Aswan Dam insignificant compared to what is needed to reach the yields achieved today in Egypt's irrigation. Also, the annual spread of sediment due to the Nile floods occurred along the banks of the Nile. Areas far from the river which never received the Nile floods before are now being irrigated. A more serious issue of trapping of sediment by the dam is that it has increased coastline erosion surrounding the Nile Delta. The coastline erodes an estimated per year. Before the construction of the High Dam, groundwater levels in the Nile Valley fluctuated 8–9 m per year with the water level
Toktogul Dam day. Toktogul Dam Toktogul Dam is a hydroelectric and irrigation dam on the Naryn River in the Jalal-Abad Province of Kyrgyzstan. It is concrete gravity dam with height of and length of . It is a part of the Naryn-Syr Darya cascade. It is named after Toktogul Satilganov. The Toktogul Hydroelectric Station has installed capacity of 1,200 MW, which makes it the largest power plant in the country. It has four turbines with capacity of 300 MW each. Toktogul Reservoir (, ; ) is the largest of the reservoirs on the path of the Naryn River, a northern tributary of