All Layers and Tables (Overland_Flow

Layers:

Layer: Overland Flow Paths (0)

Name:

Display Field:

Type:

Geometry Type:

Description:

Overland flow paths (OLFPs) were re-mapped for the Auckland region in 2019 by WSP using LiDAR data flown in 2016 and 2017. The OLFPs were re-mapped using a 1m DEM formed from ground points. Nearly 6,000 manual adjustments to the DEM were used to map the overland flow paths in flat and depression areas.

OLFPs were identified using GIS techniques and are not based on hydraulic modelling.

Peak flow rates and runoff volumes for 2-, 10- and 100-year annual recurrence interval (ARI) and 90th and 95th percentile events have been attributed to each overland flow path, following the graphical method outlined in Guidelines for Stormwater Runoff Modelling in the Auckland Region: Technical Publication 108 (TP108). Both the existing scenario (existing imperviousness and rainfall) and the future scenario (future development and rainfall due to climate change) are represented here; two climate change scenarios were considered, viz., temperature increases of 2.1 and 3.8 degrees-C.

The aim of this dataset is to provide a regionally consistent validation tool for runoff calculations and hydraulic modelling to assist consultants, contractors, development engineers, catchment managers and hydraulic modelling staff.

A copy of the full background report can be obtained from the Regional Planning team in Auckland Council’s Healthy Waters department. The data will be updated on an ad hoc basis to align with updates to Auckland Council’s LiDAR data.

Vertical Datum: NZVD1946

Copyright Text:

Min. Scale:

Max. Scale:

Default Visibility:

Max Record Count:

Supported query Formats:

Use Standardized Queries:

Extent:

Drawing Info:

{"renderer":{"type":"uniqueValue","field1":"CatchmentAreaGroup","uniqueValueInfos":[{"symbol":{"type":"esriSLS","style":"esriSLSSolid","color":[0,112,255,255],"width":3.5},"value":"5","label":"Overland Flow Paths - 100ha and above","description":"Overland Flow Paths - 100ha and above"},{"symbol":{"type":"esriSLS","style":"esriSLSSolid","color":[0,112,255,255],"width":2},"value":"4","label":"Overland Flow Paths - 3ha to 100ha","description":"Overland Flow Paths - 3ha to 100ha"},{"symbol":{"type":"esriSLS","style":"esriSLSSolid","color":[0,164,255,255],"width":1.2},"value":"3","label":"Overland Flow Paths - 1ha to 3ha","description":"Overland Flow Paths - 1ha to 3ha"},{"symbol":{"type":"esriSLS","style":"esriSLSDash","color":[0,163,255,255],"width":1.2},"value":"2","label":"Overland Flow Paths - 4000m2 to 1ha","description":"Overland Flow Paths - 4000m2 to 1ha"},{"symbol":{"type":"esriSLS","style":"esriSLSDash","color":[102,153,205,255],"width":1.1},"value":"1","label":"Overland Flow Paths - 2000m2 to 4000m2","description":"Overland Flow Paths - 2000m2 to 4000m2"}],"fieldDelimiter":",","authoringInfo":{"colorRamp":{"type":"multipart","colorRamps":[{"type":"algorithmic","algorithm":"esriCIELabAlgorithm","fromColor":[212,252,207,255],"toColor":[212,252,207,255]},{"type":"algorithmic","algorithm":"esriCIELabAlgorithm","fromColor":[252,179,250,255],"toColor":[252,179,250,255]},{"type":"algorithmic","algorithm":"esriCIELabAlgorithm","fromColor":[252,196,187,255],"toColor":[252,196,187,255]},{"type":"algorithmic","algorithm":"esriCIELabAlgorithm","fromColor":[202,220,252,255],"toColor":[202,220,252,255]},{"type":"algorithmic","algorithm":"esriCIELabAlgorithm","fromColor":[179,250,252,255],"toColor":[179,250,252,255]},{"type":"algorithmic","algorithm":"esriCIELabAlgorithm","fromColor":[252,212,241,255],"toColor":[252,212,241,255]},{"type":"algorithmic","algorithm":"esriCIELabAlgorithm","fromColor":[252,227,179,255],"toColor":[252,227,179,255]},{"type":"algorithmic","algorithm":"esriCIELabAlgorithm","fromColor":[207,189,252,255],"toColor":[207,189,252,255]},{"type":"algorithmic","algorithm":"esriCIELabAlgorithm","fromColor":[180,252,179,255],"toColor":[180,252,179,255]},{"type":"algorithmic","algorithm":"esriCIELabAlgorithm","fromColor":[222,252,179,255],"toColor":[222,252,179,255]},{"type":"algorithmic","algorithm":"esriCIELabAlgorithm","fromColor":[252,179,216,255],"toColor":[252,179,216,255]},{"type":"algorithmic","algorithm":"esriCIELabAlgorithm","fromColor":[252,252,189,255],"toColor":[252,252,189,255]},{"type":"algorithmic","algorithm":"esriCIELabAlgorithm","fromColor":[182,199,252,255],"toColor":[182,199,252,255]}]}}},"scaleSymbols":true,"transparency":0,"labelingInfo":null}

HasZ:

HasM:

Has Attachments:

Has Geometry Properties:

HTML Popup Type:

Object ID Field:

Unique ID Field:

Global ID Field:

Type ID Field:

Fields:

CatchmentAreaGroup (type: esriFieldTypeInteger, alias: Catchment Areas Group, SQL Type: sqlTypeOther, nullable: true, editable: true, Coded Values: [1: 2000m2 to 4000m2], [2: 4000m2 to 1ha], [3: 1ha to 3ha], ... 2 more ...)
OBJECTID (type: esriFieldTypeOID, alias: OBJECTID, SQL Type: sqlTypeOther, length: 0, nullable: false, editable: false)
GlobalID (type: esriFieldTypeGlobalID, alias: GlobalID, SQL Type: sqlTypeOther, length: 38, nullable: false, editable: false)
Shape__Length (type: esriFieldTypeDouble, alias: Shape__Length, SQL Type: sqlTypeDouble, nullable: true, editable: false)

Types:

Field Name: CatchmentAreaGroup
Inherited

CatchmentAreaGroup: 5

Field Name: CatchmentAreaGroup
Inherited

CatchmentAreaGroup: 4

Field Name: CatchmentAreaGroup
Inherited

CatchmentAreaGroup: 3

Field Name: CatchmentAreaGroup
Inherited

CatchmentAreaGroup: 2

Field Name: CatchmentAreaGroup
Inherited

CatchmentAreaGroup: 1

Is Data Versioned:

Has Contingent Values:

Supports Rollback On Failure Parameter:

Last Edit Date:

Schema Last Edit Date:

Data Last Edit Date:

All Layers and Tables (Overland_Flow_Paths)

Layers:

Layer: Overland Flow Paths (0)