DESCRIPTION

The dam is located on the Oued Ougar, a right bank tributary of the Oued Tamri, about 60 km as the crow flies from the city of Agadir. It is a 65 m high arch dam on a foundation. It allows to control a catchment area of 1258 Km2, and to create a reservoir of 110 Mm3 regulating a volume of 27.5 Mm3 per year.

The Dam Prince Moulay Abdellah aims at satisfying the drinking water needs of the city of Agadir and of the centers and localities along the feeder pipe. The project includes the following main components:

1. The Main dyke: The dam is located on the Oued Ougar, a right bank tributary of the Oued Tamri, about 60km as the crow flies from the city of Agadir. It is a 65 m high arch dam on a foundation. It allows to control a catchment area of 1258 Km2, and to create a reservoir of 110 Mm3 regulating a volume of 27.5 Mm3 per year.
2. Potable water supplies: The project of adduction of the dam to the city of Agadir consists of the realization of the following main works:

• A run-of-river raw water intake consisting of a concrete weir,
• A water treatment plant with a capacity of 700 l/s,
• Installation of 67 km of pre-stressed concrete pipes with a diameter varying between 1000 and 1200 mm,
• Construction of three pumping stations and loading tanks.

INSPECTION

The inspection of the dam was made on January 18th, 2023. The Dam Prince Moulay Abdellah is one of the case study of the project and aims at satisfying the drinking water needs of the city of Agadir and of the centres and localities along the feeder pipe. Firstly, the technical drawings and all detailed facts about the dam were discussed. Next the inspection of all parts of the dam was done: dilatation sensors, inspection tunnels etc.

PATH DESIGN SCENARIO FOR UAV INSPECTION

The oblique mode is used to scan the dam on the river. The first flight contains four flight paths over the dam with a fixed altitude of 50 m above the starting point. The flight covers an area of almost 30.000 m² with 61 photos to make an RGB map over the points gathered by LiDAR. The estimated execution time for this part of the mission is 7 minutes and 13 seconds.

The following flight paths cover scanning the dam with a gimbal angle of 45 degrees. The duration of flights is similar. In Figure 2, the green line shows the active scanning part of the flights. It is visible that it begins before the scanned area.

The full mission takes approximately 35 minutes. With normal working conditions, it is done in one flight without the need for battery changing.

MODEL

Dam modeling required the topographic surface’s reconstruction to recreate the dam-terrain system’s trend. The Digital Elevation Model, containing the information related to the altimetric dimensions of the site, was imported into the GIS software to reconstruct the contour lines of the topographic surface within the three-dimensional modeling program. Subsequently, all the data for the project has been imported into the BIM environment. The integration of the BIM model with the FEM model was achieved using the ProtoTech Solutions plug-in, allowing to perform a finite element analysis. Furthermore, the most comprehensive information regarding the current sensor network installed on the dam has been analyzed and finally included in the BIM model. The monitoring information includes the type and placement of sensors, such as strain gauges, direct and reverse pendulums, accelerographs, and other relevant technical information.

PHOTOGALLERY