HomeMy WebLinkAboutWatercourse Protection Mapping PresentationThe District of Maple RidgeStream Protection Regulation GuidelinesWatermark Technologies Canada
Outline1. Overview On Maple Ridge GPS Stream Mapping & Inventory Information System2. Information System Viewers and GIS3. Streamside Protection Setback Assessment4. Stream Integrity ClassificationWatermark Technologies Canada
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 systemWatermark Technologies Canada
Stream Mapping And Inventory Project: GPS Stream Survey: 300km Completed
#####Y#####Y#YrbÑ%a%a"F#YPonds#Streaminfra01.shp#YBankinfra01.shp#Pools01.shp#YWaterbody02.shprPollution01.shpbProblemflag01.shpÑNaturalobs01.shp#Outlets01.shp%aCulverts02.shp"FFish01.shp#YWildlife01.shpDMR 1994 StreamsNEWSLinear Creek Interpretation -Profile Of a Creek SectionSection umber34Crew: StottDate: 01242000State: NaturalFlow Type: Riffle/PoolWetted Width: 1.5mWetted Depth: 0.01 - 0.5mBank Width: 2.0mBank Depth: 2.0mGradient: 3 Percent Substrate:Clay 30% #####Y#Y##Y#Yrbb%a%a%a%a"FPonds70 0 70 140 210 280 MetersSubstrate:Clay 30% Sands 25% Gravel 30%, Cobbles 15%Vegetative Cover: 50%LOD/LWD Level: LowUndercut Banks: YesRiparian Extent: < 5m left bank> 15m right bankRiparian Type: Shrubs left bankMixed Forest rt bankInvasive Species: > 75%Comment:NonePhoto: R10P23
Point Feature Interpretation%a%a$Z#YÊÚ%aCulverts#YBankinfra01.shp$ZSevere Erosion#YWater IntakeÊÚFish ObservedNEWS%a%a%a%a%a%a%a#Y#Y$Z#YÊÚGPS Creek%aCulverts200 0 200 400 Meters
Watercourse Information SystemIntegrated Approach1. Feature Locations2. Data Base Queries 3. Digital Photo Archives3. Digital Photo Archives4. Management Tool5. Analysis And Assessment Tools, Geo-modelling, and Virtual SimulationWatermark Technologies Canada
1. Stream Location• Land Use Planning Depends Heavily On The Location Of Streams For Guide Plan Applications Of GPS Stream Mapping Development PermitsThe Location Of Streams For Guide Plan Development –Schedule E : OCP AmendmentWatermark Technologies Canada
Supports OCP Schedule E (Watercourses Designated For Special Treatment )
Environmental Management and Development Application ReviewUsed 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...
Subject Map
SIS Viewer Demonstration
• Based on Provincial (SPR) Guidelines• Criteria used for establishing setbacks:Maple Ridge Streamside ProtectionAnd Setback Assessment Project1. Fish Presence and Fish Habitat2. Permanence of Streams3. Continuous and Abundant RiparianWatermark Technologies Canada
• Challenges For Applying SPR Directives:1. Ambiguous Guidelines For TheMaple Ridge Streamside ProtectionAnd Setback Assessment Project1. Ambiguous Guidelines For TheDetermination of ‘Fish Presence’2. How To Determine ‘Permanence’ 3. How To Determine ‘Top Of Bank’Watermark Technologies Canada
1. Fish Presence and HabitatStep One. Fish Presence And Existing Habitat1.1 Evidence of fishrearing or spawning.1.2 Existing habitat forfish rearing or spawning1. Fish Rearing And Spawning PotentialFISH PRESECE EVALUTATIO•GPS Field Observation•Fish Enumeration Using G-Trapsrearing or spawning.Yes, goto step 2.1No, goto step 1.2fish rearing or spawningYes, goto step 2.1No, then setback < 30Proceed To Step 2Absence 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•Historical Records From Hatchery•DFO FISS database•Community Stewardship FilesFISH HABITAT EVALUATIO•GPS Habitat Verification•GIS Stream Mapping Assessment
Fish Presence and HabitatBio-Physical Queries to Determine Existing Fish HabitatStream Feature Query Criteria•GradientEqual To or LT (<) 15%•Hydrological RegimeEqual To Riffle/pool or Run/pool •Channel WidthEqual To or GT (>)0.5 metre •Channel WidthEqual To or GT (>)0.5 metre •Channel DepthEqual To or GT (>) 0.5 metre•Substrate CompositionEqual To or GT (>) Gravels 10%•Stream Vegetative CoverEqual To or GT (>) 15 percent•Large Organic DebrisEqual To Moderate to High•Undercut BanksEqual 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.
2. Creek Permanence2. Creek Segment FlowsStep Two. Creek Segment Flows And Creek PermanencePermanence Criteria:•Ephemeral Streams were considered permanent unless the 2.1 Creek Flows Permanentor flows > 6 months a yearYes, goto step 3No or Unknown, goto step 2.22.2 Creek Flows Ephemeraland flows < 6 months a yearYes, creek = non-permanent& setback = 15m or less2. Creek Segment FlowsAnd Permanenceconsidered 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 pondsWatermark Technologies Canada
3. Riparian Abundance Step Three. Riparian ContinuityAnd Abundance Riparian Abundance:•GPS Field Verification3. Riparian Continuity•Ortho Photo Interpretation•DTM GIS Modelling•GIS Buffer Analysis3.1.2 Riparian bufferless < 15m for majority of both bankswith permanent structuresYes, setback = 5 - 15m3.1.1 Riparian Buffer15m - 30m for majority of both banksYes, setback = 15mNo, goto 3.1.23.1 Riparian buffer> 30m for majority of both banksYes, goto 3.2No, goto 3.1.13.2 Fish habitat is present and flows are permanentYes, setback = 30mNo, setback = 15m or lessWatermark Technologies Canada
Stream Bank Assessment•Combines stream information with other types of information (slope, transportation, urban areas…)
District of Maple RidgeStreamside Setback Mapping
Watercourse Information SystemStream Integrity Classification
Benefits of Riparian Buffer Zones
1. bio-physical stream characteristics2. riparian characteristics3.infrastructure characteristicsStream Integrity Classification Criteria3.infrastructure characteristics4. erosion, pollution or disturbance areas 5. required enhancement or rehabilitationWatermark Technologies Canada
District of Maple RidgeStream Integrity Classification