Аннотация:The delta of Lena River is one of the biggest deltas in the world. The area of river’s Lena delta is the second one among Russian deltas and it is an important sedimentation barrier which declines delivery of suspended sediment into the Arctic Ocean. This study aims at assessment of long-term and seasonal changes of sediment budget in Lena delta based on remote sensing dataset. Landsat images since 1999 were applied during ice-free period, from June to September, were analyzed. The sediment concentration (SC) at the delta topset was compared with SC data at the outlets of: the Main, Olenekskaya, Tumatskaya, Trofimovskaya and Bykovskaya channels to calculate suspended sediment budget in delta. The SC was calculated based on the archive Landsat images (more than 50 images). The model with the high accuracy of sediment concentration’s detection was used for calculation of sediment suspensions. This model was based on calibration of pixels’ reflection power from the satellite images according to measured turbidity data in the middle Lena River.Literature analyses show that observations in this area of the river are not regular: measurements of the rates of discharge and runoff of sediments are taken place only in the period of ice-free period at the delta topset (Stolb Island) during summer field works. Annual sediment load transport rates along the main branches of the delta are calculated in our study with method which is based on data about rates of discharge and obtained SC datasets, which are detected along the delta arms. We also estimated the accumulation of the sediments in river’s Lena delta. The fact, that sediment suspensions play critical role in the microelements-transfer, means that these estimates can help to estimate special aspects of biochemical balance of the delta.