SUDS Research Dr Martin Mansell School of Engineering and Science University of Paisley

Current Research Frequent Storm Storage Unit Water Balance of Paved Surfaces

Frequent Storm Storage Treatment Unit Plan void formers 10mm gravel sand porous pipes geotextile membrane central chamber area for 2D modelling

Frequent Storm Storage Treatment Unit Section

Storage Unit Rig

Water Levels in Tank

Water Levels in Sand and Gravel

Water Quality Results LocationTime (mins.) pHSus. solids (mg/L ) BOD (mg/L) COD (mg/L) inlet inlet outlet outlet < 3<10 outlet < 3<10

Metal Concentration

Salt Concentration

Issues to be Resolved Sediment in pipe

Issues to be Resolved Loss of Voids Treatment Efficiency (esp metals) Groundwater interaction Surcharging Long term Maintenance

Water Balance Principles Depression storage Infiltration Paved surface Soil Filter Drain Runoff Evaporation Precipitation infiltrationjoint flow

c) Rough relief surface E I R MC(%) b) Medium relief surface E I MC(%) Depth Infiltration MC(%) Depth Evaporation MC(%) Depth Infiltration and Evaporation profile for different surface types a) Smooth relief surface E I R Surface Texture

Infiltration EvaporationPrecipitation Runoff Brick weighing to measure the infiltrated water Cross section of brick slab investigated Measurement of Water Balance under Field Conditions

5 Slabs under Field Conditions Brick, Concrete, Asphalt slabs Weather Station Rainfall raingauge Runoff gaugeRespective cubes

Water Balance Model Q1 Q2 S2S2max Infiltration (I) Precipitation (P)Evaporation (E) Runoff (R) S1S1max Joint Flow (J)Q1 Cross section of paved surface

Water Balance Model