Long term landscape planning for the type of floods which have afflicted Australia could involve designing the landscape in the manner of a regional waffle. Much of the problem seems to have been caused by flows of water on an almost continental scale. The principles, as for Sustainable Urban Drainage Schemes, (SUDS) should be to detain, infiltrate and evapo-transpire flood waters. This process would be assisted by raising embankments where possible: field boundaries, roads, garden boundaries etc should all become dykes. In some cases the dykes would protect against floods but the main objective would be to stop the flood water cascading from zone to zone. Also, the dykes would serve as wild-life corridors and sanctuaries. My guess is that waffle-type measures would be cheaper and more effective than building large dams. The next stage would be to move from flood landscape planning to flood landscape architecture, by finding other uses for the dykes and by making them beautiful as well as useful. Individual properties would gain some similarities to motte-and-bailey Norman castles. Another advantage of waffle landscape planning is that when the rains come there will be more time for water to infiltrate into the ground and re-charge aquifers – in preparation for the next long period of drought. Does anyone know if waffle landscape planning has been considered, and if the engineering calculations have been done?
Image courtesy mhaithaca