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Changes in stage-flow relation of the East River, the Pearl River basin: causes and implications

机译：珠江流域东江水位关系的变化：成因与启示

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摘要

Water level and streamflow extracted from 891 hydrological episodes from both dry and flood seasons covering a period of 1954-2009 were analyzed to investigate stage-flow relations. Results indicate the following. (1) Since the early 1990s the low/high flow is increasing/decreasing. The water level, particularly the high level, is consistently decreasing. An abrupt decrease of water level is observed since the early 1990s at the lower East River. (2) Stage-streamflow relation is usually stable in the river reach with no significant bedform morphological changes. Changes in the geometric shape of the river channel are the major cause of the change in the stage-streamflow relation. (3) An abrupt decrease of water level at the Boluo station is mainly the result of abnormally rapid downcutting of the riverbed due to extensive sand dredging within the channel which caused serious headwater erosion. This human-induced modification by downcutting of the river channel may lead to significant hydrological alterations and may have critical implications for flood control, conservation of eco-environment, and also for basin-wide water resources management in the lower East River basin.
机译：分析了从1954-2009年期间的旱季和汛期的891个水文事件中提取的水位和流量，以研究水位-流量关系。结果表明如下。 （1）自1990年代初以来，低/高流量一直在增加/减少。水位，特别是高水位一直在下降。自1990年代初以来，在东河下游观测到水位突然下降。 （2）河段的水流关系通常稳定，河床形态无明显变化。河道几何形状的变化是造成阶段-流量关系变化的主要原因。 （3）博罗站水位突然下降，主要是由于河道内大量的沙粒淤积导致河床严重水蚀，导致河床非正常快速下水。人为改变河流河道的方式可能导致重大的水文变化，并且可能对防洪，生态环境的保护以及东流域下游的全流域水资源管理产生重大影响。

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  • 来源
    《Nordic hydrology》 |2013年第4期|737-746|共10页
  • 作者

    Qiang Zhang; Kun Li; Vijay P. Singh; Xiaohong Chen; Jianfeng Li;

  • 作者单位

    Department of Water Resources and Environment Sun Yat-sen university, Guangzhou 510275, China,Key Laboratory of Water Cycle and Water Security in Southern China of Guangdong High Education Institute, Sun Yat-sen University, Guangzhou 510275, China,School of Geography and Planning, and Guangdong Key Laboratory for Urbanization and Geo-simulatlon, Sun Yat-sen University, Guangzhou, China;

    Department of Water Resources and Environment Sun Yat-sen university, Guangzhou 510275, China,Key Laboratory of Water Cycle and Water Security in Southern China of Guangdong High Education Institute, Sun Yat-sen University, Guangzhou 510275, China,School of Geography and Planning, and Guangdong Key Laboratory for Urbanization and Geo-simulatlon, Sun Yat-sen University, Guangzhou, China;

    Department of Biological & Agricultural Engineering and Department of Civil and Environmental Engineering, Texas A & M university, College station, Texas 77843-2117, USA;

    Department of Water Resources and Environment Sun Yat-sen university, Guangzhou 510275, China,Key Laboratory of Water Cycle and Water Security in Southern China of Guangdong High Education Institute, Sun Yat-sen University, Guangzhou 510275, China,School of Geography and Planning, and Guangdong Key Laboratory for Urbanization and Geo-simulatlon, Sun Yat-sen University, Guangzhou, China;

    Department of Water Resources and Environment Sun Yat-sen university, Guangzhou 510275, China,Key Laboratory of Water Cycle and Water Security in Southern China of Guangdong High Education Institute, Sun Yat-sen University, Guangzhou 510275, China,School of Geography and Planning, and Guangdong Key Laboratory for Urbanization and Geo-simulatlon, Sun Yat-sen University, Guangzhou, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    bedform morphology; fluvial processes; hydrological alteration; stage-streamflow relation; East River;

    机译：床形河床过程;水文改变;级流关系东河;

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