In Ethiopian cities/urban centers the attention towards urban storm water drainage is very low. This work gives an emphasis to storm water drainage management-as storm water/urban flooding increase with urbanization. Also this study needs to concentrate on sustainable storm water management instead of the conventional ones due to its numerous advantages. This is to mean the attention to on-site infiltration should be emphasized. The use of grassing-in general porous structures will encourage on-site infiltration by reducing urban flooding. urbanization in general leads to deforestation....