基于HEC-RAS模型的汉江上游庹家洲河段古洪水流量重建研究  

Reconstruction of the palaeoflood discharges at Tuojiazhou section in upper reaches of river Hanjiang by HEC-RAS model

作　　者：刘科[1] 查小春[1] 黄春长[1] 庞奖励[1] 白开霞[1] 

机构地区：[1]陕西师范大学旅游与环境学院,西安710062

出　　处：《干旱区资源与环境》2014年第10期184-190,共7页Journal of Arid Land Resources and Environment

基　　金：国家自然基金重点项目:汉江上游(南水北调水源区)万年尺度古洪水水文学研究(41030637);汉江上游河谷风成黄土堆积及其成壤改造对全新世气候变化的响应规律(41271108);国家社会科学基金重点项目:历史时期汉江上游极端性气候水文事件及其社会影响研究(11AZS009);教育部博士点基金优先发展领域项目(20110202130002)资助

摘　　要：准确掌握全新世特大古洪水流量,对于河流防洪减灾、水利工程建设和水资源合理开发调度具有重要的意义。文中利用HEC-RAS模型计算了汉江上游1983年、2005年和2010年的洪痕流量,与已有的研究成果相比,误差在5%以内。在此基础之上,利用相同的河流横断面和水文参数,选择合适的曼宁系数和河道比降,重建了汉江上游庹家洲河段的4期古洪水的洪峰流量,计算的古洪水洪峰流量符合Baker提出的流域面积和流域内特大洪水洪峰流量的关系。说明利用HEC-RAS模型来重建古洪水流量,准确、便捷、可行。其研究结果为重建古洪水流量提供了新的研究方法。It is of great significance to obtain accurate Holocene extraordinary palaeoflood hydrological discharge data for flood control,hydrological engineering and hazard mitigation.A series of cross section data and Manning roughness coefficient must be selected appropriately,and gradient was measured accurately in the field.Then flood peak discharges of 1983,2005 and 2010 extraordinary floods in the upper reach of Hanjiang river were reconstructed by HEC-RAS.The error between the reconstructed results and gauged discharges is within 5%.Then four palaeofloods peak discharges were reconstructed by using appropriate hydraulic parameters in HEC-RAS.The peak discharges of four palaeofloods coincided with relationship between peak flood discharge and the global maximum known events in drainage area,which was mentioned by Victor R.Baker.The results showed that the reconstructed palaeoflood peak discharges by HEC-RAS are reliable,convenient and acceptable,it is a new method suggested to reconstruct flood peak discharges in the research of palaeoflood.

关 键 词：HEC-RAS模型 古洪水 流量重建 汉江上游 

分 类 号：P90[天文地球—自然地理学]