| A Watershed Analysis of Long Pond South |
| Implications for Water Quality and Land-Use Management | |
| Part II |
| GIS and Erosion Models |
| Jessica Harold |
| Layers and Maps |
| Erosion Potential Model |
| Erosion | ||
| Displacement of soil and organic matter | ||
| Causes | ||
| Soil type, slope, and land-use | ||
| Effects | ||
| Algal blooms, harmful to organisms | ||
| Creating the Erosion Potential Model |
| Use soil type, slope, and land-use | ||
| Rate each on a scale of 1 to 9 or 0-9 | ||
| Weighted overlay | ||
| Weighted average | ||
| Soil type – 40% | ||
| Slope – 30% | ||
| Land-use – 30% | ||
| Erosion Potential Model |
| Erosion Impact Model |
| The impact of erosion depends on its proximity to the lake and tributaries | ||
| A new layer was created for proximity to the lake and proximity to tributaries | ||
| Layer was rated from 1 to 9 | ||
| Weighted overlay | ||
| Erosion potential – 50%, Proximity – 50% | ||
| Erosion Impact Model |
| Roads and Water Quality |
| Anna Birnberg |
| Roads and Lake Water Quality |
| Roads have the potential to contribute to water quality degradation | |
| Development leads to increased roads | |
| Role of maintenance |
| Proper Drainage: Essential in Preventing Pollution |
| Examples of Culverts |
| The Road Survey |
| Paved versus non-paved roads | |
| ÒProblem spotsÓ | |
| House count |
| Results of the Road Survey |
| 52 roads in LPS watershed | ||
| 2 state roads | ||
| 8 town | ||
| 42 camp roads | ||
| 90.3 acres of road area | ||
| 9.1 acres state | ||
| 42.7 acres town | ||
| 38.4 acres camp roads | ||
| Camp roads make up | ||
| over 40% | ||
| Results of the Road Survey |
| Camp Roads: | |
| 16.7% Good (7 roads) | |
| 35.7% Acceptable (15) | |
| 16.7% Fair (7) | |
| 31.0% Poor (13) |
| Results of the Road Survey |
| Road Survey: Conclusions |
| LPN has more ÒgoodÓ roads; LPS has more poor quality roads | |
| Poor condition of ditches and culverts | |
| Over 40% of road area is camp roads, and nearly 50% of camp roads are in fair or poor condition |
| Septic and Buffer Survey |
| Rosalind Becker |
| Septic Systems |
| Contribution to phosphorus loading | ||
| Leaching effluent | ||
| Shoreline concerns | ||
| System age concerns | ||
| 1974 Regulations | ||
| Site evaluations | ||
| Installation restrictions | ||
| Septic Survey Questions |
| How many septic systems are in the watershed? | |
| What is the relative age of septic systems in the watershed? | |
| Where do we expect future development? |
| Septic Survey Methods |
| House counts | ||
| Shoreline survey | ||
| Road survey | ||
| Interviews with town officials | ||
| Review of town documents | ||
| Septic Survey Results |
| 365 houses | ||
| 126 along shoreline | ||
| 239 non-shoreline | ||
| Replacement of systems | ||
| Restricted development | ||
| Areas of potential development | ||
| Septic Suitability Model |
| Importance of soils and slope | ||
| USGS Criteria | ||
| Permeability | ||
| Mean depth to bedrock | ||
| Erodibility | ||
| Nutrient absorption capacity | ||
| Septic Suitability Model |
| Buffer Survey |
| Importance of buffers | ||
| Protect soils from erosion | ||
| Remove nutrients, trap sediments | ||
| Evaluation parameters | ||
| Percent vegetated buffer | ||
| Buffer depth | ||
| Slope rating | ||
| Buffer Survey |
| Most lots had an acceptable score | |
| No lots with a perfect score | |
| Other observations |
| North Basin vs. South
Basin Buffer Quality |
| Septic System and Buffer Conclusions |
| Replacement of grandfathered systems | |
| Areas of likely development | |
| Range of septic suitability | |
| Acceptable buffer conditions |
| Future Projections |
| Eva Gougian |
| Long Pond South Watershed: 2010 to 2030 |
| Population Projections |
| Developable land | |
| Subdivisions | |
| Increase in year-round residences |
| Development Projections |
| Land-Use Projections |
| Regenerating land | |
| Wetlands | |
| Agricultural land | |
| High-impact development | |
| 492 acres of mixed forest converted to residential land |
| Phosphorus Budget Projections |
| Recommendations and Conclusions |
| Kristyn Loving |
| Recommendations |
| Water quality | |
| Recreation | |
| Roads | |
| Buffer Strips | |
| Septic Systems | |
| Development |
| Conclusions |
| Long Pond South is in good shape | |
| Educating the public is important | |
| Foster close collaboration with neighboring lake associations |
| Acknowledgements |
| Roy Bouchard | |
| Maine Department of | |
| Environmental Protection | |
| Russell Cole | |
| Department of Biology, Colby College | |
| Russell Danner | |
| Maine Department of Inland | |
| Fisheries and Wildlife | |
| Dale Finseth | |
| Kennebec County Soil and | |
| Water Conservation District | |
| David Firmage | |
| Department of Biology, Colby College | |
| Gary Fuller | |
| Code Enforcement Officer, | |
| Belgrade Municipal Office | |
| Tracey Greenwood | |
| Department of Biology, Colby College | |
| Manuel Gimond | |
| GIS & Quantitative Analysis Specialist, Colby College | |
| David Halliwell | |
| Maine Department of | |
| Environmental Protection | |
| Jen Jespersen | |
| FB Environmental | |
| D. Whitney King | |
| Department of Biology, Colby College | |
| Richard Marble | |
| Code Enforcement Officer, | |
| Mount Vernon Municipal Office | |
| William Najpauer | |
| Code Enforcement Officer, | |
| Rome Municipal Office | |
| John Rice | |
| and the staff of Castle Island Camps |
| Questions? |