Floodplains (FEMA and City Studies)

City-wide effective DFIRM floodplain mapping and limited detail floodplain mapping for streams with drainage area exceeding 100 acres required to be regulated but not mapped on the effective FIRM panels.

需开展全市范围的有效数字洪水保险费率地图（DFIRM，Digital Flood Insurance Rate Map）洪泛区制图，同时针对汇水面积超过100英亩、需纳入监管但未在有效洪水保险费率图（FIRM，Flood Insurance Rate Map）图幅中标注的溪流，实施有限细节程度的洪泛区制图。