"Quality-assured ground data": The importance of data and information about waterbed has grown steadily in recent decades. They are in particular requested by maritime industry, planning offices, ecologists, but also by federal and state authorities to fulfill their tasks. The sea survey data and sedimentological data (sediment samples and side-view sonar recordings and maps) available from federal authorities and administrations are merged to form a quality-assured database-based simulation model of the water surface of the German Bight. Consistent area wide sedimentological and geomorphological base products, such as e.g. annual bathymetries are created.

"Analysis of ground data and derivation of products": This sub goal focuses on derivation of complex geomorphological products (depth differences, hypsometries, animations, maps of sediment properties). In addition, methods for spatial interpolation of particle size distributions depending on seabed facies and hydrodynamic system are improved, carried out and results are offered as products. By way of example, it should be examined to what extent a time variant surface sediment distribution can be calculated by combining morphological time series. Conceptual analyzes are also intended to capture relationships between ground data and hindcast modeling results. The results are classifications and descriptions of different types of seabeds according to ground physical, hydro- and sediment dynamic properties in form of maps and texts as well as resulting function as habitat, resource or subsoil.

"Data storage and publication": The easy accessibility and searchability of collected data and created products is an essential prerequisite for acceptance and use by target groups addressed in overall target. For this purpose, suitable previews and download components are developed and integrated into infrastructures of the established Internet portals in the business area of the BMVI.

Contact person: apl. Prof. Dr.-Ing. habil. Peter Milbradt

As part of the subproject EasyGSH-DB_Dialog of the joint project EasyGSH-DB, a participation process is organized and carried out by the company Küste und Raum over the entire duration of the project. A mutual exchange between partners of the consortium and potential users of data is used to organize a proactive mediation of demand and possible offers. The aim is to identify solutions for a representative selection of requirements together with potential users and to develop them in practice. The tasks of the company Küste und Raum are mainly aimed at communication between project consortium and stakeholders. In the first phase of the project, relevant stakeholders and their needs for products are identified in order to be able to develop selected products as prototypes in the second project phase as part of participatory product development.

Important target groups for use of marine geodata are federal, state and municipal administrations (Transport and environment ministries, coastal protection and environmental authorities, etc.), public institutions from research (oceanography, coastal engineering, environmental sciences, etc.), as well as the public, consisting of NGOs (environmental associations, environmental organizations, tourism, sailing association, etc.) and the economy (energy producers, engineering firms, fisheries, etc.). The aim is to include as many relevant groups as possible in the participation process.

To ensure this, an extensive analysis is carried out in the first phase of the process:

• which are already existing products that are currently available from project partners but also from other sources on the topics of geomorphological and hydrological baseline data,

• which relevant stakeholders for the German Bay area are to include. The degree of further involvement in the project is determined in consultation with consortium partners and willingness of identified stakeholders.

• needs of identified stakeholders. For this purpose, selected stakeholders are consulted in form of structured interviews and questioned about needs and existing deficits.

• identified product needs resulting from analysis of needs and deficits. In a coordination process conducted in collaboration with stakeholders and consortium partners, products (to be developed) are selected.

In the second phase of the project, participatory product development will be carried out for selected product needs based on analyse results. The goal is to develop applications and practicable solutions together with stakeholders. The previous phase of dialogue is mainly about close interaction between project consortium and users of the to be developed products. In order to develop user friendly products that are specific to respective needs, this exchange is organized in form of one on one discussions and workshops with respective stakeholders. In the subsequent phase of prototyping, further development into prototypical products for selected use cases takes place. The usability is ensured by an interactive vote on the basis of test runs, in which all consortium partners and relevant stakeholders are involved.

Contact person: Dr. Jürgen Meyerdirks

The tasks of Institute of Hydraulic Engineering of the Technical University of Hamburg (TUHH-WB) focus on model based determination and provision of quality assured temporally and spatially highly resolved hydrodynamic, morphodynamic conditions and salinity in the German Bight for the period 1996 to 2015 as basis for target group-specific applications. For this purpose, the model chain Telemac - Sisyphe - Tomawac is used as part of a multimodel approach, as well as the SWAN model for the sea state.
In addition to actual operation of models, an essential part of the work will be quality assurance of results by direct comparison with calculation results of BAW (see lead application). Within the scope of multimodel approach, the TUHH carries out three-dimensional simulations of hydrodynamics and seaway as well as salt and sediment transport with Telemac / Sisyphe / Tomawac. It is expected that ongoing comparison of work results in the project will produce quality assurance methods that can only be achieved on basis of ongoing comparisons of work results, and which will ensure that, in the future, for both the project partners and other institutions the quality of model results can be significantly improved.

The Telemac model chain used in this subproject of the TUHH consistently uses finite element method to solve equations of motion. Furthermore, multi-model approach (the model chain of the BAW uses the finite difference method) makes it possible to compare model performance of different model families.

Contact person: Prof. Dr.-Ing. Peter Fröhle

The subproject EasyGSH_ModPort is embedded in the mFUND joint project EasyGSH-DB and includes simulation runs and analyzes by BAW and TUHH. These form the basis for study of coastal hydrology issues and further investigations, which assume a spatially and temporally consistent basis of marine geo and hydrodynamics data. More specifically, work in this subproject focuses on the

• Creation of quality-assured simulation data on hydrodynamics, salt / sediment transport and sea state parameters,

• analysis of simulation data and derivation of products and

• data management and publication.

"Simulation data": To characterize dynamic conditions in the German Bight, hydrodynamic measurement data, which as a rule are only available selectively, spatially and temporally interpolated via simulation models and thus created consistent reference datasets for the natural habitat of the German Bight. Data are first considered for a period of 20 years (1996 - 2015), which represent a complete nodal cycle of partial tides of the moon (18.6 years). They describe a sufficiently recent period, which is already sufficient for many questions and planning tasks. In addition to actual basic data, derived, characteristic quantities are also merged.

"Analysis of simulation data and derivation of products": Both desired high spatial and temporal resolution and quality of simulation data allow a variety of characteristic analyzes of water level, flow, salt and sediment transport as well as sea state and thus their changes over the years. This also concerns analysis and statistical evaluation of frequencies of hydrodynamic variables and assignment of occurrence probabilities. For detailed characterization of tidal dynamics, harmonic constants of water level and flow are documented.

"Data storage and publication": The easy access to data and products compiled as a digital catalog is an essential prerequisite for acceptance and use by the addressed target groups. For this purpose, IT infrastructure components used at BAW and BSH must be further networked, metadata and data services adapted and expanded, and simple entry points, previews and download components integrated.

Contact person: Dr.-Ing. Andreas Plüß