
基于MIKE11闸坝联合调控的北运河生态流量保障模拟
党晓戈, 王世岩, 刘畅, 朱长军, 姚瑞华
基于MIKE11闸坝联合调控的北运河生态流量保障模拟
Ecological Flow Guarantee Simulation Based on Mike11 in North Canal Gate Dams Joint Regulation
目前保障多水生态目标生态流量需求是北运河流域水资源管理所面临的主要问题之一。应用DHI MIKE11模型系统建模平台,构建以生态敏感目标流量需求为调度基础的河网水文水动力模型,采用2015年及2011年水文数据,研究了不同情景方案下的流域多目标生态需求保障效果,结果显示,水文站模拟值与水文实测值基本一致,闸坝调控+减河减水+农业节水组合方案效果良好。模型旨在为河道多目标生态流量保障方案研究提供基础,并为水管理部门决策者基于多目标流量调度提供技术支持。
At present, ensuring the ecological flow demand of the multi-water ecological target is one of the main problems faced by the water resources management of the North Canal Basin. The DHI-MIKE11 model system modeling platform is used to construct the hydrological and hydrodynamic model of river network based on the flow demand of ecologically sensitive targets. The long-term series of measured hydrological data from the 2015 and 2011 hydrological yearbooks are used to study the multi-water ecological demand protection effect of the river basin of the different scenarios. The results show that the simulated value of the hydrological station is basically the same as the measured value of the hydrology, and the combination plan of gate dams regulation + river water reduction + agricultural water-saving has a good effect. This model aims to provide the basis for the research on the river channel multi-objective ecological flow guarantee scheme, and to provide technical support for the decision-makers of the water management departments based on the multi-water flow dispatch.
MIKE11 / 北运河 / 生态流量 / 闸坝调控 {{custom_keyword}} /
Mike11 / North Canal / ecological flow / regulation of sluices and dams {{custom_keyword}} /
图3 北运河流域干流研究区域河网水系概化图Fig.3 A schematic diagram of the river network in the study area of the main stream of the North Canal Basin |
表1 北运河干流河道糙率参数设置Tab.1 Setting of channel roughness parameters of the main stream of the North Canal Basin |
河道断面 | 主槽糙率 | 滩地糙率 |
---|---|---|
沙河水库~鲁疃闸段 | 0.022 5 | 0.07 |
鲁疃闸~苇沟闸段 | 0.022 5 | 0.07 |
苇沟闸~北关闸段 | 0.022 5 | 0.07 |
北关闸~甘棠坝段 | 0.022 5 | 0.05 |
甘棠坝~屈家店段 | 0.022 5 | 0.05 |
图5 典型水文站流量率定验证结果对比图Fig.5 Comparison chart of discharge calibration verification results for typical hydrological stations |
表2 模型误差估算结果Tab.2 The model comes with a small program error estimation result display |
误差估算 | 通县站 | 土门楼站 | ||
---|---|---|---|---|
率定期 | 验证期 | 率定期 | 验证期 | |
相关系数r | 0.903 | 0.907 | 0.931 | 0.908 |
纳西效率系数 | 0.816 | 0.821 | 0.862 | 0.825 |
峰值误差 | 0.231 | 0.106 | 0.142 | 0.156 |
水量误差 | 0.119 | 0.226 | 0.167 | 0.325 |
图8 通县站鱼类生态流量变化过程线Fig.8 Process line of fish ecological flow change in Tongxian Station |
图9 多情景方案船闸水位调控变化过程线Fig.9 Process line of water level regulation and change of ship lock with Multiple scenarios |
图10 土门楼站鱼类生态流量变化过程线Fig.10 Process line of fish ecological flow change in Tumenlou Station |
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