Bathymetry and Velocity Data from Surveys at Highway Bridges Crossing the Missouri River between Kansas City and St. Louis, Missouri, January 2010 through May 2017

These data are high-resolution bathymetry (riverbed elevation) and depth-averaged velocities in ASCII format, generated from hydrographic and velocimetric surveys near highway bridge structures over the Missouri River between Kansas City and St. Louis, Missouri, for dates ranging from 2010 to 2017. Hydrographic data were collected using a high-resolution multibeam echosounder mapping system (MBMS), which consists of a multibeam echosounder (MBES) and an inertial navigation system (INS) mounted on a marine survey vessel. Data were collected as the vessel traversed the river along planned survey lines distributed throughout the reach. Data collection software integrated and stored the depth data from the MBES and the horizontal and vertical position and attitude data of the vessel from the INS in real time. Data processing required computer software to extract bathymetry data from the raw data files and to summarize and map the information. Velocity data were collected using an acoustic Doppler current profiler (ADCP) mounted on a survey vessel equipped with a differential global positioning system (DGPS). Data were collected as the vessel traversed the river along planned transect lines distributed throughout the reach. Velocity data were processed using the Velocity Mapping Toolbox (Parsons and others, 2013), and smoothed using neighboring nodes.

本数据集为ASCII格式的高分辨率水深测量（河床高程）数据与深度平均流速数据，采集时段为2010年至2017年，覆盖区域为美国密苏里州堪萨斯城与圣路易斯之间的密苏里河沿岸公路桥梁附近区域，数据源自水文测量与流速测量作业。水文数据采用高分辨率多波束测深制图系统（multibeam echosounder mapping system, MBMS）采集，该系统由搭载于海洋测量船的多波束测深仪（multibeam echosounder, MBES）与惯性导航系统（inertial navigation system, INS）组成。测量船沿覆盖研究河段的规划测量航线航行完成数据采集，数据采集软件可实时集成并存储来自MBES的水深数据，以及来自INS的测量船水平、垂直位置与姿态数据。数据处理阶段需借助计算机软件从原始数据文件中提取河床高程数据，并对相关信息进行汇总与成图。流速数据采用搭载差分全球定位系统（differential global positioning system, DGPS）的测量船搭载的声学多普勒流速剖面仪（acoustic Doppler current profiler, ADCP）采集。测量船沿覆盖研究河段的规划断面航线航行完成数据采集。流速数据经流速制图工具箱（Velocity Mapping Toolbox，Parsons等，2013）处理，并通过邻节点进行平滑处理。