I'm contemplating using stick drains in my new polytunnel to distribute water underground. The idea is that the water from rainfull outside will be collected along the edge of the tunnel and directed under the plastic into the centre of the tunnel from the left hand side in this view.
new polytunnel under construction
My husband has been topping the spruce trees that are a bit close to the house, so we now have a fairly large quantity of green trimmings that are not much use for burning. I have used them in the past to mulch my blueberries, but they are not my favourite mulch material as they probably need to be used in a uch thck layer to be effective for weed suppression.
What I'm wondering is could I use this material as a sheet layer in between and unde the stick drains to distribute and hold water under the soil in my tunnel? Will it end up an anaerobic layer of yuck (and does that matter), or will it be a good way of using the spruce trimmings? I attach a sketch with cross sections. The soil depth is likely to be only 18 inches or so, and at present the rainfall drains away pretty quickly.
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