Most welcome Margaret. Do bamboos survive their? If they do then these things we use to reclaim land. They act as a sieve when it rains, water can get through but the soil cannot. Soil settles down behind the bamboos and the level is gradually raised. New shoots grow from the new level so nothing happens to the bamboo as long as you keep harvesting the mature canes. These canes should have good sale value. Just an idea, if it does not detract from your garden beauty no harm and they are very frost resistant.
Regards,
Arif.