چكيده انگليسي :
Since the distant past, flood has always been one of the natural hazards and until today it has caused heavy damages to human life, some of which are irreparable. In the past, with existing facilities, local materials, and nowadays with different software, satellite data and other advanced methods, solutions are considered to reduce the damages caused by floods. In this research, with the two goals of assessing the damages caused by floods and providing flood control solutions, we have tried to achieve these goals by using different software. For this purpose, the assessment of flood damage including economic damage to residential and commercial buildings along with their internal properties using HEC-FIA and HAZUS software and loss of life using HEC software - FIA has been done in the return period of 2, 5, 10, 25, 50, 100, 200, 500 and 1000 years and then solutions for flood control in the region have been proposed. In order to achieve these results, in the first step, the maximum annual 24-hour rainfall of 15 rain gauge stations was introduced to the Hyfran Plus software in order to fit a suitable distribution and calculate the 24-hour calculation value in the period of different returns. By fitting different distributions, it was found that Gumbel distribution had acceptable to excellent results in all stations. In the second step, the amounts of these precipitations were introduced to the HEC-HMS software and using it, the flood hydrograph was obtained in the period of different returns in the upstream of the waterway leading to Yazd city. Then, in the third step, using HEC-RAS software, with the definition of two-dimensional environment and 10×10 square meter grid, flood simulation with unsteady flow in different return periods was done. In the fourth step, by introducing Maximum Depth and Arrival Time files in Float format, FIA depth-damage curves and building inventory data along with population distribution to HEC-FIA software, the amount of damage mentioned in the return period was evaluated differently. The results showed that the amount of total losses in the period of returns of 2, 5, 10, 25, 50, 100, 200, 500 and 1000 is equal to 0, 0, 76.3, 304.77, 730.31, 1321.95, 2271.73, 2850.62 and 3092.21 thousand dollars. The results of the evaluation of human casualties showed that the number of casualties in all return periods was zero.. In the fifth step of flood damage assessment using HAZUS software, it was considered that due to the development of this software for the American continent, it was not possible to directly assess flood damage using this software. Therefore, flood damage has been evaluated by directly using the depth-damage curves of New Orleans District and by using ArcMap10.8 and MATLAB R2018b software. The results of this software show that the total amount of flood damage in the period of 2, 5, 10, 25, 50, 100, 200, 500 and 1000 returns is equal to 0, 0, 306.38, 625.79, 1483.22, 2252.67, 4084.42, 5114.36 and 5431.88 thousand dollars. According to the results of flood damage assessment using both softwares, it is clear that the amount of flood damage increases for different return periods. Therefore, considering the appropriate flood control strategies before the hazards occur, should be considered. According to the results of the research and the existing conditions in the region, the solutions proposed in this research for flood control include revitalizing the Yazd Mesil, preventing more constructions in the Mesil area, creating a dam in the Mehriz highlands and using stored water for feeding. The artificial aquifer of Yazd-Ardakan plain and the surrounding aqueducts, including Seyed Mirza aqueduct, need to determine the definitive solution for flood control in the region, taking into account the experience of the regional officials and considering the budget required for the implementation of the project.
