Reservoir re-housed, historical artifacts moved or rare environments relocated. Examples include the temples of Abu Simbel (which were moved before the construction of the Aswan Dam to create Lake Nasser from the Nile in Egypt), the relocation of the village of Capel Celyn during the construction of Llyn Celyn, and the relocation of Borgo San Pietro of Petrella Salto during the construction of Lake Salto. Construction of a reservoir in a valley will usually need the river to be diverted during part of the build, often through a temporary tunnel or by-pass channel. In hilly regions, reservoirs are often constructed by
Lotfy El Tanbouli resident archaeologist during the transferring of the two temples of Abu Simbel to higher ground (1964–1968). He organized the first Negro festival in Dakar, the African art festival in Lagos, the exhibition of Ramses II in Paris (1976) and the ancient Egyptian Queens and Kings exhibition in Japan (1978). The Egyptian section of the military museum in Cairo and Port Said was organized by Tanbouli. Publications: The complete scientific publication collection: The small temple of Abu Simbel (two parts). The scientific collection of the temples: Garf Hussein Temple, the second, the third and the fourth parts. The scientific booklets collection: