Aswan Dam assumption did not take into account the extent of perennial irrigation that was already present throughout Egypt decades before the high dam closure. By the 1950s only a small proportion of Upper Egypt had not been converted from basin (low transmission) to perennial (high transmission) irrigation. Expansion of perennial irrigation systems in Egypt did not depend on the high dam. In fact, within 15 years of the high dam closure there was solid evidence that biharzia was declining in Upper Egypt. S. haematobium has since disappeared altogether. Suggested reasons for this include improvements in irrigation practice. In the Nile Delta,
Hanabanilla Dam Hanabanilla Dam The Hanabanilla Dam is an embankment dam on the Hanabanilla River near the village of El Salto del Hanabanilla in Villa Clara Province, Cuba. The purpose of the dam is to provide water for irrigation and municipal uses and to generate hydroelectric power. The dam withholds a reservoir of and the power station, located near its base, has an installed capacity of 43 MW. It is the largest hydroelectric power station in the country. Near the southern end of the reservoir is Jibacoa Dam, an auxiliary dam, which closes off one valley to create the existing large reservoir.