Comment: I didn't finish ...

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In reply to comment: Thank you so much. Did you (see in situ)

I didn't finish ...

I didn't finish looking at the site until today. They have a lot of great pictoral representations with the articles such those shown in the article below.

Water Catchment Strategies For Drylands: Swales

Btw, if you want some information on P. A. Yeoman's Keyline design and Darren Doherty I can add the links. There were some comments about it at the bottom of the article I linked to.