泛滥盆地 meaning in Chinese

flood basin

And the delta genetic unit includes distributary channel , distributary bay , small lake of delta plain , swamp , distributary estuary bar , frontal delta mud and sandy density flow and so on . the fluvial system is composed of channel , channel side and flooding basin
其成因相包括分流河道、决口扇及决口河道、分流间湾、三角洲平原小型湖、沼泽、分流河口坝、前三角洲泥及砂质重力流等；该区河流体系由河道、河道边部及泛滥盆地等沉积组合构成。