CAJ | 학술논문

1986年以来，潼关水量和沙量大幅减少，洪峰少，流量小，历时短，含沙量高。1986～1999年汛期平均水量120亿m3，比前期减少40%～60%。日平均流量大于3000m3/s的出现天数和水量均减少90%以上。沙量变化较小，含沙量成倍增加，致使潼关高程汛期平均下降幅度明显偏小，比非汛期上升值偏小0.10m。比建库前汛期平均下降值偏小0.08m。若与控制运用初期相比，则偏小0.30m。为了适应入库水沙条件的不利变化，水库运用方式多次进行调整和改善，但河床淤积仍较1985年前严重，潼关高程逐年上升。尤其1994年以来，入库水沙量在前期大幅减少的基础上又有明显减少。潼关高程居高不下，长期变动在328.00～328.35m之间。
1986년이래，동관수량화사량대폭감소，홍봉소，류량소，력시단，함사량고。1986～1999년신기평균수량120억m3，비전기감소40%～60%。일평균류량대우3000m3/s적출현천수화수량균감소90%이상。사량변화교소，함사량성배증가，치사동관고정신기평균하강폭도명현편소，비비신기상승치편소0.10m。비건고전신기평균하강치편소0.08m。약여공제운용초기상비，칙편소0.30m。위료괄응입고수사조건적불리변화，수고운용방식다차진행조정화개선，단하상어적잉교1985년전엄중，동관고정축년상승。우기1994년이래，입고수사량재전기대폭감소적기출상우유명현감소。동관고정거고불하，장기변동재328.00～328.35m지간。
Since 1986，the incoming water and sediment at Tongguan section have decreased greatly with less discharge and flood peak，short duration and high sediment concentration。The average water volume with 12 billion m3 in 1986～1999's flood periods are 40%～60% less than that in previous periods。The average daily discharge of days with 3000m3/s larger and water volume reduced 90% above with smaller change of sediment amounts，the sediment concentration increased doubly 。The average lower margin in flood season of Tongguan elevation reduced obviously，it is 0.10m smaller than the raising value in non-flood season and 0.08m smaller than average lowering value at flood season before reservoir construction.It is 0.30m smaller comparing with initial period of operation。In order to suit the unfavorable conditions of reservoir's water-sediment ，the modes of reservoir operation are regulated and improved for several times，but the bed's deposition is more serious than that in 1985。Tongguan elevation was raised year by year。Since 1994 especially，the reservoir water-sediment reduced obviously based on the reduction by a big margin in previous period 。Tongguan elevation maintained at a high level with long-term variation between 328.00 and 328.35m.