CAJ | 학술논문

通过对汉江上游流域的广泛考察,在旬阳县高店铺-构元乡河段发现典型的全新世古洪水滞流沉积剖面.在此基础上,采集样品进行粒度成分和磁化率等分析测试.结果表明这些沉积层是古洪水在高水位滞流环境中的沉积物.根据地层学对比分析,确定由其记录的古洪水事件分别发生于全新世早期大约9 500—8 500aB.P.和全新世晚期3 200—2 800aB.P..根据沉积学和水文学原理恢复其洪峰水位,采用比降法模型,计算出古洪水洪峰流量介于43 290～49 130m3/s之间.利用2010年大洪水洪痕恢复计算洪峰流量,对古洪水洪峰流量计算结果进行了验证,结合历史洪水和观测洪水数据,获得了万年尺度洪水洪峰流量与频率关系.
통과대한강상유류역적엄범고찰,재순양현고점포-구원향하단발현전형적전신세고홍수체류침적부면.재차기출상,채집양품진행립도성분화자화솔등분석측시.결과표명저사침적층시고홍수재고수위체류배경중적침적물.근거지층학대비분석,학정유기기록적고홍수사건분별발생우전신세조기대약9 500—8 500aB.P.화전신세만기3 200—2 800aB.P..근거침적학화수문학원리회복기홍봉수위,채용비강법모형,계산출고홍수홍봉류량개우43 290～49 130m3/s지간.이용2010년대홍수홍흔회복계산홍봉류량,대고홍수홍봉류량계산결과진행료험증,결합역사홍수화관측홍수수거,획득료만년척도홍수홍봉류량여빈솔관계.
Through field investigation in the upper reaches of the Hanjiang River,palaeoflood slackwater deposit was found in the Gaodianpu-Gouyuanxiang reach of Xunyang county.The results of field observation and measurement of grain-size and magnetic susceptibility indicate that these slackwater deposit are very typical and that they have been deposited by suspended sediment load in the floodwater.By pedo-stratigraphical correlation,the palaeoflood events were dated to between 9 500—8 500 a B.P.and 3 200—2 800 a B.P.,respectively.The flood peak discharges were reconstructed to 43 290～49 130 m3/s.They were checked by the reconstruction of the 2010 extraordinary flood based on the stage indicator and the same hydrological parameters.The 10 000-year time-scale relations between flood peak discharge and occurrence frequency are therefore established.It is very important for flood design in the hydraulic engineering and flood control,and for understanding the response of fluvial system to global climate change.