The District of Maple Ridge Stream Protection Regulation Guidelines. Watermark Technologies Canada

Transcription

1 The District of Maple Ridge Stream Protection Regulation Guidelines Watermark Technologies Canada

2 Outline 1. Overview On Maple Ridge GPS Stream Mapping & Inventory Information System 2. Information System Viewers and GIS 3. Streamside Protection Setback Assessment 4. Stream Integrity Classification Watermark Technologies Canada

3 GPS Stream Mapping And Inventory The District Of Maple Ridge Total Linear Length Of Creeks: 650km Total Length Collected By GPS: 600 km Currently 90% of the tributaries in Maple Ridge have been mapped and inventoried using GPS/GIS technology over the last three years. All of the information collected has been integrated into the Maple Ridge GIS system Watermark Technologies Canada

4 Stream Mapping And Inventory Project: GPS Stream Survey: 300km Completed

5 Linear Creek Interpretation - Profile Of a Creek Section #Y N Section umber 34 Crew: Stott Date: State: Natural Flow Type: Riffle/Pool Wetted Width: 1.5m Wetted Depth: m Bank Width: 2.0m Bank Depth: 2.0m Gradient: 3 Percent # Substrate: Clay 30% "F Sands 25% Gravel 30%, Cobbles 15% Vegetative Cover: 50% # LOD/LWD Level: Low Undercut Banks: Yes Riparian Extent: < 5m left bank > 15m right bank Riparian Type: Shrubs left bank bank Mixed Forest rt Invasive Species: > 75% Comment: None Photo: R10P23 #Y b # # # # #Y b Ñ# %a %a #Y #Y %a %a # #Y %a %a #Y # # # # b r #Y W S DMR 1994 Streams #Y Wildlife01.shp "F Fish01.shp %a Culverts02.shp # Outlets01.shp Ñ Naturalobs01.shp b Problemflag01.shp r Pollution01.shp #Y Waterbody02.shp # Pools01.shp #Y Bankinfra01.shp # Streaminfra01.shp Ponds E Meters

6 Point Feature Interpretation N $Z W E #Y S $Z #Y ÊÚ %a %a ÊÚ Fish Observed #Y W ater Intake $Z Severe Erosion #Y Bankinfra01.shp %a Culverts GPS Creek %a %a #Y %a %a #Y %a %a%a Meters

7 Watercourse Information System Integrated Approach 1. Feature Locations 2. Data Base Queries 3. Digital Photo Archives 4. Management Tool 5. Analysis And Assessment Tools, Geo-modelling, and Virtual Simulation Watermark Technologies Canada

8 Applications Of GPS Stream Mapping Development Permits 1. Stream Location Land Use Planning Depends Heavily On The Location Of Streams For Guide Plan Development Schedule E : OCP Amendment Watermark Technologies Canada

9 Supports OCP Schedule E (Watercourses Designated For Special Treatment )

10 Environmental Management and Development Application Review Used by the Environmental Technician for: Public Information Requests Development Application Review Enforcement (Bylaw, Policy, Water Quality, Senior Government Regulations ) Permitting of Soil, and Tree Bylaws In-Stream Work Approval (District and Public) Habitat Enhancement (District Compensation projects, Stewardship group Initiatives ) Emergency Response Drainage Investigations Mapping Requests by the Health Region, DFO, MoWLAP...

11 Subject Map

12 SIS Viewer Demonstration

13 Maple Ridge Streamside Protection And Setback Assessment Project Based on Provincial (SPR) Guidelines Criteria used for establishing setbacks: 1. Fish Presence and Fish Habitat 2. Permanence of Streams 3. Continuous and Abundant Riparian Watermark Technologies Canada

14 Maple Ridge Streamside Protection And Setback Assessment Project Challenges For Applying SPR Directives: 1. Ambiguous Guidelines For The Determination of Fish Presence 2. How To Determine Permanence 3. How To Determine Top Of Bank Watermark Technologies Canada

15 1. Fish Presence and Habitat Step One. Fish Presence And Existing Habitat FISH PRESE CE EVALUTATIO GPS Field Observation Fish Enumeration Using G-Traps Historical Records From Hatchery DFO FISS database Community Stewardship Files 1.1 Evidence of fish rearing or spawning. Yes, goto step 2.1 No, goto step Fish Rearing And Spawning Potential Proceed To Step Existing habitat for fish rearing or spawning Yes, goto step 2.1 No, then setback < 30 FISH HABITAT EVALUATIO GPS Habitat Verification GIS Stream Mapping Assessment Absence of a fish sighting does not necessarily mean there are no resident fish or fish utilizing the stream segments, it only means they have not been observed during the surveys

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17 Fish Presence and Habitat Bio-Physical Queries to Determine Existing Fish Habitat Stream Feature Query Criteria Gradient Equal To or LT (<) 15% Hydrological Regime Equal To Riffle/pool or Run/pool Channel Width Equal To or GT (>) 0.5 metre Channel Depth Equal To or GT (>) 0.5 metre Substrate Composition Equal To or GT (>) Gravels 10% Stream Vegetative Cover Equal To or GT (>) 15 percent Large Organic Debris Equal To Moderate to High Undercut Banks Equal To Presence Field crew are observing factors such as stream complexity, shade, food, compaction levels and manmade or natural obstructions for every stream segment in order to determine integrity of fish habitat.

18 2. Creek Permanence Step Two. Creek Segment Flows And Creek Permanence 2.1 Creek Flows Permanent or flows > 6 months a year Yes, goto step 3 No or Unknown, goto step Creek Segment Flows And Permanence 2.2 Creek Flows Ephemeral and flows < 6 months a year Yes, creek = non-permanent & setback = 15m or less Permanence Criteria: Ephemeral Streams were considered permanent unless the following variables were found: Riparian Buffer < or > 15m; and Creek Channel size < or > 1m Isolated or Connected to other watercourses, wetlands or ponds Watermark Technologies Canada

19 3. Riparian Abundance Step Three. Riparian ContinuityAnd Abundance 3.1 Riparian buffer > 30m for majority of both banks Yes, goto 3.2 No, goto Riparian Buffer 15m - 30m for majority of both banks Yes, setback = 15m No, goto Riparian Continuity 3.2 Fish habitat is present and flows are permanent Yes, setback = 30m No, setback = 15m or less Riparian Abundance: GPS Field Verification Ortho Photo Interpretation DTM GIS Modelling GIS Buffer Analysis Riparian buffer less < 15m for majority of both banks with permanent structures Yes, setback = 5-15m Watermark Technologies Canada

20 Stream Bank Assessment Combines stream information with other types of information (slope, transportation, urban areas )

21 District of Maple Ridge Streamside Setback Mapping

22 Watercourse Information System Stream Integrity Classification

23 Benefits of Riparian Buffer Zones

24 Stream Integrity Classification Criteria 1. bio-physical stream characteristics 2. riparian characteristics 3. infrastructure characteristics 4. erosion, pollution or disturbance areas 5. required enhancement or rehabilitation Watermark Technologies Canada

25 District of Maple Ridge Stream Integrity Classification