CAJ | 학술논문

南水北调中线输水线路自南向北由温暖带进入半寒冷地区，受气温变化影响，将有不同程度的冰情出现，对渠道运行安全和输水效率造成不利影响。以描述一维明渠非恒定流的圣维南方程为基础，对输水线路的冰封段和冰盖段水流阻力进行了分析，进而得到针对冰期水力条件的修正圣维南方程，为冰期渠道水力学数值模拟提供了理论基础。
남수북조중선수수선로자남향북유온난대진입반한랭지구，수기온변화영향，장유불동정도적빙정출현，대거도운행안전화수수효솔조성불리영향。이묘술일유명거비항정류적골유남방정위기출，대수수선로적빙봉단화빙개단수류조력진행료분석，진이득도침대빙기수력조건적수정골유남방정，위빙기거도수역학수치모의제공료이론기출。
The water conveyance line of South-to-North Water Diversion, from south to north, goes from the warm zone into the semi cold area. Under the influence of temperature changes, ice may occur along the line at different degrees, which will af-fect the operational safety and efficiency of water diversion channel. Based on the Saint-Venant equation that is used to describe the unsteady flow in an open channel, the water resistances of frozen and ice sheet sections are analyzed. Furthermore, the modi-fied Saint-Venant equation for the water condition in ice period is obtained, which can provide a theoretical basis for the channel hydraulics simulation in ice period.