Water Quality Essay

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Comparing Our Local Water: White Rock Creek and Lake Lavon

Emma LeGare

May 11, 2012

Introduction
The purpose of going into the field to conduct the water quality tests was to test the different ways water could potentially be infected of polluted. The tests we ran helped determine the amount of pollution and whether or not it is safe for the wildlife to live in as a habitat. The tests we conducted were: temperature, turbidity, conductivity, flow rate, pH, and GPS.

The location where we conducted the tests was White Rock Creek. It was in between lots of trees and it was on a slope. The biotic factors located in the creek were moss, algae, trees, grass, minnows, spiders, and frogs. Some of the abiotic factors at the creek were the sun, water, rocks, and broken tree limbs. Due to the to White Rock Creek being on a downhill the origin is primarily East Fork Trinity. White Rock Creek’s location is at latitude of 33.11503 and a longitude of -96.60764. With it being about 0.2 meters deep and is about 3 meters wide. The area around the creek gets it water from the East Fork Trinity watershed and has a terminal point of Lake Lavon.

Materials
* LabQuest
* Conductivity Probe
* Temperature Probe
* Turbidity Probe
* Flow Rate Probe
* pH Sensor
* GPS Probe
* 4 cups
* 1 pipettes
* 1 graduated cylinder
* 1 bucket with White Rock Creek water
* 1 bucket with Lake Lavon water
* 1 bucket with Lab water with
* 3 measuring cups
* 8 fat-head minnows
* 1 Sharpie

Tests
The tests we ran were: conductivity, temperature, turbidity, flow rate, pH, and GPS.
The conductivity test measures the ability of a solution to conduct an electric current between two electrodes, and measures the concentration of ions. The first thing we did was set the range to high, put the tip of the probe into the sample of water to be tested. We gently swirled the probe for 30 seconds and let to LabQuest read it and recorded the results. The standard for conductivity was < 2200 µus/cm. The temperature test measures the Thermistor’s resistance and converts it into the temperature. The first thing we did was put the tip of the probe into the water, then swirled it around for 30 seconds while the LabQuest generated a temperature. Then we recorded it in our journals. The standard for the water was 0-33 degrees Celsius. The turbidity test measures cloudiness of the water. First, we filled the cuvette with some water from the creek, and then we lined up the two arrows and closed it. We pressed play on the LabQuest and run for 30 seconds. Then recorded the results in our journals. The standard for turbidity is 0-42 NTU, which stands for Nephelometric Turbidity Unit. The flow rate determines the size of the sediments that can be transported by the creek. Flow rate also effects the temperature of the water. First, we submerged the impeller of the sensor to 40% of the depth. Then we had to find where the current was and keep it in the current for 30 seconds. Next we recorded the results in our journals. The standard for the flow rate varies. The pH test measures how acidity or basicity of the water. Low pH can affect membranes which can affect the ability of the fish’s’ gills to...
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