<Ul> <Li> 1960: Start of construction on 9 January </Li> <Li> 1964: First dam construction stage completed, reservoir started filling </Li> <Li> 1970: The High Dam, as - Sad al -' Aali, completed on 21 July </Li> <Li> 1976: Reservoir reached capacity . </Li> </Ul> <Li> 1960: Start of construction on 9 January </Li> <Li> 1964: First dam construction stage completed, reservoir started filling </Li> <Li> 1970: The High Dam, as - Sad al -' Aali, completed on 21 July </Li>

Which of the following is a problem created by the construction of the aswan high dam