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A groundwater flow study was performed near your home in the Coachella Valley. A tracer dye was injected into a well 500 feet north of the Whitewater River. The tracer dye was detected in the river exactly 100 days after it was injected.

a. What is the general direction of groundwater flow?
b. What is the groundwater velocity in feet per day?
c. What is the groundwater velocity in feet per hour?

14. There has been a contaminant spill one mile from your home. If the groundwater is flowing at the same rate as your answer from 13b, how many days would it take for the contaminants to reach your home's well? (1 mile = 5280 ft)

Answer :

Thus, it would take 1056 days for the contaminants to reach the home's well if the groundwater is flowing at the same rate as in 13b.

Groundwater is the water present beneath Earth's surface in the pores of soil and rock, composed of varying quantities of water.

A ground-water flow study was performed near your home in the Coachella Valley and it was discovered that the general direction of groundwater flow is southward, towards the Whitewater River.

In order to calculate the groundwater velocity in feet per day, we need to use the formula:

v = d / t

Where: v is the velocity (feet per day)d is the distance traveled (feet)t is the time taken (days)The distance from the well to the river is 500 feet, and the tracer dye was detected in the river 100 days after injection. Thus, the velocity is:

v = 500 / 100 = 5 feet per day

To convert feet per day to feet per hour, we multiply by 24 (the number of hours in a day):

5 × 24 = 120 feet per hour

To determine how long it would take for the contaminants to reach the home's well if the groundwater is flowing at the same rate as in 13b, we divide the distance by the velocity.

The distance from the contaminant spill is 1 mile, which is 5280 feet:

time = distance / velocity

time = 5280 / 5 = 1056 days

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