Please wait a minute...
浙江大学学报(工学版)
浙江大学学报(工学版)
水利工程、土木工程     
三峡工程运用后荆江河段平滩河槽形态调整特点
夏军强1, 宗全利1, 邓珊珊1, 许全喜2, 张翼1
1. 武汉大学 水资源与水电工程科学国家重点实验室,湖北 武汉 430072；2. 长江水利委员会水文局,湖北 武汉 430010
Adjustments in reach-scale bankfull channel geometry of Jingjiang reach after operation of Three Gorges Project
XIA Jun-qiang1, ZONG Quan-li1, DENG Shan-shan1, XU Quan-xi2, ZHANG Yi1
1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China; 2. Bureau of Hydrology, Changjiang Water Resources Commission, Wuhan 430010, China
 全文: PDF(1423 KB)   HTML
摘要：

为确定三峡水库蓄水后荆江河段平滩河槽形态调整特点,提出基于河段尺度的平滩河槽形态参数的计算方法,计算上、下荆江段2002—2013年汛后河段平均的平滩河槽形态参数.结果表明：三峡工程运用后,坝下游河床冲刷加剧,个别河段河势变化剧烈,但总体河势仍基本稳定；尽管局部河段的崩岸现象较为突出,但河段平滩宽度总体变化不大,上、下荆江平均河宽分别为1 388及1 305 m,而河段平滩水深平均增加1.6及1.0 m,故荆江河段的平滩面积在持续增加.最后建立河段尺度的平滩河槽形态参数与前期5 a平均的汛期水流冲刷强度之间的计算关系,用于预测该河段平滩河槽形态随水沙条件的变化趋势.
Abstract:

In order to determine the recent adjustments in the reach-scale bankfull channel geometry of the Jingjiang Reach after the operation of the Three Gorges Project (TGP), an integrated approach to calculating reach-scale bankfull channel dimensions was then proposed, based on the measured section-scale bankfull geometry in the reach. The bankfull channel dimensions of the Upper and Lower Jingjiang Reaches (UJR and LJR) were calculated using the proposed method and the surveyed post-flood profiles during the period from 2002 to 2013. Calculated results indicate that: the channel evolution in the UJR and LJR occurred mainly in the component of bankfull depth after the TGP operation, although there were significant bank erosion processes in local regions; the bankfull widths in the UJR and LJR slightly changed, with the mean values of 1388 and 1305 m, respectively; the reach-scale bankfull depth increased respectively by 1.6 m in the UJR and 1.0 m in the LJR, which caused to the reach-scale bankfull area to increase gradually. Finally, empirical relationships for the UJR and LJR were developed between the reach-scale bankfull channel dimensions and the previous five-year average fluvial erosion intensity during flood seasons, which can be used to predict the response of the reach-scale bankfull geometry to the altered flow and sediment regime entering the Jingjiang Reach.
出版日期: 2015-02-01
:  TV 147  
基金资助:

国家“973”重点基础研究发展规划资助项目(2012CB417001)；国家自然科学基金资助项目(51079103,51339001)
作者简介: 夏军强(1974—),男,教授,主要从事河流动力学方面的研究.E-mail: xiajq@whu.edu.cn
服务　　
把本文推荐给朋友
加入引用管理器
E-mail Alert
RSS
作者相关文章　　

引用本文:

夏军强, 宗全利, 邓珊珊, 许全喜, 张翼. 三峡工程运用后荆江河段平滩河槽形态调整特点[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2015.02.007.

XIA Jun-qiang, ZONG Quan-li, DENG Shan-shan, XU Quan-xi, ZHANG Yi. Adjustments in reach-scale bankfull channel geometry of Jingjiang reach after operation of Three Gorges Project. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2015.02.007.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2015.02.007    或    http://www.zjujournals.com/eng/CN/Y2015/V49/I2/238

［1］ LEOPOLD L B, MADDOCK T. The Hydraulic Geometry of stream channels and some physiographic implications ［R］. Professional Paper No. 252, Washington DC: Geological Survey, 1953, 57.
［2］ PARK C C. World-wide variations in hydraulic geometry exponents of stream channels: an analysis and some observations ［J］. Journal of Hydrology, 1977, 33(1/2): 133-146.
［3］ HE L, WILKERSON G V. Improved bankfull channel geometry prediction using two-year return-period discharge ［J］. Journal of the American Water Resources Association, 2011, 47(6): 1298-1316.
［4］ LEE JS, JULIEN PY. Downstream hydraulic geometry of alluvial channels ［J］. ASCE Journal of Hydraulic Engineering, 2006, 132(12): 1347-1352.
［5］ WILLIAMS G P, WOLMAN M G. Downstream effects of dams on alluvial rivers ［R］. Professional Paper 1286, Washington DC: Geological Survey, 1984, 83.
［6］ PETTS G E, GURNELL A M. Dams and geomorphology: research progress and future directions ［J］. Geomorphology, 2005, 71(1/2): 27-47.
［7］ GREGORY K J. The human role in changing river channels ［J］. Geomorphology, 2006, 79(3/4): 172-191.
［8］ WU B S, XIA J Q, FU X D, et al,. Effect of altered flow regime on bankfull area of the Lower Yellow River, China ［J］. Earth Surface Processes and Landforms, 2008, 33(10): 1585-1601.
［9］ SHIN Y H, JULIEN P Y. Changes in hydraulic geometry of the hwang river below the hapcheon re-regulation dam, south korea ［J］. International Journal of River Basin Management, 2010, 8(2), 139-150.
［10］ XU X B, TAN Y, YANG G S. Environmental impact assessments of the Three Gorges Project in China: Issues and interventions ［J］. Earth-Science Reviews, 2013, 124: 115-125.
［11］ PINTER N, HEINE R A. Hydrodynamic and morphodynamic response to river engineering documented by fixed-discharge analysis, Lower Missouri River, USA ［J］. Journal of Hydrology, 2005, 302(1/4): 70-91.
［12］ WU B S, WANG G Q, MA J M, et al. Case study: river training and its effects on fluvial processes in the lower Yellow River, China ［J］. ASCE Journal of Hydraulic Engineering,2005, 131(2): 85-96.
［13］ WOHL E, WILCOX A. Channel geometry of mountain streams in New Zealand ［J］. Journal of Hydrology,2005, 300(1/4): 252-266.
［14］ HARMAN C, STEWARDSON M, DEROSE R. Variability and uncertainty in reach bankfull hydraulic geometry ［J］. Journal of Hydrology,2008, 351(1/2): 13-25.
［15］ XIA J Q, LI X J, LI T, et al. Response of reach-scale bankfull channel geometry in the Lower Yellow River to the altered flow and sediment regime ［J］. Geomorphology, 2014, 213: 255-265.
［16］ 余文畴,卢金友. 长江河道崩岸与护岸［M］.北京:中国水利水电出版社, 2008.
［17］ 长江水利委员会水文局.2013年度三峡水库进出库水沙特性、水库淤积及坝下游河道冲刷分析［R］.武汉：长委水文局科研报告, 2014.
Hydrology Bureau of the Changjiang Water Resources Commission. Analysis on the flow and sediment regimes entering and released from the reservoir, reservoir sedimentation and channel degradation downstream of the Three Gorges Dam in 2013\[R\]. Wuhan： Scientific Report of Changjiang Water Resources Commission, 2014.
［18］ XIA J Q, ZONG Q L, ZHANG Y, et al. Prediction of recent bank retreat processes at typical sections in the Jingjiang Reach after the TGP operation ［J］. Science China: Technological Sciences, 2014, 57(8): 1490-1499.
No related articles found!