Data from the research on hydrodynamic characteristics of the macrotidal estuary of the Semzha River (White Sea basin)

The Semzha is a small river that flows into the Mezen estuary (the White Sea basin). Its estuary is characterized as macrotidal with a tidal range at the mouth of 7-8 m. The river length is 63 km and its tidal limit (farthest point where the tidal water level fluctuations are observed) is approximately 21 km. This dataset includes water level measurements at multiple locations along the estuary (0.16 km, 3.6 km, 4.5 km, 8.12 km, 17.7 km) and discharge measurements at two cross-sections (3.6 km, 4.5 km). The measurements were conducted from 13/08/2018 to 16/08/2018 by scientists from Lomonosov Moscow State University and Zubov State Institute of Oceanography. Water levels were measured using automated water level loggers (Solinst and Keller) with measurement frequency of 1 minute. JAVAD GNSS receivers were used for linking the water levels into a uniform vertical coordinate system. Discharge measurements were performed using Acoustic Doppler Current Profilers (ADCP) RiverRay by Teledyne.谢姆扎河（Semzha）是一条汇入梅津河口湾（白海水系）的小型河流。该河河口湾属于强潮型，口门处潮差达7至8米。河流全长63千米，其潮区界（即观测到潮汐水位波动的最远端）约为21千米。本数据集包含河口湾沿线5处测点（0.16千米、3.6千米、4.5千米、8.12千米、17.7千米）的水位观测数据，以及两个断面（3.6千米、4.5千米处）的流量观测数据。本次观测于2018年8月13日至2018年8月16日开展，由莫斯科罗蒙诺索夫国立大学与祖波夫国家海洋学研究所的科研人员完成。水位观测采用Solinst与Keller品牌的自动水位记录仪，观测频率为每分钟1次。本次观测使用JAVAD GNSS接收机将各测点水位归算至统一垂直坐标系。流量观测采用Teledyne公司生产的声学多普勒流速剖面仪（Acoustic Doppler Current Profilers，ADCP）RiverRay完成。