flood area classification

flood area ratio

landing area flood-light

pattern water-flood area

reservoir flood area

steam-flood area

Flood Detention Area

flood diversion and detention area

flood diversion and storage area

Flood Diversion Area

flood inundation area

Flood of small drainage area

flood retention area

Flood-Prone Area

Huaihe River flood detention area

Jingjiang flood diversion area

the Jingjiang flood diversion area

area, area side trapezoid

area-area