I'm going to be installing a small swaled system on a 2.5 acre property. Either two or three swales, it depends on if I fudge the uppermost swale or not. The uppermost swale needs to go by some established trees. These trees are roughly between 30-40' tall, and the canopy's touch. There are two options for swale placement, either between the trees, where there are two or three trees about 15-20' apart, so the swale would go in-between them. which would be on contour. Or, I can go below all the trees about 10-15', and fudge the swale a little bit to get the bottom level. If I fudged it a little, then it will be deeper on one end and shallower on the other so that I can keep the bottom level so that it fills with water evenly. The catchement is around 80 acres, and I would like to make the swales quite large...possibly up to 9' wide and 3' deep. How can I install this swale through or below these trees? I recall a video of Geoff Lawton having a swale installed where they had to go above a tree a little bit because it was in the contour path, and that swale was still quite close to the tree. I'm at a loss here and don't know what to do. And those are the only options for this swale placement, otherwise the water will follow down an erosion gully and off the property.