Layers:

Layer: Water Quality Index Grades (4)

Name: Water Quality Index Grades

Display Field: SiteName

Type: Feature Layer

Geometry Type: esriGeometryPoint

Description: State of the Environment Canterbury River Water Quality Index Monitoring Sites

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Layer: Water Quality Index Grades (0)

Name: Water Quality Index Grades

Display Field: SiteName

Type: Feature Layer

Geometry Type: esriGeometryPoint

Description: State of the Environment Canterbury River Water Quality Index Monitoring Sites

Copyright Text:

Default Visibility: false

MaxRecordCount: 1000

Supported Query Formats: JSON, geoJSON, PBF

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YMin: 5023574
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Layer: Trophic Level Index Grades (3)

Name: Trophic Level Index Grades

Display Field: Lake

Type: Feature Layer

Geometry Type: esriGeometryPoint

Description: Lakes where the Trophic Level Index (TLI) is monitored and reported on as part of the State of the Environment monitoring process by Environment Canterbury. The Trophic Level Index (TLI) provides information on water quality in lakes. The TLI is determined by measuring: - total nitrogen - total phosphorus - visual clarity - algal biomass. Lakes are classified: Trophic Level 0-1 = Ultra-microtrophic Trophic Level 1-2 = Microtrophic Trophic Level 2-3 = Oligotrophic Trophic Level 3-4 = Mesotrophic Trophic Level 4-5 = Eutrophic Trophic Level 5-6 = Supertrophic Trophic Level 6-7 = Hypertrophic The main trophic states determined by these indicators are: - Oligotrophic lakes are clear and blue, with very low levels of nutrients and algae. - Mesotrophic lakes have moderate levels of nutrients and algae. - Eutrophic lakes are green and murky, with higher amounts of nutrients and algae. - Supertrophic lakes are fertile and saturated in phosphorus and nitrogen, often associated with poor water clarity. Excessive phytoplankton growth can occur in ideal conditions - when there's a calm, hot and sunny period of a few weeks. - Hypertrophic lakes are highly fertile and supersaturated in phosphorus and nitrogen. They have excessive phytoplankton growth which contributes to poor water clarity, poor suitability for recreational uses, and restricts the habitat for desirable fish.

Copyright Text:

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Spatial Reference: 2193  (2193)



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Layer: Trophic Level Index Grades (1)

Name: Trophic Level Index Grades

Display Field: Lake

Type: Feature Layer

Geometry Type: esriGeometryPoint

Description: Lakes where the Trophic Level Index (TLI) is monitored and reported on as part of the State of the Environment monitoring process by Environment Canterbury. The Trophic Level Index (TLI) provides information on water quality in lakes. The TLI is determined by measuring: - total nitrogen - total phosphorus - visual clarity - algal biomass. Lakes are classified: Trophic Level 0-1 = Ultra-microtrophic Trophic Level 1-2 = Microtrophic Trophic Level 2-3 = Oligotrophic Trophic Level 3-4 = Mesotrophic Trophic Level 4-5 = Eutrophic Trophic Level 5-6 = Supertrophic Trophic Level 6-7 = Hypertrophic The main trophic states determined by these indicators are: - Oligotrophic lakes are clear and blue, with very low levels of nutrients and algae. - Mesotrophic lakes have moderate levels of nutrients and algae. - Eutrophic lakes are green and murky, with higher amounts of nutrients and algae. - Supertrophic lakes are fertile and saturated in phosphorus and nitrogen, often associated with poor water clarity. Excessive phytoplankton growth can occur in ideal conditions - when there's a calm, hot and sunny period of a few weeks. - Hypertrophic lakes are highly fertile and supersaturated in phosphorus and nitrogen. They have excessive phytoplankton growth which contributes to poor water clarity, poor suitability for recreational uses, and restricts the habitat for desirable fish.

Copyright Text:

Default Visibility: false

MaxRecordCount: 1000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 3000000

Max Scale: 0

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:
XMin: 1348529.5017999997
YMin: 5048432.5746
XMax: 1648014
YMax: 5304801
Spatial Reference: 2193  (2193)



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