Runoff occurs during storm events when precipitation lands on impervious surfaces. The harmful effects of runoff include erosion, physical property damage, and the transportation of pollutants through stormwater drains into local waterways. One way to mitigate these effects is through rain gardens, which absorb runoff since they are placed in a depression in the ground. The garden allows runoff to infiltrate into the ground, includes native plants to promote biodiversity and filter any runoff pollutants. We have designed an inquiry-based laboratory activity for non-science majors taking an environmental science class to compare and contrast two gardens. Students examine the topography, soil, biodiversity, and pollution retention of the gardens. Based on these measurements and observations, the students then decide which rain garden they feel is more effective in mitigating stormwater runoff and pollution. This lab has been offered both in a face-to face setting as well as online due to COVID-19.
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