Answer: It sounds like you have a potentially serious run-off problem. However, based on your description it is perhaps also possible that that area was intended as a sort of cachement area for surface runoff and is functioning exactly as it was intended to do since the water does drain away in a few days. If this is the case, changing it could cause other problems as a consequence. I would reccommend that you bring in an engineer or a landscape architect or other grading and drainage professional to take a look at it on site and make suggestions.
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