Jim Last

That's some serious winter you have there! The 2 options are drain the pool and leave it thereby risking your liner or, secondly, put on a winter pool cover. Using a winter pool cover does, of course, require that the water stays in the pool so with a leak your options are limited. Consider also using a winter air pillow under the cover but again if you have leak you are in trouble! Jim

You may find that you need to change the pool liner next spring though! Jim