The 'Holtenau Ost' redevelopment area is 92 hectares in size, 14 hectares of which are water, and is one of the most important urban development areas in the state capital of Kiel. In addition to the former marine area MFG5, 'Holtenau Ost' also includes the operating site of the Waterways and Shipping Authority WSA Baltic Sea as well as further water areas. In 2014, the overall urban development measure was included in urban development funding by the state of Schleswig-Holstein, in 2016 the urban redevelopment measure was initiated, in 2018 the city decided on the integrated urban development concept and in 2021 started a planning competition. Based on the winning design, the planning of the area with 2,250 residential units, commercial space and leisure facilities has been continued since 2022. As part of the project, extensive interventions in the bank protection are planned, which require detailed technical planning and coordination with various stakeholders. The task of the AQUADOT engineering company is to act in an advisory capacity in the context of hydromechanical and hydraulic engineering issues.
The Baltic Sea Resort on Lake Kröslin is planning to build a jetty to anchor fourteen floating holiday homes to the north of the existing jetty. The Lake Kröslin is located in the estuary area of the Peene east of the village Kröslin. To support the structural design, the AQUADOT engineering company had to determine relevant wave parameters based on the determination of relevant wind conditions as well as the expected ice load in the planning area.
In the course of the urban development of the city port of Rostock, the Hanseatic and University City of Rostock is planning, among other things, the renovation of the quay edge in the area of berths 86 to 91. In addition, the flood protection for the area is to be expanded to the current design flood level for public flood protection.
Currently there is a concept that emerged as the winning design in a planning competition, which provides for a permanent flood protection wall with a crown height of +3.54 mNHN on the waterfront with a cycle path on the land side. The construction with a height of 1.64 m above the ground would lead to a permanent separation of the water and land-side areas of the waterfront. This would reduce the width of the promenade area with a direct connection to the shore and the existing and new buildings on the land side of the protective wall, commercial buildings, especially with restaurants and indoor and outdoor seating, would be separated from the water. The task of the variant consideration carried out by the AQUADOT Consultants was to summarize the natural boundary conditions for planning flood protective measures in the City Port of Rostock, to discuss the present draft for linear flood protection, and to develop, discuss and evaluate further designs and routes with regard to technical, logistical and urban planning aspects.
In the sea area in front of the former Naval Weapons Training School Ellenberg near Kappeln, a marina is to be built as part of the 'Schleiterrassen' project. In the course of the approval planning, the changes in the flow situation and morphodynamics to be expected from the planned structures were to be estimated on the basis of available planning data and investigations of the natural boundary conditions.
The Brunkowkai Wismar renovation project includes the construction of a set-back flood protection wall that protrudes 0.8 m above the ground with a structural extension reserve of 0.6 m. For the structural design of the flood protection wall, the unfavorable wave loads to be expected in the planning area and the resulting wave overflow rates had to be determined. In addition, the wave load to be expected in 'normal' water levels and wind situations at the berths in front of Brunkowkai should be estimated.
To protect the outlet structure on the Great Goitzschesee from silting up, a groyne in the form of a row of wooden poles was erected by the Lusatian and Central German Mining Management Company LMBV in 2017. The AQUADOT engineering company had to check the functionality of the structure in relation to the hydraulic conditions on site and to develop measures to improve the situation at the outlet of Lake Goitzsche.
In the course of the mining rehabilitation work, the open pit mine Roesa was integrated into the Goitzsche lake network by flooding as the Lake Seelhausen, with the flooding being completed in 2005. During the flood events of the Mulde in the years 2002 and 2013, there was a direct inflow of Mulde water into the open pit mine with partially significant bank changes. Securing measures in the central area of the north embankment carried out by the Lusatian and Central German Mining Management Company LMBV in 2003 were successful, but over the years cliff formations have occurred in the eastern area of the north embankment on the Loebnitz beach and in the western area of the south embankment. Here, the existing and still expected bank changes were to be assessed in detail and any necessary measures to secure the banks were to be developed.
In the Ocean's End project, the construction of two commercial and residential buildings is planned at the City Port of Rostock and thus directly on the banks of the Unterwarnow. In the course of planning, it was necessary to develop a private flood protection concept that was functional, technically and economically feasible also with the given short early warning time.
The expansion planning of the Vitalhotel Alter Meierhof in Meierwik/ Gluecksburg provides, among other things, for the construction of a footbridge. Before starting the detailed planning, it must be examined whether the planned structure will have an impact on the morphodynamics in the surrounding fjord area and, if so, what kind this will probably be. The AQUADOT Consultants made an assessment of the probable effects of the planned structure on the morphology of the coastal environment based on a detailed description of the natural boundary conditions in the planning area.
As part of a construction project at the Lake Graebendorf, a flooded open pit mine south-west of Cottbus, the construction of a floating dock system for sixteen floating houses is planned. The AQUADOT Consultants determined the wind conditions and sea loads relevant for structural design.
The Nordseeblick building in front of the public flood protection line, formerly used as a fish restaurant with holiday apartments, is being converted and extended by the Nordseeblick GmbH. In the course of planning the construction measure, specific design values for water levels and sea conditions had to be determined to ensure the necessary flood protection for the building itself and to ensure the functionality of the adjacent main dike line. In addition, a preliminary assessment of the required height of the flood protection wall south-east of the building serving as property protection was carried out.
The Westerland measuring pole in the sea area off Westerland/Sylt was erected more than 30 years ago and has since been operated by the Schleswig-Holstein State Office for Coastal Protection, National Park and Marine Protection LKN.SH. No major renovation work has been carried out since construction. In a safety check carried out in 2018, which was also related to a planned renewal of the measurement technology, defects in the design were identified. In cooperation with ITT Port-Consult Laboe, AQUADOT Consultants examined whether a renovation or a new construction of the measuring pole would be more economical under the given conditions and how the work should be carried out.
The construction of floating jetties with floating houses and boat berths is planned on Lake Ribnitz in front of Ribnitz-Damgarten. To support the structural planning carried out by ITT Port-Consult, the relevant ice load in the planning area had to be determined.
The urban shore and port facilities in Frankfurt am Main have a wide variety of construction methods from different construction periods as well as different maintenance and preservation states. For the short-term as well as medium- and long-term preservation of the stability and traffic safety of the plants, maintenance but also limited and extensive construction measures are necessary, which require specification and prioritization. In order to draw up a list of priorities and to develop information on maintenance and renovation, the available documents, in particular planning documents on the location of the facilities and reports from the 2016 main inspection of the municipal bank facilities in Frankfurt am Main, were viewed and the facilities were inspected from the water side.
The Kiel Fjord stretches far into the heart of the state capital of Schleswig-Holstein. A study area with heterogeneous spatial and usage structures stretches directly along the waterline, which exhibits various urban deficiencies. For the study area 'Kiellinie and Duesternbrooker Foerdehang', an assessment basis for the further procedure as well as an integrated development strategy was developed by complan municipal consultancy together with bgmr landscape architects, urbanus GbR and AQUADOT Consultants.
Within the elaboration of a feasibility study of the Marina Binz in Prora one major aspect is the impact of the harbor and the harbor entrance on the longshore sediment transport in the planning area and the question whether major maintenance dredging works will be necessary. Based on available data, a preliminary assessment of the longshore sediment transport in the planning area was executed.
Based on recent technical codes on type, extent and timing of required inspection and maintenance works the AQUADOT Engineering Company elaborated a guideline for inspection and maintenance of hydraulic structures in different coastal harbours in Northern Germany. Beside the definition of specific inspection and maintenance services for different materials and structural components the guideline contains indications for documentation and tender procedures of maintenance and rehabilitation works.
For improvement of the swimming conditions in the Seaside Resort at the Sund Promenade Stralsund the waterfront sheet pile wall was dismantled, a beach nourishment was executed and for prolongation of the retention time of sediments in the beach area wooden pile groins have been built at the southern and northern edge of the resort. Due to the tendency of silting up of the neighbouring recreational harbour the AQUADOT Engineering Company was commissioned to investigate the sediment transport in and around the Sea Resort Sund Promenade. The transport processes could be analysed and assessed based on bathymetric surveys, sediment examinations and current calculations.
In view of the aging hydraulic structures – approximately 30% of the German locks are already older than 100 years – effective inspection of waterfront structures and engineering constructions is getting more and more important. For the execution of main inspection works according to DIN 1076 at a waterfront stretch of more than 15 km along a federal waterway in urban environment the AQUADOT Engineering company worked out the required tender documents, examined the offers and supported the award of the contract. Subsequent to the execution of the inspection works, the inspection results of the single stretches have been evaluated, summarized and prioritised with respect to required rehabilitation and new construction works.
Within the conversion planning of different harbour facilities at the Lower Rhine the overall structural safety could be confirmed by static recalculations. Problems arised only for the proof of the rope force of 300 kN for a so-called Large Rhine Ship according to the EAU (Recommendations of the Committee for Waterfront Structures, Harbors and Waterways). Therefore, it has to be checked whether the local natural conditions allow a reduction of the applied rope forces or not.
After assessment of the site conditions the relevant rope forces have been assessed for different loading conditions and recommendations for action have been elaborated for different harbours.
Since the 1980s, a bathing site protected by a western and eastern jetty and a non-detached breakwater exists in Arnis at the Schlei. By now, a partly retreat of the strandline and a severe deposition of mud in a part of the bathing site is observed. Additionally, a sand deposit covers an area at the western jetty. To improve the bathing situation a remediation option had to be elaborated based on an assessment of the current morphological processes and a prognosis of future sedimentological and morphologic developments at the site.
Amongst others, the construction of a harbour basin is planned within the project 'Schleswig Auf der Freiheit'. The so-called Outer Harbour shall be built in front of the current coastline into the water body Schlei. For approval planning possible impacts of the utilisation of the water area have to be estimated.
The actual hydrological and morphological state was analysed and possible changes of currents and sediment transport processes in the wider project area caused by the planned measure have been assessed.
The assessment of the technical condition of hydraulic structures is based on structural inspections. As far as the condition found necessitates no further investigations and measures, the following annual cycle is valid in structural inspection work:
The Ingenieurgesellschaft AQUADOT offers a full service at all stages of inspection of hydraulic structures like moles and piers, revetments, quays, pontoons and their anchoring, dolphins, connecting bridges as well as service passages in piers and quays. All works are done by a team of highly qualified engineers of the fields hydraulic and coastal engineering, material testing and quality control and structural engineering as well as professional divers. Beneath the inspection work itself, the services include also the assessment of existing bearing capacities as well as the conception of repair and restoration works.
Im Zuge der bergbaulichen Sanierungsarbeiten in den Tagebauen Zwenkau und Cospuden bei Leipzig ist eine direkte Einleitung der Vorflut des Zwenkauer Sees in den Cospudener See zu planen und umzusetzen. Hierfür ist ein Verbindungskanal zwischen den Tagebauseen herzustellen, der seine Vorflutfunktion erfüllt und gleichzeitig mit Hilfe eines Schleusenbauwerks als schiffbare Verbindung dient.
Neben den durch die KUBENS Ingenieurgesellschaft mbH, Niederlassung Nürnberg, erarbeiteten Planungsleistungen für die schiffbare Gewässerverbindung Zwenkauer - Cospudener See wurden vom Vorhabenträger LMBV mbH Leipzig gutachterliche Leistungen zur Abschätzung der Sedimentdynamik vom Büro AQUADOT angefordert. Im Rahmen des Gutachtens waren die nach Füllung des Zwenkauer Sees und Öffnung des Verbindungskanals Zwenkauer - Cospudener See zu erwartenden Sedimentumlagerungen am Kanalbeginn und am Kanalende abzuschätzen sowie Aussagen zu ggf. erforderlichen Schutzbauwerken zu treffen. Letztere sollen einen sicheren und dauerhaften Betrieb der Gewässerverbindung zwischen den beiden Tagebauseen gewährleisten, in dem sie unerwünschten Erosions- bzw. Anlandungstendenzen an den folgenden geplanten Bauwerken entgegenwirken / Untersuchungsbereich Cospuden:
Zur Foto-Dokumentation 
Within the urban development of the urban area at the inland waterway Teltowkanal the construction of a leisure harbour is planned.
In 2012, the Consultant AQUADOT developed a rough concept of the harbour for elaboration of the master plan of the planning area. Based on that, the Institute for Hydraulic and Coastal Engineering at the University of Applied Science Bremen under the responsibility of Prof. Koppe worked out the basic design of the harbour including conception of waterfront structures, moorings and land facilities.
Within the planning of coastal power plants the Consultant AQUADOT assesses wave loads on water intake facilities of power plants and gives recommendations on the installation, e.g. at locations at the Indian Ocean and in the Caribbean. Some of the water intake facilities are integrated in vertical embankment constructions, some of them are installed in coastal waters connected to the land by submerged pipelines.
Within the port expansion planning of the Port of Wismar the terminal facilities of the 2nd construction phase will be extended in northerly direction. The planning considers mainly vertical quay wall constructions with sheet pile walls for the new berths 1A to 1D of the Port of Wismar as well as for the new quay berth of the Waterways and Shipping Authority Luebeck, branch Wismar, which substitutes the existing jetty.
Commissioned by the Port of Wismar the Competence Centre for Construction M-V in cooperation with AQUADOT examined the wave load in the planning area based on numerical / analytical calculation methods in the current situation as well as considering the planned quay wall layout and different kinds of structural wave load reduction measures. For assessment of reflection coefficients of different quay wall constructions physical model tests have been executed.
To secure safe handling conditions at the planned berths of the Port of Wismar and calm conditions at the facilities of the Waterways and Shipping Authority a preferred option for the layout of the planned quay constructions and wave protection was developed on the basis of the wave evaluations in the year 2011. In 2013, modified plannings have been checked with respect to wave loads at neighbouring mooring locations.
Within the installation or substitution of the existing hydroelectric facilities hydraulic verifications are necessary with respect to planned water extraction rates, hydraulic parameters of the feeder canal, and layout of the facilities considering flood water level neutrality as well as fish migration. For the latter, components like screen rack, fish barrier in the lower reach of the feeder canal and fish pass have to be designed properly to guarentee the migration of native fishes at different runoffs despite the existing transversal structures.
AQUADOT works out the required hydraulic verifications on the basis of theoretical approaches and/or measured hydraulic parameters.
Westerly the harbour Sassnitz a marina with touristic offer is in the planning stage. In the approval procedure the question arised which hydrodynamic changes will have to be expected due to the planned construction works.
AQUADOT examined analytically and numerically the hydrodynamic condition in the planning area for the current situation and for the situation including the planned jetty construction of the marina. Furthermore, a preferable construction alternative was elaborated to minimize wave reflection in front of the jetties. The examinations include the assessment of expected changes of hydrodynamic parameters like sea state, current, and ice drift as well as changes in the sediment-dynamics in the wider planning area.
Seaports play a major role in the seaborne transport system, being the interface between transport, storage and production as well as different transportation modes like transshipment, inland navigation, railway and road transportation.
The Port Olpenitz GmbH is converting the former naval port Olpenitz near Kappeln into a holiday resort including a marina. The construction works include amongst others the raise of ground level elevation, construction of waterfront structures as well as renaturation measures.
AQUADOT supports the works by providing the design of sloped waterfront structures using locally available armour stones. Furthermore, AQUADOT reviews the influence of deconstruction of military and civil used installations on the protection level against flooding and coastal decline. Additionally, morphological changes at the beach Weidefelder Strand south of the project area is monitored yearly by AQUADOT.
Climate change bears the potential of a significant and persistent impact on technical infrastructure. The effects will probably be widespread and costly in contrast to influences of regionally and temporary acting extreme weather conditions. Therefore, early involvement of climate change aspects in planning processes is important to relieve expected resource constraints.
Initiated by the Hamburg Port Authority, AQUADOT worked out a guideline for port planners and authorities as well as terminal operators to identify relevant climate change impacts on and vulnerabilities of seaport development and operation. Furthermore, climate change adaptation measures in seaports are described in detail.
The sensitive hull of superyachts as well as the crew's high convenience standards require a secure and comfortable mooring system. AQUADOT designed a mooring system for a 60 m superyacht at a relatively short quay in a marina in Croatia. Engineering includes the determination of effective mooring loads and design of deadweight sinkers.
The Northern Corniche in Jeddah is one of the main leisure destinations in Saudi Arabia, with the 12 km section of the Red Sea coastline used intensively for tourism and leisure activities by the local population with international hotel chains and entertainment centres lining the seafront. The Waterfront Development Plan includes numerous coastal engineering facilities like water taxi berths, marinas, pocket beaches, jetties, and bridges. AQUADOT collaborated in the elaboration of tender documents for the relevant hydraulic and coastal engineering works in the Waterfront Development Project. Within the project, AQUADOT analyses relevant design parameters for the layout of the required coastal protection works with respect to wind data, water levels, sea state, and currents.
For preparation and safeguarding of the future flood protection for the city of Hamburg it is necessary to assess the present safety levels, to point out possible weak spots and to consider the requirements on flood protection systems also with respect to climate change.
Within the analysis the safety against flooding in Hamburg was assessed on the basis of the height of existing flood protection measures and the acting forces due to design flood water level and waves. AQUADOT developed a software procedure for calculation of overtopping rates at dikes and vertical walls including different approaches according to EUROTOP, 2007.
The preliminary planning of marinas at the Baltic Sea and at lakes focussed mainly on the assessment of loads from water levels, waves, and currents. Furthermore, issues related to the layout of harbour entrance channels, berths and traffic ways as well as conservation of good water quality within the harbour basin have been dealt with.
The port and terminal operators of the Port of Bremerhaven have invested and will invest in future considerable financial means to enable a smooth handling of current and predicted cargo. With the reconfiguration of the Osthafen new berths and additional operation area have been created. In 2010, the extension of the Kaiser Sluice to an effective width of 55 m and length of 305 m will allow the passage of modern RoRo ships. Furthermore, four new berths for container ships have been provided with the completion of the CT4 in autumn 2008.
Besides the waterfront works relevant measures on the landside of the terminals and the reorganisation of the hinterland infrastructure are necessary. This includes rearrangements on container terminals, concerning especially storage areas and loading facilities for railway and truck as well as construction of new administration and social buildings. Furthermore, the terminal hinterland connections have to be embedded in an overall traffic concept of the Port of Bremerhaven requiring amongst others shiftings and reallocations outside the terminal areas.
AQUADOT collaborated in the preparation of a port infrastructure concept for the Port of Bremerhaven with special respect to container traffic.
AQUADOT collaborated in a planning for a preliminary design for stepwise extension works until 2036 at Muuga Harbour and Paldiski South Harbour, Estonia. The planning included the installation of new facilities for the handling of the following goods: oil products and liquefied natural gas, container, general cargo, bulk cargo like scrap metal, grains and fertilizers, bio diesel, vegetable oil and RoRo, especially cars.
AQUADOT collaborated in a planning of Prof. Brinkmann concerning the reorganisation of a main part of the Port of Hamburg. A multi-stage development plan was worked out for the container terminal Steinwerder with respect to traffic, hydraulic and economic conditions. For the final stage of extension an annual handling volume of 3.5 millions standard containers (TEU) was estimated.
Within the conversion of the Pier 1 North of the Rostock Port into a ferry terminal and due to a modernisation of motors and propellers of landing ships it was necessary to re-evaluate the scour situation at the quay.
Aquadot worked out recommendations for scour protection of the ferry terminal based on soundings and calculations of scour development with respect to berthing manoeuvres.
The development concept Sund Promenade envisages constructional changes of the shoreline stabilisation along the promenade in Stralsund. AQUADOT analysed the influence of the planned measures on shoreline stability and on safety against flooding. The rate of sediment transport was assessed and possible measures to increase the retention time of sediments in the system were developed. In addition, the influences of the planned measures on adjacent coastal stretches and on a rearward inactive cliff were assessed.
Hessian Academy for Flood Protection Measures, Flood Research and Life-Guard
Within the training course "Flood Protection Advisor" of the Hessian Academy for Flood Protection Measures, Flood Research and Life-Guard Aquadot developed and presented the program modules Hydromechanics, Flood Protection in Urban Environments and Mobile Flood Protection. These modules have been continuously updated and presented at the Hessian Academy for Flood Protection Measures, Flood Research and Life-Guard in Wiesbaden in the years 2004 to 2006.
The module "Hydromechanics" comprises the hydro-mechanic basics of hydrostatics and hydrodynamics.
The module "Flood Protection in Urban Environments" discussed specific problems of flood protection in populated areas which are associated with limited space, interferences of the protection line with infrastructure, object protection, contamination precautions and backwater in drainage systems.
In the module "Mobile Flood Protection" different mobile systems are introduced and their possible applications are discussed with respect to available early warning time, required personnel and financial ressources, loads, assembly, storage and maintenance.
