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The main factors in flooding damages are the natural drainage pattern changing in urban and sunurban areas. The main goal of this research is assessing flood risk; peak flow estimation and efficiency of surface runoff channels in Bandar-Abbas urban watershed and sub basins. For this aim, the digitization of data has been implemented using the GIS which includes drainage density, length of stream, land use type, geology, area and slope. Flood risk ranking was performed by the PROMETEEII model and the peak flow estimated with the Krigger method. Results and outputs  show that, according to estimation of peak flow and former experiences, the runoff disposal channels, have are not able to transport flood more than over ten-period return and if a severe flooding occures, the city suffers a damaging flood. The Result of PROMETEEII shows that, Shilat and Sooro subbasin are the highest and lowest risk flood, respectively. Also, the most important criterias in flood risk are the length of stream and drainage density. Therefore, efficient manner are needed to reduce the flooding in urban watershed and improvement of channel system.
 

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In order to manage watersheds, especially in mountainous areas that are not adequately station  hydrological phenomena simulation is important. In this study, the SWAT model used to simulate hydrologic basin Eskandari. Calibration and validation of models for the periods 2006-1992 and 2009-2015, respectively, using the algorithm SUFI2 in software SWAT CUP was done. To evaluate the simulation results of the index R2, bR2, NS was used. In the calibration coefficients, R2, bR2 and NS, respectively, 0.76, 0.53 and 0.76 in the validation, 0.56, 0.29 and 0.52 was obtained. Sensitivity analysis showed that 23 parameters affecting runoff curve number was identified as the most important parameters and parameters constant groundwater discharge, Groundwater delay time and soil available water to more sensitive respectively. Indicators and charts obtained simulate monthly runoff rate, indicating that the calibration of the model has been more successful. The model has been able to determine the time of peak flow well, but peak flow estimates are higher than the actual values, which can be attributed to the distribution of rain gauge stations and the interpolation of rainfall.

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Rainfall-Runoff simulation is one of the main subject of hydrology and environmental management. Therefore, researchers are constantly interested in finding new ways to solve this problem and modify existing models or modeling methods. However, the lack of statistics and information from the poor development of hydrological networks has always been a major problem in countries that facing financial, human and technical crises. There are also cases in border areas that have catchments shared with other countries and access to statistics and information from these catchments will be very difficult to modeling. This problem can be partially solve today by extracting the require data for modeling from global climate centers. Therefore, in this study, in order to solve this problem, try to extract the necessary information for modeling by SWAT and IHACRE integrated distribution models from NCEP CFSR climate center in the upper basin area of Dez Dam. Finally, in order to determine the ability of the models to simulate the runoff of the basin, the criteria of Nash-Satcliffe coefficient (NS) and correlation coefficient (R2) were used. The results showed that the two models performed well in using climate database information Based on this, the values ​​of Nash coefficient and correlation coefficient in SWAT model in calibration stage are 0.78 and 0.84, respectively  and In the validation stage, 0.78, 0.89  and in the IHACRES model, in the calibration stage, 0.83, 0.75, and in the validation stage, 0.77 and 0.81, respectively.

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   The issue of water transfer from the high seas (Oman and the Persian Gulf) to Yazd province has been very controversial in recent years. Therefore, it is necessary to examine the infrastructures and capacities needed to implement such projects in the country in order to identify the deficiencies and shortcomings and to take effective measures to address these issues. In this study, using SWOT matrix analysis, we tried to investigate the strengths, weaknesses, opportunities and threats in the field of water transfer at three systemic, organizational and individual levels. To this end, a questionnaire was prepared at three levels and was completed by 30 experts in the executive departments related to water transfer. Analysis of the questionnaires showed that the designed strategies were part of the defensive and conservative strategies. The results showed that at the macro level and policy making of the country, a strategy with a score of 9/835 recalls the importance of preventing aquatic activities and preventing effective measures for desertification has the highest priority. At the individual level, a strategy that addresses the prevention and avoidance of personal and non-professional attitudes with a score of 8.997 has the highest priority, which can be addressed by conducting specialized trainings, workshops and expert meetings.