Now, let’s see how groundwater flow and contamination can be affected by other p

Question

Now, let’s see how groundwater flow and contamination can be affected by other processes such as removing groundwater. Do you think that there is a connection between the flow direction of surface water features (rivers or lakes) and groundwater?

Part C - Removing groundwater and its effect on the water table

If George Lilly begins to irrigate his farm and this significantly lowers the water elevation in his well, what could this mean about the groundwater flow of the surrounding area?

Select the correct answer from (1,2,3,4)

1. The groundwater flow could change, causing the water to flow toward Lilly's farm.

2. The groundwater flow could change, causing the well to go dry.

3. The groundwater flow wouldn't change, since withdrawing groundwater does not affect the water elevation.

4. The groundwater flow could change, causing the water to flow away from Lilly's farm.

Part D - Contaminant transport and the interaction with stream channels

How might a contaminant plume be affected by intersecting a stream channel?

Select the correct answer from (1,2,3,4)

1. The stream channel would not affect the contamination plume.

2. The contamination would be concentrated down the stream channel.

3. The contamination would be diffused into the landscape.

4. The stream channel would cause the contamination to stop flowing.

Part E - Contaminant movement in the Hazard City region

If a large toxic spill soaked into the ground on Highway 342 two miles east of Hopper, which city is most likely to be affected by the contamination?

Select the correct answer from (1,2,3,4)

1. Hopper

2. Wrightstown

3. Hutton

4. Hazard City

Explanation / Answer

There is a connection between flow direction of surface features and ground water. Surface water features like streams either gain from inflow to ground water and lose water by outflow to ground water. Flow directions between ground water and surface water changes seasonallly as ground water table elevations changes with respect to stream surface altitude or changes when rise in stream surfaces during storm recharges the streambank.

Part C:

Removing ground water over a longer period of time at a faster rate than it is replenished means that the water table elevation lowers in that area which ultimatley results in drying of wells.

So in this case the ground water flow could change resulting in drying of wells.

Part D:

When a contaminant interacts with a stream it will effect the area of the water column close to the area of the discharge and some distance downstream of the discharge zone where mixing occurs. It will also effect the region 0-6 inches below the sediment surface and this is know as biologically active zone.

So a contaminant plume on intersecting a stream channel would cause the contamination to be diffused into the landscape.

Part E:

The city likely to affected will be Hopper because it is closest to the highway 342 where the large toxix spill have been soaked into the ground

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