Relarding basin of Kambang Iwak Kecil and K ambang Iwak Besar is included in subdistrict Ilir Barat II and Bukit Kecil Palembang. Inundation in several places is often occurs in rainy season. In an effort to overcome problems of flooding, such as normalization, enlargement dimensions of drainage channels and retarding basin. Retarding basin is one of flood control altemative that has not been m…