Study On Advanced Assessment Of Flood Disaster Loss In Lower Reaches Of Huanghe River

Yellow river is the most sandiness quantity river in the world. Because of its characteristic, Yellow river channel is easy to silt and flood breaks out frequently. To assess ahead loss of flood is importantly significance for establishing preventing flood system. On the one hand, it is helpful to constitute reasonable measure of protecting flood, at the same, evaluate all sorts of measure and choose the best one. On the other hand, it is basal work for class of flood affecting region in lower reaches of Yellow river region.Based on direction of theoretics of disaster geography and disaster economics and application of GIS, this pa per predict and assess loss of flood in lower reaches of Yellow river. Because of including Hebei, Henan, Shandong and Anhui province and more than hundred countries, it is typical large scale flood disaster assessment.Based on characteristic of flood disaster of Yellow river and large scale flood disaster assessment, this paper's work step is followed:(1)Applying model of digital simulating flood-waterlog based on GIS and confirming area submerged and flood's deep.(2)Taking statistic, coordinating and spatializing all kinds of social and economic property in submerged area.(3)Using for reference loss rate, which some former researcher confirm through investigating after some flood disaster, to assess loss rate of this paper.(4)Intersecting maps between scope and water deep of flood submerged area and spatial data of all kinds of social and economic property in submerged area.Through assessing, flowing conclusion was gained:(1)If Yellow river overflow, more than ten thousands sq.km land and ten millions people will be submerged and development of social and economic of submerged area will be grievous intimidate.(2) Flood will destroy all sorts of means of transportation. On the one hand, it will cause grievous direct economy loss, on the other hand, intermit of traffic will affect other area and cause disadvantage effect on balance of important stratagem material in our country.(3) If Yellow river overflows, there is great economy loss in both...