Tunnels in open field

Fine

Today too, wife and I fixed tunnels on furrows in our farm. A part of them were crushed because of the weight of snow, again. I can not count how many times we fixed them. It is sometimes blown off, and sometimes crushed by snow.
Actually it is difficult not only to keep its shape, but also to water inside of tunnel.
In my case, I use thin water tube. I chose it because of its cast. But it does not stay on furrow after setting, because it is also blown off or twisted. In these case, it is necessary to reset it, before to start water.
I want to say that it is not easy to handle tunnels in an open field.