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Understanding Soil Erosion and River Formation: Key Concepts and Human Impact

This guide explores major human activities that contribute to soil erosion, such as poor farming practices, road construction, and irrigation. It explains river formation, including the process of smaller streams merging into larger bodies of water. Key terms include tributary, watershed, and sediment deposition. The document serves as a rough draft and study guide ahead of critical assessments provided by Ms. Evan’s website. Students are encouraged to review concepts of erosion, discharge, and the impacts on Earth’s surface through various processes.

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Understanding Soil Erosion and River Formation: Key Concepts and Human Impact

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  1. CRCT Question • Soil Erosion is mostly caused by what human activity: • Building of roads • planting tree farms • Irrigation • Poor farming practices

  2. Due dates 1. Rough draft Soil: TOMORROW *Don’t need Pictures for rough draft 2. Study guide for final Part II: TOMORROW *Answers on a separate sheet of paper  3. Study guide for test: THURSDAY

  3. Nervous for your final? Use Ms. Evan’s Website!!!! INTERIMS

  4. River Systems

  5. How does a river form? a. Streams join other small streams to form larger ones and eventually all of the water flows into one and forms a river Ex: Suwanee Creek, Ivy Creek, etc. all flow into the Chattahoochee Can you think of another one?

  6. Run-Off b. Network of streams and rivers that drains an area is its runoff.

  7. c. Tributary– a stream that flows into a lake or into a larger streams. d. Watershed (drainage basin) – is the area of land that is drained by a water system. *The largest watershed is the Mississippi river watershed. *Figure 3 page 310

  8. Parts of a River E . Divide – the boundary between drainage areas that have streams that flow in opposite directions F. Load: the materials a river carries. Fast moving rivers carry large particles Extra: A channel is the path that a stream follows. Young streams are narrow and deep. • Erosion makes it wider and deeper-making it a river!

  9. G-Deposition-process in which material is laid down or droppd. A river’s deposition is called sediments • Can make deltas

  10. Extra: A stream’s ability to erode • Gradient: measure of change in elevation. High gradient will give more energy to erode • Discharge: Amount of water that a stream or river carries.

  11. Reshaping Earth’s Surface A. Sand dunes – a mound of wind-deposited sand that keeps its shape even though it moves B. Glaciers – a large mass of moving ice C. Mass movement – is the movement of any material, such as rock, soil, or snow, down a slope

  12. Work and Watch • As you are working, watch the video on Rivers. • Pay close attention to river formation and the effects of erosion and deposition

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