عنوان مقاله [English]
Soil properties and type of land use are the most important factors that directly determine infiltration rate, and hence, control the creation of flood in watershed, which. In other words, each watershed’s Curve Number, shows hydrological behavior and water regime during precipitations. This study was carried out in Maraveh-Tappeh watershed, Golestan province. The main object of the study is production of Curve Number map for the study area. Using GIS, the average weighted Curve Number of the watershed was 77 in humidity level of grade II and major part of the area had Curve Number of 79. Results revealed that, the maximum Number of Curve Numbers during mean humidity reaches up to 97 and the minimum number reduce to 60. Accordingly, High number of weighted average Curve Number could be an evident of low infiltration rate of watershed and increasing probability of flood occurrence owing to loess soil. It is necessary to implement basic practices at the watershed in line with increasing of water infiltration rate via establishing water harvesting systems including pitting and contour furrow, combined with vegetation increasing projects such as seeding and shrub planting. Additionally, with derivation of current Curve Number map and consideration to precipitation regime of the watershed it can be implemented sustainable development plans in water resources management and finally it may be presented the ways to contrast with water tensions and controlling floods in this watershed.