source pollution |
| runoff from a road into a nearby stream | non-point source pollution |
| sediment run-off, the main pollution problem in the Yadkin River Basin | non-point source pollution |
| What happens to stream flow if you cut down trees in a forest near a stream? | stream flow increases |
| Causes of sediment pollution in streams and rivers are: | agriculture, new construction, new housing developments, new roads, bridges |
| Eventually, water in a river basin empties into the _________ | ocean |
| When studying pollutants in a watershed, scientists have concluded that | pollutants are carried by the water as runoff into a central river |
| New developments or construction often results in | an increase in the level of contaminants that enter the basin |
| Silt fencing, sandbags and gravel are often put around construction sites. Why? | They help prevent the erosion of exposed topsoil into the surrounding areas. |
| In a growing community, citizens have to consider _________________________ | local water supplies. |
| Many existing reservoirs of fresh, uncontaminated water are | being depleted and stressed by contamination. |
| Over 1 billion people in the world do not have access to clean, safe water for the following uses: | consumption, sanitation, hygiene |
| Which land use would include pollution from oil and gasoline discharge from automobiles and storm sewer drainage? | Urban runoff |
| Define "habitat." | Requirements an organism needs to sustain life including food, shelter and water. |
| Which creates more surface runoff: paved areas or wooded areas? | paved areas |
| Reason vegetation in riparian zones help to maintain water quality: | Controls erosion by slowing surface runoff; sediments and some pollutants get removed before water drains into streams; provides shade for stream preventing large swings in temperatures. |
| List the 4 major land uses identified by watershed managers | Forests; wetlands;agriculture;urban |
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8teach8
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