Many reviewers are now requiring additional BMP calculations governing water quality.
PondPack can quickly calculate first-flush volume – the initial portion of the storm that flushes off pollutant particles that have accumulated since the previous rainfall event. Detaining stormwater for longer periods allows more time for particulates to settle out of the system. Test your pond design for minimum drain time performance, or select from a variety of detention time methods, including peak-to-peak, centroid-to-centroid, and weighted average plug flow.
PondPack also addresses water quality issues surrounding infiltration by offering a variety of infiltration options in ponds and reaches.