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Line 31: == Sutherland Shire Council == The Sutherland Shire Council Urban Drainage Manual (1992) includes information documenting pit grate and lintel capacity information,. The information was derived from Department of Main Roads field tests. ~~The information~~Information relevant to TUFLOW modelling is summarised below. The Sutherland Shire Council pit guidelines are based on the standardised design shown below:<br> [[File: Pit_Inlet_Curves_SSC000.JPG\|700px]]<br> The ~~guideline states, the~~ capacity of a pit depends on three factors:▼ * The area of clear opening of the grate ▲The guideline states, the capacity of a pit depends on three factors: * ~~the~~The depth of water ponding over the grate ~~<br>~~▼ * the length of lintel opening * ~~the~~The ~~area~~length of ~~clear~~lintel opening ~~of the grate~~ The following graphs summarise grate and lintel flow estimates for a range of water depths and blockage factors. <br> ▲* the depth of water ponding over the grate <br> ~~The guideline provides information used to derive the below unit area and unit length capacity charts. <br>~~ [[File: Pit_Inlet_Curves_SSC001.JPG\|700px]]<br> [[File: Pit_Inlet_Curves_SSC002.JPG\|700px]]<br> The above graphs estimate unit length and area flow estimates. These unit values are multiplied by real pit dimensions to define at site depth/flow characteristics. An example is provided below for a single pit location. TUFLOW modelling requires the derivation of a unique depth/flow curve for each pit type within the modelled area. <br> ~~A pit inlet curve is derived by~~ [[File: Pit_Inlet_Curves_SSC003.JPG\|700px]]

1D Pits: Difference between revisions