
面向水环境治理的晋安河流域“水多水动”调度方案研究
孟庆魁, 胡耀华, 廖卫红, 雷晓辉, 王超
面向水环境治理的晋安河流域“水多水动”调度方案研究
Research on the Multi-Hydraulic Dispatching Scheme of Jinan River Basin Based on Water Environment Treatment
福州市因地理环境特点导致城区内河道水位过低,流动性差,由此造成了水质污染问题。为了维持福州市河道水位达到景观水位且有效的缓解水质污染问题,针对福州市中心城区晋安河-光明港流域河网,通过InfoWorks ICM水动力模型,建立一维非恒定流Saint-Venant方程组。同时结合福州实际调度情况设计了9种调度方案,通过设立能否达到调控目标、泵站开启时间、闸门开启次数和重点断面未达到景观水位平均时长作为目标函数,对比9种调度方案的结果,进行泵闸配置调整,给出了推荐调度方案。同时,建立水质模型,进行水环境调度模拟,以生化需氧量等级从Ⅳ类变为Ⅲ类的时长此作为目标函数进行调度方案的评价,最终给出了最优的调度方案,为实现城区“水多水动”调度方案的研究提供重要依据。
Due to the geographical environment problems in Fuzhou City, the water level of the rivers in the urban area is much low and the fluidity is very poor, which generated the water pollution problem. In order to maintain the water level of Fuzhou's river course to reach the landscape level and effectively alleviate the water pollution problem,for the river network of the Jinan River-Guangminggang River Basin in the downtown area of Fuzhou,a one-dimensional unsteady flow Saint-Venant equation set is established through the InfoWorks ICM hydrodynamic model. At the same time, nine scheduling schemes are designed based on the actual dispatching situation in Fuzhou. The objective function is to establish whether the control target can be achieved,the opening time of the pump station,the number of gate openings, and the average length of the key section not reaching the landscape water level as the objective function. Comparing the results of 9 scheduling schemes,adjusting the pump and gate configuration, and giving a recommended scheduling scheme. At the same time,a water quality model is established,and water environment dispatching simulations are carried out. The time for the BOD level to change from type Ⅳ to type Ⅲ is used as the objective function to evaluate the dispatching plan,and finally the optimal dispatching plan is given for the realization of the urban area. The study of the "water more water dynamic" dispatching scheme provides an important basis.
InfoWorks ICM / 水动力模型 / 水质模型 / 调度方案评价 {{custom_keyword}} /
InfoWorks ICM / hydrodynamic model / water quality model / scheduling plan evaluation {{custom_keyword}} /
表1 沿江闸站参数表Tab.1 Gate parameter table |
水闸名称 | 总排水量/(m3·s-1) | 闸孔数 | 单孔排水量/(m3·s-1) |
---|---|---|---|
魁岐水闸 | 503 | 5 | 100 |
江四水闸 | 81 | 2 | 40 |
红星水闸 | 80 | 3 | 27 |
表2 排水泵站参数表Tab.2 Drainage pump station parameter table |
泵站名称 | 设计最大流量/(m3·s-1) | 水泵数量 | 水泵平均设计流量/(m3·s-1) |
---|---|---|---|
魁岐排涝站 | 120 | 3 | 40.0 |
魁岐排涝二站 | 80 | 3 | 26.7 |
东风排涝站 | 80 | 24 | 3.3 |
红星泵站 | 80 | 9 | 8.9 |
图5 典型潮位过程线下晋安河水位过程率定结果Fig.5 The calibration results of the Jin'an River water level process under the typical tide level process line |
表3 模型率定结果Tab.3 Model calibration results |
时间 | 实测水位/m | 模拟水位/m | 误差/m |
---|---|---|---|
0∶00∶00 | 4.25 | 4.15 | -0.10 |
1∶00∶00 | 4.30 | 4.18 | -0.12 |
2∶00∶00 | 4.38 | 4.28 | -0.10 |
3∶00∶00 | 4.50 | 4.40 | -0.10 |
4∶00∶00 | 4.46 | 4.56 | 0.10 |
5∶00∶00 | 4.40 | 4.50 | 0.10 |
6∶00∶00 | 4.41 | 4.51 | 0.10 |
7∶00∶00 | 4.38 | 4.48 | 0.10 |
8∶00∶00 | 4.40 | 4.45 | 0.05 |
9∶00∶00 | 4.38 | 4.40 | 0.02 |
10∶00∶00 | 4.39 | 4.35 | -0.04 |
11∶00∶00 | 4.45 | 4.50 | 0.05 |
12∶00∶00 | 4.50 | 4.50 | 0 |
13∶00∶00 | 4.48 | 4.45 | -0.03 |
14∶00∶00 | 4.45 | 4.41 | -0.04 |
15∶00∶00 | 4.41 | 4.38 | -0.03 |
16∶00∶00 | 4.38 | 4.30 | -0.08 |
17∶00∶00 | 4.30 | 4.25 | -0.05 |
18∶00∶00 | 4.25 | 4.30 | 0.05 |
19∶00∶00 | 4.30 | 4.35 | 0.05 |
20∶00∶00 | 4.35 | 4.37 | 0.02 |
21∶00∶00 | 4.37 | 4.40 | 0.03 |
22∶00∶00 | 4.40 | 4.42 | 0.02 |
23∶00∶00 | 4.42 | 4.40 | -0.02 |
图7 依靠文山里泵站引水河道水位上涨过程图Fig.7 Process diagram of water level rise in water diversion channel relying on Wenshanli Pumping Station |
表4 晋安河-光明港流域维持4.2 m情景下不同调度方案Tab.4 Different dispatching schemes under the scenario of maintaining 4.2 m in Jinan River-Guangming Port basin |
方案序号 | 上游流量/(m3·s-1) | 下游调控方式 |
---|---|---|
方案一 | 25.0 | 调控方式一 |
方案二 | 25.0 | 调控方式二 |
方案三 | 25.0 | 调控方式三 |
方案四 | 17.5 | 调控方式一 |
方案五 | 17.5 | 调控方式二 |
方案六 | 17.5 | 调控方式三 |
方案七 | 10.0 | 调控方式一 |
方案八 | 10.0 | 调控方式二 |
方案九 | 10.0 | 调控方式三 |
表5 晋安河-光明港流域维持4.2 m情景下不同调度方案结果对比Tab.5 Comparison of the results of different dispatching schemes under the scenario of maintaining 4.2 m in Jinan River-Guangming Port basin |
目标函数 | 能否达到调控目标 | 泵站开启时间/min | 闸门开启次数/次 | 重点断面未达到景观水位平均时长/min |
---|---|---|---|---|
方案一 | 能 | 魁岐排涝二站开启540 | 48 | 520 |
方案二 | 能 | 魁岐排涝二站开启540 | 50 | 544 |
方案三 | 能 | 魁岐排涝二站开启180 | 48 | 544 |
方案四 | 能 | 魁岐排涝二站开启420 | 48 | 546 |
方案五 | 能 | 魁岐排涝二站开启60 | 48 | 548 |
方案六 | 不能 | |||
方案七 | 能 | 魁岐排涝二站开启150 | 48 | 559 |
方案八 | 不能 | |||
方案九 | 不能 |
图11 3种方案晋安河与光明港交汇处BOD浓度变化曲线图(2018年)Fig.11 Three schemes of BOD concentration change curve at the intersection of Jin'an River and Guangming Port |
表6 晋安河-光明港流域维持4.2 m情景下不同调度方案结果对比Tab.6 Comparison of the results of different dispatching schemes under the scenario of maintaining 4.2 m in Jinan River-Guangming Port basin |
目标函数 | 上游流量/(m3·s-1) | 从Ⅳ类水变为Ⅲ类水的时间/min |
---|---|---|
方案三 | 25.0 | 1 584 |
方案五 | 17.5 | 2 184 |
方案七 | 10.0 | 2 328 |
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