Document Type

Honors Project

Abstract

This project assesses how streamflow is affected by anthropogenic changes to the environment, looking specifically at the St. Croix River Basin. In 2004 the United States Geologic Survey (USGS) published a report on streamflow in the St. Croix River at two gaging stations: Danbury and St. Croix Falls. The streamflow at the upstream station near Danbury, Wisconsin remained stable over time, while an increase was observed at the station in St. Croix Falls, Wisconsin further downstream. In order to evaluate this disparity, this project utilizes a GIS hydrologic model to analyze the factors expected to be influencing the flow rate. Of primary focus are the effects of land use changes, including urbanization (an increase in impervious surfaces), land cover and agricultural practices, as well as other sources of increased runoff. Data came primarily from state and federal agencies, and the Soil and Water Assessment Tool (SWAT) is the hydrologic model used. The result of this process is an analysis of the influence of anthropogenic factors on streamflow.

 
 

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