Bridgewater State University Virtual Commons - Bridgewater State University Watershed Access Lab Projects Watershed Access Lab 2001 Long Pond Study 2000-2001 Recommended Citation Apponequet Regional High School, Lakeville, Massachusetts (2001). Long Pond Study 2000-2001. In Watershed Access Lab Projects. Project 1. Available at: http://vc.bridgew.edu/wal_projects/1 This item is available as part of Virtual Commons, the open-access institutional repository of Bridgewater State University, Bridgewater, Massachusetts.
Mrs. McNally s Environmental Research Class Matt Keenan, Troy Annichiarico, Martine Rousseau, Lindsey Nickerson, Rebecca Orrall, Kristine Mandeville, Stacy Rousseau, Kerie Annichiarico, and Felicia Porawski
Historical Facts Wamponog Indians had villages surrounding the five pond complex. Nelson island was used for mining iron ore between 1820-1847. In 1880 there was a trolley route that would transfer people to and from cathedral camp.
Five Pond Complex Long Pond
General Info on Long Pond Formed by glaciers Sub-basin area is 2.79 square miles Pond 7 miles long Largest naturally formed pond in MA Contains 3 islands Part of a 5 pond system North flow Snake river connects long pond and Assawompset pond
?Question? What Is the Water Quality of Long Pond
Land Uses Farmlands Residential areas Wetlands Gravel pits Commercial industry Recreation Boating, fishing, swimming Cathedral camp-day camp
Snake River A main river leading from long pond into Assawompset pond. North end of the river easily accessible off road. Southside is covered by wetlands.
Huckleberry & Clark Shores Converted summer cottages Houses located close to shore Elevation decreases towards pond
Nelson Island Chosen because of water depth and lack of habitation. The island is found on the northern side of the pond. Can be reached by a sandbar on one side of the island or by canoe.
Sandy Point & Marina Permanent housing Marina next to the Eagle s Club Marina on border of Freetown and Lakeville
Hemlock Point & Cathedral Camp Permanent housing Located at the south end of pond Summer activities
Chemical Parameters ph Dissolved oxygen Temperature Reactive phosphorus Nitrogen/nitrates (N/ NO 3 )
Submerged Probe Surface Probe Dissolved Oxygen Normal Values: 5 ppm. Optimal % Saturation Levels: 85%. Diurnal Changes: peak at noon, ultimate low after midnight. On 3/21 there was a disturbance in the diurnal cycle due to heavy rainfall possibly caused by a temp. spike. 12.8 12.7 12.6 12.5 12.4 12.3 12.2 12.1 Submerged DO and Surface DO 180000 190000 200000 210000 220000 Time 230000 10000 20000 30000 40000 50000 100000 60000 110000 70000 120000 80000 130000 90000 140000 150000 160000 170000 180000 190000 200000 210000 220000 230000 10000 20000 30000 40000 50000 100000 60000 110000 70000 120000 80000 130000 90000 140000 150000 160000 170000 180000 190000 200000 210000 220000 230000 10000 20000 30000 40000 50000 Time Sub DO mg/l 13 Surface 12.5 DO mg/l 12 11.5 11 10.5 10 9.5 9
Submerged Temp. Surface Temp. Temperature 7.2 6.2 5.2 4.2 3.2 2.2 1.2 0.2-0.8 Temperature Submerged vs. Surface Minisonde Probe Long Pond Time (hrs) HHMMSS 180000 Time 190000 200000 210000 220000 2300000 10000 20000 30000 40000 50000 60000 70000 100000 80000 110000 90000 120000 130000 140000 150000 160000 170000 180000 190000 200000 210000 220000 2300000 10000 20000 30000 40000 50000 60000 70000 100000 80000 110000 90000 120000 130000 140000 150000 160000 170000 180000 190000 200000 210000 220000 2300000 10000 20000 30000 40000 7.2 7 6.8 6.6 6.4 6.2 6 5.8 SubmergedTemp øc Surface Temp øc 5.6 No stratification (which would indicate spring turn-over) was recorded with the Minisonde probe Submerged probe was recovered after 18 hours Samples taken 3/20/01-3/23/01
Reactive Phosphorus Normal range:.01-.05 mg/l Results are all within normal range Consistently low values on 3/28 due to lag-time present after 4 inch rainstorm on 3/21/01-3/22/01
Nitrogen/Nitrates Normal concentrations: 0.1-2.0 mg/l Spikes occur only at Clark Shores Possible Title V problems Same dilution effect as RP due to rain
Fecal Coliform Bacteria Known as Microscopic organisms that live in waste materials or the intestines of warm-blooded animals * Able to multiply rapidly * In winter months fecals are dormant * Can die in extreme temperatures * Counts cannot be predicted
A: Filtering funnel B: 50mm sterile petri dishes w/pad C: Glass breaker D: Syringes
Colonies Results For Fecals 250 200 150 100 50 0 Fecal Coliform Analysis 4/18/01 1 1 215 211 1 1 Chruchill Chruchill Clark Clark Huckleberry Huckleberry Number of Fecal Coliform Bacteria counted/100mg/l ~ Drinking water must contain no colonies ~ Swimming or Recreation can contain up to 200 colonies ~ Boating or Fishing can contain up to 1000 colonies
1977 Clark Shores 1988 Year 160 Year 249 Seasonal 230 2000 Seasonal 141 Year 261 Seasonal 129
Conclusion: Overall parameter levels are consistent with normal values No evidence of spring turnover Very high nitrate and fecal coliform counts in the Clark Shores area. Special thanks to: Kim McCoy, Dr. Curry and Bridgewater State College. And also the Lakeville Fire Department.