from the Adamawa and then through the far northeast of the area before entering the East Province to join the Lom (the upper Sanaga). The Djérem, like the Sanaga, is also subject to seasonal flooding. The Kim flows in from the Adamawa and through the northwestern portion of the Mbam division before merging with the Mbam River at the border with the West Province. The Mbam then empties into the Noun. The Noun, which flows in from the West Province, passes through the town of Bafia, and receives the flow of the Ndjim River north of Goura. The Noun then joins the Sanaga northeast of Monatélé. The Nyong is the only major river in the province that does not flow into the Sanaga. It rises in the East Province, passes through Mbalmayo, continues west, then forms the border between the Littoral and South provinces. Because the Nyong flows completely through an equatorial climate, it has one period of high water during the rainy season (March to October), during which it is navigable from Mbalmayo to Abong-Mbang in the East Province. Other Centre Province rivers flow through both equatorial and tropical climate zones where rainy seasons occur at different times, and so they never experience great fluctuations in water level. All Centre Province rivers empty into the Atlantic Ocean via the Littoral and South. Most of the Centre's great demand for electricity is supplied from hydroelectric centres in neighbouring provinces. However, plans are in place for a dam on the Nyong at Njock-Mpoume and on the Sanaga at Nachtigal to better supply the region's power needs. Most lakes in the Centre are manmade and located in the Yaoundé area. The majority of these were created during the colonial period for the pursuit of water sports. Relief The Centre Province is entirely situated on the South Cameroon Plateau. The land varies from 500 to 1000 metres above sea level except for the valleys of the Sanaga and its tributaries, which dip as low as 200 metres. The land rises gently in escarpments from the southwestern coastal plain before joining the Adamawa Plateau via depressions and granite massifs. The terrain is characterised by rolling, forested hills, the tallest of which have bare, rocky tops. Deep valleys separate these. The province's highest point is Mbam Minkom, northwest of Yaoundé, at 1,295 metres. Climate The Centre falls completely within a Type A or Guinea-type climate.