据日本《电力土木》1986年第201号报导,日本八久和坝为一混凝土重力坝,高96.7米,水库有效库容3191.3万立米。1958年开始蓄水以来,年年淤积;自1973年起,每年在进水口前缘进行疏浚,将疏浚的泥沙堆积在水库上游河滩上,直到1984年累积疏浚的泥沙约为74万立米,因而产生了新问 According to Japan’s “Electricity Civil Engineering” 1986 No. 201 reported that Japan for eight months and dam is a concrete gravity dam, 96.7 meters high, the reservoir capacity of 31.913 million cubic meters. Dredging has been carried out annually since 1958 when water began to accumulate. Since 1973, dredging has been carried out each year at the inlet of the inlet to dredge the dredged sediment on the upper reaches of the reservoir until the accumulated sediment dredged in 1984 was about 740,000 m 3 , Resulting in a new question