Аннотация:Статья содержит важные итоги полевых и комплексных гидрологических исследований, проводившихся в дельте р.Лены с 10 по 16 августа 2022 г. Во время них были измерены 25 расходов воды и концентрации взвесей в речных водахе, отобраны пробы воды, образцы донного и берегового грунтов на гранулометрический и химический состав, отмечены размываемые берега. Целью исследований было изучение распределения стока воды и наносов Лены между дельтовыми рукавами, изменений мутности воды, гранулометрического и химического состава наносов от вершины к морскому краю дельты, по глубине и ширине потока, роли в них местных гидролого-морфологических и термоабразионных процессов. Полученные натурные данные необходимы для познания особенностей современного рассредоточения стока воды и наносов в огромной и многорукавной дельте Лены, его изменений с момента последних стационарных и экспедиционных измерений, для дешифрирования спутниковых снимков, разработки инструментария для пересчета поверхностных измерений в осредненные по сечению потока.Field hydrological measurements, held in the river Lena delta, took place from 10th to 16th of August 2022. 25 values of water discharge and 58 suspended sediment concentrations (SSC) were measured along with taking multiple chemical composition water samples, samples of bottom and bank river sediments and highlighting thermal abrasion coasts. Particle size and chemical composition analyzes of the sediment samples were carried out. The objective of the study was to estimate the water flow distribution in the delta and to determine the directional SSC, sediment particle size and chemical composition changes along the delta and inside the depth of the river flow, and define the roles of the local hydrological and morphological factors of river flow transformation. Moreover, field measurements are crucial for SSC estimation and monitoring based on satellite image data. The laboratory analyzes included particle size definition in suspended and bottom sediment samples, organic matter and SSC definition. August 2022 expedition results were compared to the previous surveys. It was established that the flow distribution around the Stolb island corresponds with the distribution in 2016: the Bykovsky, Trophimovsky, Tumatsky and Oleneksky branches receive 24.9–25.5, 58–59.2, 6 and 6.6% of water discharge from Kusur gauging station on Lena river. Meanwhile the role of the Main channel was slightly overestimated. The new data includes water discharges in the branches around Samoilovsky island and in the channel systems of Oleneksky and Tumatsky branches. SSC was relatively low and made up to around 12-24 mg/l, rising from the water surface to the bottom by 1.2-2 times. SSC was lowering along the course of Oleneksky and Tumatsky branches (by 1.5 and 1.1 times relatively) due to the ratio between SSC and potential stream transport capacity. SSC was rising along the course of Bykovsky branch, even though it wasn’t shown by the Landsat-8 satellite image (16th of August 2022). A significant sediment source in the delta are eroded end thermos eroded coasts of the island systems. Average sediment size appeared to be from 0.011 to 0.019 mm. The SSC doesn’t vary much around the main channel and the nearest branches. The important relations between SSC and optical turbidity and ADCP backscatter intensity were estimated. Coarse diameter of 30 bottom sediment samples was 0.46 mm. The largest sediments were discovered in the Bykovsky branch, while the smallest sediments were found in the smaller transverse branches. Along the Tumatsky and Oleneksky branches the bottom sediments alternate from fine to medium sands.