Hydrographic Measurement System

几十年来，多传感器系统被应用于水文测量，典型的是与测深仪和定位系统一起获得水深测量。随着传感器和计算机技术的最新发展，这种系统已经发展到复杂的多传感器系统。近年来，技术的改进使这类水文测量系统得到了更广泛的应用。哈芬城大学汉堡分校(原汉堡应用科学大学)的研究人员30多年来一直活跃在水文学领域。自2019年以来，胡志明市拥有DVOcean测量船，作为水文测量系统的平台。其尺寸(8米x 2.5米x 0.8米吃水)针对浅水进行了优化，并允许使用定制的拖车将其运送到更偏远的调查区域。DVOcean将从事跨学科研究，不仅在广泛的大地测量领域，而且还在建筑环境科学(例如土木工程)、地球科学、自然科学和其他领域的应用方面为调查做出贡献。为此，将扩大或重新建立现有的合作。在这种合作中，将获取、处理、分析和解释数据(例如，监测河流和海床的变化和建造、栖息地测绘)。此外，将应用和改进数据驱动的方法(例如，自动分割和分类)。此外，水文测量系统本身将得到优化(例如，关于校准和校准程序、定位算法)。为了实现计划中的研究项目，需要一个具有一定功能的水文测量系统。DVOcean的这种多传感器系统需要提供地理参考的水文信息，其中不仅包括水深数据，而且还包括例如水柱和上层沉积物的信息。因此，该系统由多波束回声测深仪(MBES)、海底剖面仪(SBP)、具有CTD功能的声速剖面仪(SVP/CTD)、GNSS天线和惯性导航系统(INS)组成。

Since decades, multi-sensor systems are applied in hydrography classically with echosounder and positioning systems to acquire bathymetry. With the latest developments in sensor and computer technology, such system have been advanced into complex multi-sensor systems. The technical enhancement have resulted in a broader field of applications for such hydrographic measurement systems within the recent years. Researchers of HafenCity University Hamburg (HCU) (formerly Hamburg University of Applied Sciences / HAW) have been active within the area of hydrography for more than 30 years. Since 2019, HCU owns the survey vessel DVocean as a platform for a hydrographic measurement system. Its dimensions (8 m x 2.5 m x 0.8 m draft) are optimized for shallow waters and allow transportation with the customized trailer to more remote survey areas. The DVocean will be engaged in interdisciplinary research and contribute to investigations not only in the broad field of geodesy but also in applications of science of the built environment (e.g. civil engineering), geoscience, natural science, and others. For this purpose, current cooperation will be extended or newly established. In such cooperation data will be acquired, processed, analyzed, and interpreted (e.g. monitoring of river and seabed changes and constructions, habitat mapping). Additionally, data-driven methods will be applied and improved (e.g. automatic segmentation and classification). Furthermore, the hydrographic measurement system itself will be optimized (e. g. regarding calibration and alignment procedures, positing algorithms). To realize the planned research projects a hydrographic measurement system with certain functionalities is required. This multi-sensor system for the DVocean needs to provide georeferenced hydrographic information which includes not only bathymetric data but also information of the water column and upper sediment layers for example. Therefore, the system consists of the components multibeam echo sounder (MBES), sub-bottom profiler (SBP), sound velocity profiler with CTD functionalities (SVP/CTD), GNSS antennas, and inertial navigation system (INS).