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Layer: Agricultural Critical Risk Areas Colour Coded (ID:0)

View In:   Map Viewer

Name: Agricultural Critical Risk Areas Colour Coded

Display Field: bh

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description:

The agricultural risk map is based on activity classed as arable horticulture or improved grassland by the CEH land cover map 2007, which is carried out on land parcels scored against a matrix of risk factors and the 2015 status of WFD enrichment indicators. These risk factors have the potential to contribute to in-stream biological, chemical and physiochemical impact. The land cover classes arable horticulture and improved grassland together delineate the boundary areas of intensive agriculture and constrain the area for relative risk assessment. They also contribute to the risk factor scores with a distinction made between their relative risks.

A modelling application SciMAP was applied with a 5m DTM to produce sediment source and deposition areas as well as identifying significant hydrological links to the river network.

Each risk factor has been assigned a relative weighting from 0 – 1 dependant on its contribution to the overall risk (expert judgement/advice and literature review). These weightings have been used as multipliers for a three category risk index, 1 - 3 relating to banding of risk factor variables into increasing risk. The scores are then totaled to provide an overall risk for each land parcel. These can also be filtered on hydrological significance.

Risk categories boundaries are determined by selecting +/- 1 standard deviation of the distribution of the scores. This provides a statistical basis for the low, medium and high risk category limits. Further categories can be created by increasing or relaxing the standard deviation applied. The extent of the area included in each category is dependent on the stringency of the standard deviation applied.



Copyright Text: DAERA Water Management Unit, Water Analysis Data & Evidence, waterinfo@daera-ni.gov.uk https://www.daera-ni.gov.uk/contacts/water-management-unit

Min. Scale: 4622325

Max. Scale: 1128

Default Visibility: true

Max Record Count: 2000

Supported query Formats: JSON

Use Standardized Queries: True

Extent:

Drawing Info:

HasZ: false

HasM: false

Has Attachments: false

Has Geometry Properties: true

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Object ID Field: OBJECTID

Unique ID Field:

Global ID Field: GlobalID

Type ID Field: ruleid

Fields:
Types:

Is Data Versioned: false

Has Contingent Values: false

Supports Rollback On Failure Parameter: true

Last Edit Date: 7/17/2021 12:11:59 PM

Schema Last Edit Date: 7/17/2021 12:11:59 PM

Data Last Edit Date: 7/17/2021 12:11:59 PM

Supported Operations:   Query   Query Top Features   Query Analytic   Query Bins   Generate Renderer   Validate SQL   Get Estimates