EDoM measurement campaign: settling velocity and grain size

In 2018 and 2019 field surveys were conducted to better understand water and sediment exchamge mechanisms between the lower Ems River and the outer Ems estuary. In order to capture the contrasting conditions resulting from river discharge variability, two measurement campaigns were defined: one in August 2018 (local summer with relatively low river discharge) and one in January 2019 (beginning of the wet winter conditions). The collected dataset comprises (per campaign) of 10 observation locations measuring for at least one spring-neap tidal cycle (2 RWS frames RS, 5 bottom mounts BM, and 3 mooring chains MC) 8 simultaneous 13-hrs observations (including fixed stations SB, cross-channel transects CS, and one longitudinal transect). This dataset provides data on settling velocity and grain size collected with a floc camera in 2018 and 2019 (station EMD) and a LISST in 2018 (station KNO).

2018至2019年间，为深入探究埃姆斯河下游与埃姆斯河口外域之间的水沙交换机制，研究团队开展了野外实地调查。为捕捉因河流径流量变化所引发的迥异水文条件，研究设计了两场观测任务：一场于2018年8月开展（当地夏季，河流径流量相对偏低），另一场于2019年1月实施（对应湿润冬季的初始水文阶段）。所收集的数据集按每场观测任务统计，包含10个观测点位，各点位至少完成1个大小潮周期的观测，其中涵盖2个RWS框架（RS）、5个底置式安装座（BM）以及3个锚链系泊装置（MC）；同时完成8组同步的13小时观测，观测覆盖固定监测站（SB）、跨河道断面（CS）以及1条纵向河道断面。本数据集包含2018至2019年利用絮凝相机在站位EMD采集的沉速与沉积物粒度数据，以及2018年利用LISST在站位KNO采集的对应观测数据。