江湖关系变化条件下洞庭湖区撇洪工程对策研究
发布时间：2019-03-15 06:55
【摘要】：撇洪工程为洞庭湖区特别是四水尾闾地区重要的排涝设施之一。由于受江湖关系的变化和人类活动的影响,长江三口以及洞庭湖区泥沙淤积严重,导致洞庭湖区同流量下洪水位抬高、高洪水位持续时间延长;致使洞庭湖区撇洪工程自流外排机会减少、运行效率降低,撇洪河堤险情频繁出现,严重影响到了撇洪工程的运行安全。西洞庭湖区的常德市冲柳高水撇洪工程在洞庭湖区撇洪工程中具有一定的代表性,以该撇洪工程为实例,通过对比不同年代(20世纪70年代和21世纪初)的江湖关系变化条件下的撇洪工程运行效果,对其撇洪效果产生差异的原因进行了分析研究。根据分析结果,提出了适宜的应对措施及方案,即在撇洪工程出口处配套建设排涝泵站,同时,对该改造方案的排涝效果进行了论证和评估。研究成果可对类似地区排涝工程的规划设计提供借鉴和指导。
[Abstract]:Flood skimming project is one of the most important waterlogging facilities in Dongting Lake area, especially in Sishui Lv area. Due to the change of the relationship between rivers and lakes and the influence of human activities, the sediment deposition in the three estuary of the Yangtze River and Dongting Lake area is serious, which leads to the elevation of flood water level and the prolongation of the duration of high flood level under the same discharge in Dongting Lake area. As a result, the self-discharge of flood-skimming project in Dongting Lake area is reduced, the operation efficiency is reduced, and the dangerous situation of flood-skimming river dike occurs frequently, which seriously affects the operation safety of flood-skimming project. The high water drainage project in Changde City of the West Dongting Lake area is representative of the flood removal project in the Dongting Lake area, taking the flood removal project as an example. By comparing the operation effects of river-lake dewatering projects in different years (70's and 21 ~ (th) century), this paper analyzes the reasons for the differences in the flood-removal effects of the flood-removing projects in the years of the 20th century and the beginning of the 21 ~ (th) century. According to the analysis results, the appropriate countermeasures and schemes are put forward, that is, the waterlogging pumping station is set up at the exit of flood skimming project. At the same time, the flood drainage effect of this reconstruction scheme is demonstrated and evaluated. The research results can provide reference and guidance for the planning and design of drainage projects in similar areas.
【作者单位】： 湖南省水利水电勘测设计研究总院;
【基金】：湖南省水利厅科技项目(湘水科计[2015]245-05;湘水科计[2013]243-9)
【分类号】：TV87
[Abstract]:Flood skimming project is one of the most important waterlogging facilities in Dongting Lake area, especially in Sishui Lv area. Due to the change of the relationship between rivers and lakes and the influence of human activities, the sediment deposition in the three estuary of the Yangtze River and Dongting Lake area is serious, which leads to the elevation of flood water level and the prolongation of the duration of high flood level under the same discharge in Dongting Lake area. As a result, the self-discharge of flood-skimming project in Dongting Lake area is reduced, the operation efficiency is reduced, and the dangerous situation of flood-skimming river dike occurs frequently, which seriously affects the operation safety of flood-skimming project. The high water drainage project in Changde City of the West Dongting Lake area is representative of the flood removal project in the Dongting Lake area, taking the flood removal project as an example. By comparing the operation effects of river-lake dewatering projects in different years (70's and 21 ~ (th) century), this paper analyzes the reasons for the differences in the flood-removal effects of the flood-removing projects in the years of the 20th century and the beginning of the 21 ~ (th) century. According to the analysis results, the appropriate countermeasures and schemes are put forward, that is, the waterlogging pumping station is set up at the exit of flood skimming project. At the same time, the flood drainage effect of this reconstruction scheme is demonstrated and evaluated. The research results can provide reference and guidance for the planning and design of drainage projects in similar areas.
【作者单位】： 湖南省水利水电勘测设计研究总院;
【基金】：湖南省水利厅科技项目(湘水科计[2015]245-05;湘水科计[2013]243-9)
【分类号】：TV87
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