One corner of my back yard was like a swamp for a week or so after every
hard rain. I dug a hole in that corner and planted a wire bucket and put in
a sump pump with a long hose running out to the street. Placed a lid on top
of the bucket, covered a 4' x 8' area with rocks and made the area into a
rock garden using a number of flower pots.

Works great and I no longer have to be concerned about mosquitoes,