地面沉降对蓄滞洪区调度及风险的影响研究

发布时间：2018-04-26 15:19

  本文选题：地面沉降 + 蓄滞洪区　； 参考：《天津大学学报(自然科学与工程技术版)》2017年10期

【摘要】：综合分析大黄堡蓄滞洪区不同年份的遥感数据和水准点数据,可知该区域年均沉降量由1989—2002年的20,mm降至2002—2010年的12,mm,虽呈整体下降趋势,但总沉降量仍然较大.为提高分析的全面性,综合考虑了入流河道堤防沉降对蓄滞洪区的影响,数据分析表明堤防每沉降100,mm,河道泄流能力下降30,m~3/s,从而导致蓄滞洪区入流量增加.针对大黄堡蓄滞洪区采用交替方向隐式(ADI)法建立二维洪水演进模型,模拟结果表明:地面沉降对蓄滞洪区库容有影响,在设计水位情况下蓄量比沉降前增加了14%,;地面沉降后100年一遇洪水时,原调度方案不能满足滞洪要求,需改变原只启动前3区的调度原则,增加启动Ⅳ区滞洪,使得淹没面积较沉降前增加了14.5%,,洪灾损失较沉降前增加了22.1%,,增加了洪灾风险.
[Abstract]:Based on the comprehensive analysis of remote sensing data and leveling point data in different years in Dahuangbao flood storage and detention area, it can be seen that the average annual subsidence in this area decreased from 20 mm in 1989 to 12 mm in 2002-2010. In order to improve the comprehensiveness of the analysis, the influence of embankment settlement on flood storage and detention area is considered synthetically. The data analysis shows that for every 100 mm settlement of embankment, the discharge capacity of the channel decreases by 30 m ~ 3 / s, which leads to the increase of inflow and discharge of flood storage and detention area. The alternating direction implicit ADI method is used to establish a two-dimensional flood routing model for Dahuangbao flood storage and detention area. The simulation results show that the land subsidence has an effect on the reservoir capacity of the flood storage and detention area. Under the condition of design water level, the storage capacity is increased by 14 times than that before settlement, and when the flood occurs once in 100 years after land subsidence, the original dispatching scheme can not meet the requirements of flood detention, so it is necessary to change the dispatching principle of the first three areas only to start the former three areas and increase the flood detention in area 鈪，

本文编号：1806569