松花江流域蓄滞洪区分蓄洪能力研究

Study on Control and Application Scheme of Flood Storage and Detention Areas in Songhua River Basin

胖头泡、月亮泡蓄滞洪区为松花江流域防洪体系的重要组成部分,目前已基本建成,具备启用条件。针对胖头泡蓄滞洪区分洪工程相对规划阶段哈尔滨站设计洪水的一些问题,后期做了一些调整,对哈尔滨站设计洪水重新分区,推求设计洪水过程线,并利用蓄滞洪区洪水调度模型和洪水演进模型,对哈尔滨市200年一遇(标准内洪水)和300年一遇洪水(超标准洪水)进行蓄滞洪区分蓄洪计算,分析蓄滞洪区分蓄洪能力。结果表明,新建成的两个蓄滞洪区分蓄洪能力达到规划标准,能将哈尔滨市防洪标准由100年一遇提高至200年一遇;当哈尔滨市发生300年一遇洪水时,蓄滞洪区仍能发挥重要削峰作用,仅当哈尔滨洪水以嫩江洪水为主时,运用蓄滞洪区能将哈尔滨市防洪标准提高至300年一遇。

The Pangtoupao and Yueliangpao flood storage and detention areas are important components of the flood control system of Songhua River Basin,which have been basically completed and have the conditions for use.Considering that the flood diversion project in Pangtoupao flood storage and detention area has changed compared with the planning,and there are some unreasonable problems in the design flood of Harbin station in the planning stage,floods from upstream of Harbin are repartitioned.Based on the control of Harbin Station,the design flood process line was deduced.The flood regulation model and flood routing model of the flood storage and detention areas were constructed.Under the condition of the 200-return-year and 300-return-year floods in Harbin,the flood diversion and storage capacity of the flood storage and detention areas were analyzed.The results show that the flood storage capacity of the two newly built flood storage and detention areas meet the planning standard,and the flood control standard of Harbin can be improved from 100 year recurrence period to 200 year recurrence period;When the 300-return-year flood occurs in Harbin,the flood storage and detention areas can still play an important role in peak cutting.Only when the flood in Harbin is dominated in Nen River,the flood control standard of Harbin can be raised to 300-return-year flood the flood storage and detention area by regulation of two flood storage and detention areas.