不同水位流量关系推求方法在QZK 水电站的应用  

Application of Estimation Method of Different Stage-discharge Relationship in QZK Hydropower Station

作　　者：刘阳容 胡贤群 刘刚 LIU Yang-rong;HU Xian-qun;LIU Gang(Power China Kunming Engineering Corporation Limited,Kunming 650051,China)

机构地区：[1]中国电建集团昆明勘测设计研究院有限公司,云南昆明650051

出　　处：《云南水力发电》2022年第2期94-97,共4页Yunnan Water Power

摘　　要：水电站坝、厂址水位流量关系不仅关系着工程的安全,同时也是确定工程装机容量、计算电站发电效益的基础,对低水头大流量电站尤为重要。根据QZK水电站坝址断面处资料条件,分别采用本断面高水外延法、相关关系法、曼宁公式法、HEC-RAS水文模型法多种方法推求坝址水位流量关系。结果表明:由于资料条件较好,各种方法推求的QZK水电站坝址水位流量关系成果较为接近。同时通过对比发现,在无实测水尺观测资料、仅有本断面纵横剖面的情况下,只要比降、糙率两参数选取合适,采用传统曼宁公式推求的水位流量关系成果亦具有较高的精度。The relationship between water level and flow at dam and plant site is not only related to the safety of the project,but also the basis for determining the installed capacity of the project and calculating the power generation benefit of the plant.It is particularly important for low head and large flow power plants.According to the data conditions at the dam site section of QZK Hydropower Station,the water level-discharge relation at the dam site is calculated by several methods,such as high water epitaxy method,correlation method,Manning formula method and HEC-RAS hydrological model method.The results show that the results of water leveldischarge relation at dam site of QZK Hydropower Station calculated by various methods are close due to better data conditions.At the same time,through comparison,it is found that the stage-discharge relationship results obtained by using traditional Manning formula also have high accuracy as long as the two parameters of ratio drop and roughness are properly selected without the observed data of water gauge and only the cross-section of this section.

关 键 词：水电站 水位流量关系 曼宁公式 水文模型 

分 类 号：P333[天文地球—水文科学]