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Lake Erie North Shore Watershed Plan - Niagara Peninsula ...

Lake Erie North Shore Watershed Plan - Niagara Peninsula ...

LAKE ERIE NORTH SHORE

LAKE ERIE NORTH SHORE WATERSHED PLAN 2. Lakeshore Road East (WDMa-2): This section of watercourse is managed as a municipal drain; Wignell Drain. It has been channelized and lacks any depositional features along the stream bed which indicates little flow diversity within the channel. Bank instability is present in the form of fallen vegetation on the left bank. There are also areas where the lawn is mowed right to the edge of the channel. The lack of large woody vegetation limits the canopy cover. Duckweed was noted during a site visit in 2008. Relatively deep unconsolidated sediment is deposited along the channel bed. Few to no pools were present along the streambed but there is stagnant water present in some areas. Recommendations for this site include not grading the channel banks too steep during the dredging process so that deep rooted vegetation can become established along the banks and stabilize the soil. Water quality should continue to be monitored in this watershed. Monitoring the accumulation of sediment along the channel bed can be done by the use of sediment traps throughout the watercourse. Alternatives to traditional drainage design, such as wetland creation, floodplain development, and increasing channel curvature should also be considered. All recommendations should be discussed with the Drainage Superintendent. 3. Snider Road near Lakeshore Road (WDMa-3): This section of watercourse is managed as a municipal drain; Wignell Drain. It has been channelized and lacks any depositional features along the stream bed which indicates little flow diversity within the channel. Bank instability is present in the form of bare soil extending up the bank. A bank protection structure exists along the right bank of the channel. This structure consists of concrete blocks laid on top of each other forming a wall. The lack of large woody vegetation in the buffer zone impacts habitat and canopy cover over the channel. Few to no pools were present along the streambed but there is stagnant water present in some areas. Relatively large amounts of duckweed and algae were noted during a site visit in 2008. An oily sheen on the water surface was also identified. Possibly a gulley/rill exist along the watercourse. Recommendations for this site include not grading the channel banks too steep during the dredging process so that deep rooted vegetation can become established along the banks and stabilize the soil. Water quality should continue to be monitored in this watershed. Projects to prevent and limit further development of rills adjacent to the watercourse should be implemented. Some examples include grassed waterways, chute spillways, tile drainage outlets, and proper tillage and cropping practices (OMAFRA, 1997a, and OMAFRA, 1997b). Alternatives to traditional drainage design, such as wetland creation, floodplain development, and increasing channel curvature should also be considered. An assessment should be completed on whether or not the concrete block wall can be replaced with a soil bio-engineered structure to increase habitat. All recommendations should be discussed with the Drainage Superintendent. 4. 4. Snider Road (WDMb): This section of watercourse is managed as a municipal drain; Wignell Drain. It has been channelized and lacks any depositional features along the stream bed which indicate little flow diversity within the channel. Algae, duckweed, and areas of dense in-channel vegetation were noted during a site visit in 2008. Turbid water was also noted in the upstream section of this reach. Width of the channel and the lack of large woody vegetation in some areas impact the amount of canopy cover over the channel. Few to no pools were present along the streambed but stagnant water is present throughout. Small tributaries and/or possibly gullies/rills exist along the watercourse. Old bridge abutments are present and the abutments make the channel narrower than the other parts of the channel. Erosion is present around woody vegetation, as well as the bridge abutments. Relatively deep unconsolidated sediment is deposited along the stream bed at this study site. Recommendations for this site include not grading the channel banks too steep during the dredging process so 190

LAKE ERIE NORTH SHORE WATERSHED PLAN that deep rooted vegetation can become established along the banks and stabilize the soil. Increasing the amount of large woody vegetation adjacent to the channel would provide more canopy cover over the watercourse. Water quality should continue to be monitored in this watershed. Monitoring the accumulation of sediment along the channel bed can be done by the use of sediment traps throughout the watercourse. Alternatives to traditional drainage design, such as wetland creation, floodplain development, and increasing channel curvature should also be considered. Projects to prevent and limit further development of rills adjacent to the watercourse should be implemented. Some examples include grassed waterways, chute spillways, tile drainage outlets, and proper tillage and cropping practices (OMAFRA, 1997a, and OMAFRA, 1997b). All recommendations should be discussed with the Drainage Superintendent. 5. Snider Trail (WDMc): This section of watercourse is managed as a municipal drain; Michener Drain M-2. It has been channelized and lacks any depositional features along the stream bed which indicate little flow diversity within the channel. Bank instability is present in the form of undercut banks and slumping. In the upstream section of this field site there appears to be a terrace within the channel. Due to the vegetation within and adjacent to the channel, it is difficult to confirm whether or not this is a terrace or an area of slump sediment. Algae, duckweed, and areas of dense in-channel vegetation were noted during a site visit in 2008. Relatively deep unconsolidated sediment is deposited along the channel bed. Few to no pools were present along the streambed but there is stagnant water present in some areas. A small buffer width with a lack of large woody vegetation exists on either side of the channel due to an agricultural field and the Friendship Trial. This impacts the canopy cover over the channel. Measurements taken at channel cross sections would indicate that the watercourse at this field site has moderate entrenchment which results in flood waters having limited to no access to the floodplain. Therefore, the energy within the flow is contained in the channel. Recommendations for this site include not grading the channel banks too steep during the dredging process so that deep rooted vegetation can become established along the banks and stabilize the soil. The presence of bank slumping usually indicates that vegetative roots are too shallow to stabilize the bank. Increasing the amount of large native woody vegetation adjacent to the channel would provide more canopy cover over the watercourse. Water quality should continue to be monitored in this watershed. Monitoring the accumulation of sediment along the channel bed can be done by the use of sediment traps throughout the watercourse. Alternatives to traditional drainage design, such as wetland creation, floodplain development, and increasing channel curvature should also be considered. All recommendations should be discussed with the Drainage Superintendent. 6. Lorraine Road (WDMC-2): This section of watercourse is managed as a municipal drain; Michener Drain M-2. It has been channelized and lacks any depositional features along the stream bed which indicate little flow diversity within the channel. In some areas there is relatively deep unconsolidated sediment deposited along the channel bed. Few to no pools were present along the streambed but there is stagnant water present throughout the study site. The vegetated buffer width is small in various locations along the watercourse. Recommendations for this site include increasing the size and diversity of native plant vegetation within the buffer zone if possible. This will provide cover and habitat for fish, insects, and invertebrates along the watercourse. It will also provide a filter for sediment and chemicals that may enter the channel from runoff of fields and roads. Monitoring the accumulation of sediment along the channel bed can be done by the use of sediment traps throughout the watercourse. All recommendations should be discussed with the Drainage Superintendent. 191

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