نوع مقاله : مقاله پژوهشی
1 دانش آموخته کارشناسی ارشد؛ گروه آبخیزداری، دانشکده کشاورزی و منابع طبیعی؛ دانشگاه آزاد اسلامی، واحد علوم و تحقیقات؛ تهران؛ ایران
2 استادیار، گروه آبخیزداری؛ دانشکده کشاورزی و منابع طبیعی؛ دانشگاه آزاد اسلامی؛ واحد علوم و تحقیقات؛ تهران؛ ایران
3 استاد، گروه آبخیزداری؛ دانشکده کشاورزی و منابع طبیعی؛ دانشگاه آزاد اسلامی؛ واحد علوم و تحقیقات؛ تهران؛ ایران
عنوان مقاله [English]
Soil erosion has been known as a serious environmental problem. Drainage density is one of the most important geomorphological parameter that is used as an index for stream situation, rainfall, runoff, infiltration capacity, topography evolution and erosion. With knowledge about the relationship between characteristic basin with drainage density, we can predict the other properties of basin. The aim of this study was survey of relationship between soil and geology characteristics with drainage density. First, basic information was collected and watersheds boundary was found on topography map. Land component and geology map was prepared and in each land component was determined locations for profile. After field checking at determined location dug profiles and determine physicochemical parameters of soils. Drainage density was calculated using ARC GIS software. Finally using Excel 2013 through charting, the relation between soil characteristics with drainage density was determined and correlation of these factors were analyzed using SPSS software. Results showed that the relationship between soil properties and drainage density in formation and land component is significant at 95 percent level. Also results indicated that drainage density is affected by lithology of formation, slope, and some properties of soil such as TNV, silt, organic carbon and coefficient of erosibility. The maximum of drainage density belonged to quaternary formation without proper plant cover and NGM formation ad minimum of drainage density belonged to TUF and lime formation. Therefore, to some extent, with using of drainage density we can predict soil and geology properties.