Tukaj R. The development of photogrammetric methods for assessment of flood risk areas

The Thesis introduces theoretical principals and applied practical methods of evaluation of terrain condition which is directly under risk of flooding. The method uses concept of digital terrain model and its part which is digital surface model, which was build based on digital air photos as well as laser data points LiDAR. The method was applied in extreme condition of hurricane Catherina which has flooded southern states of United States coursing great material losses as well as many deaths between people. Using theoretical rule and flood modeling of river bed in shape of trapezoid it was proved that instruction parameters are much higher then needed. The reason comes from DTM which doesn't effect flood prognosis as much as hydro parameters and volume of flooding water. Proposed an proven method of flight high calculation for photogrammetrical purposes using matrix CCD and push broom CCD. There were recommendations included for LiDAR scanning for flood protection purposes. It was proven that instruction limits are too high which leads to more time consuming work as well as not needed field work. Introduced methodology of water volume calculation and evaluation of flooded building and street and roads was done with use aerial images, LiDAR points, high resolution satellite images. For the road and street flooding assessment the best turn out to be LiDAR data and orthophoto maps with pixel of 1m. For the buildings flooding assessment the methodology base on LiDAR points and cetroids automatically placed over each building. For contour generation it is necessary to have dense lidar points coverage with minimum of 0,1 point per 1m2. Ineffectiveness of this method was proven in New Orleans case were final assessment was done one week after the hurricane. The technology created by the author - creating cartographic products for areas which will be covered by extended flood protection projects were improved by new much higher capacity of LiDAR systems, digital aerial cameras and new geoinformatic technologies. This merged methodology is being used in project ISOK , which covers 61% of territory of Poland and it is one of the largest at this level in the World using LiDAR technology ( for flood protection puposes).