Student Research Reports

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To better understand the relationship between electrical conductivity and the seasonal changes that occur within the Dry Creek Experimental Watershed (DCEW) near Boise, ID, measurements of electrical conductivity (EC), temperature, and pH were taken in 3 locations that represent the upper, middle, and lower sections of the watershed within a 24-hour period. The DCEW serves as a laboratory for research and education operated by Boise State University (BSU). An electrical conductivity meter, alcohol filled thermometer, pH meter, and pH paper were used as instrumentation for measurements. In order to find a seasonal range of conductivity, measurements were taken in November of 2021 and compared to historical data from mid-September through mid-November of 2020, collected by Boise State University. The data was then used to generate graphs for further analysis. The results revealed relatively low conductivity levels, and pH values that were neutral to slightly alkaline, indicating low concentrations of dissolved nutrients. However, in order to draw comparisons between data from 2020 and 2021, the use of a comparable continuous data logger would be necessary to relate temperature and electrical conductivity. Water quality measurements are important for monitoring the condition of a body of water and the surrounding land. Measurements such as electrical conductivity (EC) are used to indicate the chemical and biological condition of water. The collection of data can help determine a baseline for what the normal range of conductivity in a given area is. Values that exceed this range could be indicators of additional substances that could cause pollution. Factors such as climate, geology, and land use, have an impact on water quality within a watershed and should be considered in management. Different factors, and environmental relationships could cause electrical conductivity to vary from season to season.