Answer: While I have heard of incidents where a willow tree for instance dried out a damp area, and it is true that a large mature tree will absorb a large amount of water, I would not rely on that to solve a drainage problem. Instead, you might want to talk to your neighbor about the overwatering (it is costing them extra on their water bill, if nothing else) and also look into adjusting the drainage pattern for the area. A landscape architect or other professional with experience in drainage issues should be able to make suggestions. Although drainage matters are complex and can sometimes be difficult to rectify, other times the solution is simple and relatively inexpensive. In my experience it is well worth looking into.
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