Alex Ames wrote:There is another video from Geoff Lawton that explains that the swale is designed with an overflow system. He is doing it
in miniature in the dirt. I can't find it but it is out there. There is some precision required to get it right so the heavy rains
don't just over flow it and take it out as you fear.
Jonathan Teller-Elsberg wrote:After I complained yesterday about not finding an easy source of info on determining swale sizes and spaces, I decided to construct such a thing. Using Lancaster's formulas, I built a spreadsheet that allows quick calculation of related swale sizes and spacings. You can start either with a certain size in mind and learn the associated spacing, or start with a spacing in mind and learn the associated size(s). I have posted it towards the bottom of http://www.terrapermadesign.com/home/garden-and-landscape-tips/.