I need to keep my drainage ditch bottom mowed for better runoff. We are the low end of surrounding ground, so everything wet comes our way.
Over time the ditch has reached a 3 to 4ft width at the bottom, mostly flat, so I can push the weed trimmer along without too much trouble, cutting things VERY short. Not my favorite job, though not terribly hard. Sides are about 4-5ft high half the length, slope away fom the bottom, so probably 8ft or so for most of the top edges in width. There are some lower, flatter places on one edge, allowing water to flow in or flooding out to expand into the pasture if needed. Sometimes the water is too much volume, just can’t leave fast enough for what rain is coming down.
The last of the banks heading into the drain tube are rather steep on both sides, not much vegatation survives the water flow there. I tend to only mow once or twice a year, during dry spells when the dirt is dry. Less tripping and snagging wheels in mud. But I need the grass/weed growth on the bottom removed for faster water flow during and after heavy rains. Any kind of growth over an inch or two impedes the flow, leading to ponding across the road at the neighbor and in my pasture. The water really runs hard thru the ditch into the buried tube leaving our place. Can’t make it pretty and useful both.
I do spray glyphosate on totally dry ground, ditch bottom once a year. It aids in less mowing needed. Not going downstream to contaminate the river water. The advantage of PROPERLY MIXED glyphosate, is that it disapates, effectiveness stops after about 24 hours after application. I never mix herbicides, to make “my own formulas.” That idea scares me after reading label warnings! You can buy premixed herbicides containing varieties, which is probably the best (safest) way to get multi-use products.
The only wildlife living by our ditch are some crustaceans that burrow deeply into the ground in the dry times. They also live in the pastures, damp areas around the farm. You can tell locations by their piling wet dirt way up around the holes, like a castle tower. Look like mini lobsters, 2-3 inches long! However the only time we got curious enough to dig up a burrow to find that “hole maker creature”, son was down over 2ft to finally catch it. We were rather amazed to learn of it’s existance, here on farmland, not lakes! I figured he would find a salamander or frogs. They do molt their entire shells, so we find tiny lobster shells laying about now and again.