The sedimentary of estimated with (SRD) method in Sanghaneh kallat basin (northeast of IRAN)

Soil erosion and sediment transport to waterways are among the most important environmental problems and concerns in sustainable development and play an important role in formulating watershed management strategies. Knowledge of sediment delivery ratio is important for effective implementation of soil conservation and watershed management programs. In this regard, choosing the appropriate model for estimating sediment delivery ratio can be an appropriate tool for calculating erosion amount to implement erosion control and containment programs in the watershed. The erosion and sediment measurement plots have been installed at Kalatan Sangat Research Station since 2006 and during this time the exclosure area has been enclosed and all data recorded accurately after each thunderstorm and rainfall. In this study, 10 experimental models of sediment delivery ratio estimation were compared with real data recorded at Sanganeh station. The results showed that Williams model with relative error of 19.72% is the most suitable method for estimating SDR in Kalanat area in Khorasan Razavi province with semi-arid to dry climate.