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,
Pangani Falls Dam Pangani Falls Dam Pangani Falls Dam is a dam in Tanzania, which is part of the Pangani Hydro Systems. The dam is located at Koani in the Muheza District of the Tanga Region, about 8 km south of another power station at Hale. The Pangani falls power station has two turbines and has an installed capacity of . Construction of the dam began in December 1991 and was commissioned quickly just 3 years later to aid the ailing power shortages in the country. The entire project was funded by European Scandinavian nations (Norway, Finland and Sweden), which jointly decided to