ngr: postcode: © crown copyright 2014. all rights reserved. image reproduced with permission of...

NGR:

Postcode:

© Crown Copyright 2014. All rights reserved.Image reproduced with permission of Ordnance Survey and Ordnance Survey of Northern Ireland

Site Location (OS map)

Road/Watercourse

Development site outline

Legend

Proposed Site Layout / Illustrative Masterplan

Site Topography

Legend

Insert height range

Insert height range

Insert height range

Insert height range

Insert height range

Insert height range

LegendHeight (m AOD)

Optional legend

© Environment Agency copyright and database rights 2014© Ordnance Survey Crown copyright. All rights reservedEnvironment Agency, 100026380, 2014

FZ3 (>1 in 100/200 AEP)

FZ2 (1 in 100/200 to 1 in 1,000 AEP)

FZ1 (<1 in 1,000 AEP)

Flood defencesAreas benefiting from defences

Main River

Legend

EA - Flood Map for Planning (Rivers & Sea)


>1 in 100/200 AEP

1 in 100/200 to 1 in 1,000 AEP

<1 in 1,000 AEP

Flood defencesAreas benefiting from flood defences

Main River

Legend

NRW - Flood Map

Crown Copyright and database rights 2011Ordnance Survey 100017916

Zone C1 (Significant infrastructure present)

Zone C2 (Without significant infrastructure)

Zone B (Known to have flooded in the past)

Zone A (Little/no risk of fluvial or tidal/coastal flooding)

Legend

Welsh Government – Development Advice Map

Node point

Main River

Legend


EA - River Model Nodes

Node point

Main River

Legend

Natural Resources Wales copyright and database rights 2013© Ordnance Survey Crown copyright. All rights reservedNatural Resources Wales, 100019741, 2013

NRW - River Model Nodes

<asset ref 1>

<asset ref 2>

Xx

Xx

Xx

<asset ref n>

Main River

Legend


EA - Flood Defence Assets

<asset ref 1>

<asset ref 2>

Xx

Xx

Xx

<asset ref n>

Main River

Legend

NRW - Flood Defence Assets



<Insert event date>

<Insert event date>

Xx

Xx

Xx

Insert event date>

Main River

Legend

EA – Historical Flooding Map

<Insert event date>

<Insert event date>

Xx

Xx

Xx

Insert event date>

Main River

Legend

NRW – Historical Flooding Map



Maximum extent of flooding

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EA – Flooding from Reservoirs Map (Extent)


EA – Flooding from Reservoirs Map (Depth)

Legend

Over 900 mm

300 to 900 mm

Below 300 mm

Depth of flooding


EA – Flooding from Reservoirs Map (Speed)

Legend

Over 2 m/s

0.5 to 2.0 m/s

< 0.5 m/s

Speed of flooding

© Crown Copyright 2014. All rights reserved. Licence number 100047514Derived from 1:50 000 scale BGS Digital Data, British Geological Survey - NERC

LegendSusceptibility to flooding from groundwater

Significant

Moderate

Low

BGS – Groundwater Flooding Hazard Map


Flooding Warning Area

Flood Alert Area

Legend

EA – Flood Warning Map


Legend

Risk of flooding from surface water

High (>1 in 30 AEP)

Medium (1 in 100 to 1 in 30 AEP)

Low (1 in 1,000 to 1 in 100 AEP)

Very Low (< 1 in 1,000 AEP)

EA – Risk of Flooding from Surface Water Map

Legend

Risk of flooding from surface water

High (>1 in 30 AEP)

Medium (1 in 100 to 1 in 30 AEP)

Low (1 in 1,000 to 1 in 100 AEP)

Very Low (< 1 in 1,000 AEP)

NRW – Risk of Flooding from Surface Water Map



Legend

Over 0.25 m/s

Less than 0.35 m/s

Direction of water

Surface water velocity

EA – Surface Water FloodingHigh Chance of Occurrence


Legend

Over 0.25 m/s

Less than 0.35 m/s

Direction of water


EA – Surface Water FloodingMedium Chance of Occurrence


Legend

Over 0.25 m/s

Less than 0.25 m/s

Direction of water


EA – Surface Water FloodingLow Chance of Occurrence


Legend

Over 900 mm

300 to 900 mm

Below 300 mm

Surface water depth

EA – Surface Water DepthHigh Chance of Occurrence


Legend

Over 900 mm

300 to 900 mm

Below 300 mm

Surface water depth

EA – Surface Water DepthMedium Chance of Occurrence


Legend

Over 900 mm

300 to 900 mm

Below 300 mm

Surface water depth

EA – Surface Water DepthLow Chance of Occurrence

Soilscapes – Soil Type

LegendInsert soil type

Insert soil type

Insert soil type

Insert soil type

Insert soil type

Insert soil type

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Inner zone (Zone 1)

Inner zone - subsurface activity only (Zone 1c)

Outer zone (Zone 2)

Outer zone – subsurface activity only (Zone 2c)

Total catchment (Zone 3)

Total catchment – subsurface activity only (Zone 3c)

Special interest (Zone 4)

Legend

EA - Groundwater Source Protection Zones

Description (from EA web page)

The shape and size of a zone depends on the condition of the ground, how the groundwater is removed, and other environmental factors. When we define a zone we find out how the groundwater behaves in that area, what constructions there are to get the water out into the public water supply, and the process for doing this. From this we can develop a model of the groundwater environment on which to define the zones.

Inner zone (Zone 1) - Defined as the 50 day travel time from any point below the water table to the source. This zone has a minimum radius of 50 metresOuter zone (Zone 2) - Defined by a 400 day travel time from a point below the water table. The previous methodology gave an option to define SPZ2 as the minimum recharge area required to support 25 per cent of the protected yield. This option is no longer available in defining new SPZs and instead this zone has a minimum radius of 250 or 500 metres around the source, depending on the size of the abstractionTotal catchment (Zone 3) - Defined as the area around a source within which all groundwater recharge is presumed to be discharged at the source. In confined aquifers, the source catchment may be displaced some distance from the source. For heavily exploited aquifers, the final Source Catchment Protection Zone can be defined as the whole aquifer recharge area where the ratio of groundwater abstraction to aquifer recharge (average recharge multiplied by outcrop area) is >0.75. Special interest (Zone 4) - A fourth zone SPZ4 or ‘Zone of Special Interest’ was previously defined for some sources. SPZ4 usually represented a surface water catchment which drains into the aquifer feeding the groundwater supply (i.e. catchment draining to a disappearing stream). In the future this zone will be incorporated into one of the other zones, SPZ 1, 2 or 3, whichever is appropriate in the particular case, or become a safeguard zone


Major Aquifer High

Major Aquifer Intermediate

Major Aquifer Low

Minor Aquifer High

Minor Aquifer Intermediate

Minor Aquifer Low

Legend

EA - Groundwater Vulnerability Zones


Principal

Secondary A

Secondary B

Secondary (Undifferentiated)

Unknown (lakes and landslips)

Legend

EA Aquifer Maps - Superficial Deposits


Superficial (Drift) - permeable unconsolidated (loose) deposits. For example, sands and gravels.

Principal Aquifers: These are layers of rock or drift deposits that have high intergranular and/or fracture permeability - meaning they usually provide a high level of water storage. They may support water supply and/or river base flow on a strategic scale. In most cases, principal aquifers are aquifers previously designated as major aquifer. Secondary Aquifers: These include a wide range of rock layers or drift deposits with an equally wide range of water permeability and storage. Secondary aquifers are subdivided into: Secondary A - permeable layers capable of supporting water supplies at a local rather than strategic scale, and in some cases forming an important source of base flow to rivers. These are generally aquifers formerly classified as minor aquifers; Secondary B - predominantly lower permeability layers which may store and yield limited amounts of groundwater due to localised features such as fissures, thin permeable horizons and weathering. These are generally the water-bearing parts of the former non-aquifers; Secondary Undifferentiated - Assigned where the EA has been unable to attribute either category A or B to a rock type. In most cases, due to the variable characteristics of the rock type.


Principal

Secondary A

Secondary B

Secondary (Undifferentiated)

Legend

EA Aquifer Maps – Bedrock Designation


Bedrock - solid permeable formations e.g. sandstone, chalk and limestone.

Principal Aquifers: These are layers of rock or drift deposits that have high intergranular and/or fracture permeability - meaning they usually provide a high level of water storage. They may support water supply and/or river base flow on a strategic scale. In most cases, principal aquifers are aquifers previously designated as major aquifer. Secondary Aquifers: These include a wide range of rock layers or drift deposits with an equally wide range of water permeability and storage. Secondary aquifers are subdivided into: Secondary A - permeable layers capable of supporting water supplies at a local rather than strategic scale, and in some cases forming an important source of base flow to rivers. These are generally aquifers formerly classified as minor aquifers; Secondary B - predominantly lower permeability layers which may store and yield limited amounts of groundwater due to localised features such as fissures, thin permeable horizons and weathering. These are generally the water-bearing parts of the former non-aquifers; Secondary Undifferentiated - Assigned where the EA has been unable to attribute either category A or B to a rock type. In most cases, due to the variable characteristics of the rock type.


High

Good

Moderate

Poor

Bad

Not yet assessed

Legend

EA – River Basin Management PlansRivers – Current Ecological Quality

ngr: postcode: © crown copyright 2014. all rights reserved. image reproduced with permission of...

Documents

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aep ea risk of flooding

aep nrw risk of flooding

reservoirs map depthlegendover

reservoirs map speedlegendover

surface waterhigh

aepvery low