Changes

|Thickness (mm)||Entire trench

|Thickness (mm)||Entire trench

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|Void ratio||Suggest value 0.4 (unless otherwise tested) for designs using just clear stone [[reservoir aggregate]] for storage. For any design using preformed [[infiltration chambers]], the overall ‘effective void ratio’ will vary between 0.67 and 1.0 according to product geometry.  

|Void ratio||Suggest value 0.4 (unless otherwise tested) for designs using just clear stone [[reservoir aggregate]] for storage. For any design using preformed [[infiltration chambers]], the overall ‘effective porosity’ will vary between 0.50 and 0.95 according to product-specific geometry.  

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|Seepage rate (mm/hr)||Infiltration rate of native soil. See [[design infiltration rate]]

|Seepage rate (mm/hr)||Infiltration rate of native soil. See [[design infiltration rate]]