flooding(A general and temporary condition of partial or complete inundation of normally dry land areas from the overflow of inland and/or tidal waters, and/or the unusual and rapid accumulation or runoff of surface waters from any source. A great flow along a watercourse or a flow causing inundation of lands not normally covered by water)
surveillance(System that permits the continuous observation, measurement and evaluation of the progress of a process or phenomenon with the view to taking corrective measures)