Yonki fisherfolk: report of a survey among people fishing at Yonki Reservoir, upper Ramu River, Eastern Highlands Province
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In January 1991 the dam built for electric power generation at Yonki township in the upper Ramu was closed. This started the flooding of grasslands, gardens and coffee plantations in the Arona Valley. In November 1991 the reservoir, which is at 1260 meters above sea level, reached the Full Supply Level and water started to flow over the spill way. At this level the reservoir covers an area of 2200 hectares. The shoreline of the reservoir is very dendritic and has an approximate length of 50 to 6 0 km. The new reservoir is the biggest water body in the high altitude region (i.e. > 1000 m above sea level) of the Sepik-Ramu catchment area. According to the 1990 National Population Census 9179 people live in census units within approximately 6 km from the reservoir, of which 2631 live in Yonki Township. Figure 1 shows a map of the reservoir with Yonki township and some of the nearby villages.