黄河宁蒙段河道过流能力  

Conveyance Capacity of Ningxia-Inner Mongolia Reach of the Yellow River

作　　者：白涛[1] 哈燕萍 马盼盼 麻蓉[1] 畅建霞[1] Bai Tao;Ha Yanping;Ma Panpan;Ma Rong;Chang Jianxia(State Key Laboratory of Eco-Hydraulies in Northwest Arid Region,Xi~an University of Technology,Shannxi XiJan 710048)

机构地区：[1]西安理工大学省部共建西北旱区生态水利国家重点实验室,陕西西安710048

出　　处：《中国沙漠》2018年第5期1093-1098,共6页Journal of Desert Research

基　　金：国家重点研发计划项目(2017YFC0405900);陕西省水利科技计划项目(2017slkj-16;2017slkj-27);中国博士后科学基金项目(2017M623332XB);陕西省博士后科研资助项目;陕西省自然科学基础研究计划项目(2018JQ5145)

摘　　要：宁蒙段河道过流能力过低是威胁黄河上游洪凌安全的关键因素,也是宁蒙河段水沙调控的重要影响因素。通过水位-流量关系曲线法确定了过流能力,对现状过流能力与历史过流能力进行对比分析,探讨了造成宁蒙河段河道过流能力过低的原因。结果显示:宁蒙河段自建站以来有剧烈的河床抬高和过流能力下降现象;宁蒙河段各断面的现状过流能力由5 200～6 200 m^3·s^(-1)降至1 500～2 200 m^3·s^(-1),部分断面超过1 500 m^3·s^(-1)就会导致漫滩,过流能力大大降低。提出建设标准化堤防,提高宁蒙河段河道的过流能力;以标准化堤防为前提获得了宁蒙河段各断面的最大过流能力。Low conveyance capacity of Ningxia-Inner Mongolia Reach is key factors which threatened the security of Flooding and Ice Run upper Yellow River, it also a bottleneck developing regulation and con- trol of runoff and sediment of the Ningxia-Inner Mongolia Reach. Conveyance capacity of overcurrent is determined by the relationship curve between water level and flow in this paper, and the current convey- ance capacity and historical conveyance capacity are analyzed comparatively, the causes of the overcur- rent capacity of the Ningxia-Inner Mongolia Reach are discussed. The results show that： the reach has a dramatic phenomenon of riverbed elevation and over-current capacity decline since establishment of sta- tions; the present conveyance capacity of the reach decreased from 5 200-5 200 m3·s^-1 to 1 500-2 200 m3 · s^-1, some sections More than 1 500 m3 · s^-1 will lead to the floodplain, and reduce the conveyance capacity greatly; proposed the construction of standardization dike to improve the conveyance capacity; under the premise of the Yellow River dike standardization, access to the secure flow of traffic through, establishing foundation on developing rtmoff and sediment regulation and control of the Ningxia-Inner Mongolia Reach safely and successfully. Research has important practical significance to improve the Ningxia-Inner Mongolia Reach overcurrent condition and accelerate the Standardized construction process of the Yellow River each section of Ningxia-Inner Mongolia Reach dike.

关 键 词：水位-流量关系 过流能力 水沙调控 冲淤变化 

分 类 号：P343.1[天文地球—水文科学]