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
Abu Simbel temples On the south and the north walls of this chamber there are two graceful and poetic bas-reliefs of the king and his consort presenting papyrus plants to Hathor, who is depicted as a cow on a boat sailing in a thicket of papyri. On the west wall, Ramesses II and Nefertari are depicted making offerings to god Horus and the divinities of the Cataracts — Satis, Anubis and Khnum. The rock cut sanctuary and the two side chambers are connected to the transverse vestibule and are aligned with the axis of the temple. The bas-reliefs on the side walls of