05/08/17 - Laserfiche WebLink

Home

City of Ramsey February 12, 2007 Functional Assessment of Wetlands Flood/Stormwater Attenuation 3. – this function is the ability of the wetland to provide flood storage and/or flood wave attenuation. Downstream Water Quality 4. – this function is the ability and opportunity of the wetland to protect valuable downstream recreational waters and potable water supplies by removing sediment from stormwater. Maintenance of Wetland Water Quality 5. – this function is the ability of a wetland to sustain its characteristics based on the quality and quantity of stormwater runoff entering the wetland. Shoreline Protection 6. – this function is evaluated only for those wetlands adjacent to lakes, streams, or deepwater habitats and is rated based on the wetlands opportunity to protect the shoreline. Maintenance of Characteristic Wildlife Habitat Structure 7. – this function is the ability of the wetland to support wildlife in a general sense and is not based on any specific species. Maintenance of Characteristic Fish Habitat 8. – this function is the ability of the wetland to support native fish populations. Maintenance of Characteristic Amphibian Habitat 9. - this function is the ability of the wetland to support amphibian species in a general sense and is not based on any specific species. Aesthetics/Recreation/Education/Cultural 10. – this function is based on the wetland’s visibility, accessibility, and evidence of recreational uses, evidence of human influences, and any known educational or cultural purposes. Commercial Uses 11. – this function is the ability of the wetland to sustain a commercial crop or other commercially-productive uses. Ground Water Interaction 12. – this function determines the most likely type of ground water interaction, i.e. recharge or discharge, or a combination. Additional Evaluation Information Restoration Potential 13. – this function determines the potential for wetland restoration. Sensitivity to Stormwater & Urban Development 14. – this function determines the sensitivity of a wetland to stormwater and urban development and is based on the wetland type and diversity of wetland vegetation. Additional Stormwater Treatment Needs 15. – this function rates the sustainability of the wetland with regard to stormwater discharge and the need for additional stormwater treatment prior to discharge to the wetland. Each wetland function is rated with a numeric index according to the formulas provided in the methodology. The scoring system is from 0.1 to 1.0 signifying low to high, respectively, and a score of 2 signifies a rating of exceptional. Each wetland function receives a functional index score with the following ratings: 3