the p variant encompasses various measures including the adjustment of the philipsdam to enable the inlet of salt water measures to prevent salt intrusion the dismantlement of current fresh and salt water barriers within the krammer sluices and the bergsediep lock and the adjustment of the outlet sluice near bath other alternatives that were examined include the p alternative and the zout alternative with a salt inlet of respectively m s and m s one of the key decisions in the national structure vision is about a proposal to restore the tides in the lake with a tidal range of centimetres