| Understanding the Factors
Affecting Water Quality in the Togus Pond Watershed |
| Presentation Overview |
| An Introduction to our Study
of Togus Pond |
| Background Overview |
| Study Objectives |
| Value of Maine Lakes |
| Lake Characteristics |
| Lake Formation |
| Land Use History |
| Water Quality |
| Lake Turnover |
| "Eutrophication" |
| Aquatic Flora & Fauna |
| Aquatic Flora and Fauna |
| An Assessment of Water Quality |
| Water Analysis Overview |
| Sample Sites |
| Physical Tests |
Dissolved Oxygen |
| Historical DO |
| Anoxic Volume of the Lake |
Temperature |
| Transparency |
| Historical Transparency |
| Other Physical Tests |
| Slide 26 |
| Chemical Tests |
pH |
| Hardness |
| Other Chemical Tests |
| Slide 31 |
Biological Tests Chlorophyll-a |
| Chlorophyll-a |
| Fecal Coliform |
| Water Analysis Conclusions |
| Land Use Analysis of the Togus Pond Watershed |
| Land Use Assessment Overview |
| Land Use Assessment |
| Geographic Information System (GIS) |
| GIS Land Use Analysis |
| Aerial Photography |
| Georeferencing |
| Togus Pond Watershed 1954 |
| Togus Pond Watershed 2002 |
| Land Use Classifications |
| Residential and Commercial/Municipal |
| Cleared and Old Field |
| Agriculture and Wetland |
| Drawing Polygons |
| Digitizing Land Use Types |
| Land Use Maps |
| Water Quality Impacts |
| Water Quality Impacts |
| Water Quality Impacts |
| Water Quality Impacts |
| Water Quality Impacts |
| Water Quality Impacts |
| Land Use Change: 1954 to 2002 |
| GIS Modeling |
| Erosion Potential Model |
| Slide 61 |
| Using the Erosion Potential Model |
| Septic Suitability Model |
| Slide 64 |
| Using the Septic Suitability Model |