Soil Erosion and Monitoring Techniques

The video tutorial covers key techniques for monitoring soil erosion, including erosion plots, surveying, and traces. It discusses factors affecting erosion, such as erodability and erosivity, and the impact of water and precipitation. The role of biogeographers in analyzing hill slope systems is highlighted, along with methods of surveying and using erosion plots. The use of traces and radioisotopes, particularly cesium, in studying erosion is also explored, noting advantages and disadvantages.

Which of the following is NOT a technique for monitoring soil erosion?

• Erosion plots

• Surveying

• Irrigation

• Traces

What is a factor that affects erodability?

• Evapotranspiration

• Precipitation drop size

• Solar radiation

• Land use

What type of rocks can produce alluvial fans and scree slopes?

• Unconsolidated rocks

• Cohesive rocks

• Igneous rocks

• Metamorphic rocks

What is the effect of running water and precipitation on soil called?

• Saturation

• Permeability

• Erosivity

• Erodability

What happens when soil reaches its saturation point?

• It becomes less permeable

• It starts to evaporate

• It leads to mud flows or rotational slump

• It becomes more cohesive

What do biogeographers measure to assess hill slope stability?

• Soil particle size

• Solar radiation and precipitation

• Vegetation type

• Rock type

Which of the following is considered an output in hill slope systems?

• Solar radiation

• Percolation

• Weathering

• Precipitation

What is a disadvantage of using radioisotopes in soil erosion monitoring?

• Limited availability

• High cost

• Complex instrumentation

• Inaccurate results

What does an increase in cesium-137 in an area indicate?

• Decreased erosion

• Increased erosion

• Accumulation of soil

• Depletion of soil

Why is the use of cesium-137 less precise in wet acid upland hills?

• It is not a strong emitter

• It is easily mobilized into plant roots

• It is not affected by precipitation

• It has a short half-life