A gross pollutant trap is a treatment device designed to capture coarse sediment, trash and vegetation matter carried in the stormwater. music assumes that gross pollutant traps have very small pool volumes, and therefore, no hydrological routing is simulated within the GPT node.
In MUSIC-XMUSICX, Generic Treatment DevicesNode is used for GPT. music MUSIC requires you to describe the performance of the GPT (entered in a table) for each pollutant type, and does not provide default performance figures. The reason for this is that there are many GPTs available, including several proprietary products, which may perform very differently. Appendix C provides a summary of one study of GPT performance, undertaken by the CRC for Catchment Hydrology (Allison et al., 1996; Walker et al., 1999).
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Gross Pollutant Trap Properties
Please refer Generic Treatment DevicesNode.