Depth Collecting Procedure
Objective: Collect the depth of Fox Run
Materials:
Procedure:
1.Using the already placed clothes pins, cord, and stakes that were used in the previous test, the width test, measure the depth of the stream at each of the four clothes pins.
2.To do so, insert the zero side of the meter stick into the water.
3.Adjust the submerged meter stick forward and backward to avoid the tops of rocks or obvious holes.
4.Make sure the meter stick is being held before reading the increments from the side, for this prevents the water from piling up and giving a higher reading than true if the meter stick faces into the current. If the readable surface is turned down the stream, the opposite will happen.
5.Stand to the side when taking the depth measurements because standing directly upstream or downstream can cause an inaccurate reading.
6.Use the four depth measurements to calculate the average depth, which is done by adding the four depths together and dividing by four.
7.Record the depth measurement in meters.
Velocity Collecting Procedure
Objective: Collect the velocity of Fox Run
Materials:
Procedure:
1.Using the measuring tape measure five meters down steam from both of the original stakes used in the width and depth tests. Do this one stake at a time.
2.At the five meter mark, hammer the new stakes into the ground.
3.Attach separate piece of cord to the one new stake, stretch it across the stream, and tie it to the other new stake, making sure to not make it a saggy clothes line.
4.Assign each member of the group with the jobs of the timer, the tennis ball dropper, the tennis ball catcher, and the “eyes”.
5.Assume positions. The tennis ball dropper should be in the water upstream of the starting line, the “eyes” on land at the starting line, the tennis ball catcher in the water down stream of the finish line, and the timer on land at the finish line.
6.Drop the tennis ball slightly upstream from the first clothes pin, and make sure to stand to the side of the drop zone. When the ball passes the starting line, start the timer.
7.Yell, “Stop,” as soon as the ball crosses under the finish line and immediately stop the timer.
8.Repeat steps 5-7 for each clothes pin.
9.Record the times in seconds.
10.Add the four times together and divid by four to get the average time traveled in five meters. Then divid five meters by the average time to receive the velocity of the stream in the selected section.
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