Groundwater Impact Screening Tool

Groundwater impact is determined by source (contamination), pathway (soil permeability), and receptor (aquifer sensitivity). This step captures site hydrogeology.

Project Information

Project Name

Site Reference

Engineer Name

Date

Soil Type *

Affects contaminant pathway and attenuation capacity

Groundwater Vulnerability Zone *

From Environment Agency GIS mapping

Source Protection Zone (SPZ) *

Stringent controls apply in SPZ1

Depth to Water Table (m) *

Minimum 1m clearance required for most SuDS

Groundwater Level Seasonality *

Affects minimum design depth

Previous land use and known contamination determine the pollution source. Infiltration near known contamination may be unacceptable.

Previous/Current Land Use *

Source of potential contamination

Known Contamination? *

Pollution Source Proximity (m)

Distance to nearest identified source

Proposed SuDS Infiltration Types *

Soakaway Permeable paving Infiltration trench Infiltration basin

Estimated Infiltration Volume (m³/day) *

Based on catchment area and rainfall

Automatic risk scoring using: Source (contamination) × Pathway (soil permeability) × Receptor (aquifer sensitivity). Results apply SPZ restrictions and depth checks.

Risk matrix will be calculated when you proceed...

Review the risk assessment below and proceed to view recommendations:

Risk assessment is automatically calculated based on your inputs. Click "Calculate & Review Risk" to proceed to detailed results and recommendations.

Engineer's Notes Optional, included in PDF report