Department or Program

Environmental Studies


Lake Auburn and its surrounding watershed act as a prime example of a freshwater system affected by point and non-point sources of P. Townsend Brook, one of the two major tributaries into Lake Auburn, has proven to be a major source of P into the larger watershed. This study investigates the possible sources and sinks of P across the Townsend Brook sub-catchment of Lake Auburn to gain a better understanding of the potential P loading and its effect on the watershed. Surface water samples were collected from various stream sites within the Townsend Brook sub-catchment in January and February of 2018 and analyzed for TP and ortho-P. TP and discharge data were provided by the AWD/LWD from 2005-2017. The January 2018 samples exhibited peak TP values along the main stem at 83 mg/L, and showed more spatial variability than the February samples. The historic TP and discharge data demonstrated high potential for P loading due to storm events with calculated TP potentially deposited into Lake Auburn at 5.79 mg/day. This study was limited however by the lack of discharge data collected along with the January samples. Further analysis of Townsend Brook should focus on the potential for P filtration due to the wetland.

Level of Access

Restricted: Campus/Bates Community Only Access

First Advisor

Holly Ewing

Date of Graduation


Degree Name

Bachelor of Arts

Number of Pages


Community Engagement



Available to Bates community via local IP address or Bates login.