Visualizing Groundwater Dispersion: Laboratory Exercise on Dispersivity with Hands-on and Online Students
Keywords:laboratory exercise on dispersivity, physical groundwater flow models, hands-on students, online students, hands-on learning
Longitudinal groundwater dispersion is measured by calculating the spreading of a solute in the direction of groundwater flow as a function of time, with dispersivity being the plume dispersion divided by the groundwater velocity. Two-dimensional physical groundwater flow models were used in a laboratory exercise to illustrate groundwater dispersion to hands-on and online students. Learning assessment of the pedagogical value of the laboratory exercise was based on a student survey and an independent laboratory assignment graded by the course instructor. Both tools indicated that student learning was effectively enhanced by the dispersivity laboratory exercise; however, it was more effective for the hands-on students.
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