List of Articles SCS

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  1 - Site selection of areas influencing to flood control programming with using of HEC-HMS Model Case study in talaqan basin
  zahra hedjazizadeh Ali Pourang Seyedeh Mahya Seyedan
  This recent study in Talequn catchment, placed in Alborz province, has been performed to prioritize affecting peak flow areas and generally areas that have a greater role in flood occurrence. To do this task, Arc Gis (Geographic information system) has been utilized to More

  This recent study in Talequn catchment, placed in Alborz province, has been performed to prioritize affecting peak flow areas and generally areas that have a greater role in flood occurrence. To do this task, Arc Gis (Geographic information system) has been utilized to prepare maps of physical properties of Talequn basin catchment and also rain gauge date and equivalent run off statistics of Tehran regional water, for 20 years(1993-2013) has been received. As a result of existing data, four flood events were extracted and were calibrated under the (HEC-HMS) model. TO do calibration, SCS method was used to simulate flood hydrograph and lag-time method was utilized for channel routing. Also, Hydrologic Modeling System (HEC-HMS) was used to estimate the amount of contribution of sub-basin in output discharge of the total basin catchment on the basis of return periods of 2-5-10-25-50-100 years old and finally by the use of the 50-year return period and sub-basin individual remove method under the effect of HEC-HMS model, sub-basin were prioritized in terms of flooding potential. The research results show that sub-basin participation rate in output of basin catachment discharge is not only of affected area and sub-basin peak flow but also of factors such as curve number (CN) and soil hydrologic group which have significant role in flood occurrence. Another significant factor is sub-basin located in basin output, which has greater share in output discharge. In addition, short intervals in occurrence of peak flow of sub-basin water flow synchronization role, human changes such as construction activities like housing, have significant impact on the production of the whole basin flood areas. Manuscript profile
• Open Access Article
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  2 - Estimation height of Runoff Using Curve Number Method and Tools Arc CN-Runoff (Case study: KESHAR Watershed, Tehran)
  mohammad mahdi hosseinzadeh  
  Due to the global water crisis, having the right information for managing the planning and optimization in different locations is essential. The conventional methods of measuring are very costly, time-consuming and difficult. In recent years in order to reduce this prob More

  Due to the global water crisis, having the right information for managing the planning and optimization in different locations is essential. The conventional methods of measuring are very costly, time-consuming and difficult. In recent years in order to reduce this problem and estimate runoff the watershed, the Geographic Information System (GIS) has been used. In this study, by using daily rainfall data in the SMADA software,return period of 2and 50 years was obtained.ArcCN-Runoff tool with respect to the accuracy and precision in numerous research studies have been made to creat maps and volume of runoff curve number and height were used in the watershed KESHAR. KESHAR area into three groups hydrological B -C-D and was divided into seven land use. The results showed that land use and vegetation and importance of the area in the basin is the most important parameter determines the loss of significant influence and impact on runoff .Curve Number Basin KESHAR shows , rocky outcrops small surface area occupied by the greatest CN (91), The highest volume and highest runoff in the user's area Hydro Group C with 08/56 percent, With low permeability and high potential of runoff is derived, Which puts the area at risk of flooding. Manuscript profile