in Punjabi bund is the word standing for buttocks of a man or woman.

Nulla bunding is a type of crop irrigation system. It involves creating lateral trenches here and there on sloping ground and surrounding them with a stone wall to keep the water from leaving the trenches.

a lateral trenches dug across sloping ground to collect the soil flowing with the water.

Afforestration, terrace farming,bunding as well as preventing soil/land erosion which will degrade or deteriorate the land. Again solid waste and other pollutants should be minimized from the land.

Really, only by not building it in an area prone to flooding, such as a river's flood-plain, or too close to the sea, in the first place. Otherwise, bunding, etc.