摘要
冰盖下输水是高纬度地区明渠输水的一种重要方式,控制不当易出现冰塞和冰坝等冰凌灾害。文中结合明渠冰期输水的特点,提出明渠冰期运行应以闸前常水位方式为宜。明渠冰期运行过程中,为了保证冰盖的稳定,水流弗汝德数应控制在0.08~0.09之内。由于冰期输水过程中,冰盖糙率的变化,冰期运行控制中,采用合适的控制算法,保证节制闸闸前水位的稳定是提高冰期安全运行的关键。合理设计拦冰索,不仅能促进冰盖的形成,也能适当提高冰期的输水能力及应对极端冰害的能力。
Conveying water under ice sheet is an important way of open channel water conveyance in high latitude area, if it is controlled improperly, the disasters such as ice jam and ice dam will occur. Com- bining with the charateristics of open channel water conveyance in ice age, this paper puts forward that the constant level mode before sluice is suitable for open channel in ice age. In the process of open channel run- ning in ice age, the flow Froude number should be controlled within 0.08~0. 09 to guarantee the stability of ice sheet. Since the ice sheet roughness changes in the process of water conveyance, to adopt the proper control algorithm and to guarantee the stability of constant level before sluice is the key for improving the safety running in ice age. The reasonable ice boom does not only promote the formation of ice sheet, but also improves the water conveyance ability in ice age,as well as the response capacity on extreme ice damage.
作者
陈文学
穆祥鹏
崔巍
何胜男
CHEN Wen-xue;MU Xiang-peng;CUI Wei;HE Sheng-nan(State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research, 100038, Beijing, China;Department of Hydraulics,China Institute of Water Resources and Hydropower Research, 100038, Beijing, China)
出处
《河北水利电力学院学报》
2018年第1期6-12,共7页
Journal of Hebei University Of Water Resources And Electric Engineering
基金
国家重点研发计划(2017YFC0405003)
国家自然科学基金面上项目(51579251)
关键词
明渠
闸前常水位
冰期输水
拦冰索
控制算法
open channel
constant level before algorithm sluice
water conveyance in ice age
ice boom
control
