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http://serc.carleton.edu/woburn/student-modules/geo_setting/crosssection.html

Read this article and answer the following three questions please.

1. Which units in the geologic cross section appear to be aquifers and able to store and transmit significant volumes of water? Assume that sand and gravel units have the highest hydraulic conductivity and clay and bedrock have the lower hydraulic conductivity's.

2. Which units in the geologic cross section are confining layers that are not able to transmit and store significant volumes of water?

3. Assume that each of the wells shown in the cross section is open or screened to allow water to enter the wellbore only over the bottom 10 feet of the well. Use your geologic cross section to determine which wells appear to be hydraulically connected to the most permeable material such as sand or sand and gravel?

Explanation / Answer

1. Sand with Gravel or Cobble are the beds able to store and transmit maximum water.

2. Peat and Silt layers are confining layers which are not able to transmit and store significant volumes of water.

3. S65 & S88

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