Research And Development Of GuangDong Province Storm-surge Numerical Prediction System Supported By ComGIS

Disaster arising from storm surge is the most serious oceanic disaster, and accurate and timely numerical prediction is one of primary nonstructural measures for storm-surge disaster control. However, this method has distinct deficiency in some aspects such as data collection, visualization and spatial query and analysis of simulative results, thus accurateness and time effect of storm-surge prediction are affected to a great extent, and effective analysis as well as visual comprehension are obstructed at the same time.Storm-surge numerical prediction system supported by GIS, as a synthetic nonstructural measure for storm-surge disaster control, combines GIS with storm-surge numerical model felicitously, and provides well operating environment for storm-surge accurate prediction and visualization and spatial query and analysis of simulative results. According to present situation and affair of storm-surge disaster control in Guangdong, this paper discusses integrated technical essential of ComGIS with Desktop GIS implemental software and storm-surge numerical model, and develops integrated system of storm-surge numerical prediction supported by GIS.Main contents of this thesis consists of three parts as follows:1) The ways and specialties of Desktop GIS development are summed up; Integrated methods, faced problem and integrated approaches of GIS and professional applied model are analyzed.2) Relative full-blown numerical prediction pattern is applied to simulate typhoon storm surges, which affect sea area of Guangdong.3) Spatial Database technology of GIS is applied to realize chart show and spatial query about information such as water depth, typhoon route and tide level, correlative with prediction of storm surge; Digital Elevation Model is utilized to make water landform to generate the difference-grid data automatically; GIS visualization technology is applied to simulate coastal dynamic environments (like flow field and storm-surge water accretion distributing) and their transformation process in typhoon-affected region.