The Nyong is a river in southern Cameroon, 690 km long and flowing into the Gulf of Guinea.
Geography
OpenStreetMap
The Nyong originates 40 km east of the town of Abong-Mbang in the great equatorial rain forest. It runs parallel to the lower reaches of the Sanaga River, like it following an east-west direction. It passes through the town of Mbalmayo. It empties into the Gulf of Guinea at Petit Batanga a village 65 kilometers south-southwest of Édéa .
Rapids intersect its course at Mbalmayo and Dehane. You can find a specie of fish called Kanga in this river.
Hydrometry
The flow of the river was observed for 26 years (1951-1977) at Dehane, a locality located some 54 kilometers from its mouth in the ocean.
At Dehane, the average annual flow or module observed over this period was 446 m3/s for a studied area of 26,400 km2 i.e. more than 90% of the totality (27,800 km2) of the watershed of the river.
The sheet of water flowing into the watershed thus amounts to 533 millimeters per year which must be considered high. Essentially a rainforest stream, the Nyong is an abundant and well-fed river. There are two periods of flooding, the first at the end of spring (in May-June), the second which is by far the most important, in autumn (from September to November). Of the two intermediate periods of low water, it is that of the end of winter which is the most pronounced (February-March). The average monthly flow observed in February (low water minimum) reaches 145 m3/s, more than six times less than the average flow for the month of October (926 m3/s), which shows a significantly greater amplitude of seasonal variations than that of the Gabonese Ogooué or the Congolese Kouilou. for example, Over the 26-year observation period, the minimum monthly flow was 40 m3/s while the maximum monthly flow was 1,226 m3/s.
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