Description: The natural and manmade linear features which occur on waterbodies and/or watercourses and may pose hazards or impediments to water flow and/or navigation.
Description: 'Constructed Drains' are watercourses in the form of ditches, natural watercourses that have been modified to improve drainage, or buried tile systems.
Copyright Text: South Nation Conservation, Rideau Valley Conservation Authority, Mississippi Conservation, Ontario Ministry of Agriculture, Food, and Rural Affairs
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Description: PL_ES_Watercourse feature set explains the connectivity of the surface flow through Ottawa and contiguous watershed areas. The major river systems found throughout Ottawa are the Rideau, South Nation, Mississippi, and Ottawa Rivers, and the four major tributaries are the Carp, Jock and Castor Rivers and the Bear Brook. The PL_ES_Watercourse feature set is a consolidation of the two data sources. The first data source is the watercourse mapping maintained by the Ministry of Natural Resources and Forestry Ontario as part of the Hydrology Network (OHN) OHN_Watercourse feature. The second set is the constructed drain records kept by Ontario Ministry of Agriculture, Food, and Rural Affairs (OMAFRA) available through Land Information Ontario (LIO) as the Constructed_Drain feature set, . The origin of of the OHN_Watercourse is the 1988 Ontario Base mapping and available through LIO’. The PL_ES_Watercourse feature set has been reviewed and updated based modelled flow paths created from high resolution (LiDAR derived) Digital Elevation Model (which was generated from 2012 to 2015), structures (culverts and bridge) information, and aerial images ranging from 1991 to 2014.The watercourse features are categorized intro 11 segment types:1 – Natural - exhibits sinuosity and general characteristics of a natural watercourse 2 – Modified - exhibits characteristics including straigthened and other mofications to watercourses3 - Passage through structure - includes flow paths through culverts and under bridges, may not include small structures that do not affect the flow path4 – Piped - open water courses are noted up and downstream of piped sections and characteristics indicate connectivity - typically through agricultural land or in a few cases large stormwater pipes connecting open watercourses: notably Pinecrest and Voyager Creeks5 – Presence not apparent – previously mapped and no longer evident - typically representing the mapping of a municipal drain in the Engineers Report (a Legal Document)6 – Swale - no defined banks but clear surface feature where flows are funneled7 - Ditch - interpreted as a created feature that would not otherwise exist i..e. upstream catchment areas are insufficient to maintain a defined watercourse with banks. Included due to being previously mapped or seen as providing notable drainage connectivity. Strahler number of 0 has been assigned.8 – Waterbody flow path - identifies connectivity between upstream and downstream watercourse. – estimated flow path through a water body9 – Wetland flow path – a general direction of flow through a wetland based on surface analysis. Note that flows through wetlands are dispersed and can vary with season / time. Note also that LiDAR response from water / vegetation surfaces are poor / irregular / noisy10 – Creek to river connector – a link providing connection from a stream to the centreline of a river.99 – UnclassifiedOfficial and Drain Names: there are a series of names for conformance to MNRF Official Watercourse Names and OMAFRA Official Drain Names. MNR Official Watercourse Name: OfficialName_WatercourseOMAFRA - OfficialName_Drain.Since the Official Drain Names often have multiple names for a drain with branch names included an additional field has been added with the primary or root drain name: Drain_Name and Drain_Branch_Name.All attributes from the Constructed Drain features have been incorporated into the new watercourse features. The original watercourse-drain features may have been edited based on the new LiDAR and aerial interpretations preserved while updating the feature data set.Strahler Number - calualated using ArcHydro with Segement Types = Ditch and adjacent structures excluded.
Name: Flood Extent - 1 in 5 Year Event / Plaines inondables - une fois tous les 5 ans
Display Field: CON_AUTH
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: The Engineered Flood Lines for the Rideau Valley, South Nation and Mississippi Valley Conservation Authorities respective areas of Jurisdiction
Name: Flood Extent - 1 in 20 Year Event / Plaines inondables - une fois tous les 20 ans
Display Field: CON_AUTH
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: The Engineered Flood Lines for the Rideau Valley, South Nation and Mississippi Valley Conservation Authorities respective areas of Jurisdiction
Name: Flood Extent - 1 in 50 Year Event / Plaines inondables - une fois tous les 50 ans
Display Field: CON_AUTH
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: The Engineered Flood Lines for the Rideau Valley, South Nation and Mississippi Valley Conservation Authorities respective areas of Jurisdiction
Name: Flood Extent - 1 in 100 Year Event / Plaines inondables - une fois tous les 100 ans
Display Field: CON_AUTH
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: The Engineered Flood Lines for the Rideau Valley, South Nation and Mississippi Valley Conservation Authorities respective areas of Jurisdiction
Name: Labels for Evaluated Wetlands / Étiquettes pour les milieux humides évalués
Display Field: SOURCE_NAME
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: The Wetland Unit data class provides the spatial representation and basic information for all wetlands in Ontario. The attributes identify which wetlands have been evaluated and of those which ones have been designated undder Wetland_Signficance as:- Evaluated-Provincial- Evaluated-Other- Not evaluated per OWESHuntley updated 201208 Manion Corners updated 201210
Copyright Text: Ontario Ministry of Natural Resources
Description: The Wetland Unit data class provides the spatial representation and basic information for all wetlands in Ontario. (Last updated 2015-04-22 most recent 'effective date' 2013-11)All wetland cover is presented with two major subcategoriesa. Unevaluated / Estimated- the presence of wetlands were estimated using a number of sources including topography, soils and geology - assume not field /photography verified- some are very good, some areas are wrong – use with caution and limit display with disclaimer- the value in the field WETLAND_SIGNIFICANCE for unevaluated wetlands is :‘Not evaluated per OWES’b. Evaluated - based on significant investigation including field study & or aerial interpretation- boundaries do change year-to-year dependant on wet/dry years but the existence can be assumed right until proven otherwise- results of evaluation are recorded under the value for the field WETLAND_SIGNFICANCE for evaluated wetlands are either:Evaluated-ProvincialEvaluated-OtherHuntley updated 201208 Manion Corners updated 201210 Kizel Drain Wetland Complex Updated 201207Goulbourn Wetland Compex updated 201307
Copyright Text: Ontario Ministry of Natural Resources
Description: The Wetland Unit data class provides the spatial representation and basic information for all wetlands in Ontario. (Last updated 2015-04-22 most recent 'effective date' 2013-11)All wetland cover is presented with two major subcategoriesa. Unevaluated / Estimated- the presence of wetlands were estimated using a number of sources including topography, soils and geology - assume not field /photography verified- some are very good, some areas are wrong – use with caution and limit display with disclaimer- the value in the field WETLAND_SIGNIFICANCE for unevaluated wetlands is :‘Not evaluated per OWES’b. Evaluated - based on significant investigation including field study & or aerial interpretation- boundaries do change year-to-year dependant on wet/dry years but the existence can be assumed right until proven otherwise- results of evaluation are recorded under the value for the field WETLAND_SIGNFICANCE for evaluated wetlands are either:Evaluated-ProvincialEvaluated-OtherHuntley updated 201208 Manion Corners updated 201210 Kizel Drain Wetland Complex Updated 201207Goulbourn Wetland Compex updated 201307
Copyright Text: Ontario Ministry of Natural Resources
Description: Water bodies are polygon features (natural and manmade) that describe various realizations of surface water at a medium scale of 1:10K in Southern Ontario.