A 3D scale model of a Nigerian beach near Lagos has been put through its paces this month in our state-of-the-art modelling hall. New coastal defences are needed where the beach has retreated at the residential Maiyegun beach estate following major development farther along the coast. CDR International, the designers of the coastal protection scheme, asked HR Wallingford in the UK to build the model to show how the proposed sea defences would influence the response of the beach.
In association with DYNACO and Centre for Infrastructure Consulting (CIC), CDR International is providing marine design services for the design and construction of a new ferry landing at Wanseko, Lake Albert, Uganda. These works are part of a larger plan of the Uganda National Roads Authority (UNRA) to upgrade the road system in the country. This ferry line is a key link to cross the lake (160 x 30km in area) between Wanseko and Panyimur.
The consortium of IMDC, CDR International, Rebel Group and ADK has been awarded the Feasibility Study for Deferred and Performance Based Maintenance Dredging of the Odaw Channel and Korle Lagoon in Ghana. The overall project objective is to contribute to achieving 1 in 10 years flood protection (T10) in the primary Odaw channel system, by preparing a ready-to-tender Performance Based Contracting (PBC) investment that will be financed as part of the broader World Bank GARID programme. The kick off took place mid-May.
CDR International in association with Shore Monitoring and Research defined an integral full survey campaign for the lower basin of the Msimbazi River, which was executed last February. This World Bank funded survey project serves two purposes: 1) generation of reliable, accurate and fit for purpose bathymetric & topographic data of the Msimbazi River and its floodplanes for riverine flooding related detailed studies, and 2) rigorous comparison of Digital Terrain Model (DTM) generation by Unmanned Aerial Vehicle (UAV; drones) Photogrammetry and UAV LiDAR. Traditionally LiDAR aerial acquisition methods for obtaining DTMs are done by planes. With the development of equipment, the LiDAR scanners are getting smaller and lighter, and drones can fly longer and can carry more weight, enabling to mount LiDAR scanner to drones. This potentially provides significant cost savings compared to both traditional LiDAR and field surveying methods. A meticulous comparison for the Sub-Saharan African context was however lacking. This study will recommend on when to use which surveying methods with respect to purpose, project area size, landuse/vegetation cover and challenges like import of equipment.
Preliminary insights of the analysis have been shared and presented recently at a master class at the Land and Poverty Conference 2019 – March 25-29, 2019 Washington, DC and at a workshop on DTM drone applications for Dar es Salaam stakeholders at World Bank Office in Dar es Salaam on April 11th, 2019.
The Msimbazi Opportunity Plan has been completed and has been signed by Minister of State Mr. Selemani S. Jafo of the President’s Office Regional Administration and Local Government. This is a very important next step towards implementation of the proposed interventions. CDR International is proud to have contributed to this World Bank funded innovative participatory design process as part of the Consultant’s Consortium.
The Managing Director of CDR International BV, Dirk Heijboer, and his team, and our partners, presented CDR’s Inception Report for the UNDP – Green Climate Fund funded project: “Engineering and Safeguards Assessment of Proposed Interventions in the coastal areas of the Monrovia Metropolitan Area (MMA) in Liberia“. The President of Liberia, George Weah, was also present amongst distinguished guest of the UNDP, GCF, EPA (Environmental Protection Agency) and other important stakeholders.
The press published various articles on the subject with drone pictures made by CDR International.
–> Monrovia Faces Imminent Disaster
–> Liberia: Preliminary Study Depicts Scary Pictures of Imminent Disaster in Monrovia
–> Monrovia Threatened by Rising Sea Level, Others
–> Monrovia Faces Imminent Disaster; EPA Alarms following Coastal Engineering Assessment
For further details, see the project summary –>
Last month the 3rd design charrette on a plan for the Msimbazi River basin has taken place in Dar es Salaam, Tanzania. This project consists of 2 stakeholder workshops and 6 design charrettes that are being organised in a half a year’s time. The objective of the design charrettes is to develop, together with all stakeholders and communities, a stratgic management framework for the entire catchment area of the Msimbazi River basin as well as a detailed plan for the lower part of the catchment. CDR International is part of a consortium to facilitate this special participatory design process which is funded by the World Bank. Charrettes are particularly suitable to address complex multi-facetted and interrelated social, technical and environmental issues.
The Msimbazi River basin, covering a large part of Dar es Salaam’s urban area, is characterised by extreme high (informal) urbanisation rates, crossing of major infrastructures, a mosaic of different urban land uses and a whole range of environmental and sanitation issues. One of the main issues is the increasing severity and frequency of flash floods affecting the area. The actuality of the problems was underlined by a heavy flood event that took place one day before the 3rd design charrette.
Through these charrettes we work together on a plan for a better living environment in the Msimbazi River basin.
RVO has granted CDR a DHI subsidy for the feasibility study for the refurbishment and renovation of the Port of Alexandria in Egypt. The port currently does not meet the Alexandria Port Authority’s objectives to facilitate vessels with a draft greater than 10m. In order to meet this ambition, a large-scale renovation of the port is required. This includes the deepening of the harbour basin and the replacement of frame walls and associated superstructure (cranes, etc). The study provides insight into the technical, financial and economic feasibility of an investment in new port infrastructure for a future loan.
On November 9th, Ruben Borsje has started his internship at CDR International as Project Engineer in Nigeria. As part of a unique project, the Sandbar Breakwater at Lekki, he will be monitoring the construction of the sandy features, as well as part of the rock works. He will be using 2D modelling to assess and predict the changes in morphology of the Sandbar, in the end leading to a better understanding of these kind of structures.
Ruben’s internship is part of his MSc. Hydraulic Engineering degree at the Technical University of Delft (the Netherlands), specializing in Coastal Engineering and Environmental Fluid Mechanics. His main interests are large-scale coastal morphology, building with nature, and the numerical modelling of these phenomena, preferably combined in a design and construction environment. The Sandbar Breakwater project is therefore a perfect match.
Last summer he went to the coastal area of Demak, Indonesia, as part of a research project of the Technical University of Delft. The project focused on the restoration of the heavily eroding mangrove-mud coast, for which Ruben explored the use of drones for the assessment of the effectiveness of already implemented solutions. The gained experience in monitoring techniques in combination with coastal morphology are of much value for his current internship.
The internship at CDR International provides an opportunity to get some hands-on experience with the engineering of a new and unique project, regarding the design as well as the working environment, and Ruben is very much looking forward taking on this challenge.
The project kicked-off in October 2017 and completion is expected around May 2018. CDR and its partners, REBEL and UNESCO-IHE, are organizing workshops, execute the Vulnerability Analysis; Feasibility Study; Preliminary Environmental and Social Impact Analysis (ESIA), arrange for Technical Assistance / Training and submit all deliverables in comprehensive reports.
See project –>