Sorry, I meant Semiarundinaria Yashadake Kimmei. I thought I read somewhere that it's quite tolerant of water.

I have the same problem in an area of my backyard but do plan to plant it with several kinds of bamboo for screening purposes. My idea is to raise the planting area up on a berm so that the roots will not be waterlogged during heavy rains. Do your research on berms to make sure you have the proper slope and reinforce the slope to prevent erosion.

Phyllostachys heteroclada does well in my waterlogged spots, for about 3 weeks this summer the ground where its planted was saturated, with about 5-10cm of surface water on top thanks to the normally small stream in my garden, and it came through ok, although alot of the new clums failed, it gave a second flush in september. Other than that try improving the drainage, or raise the planting area, alowing the boo to establish before it starts having to deal with wetter soil!