| 摘要: |
| 将无锡运东大包围调水试验过程划分为背景期、调度期和恢复期3个阶段，通过长系列河网水动力-水质多要素同步原型观测，获得河网干支流水动力特性，掌握不同控制断面水质指标的变化规律，并分析水动力过程对不同水质指标改善的敏感性。在此基础上，基于引水流量、汊道分流比、河网流速、水位以及水质改善幅度控制阈值，论证白屈港-严埭港-转水河-环城河-古运河沿线主引水通道的可行性与存在的问题，构建区域精细化河网水动力模型，在模型率定验证基础上模拟了高水位单通道自引泵排、低水位单通道泵引泵排、双通道自引泵排运行方案，比选了不同生态补水方案的水动力与水质效果，为无锡运东大包围畅流活水方案制定提供了研究方法与数据支持。 |
| 关键词: 原型观测 河网模型 生态补水 畅流活水 水动力 水质 敏感性分析 |
| DOI：10.12170/201905001 |
| 分类号:X824 |
| 基金项目:国家重点研发计划资助项目（2016YFC0401503）;江苏省水利科技重大技术攻关项目（2016005，2016009）;水体污染控制与治理重大专项（2017ZX07203-002) |
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| Sensitivity analysis and application research of water quality improvement effect based on synchronous prototype observation |
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LIU Guoqing, FAN Ziwu, WANG Bo, LIU Yang, WANG Wei
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State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China
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| Abstract: |
| The Wuxi Yundong surrounding water diversion test is divided into three phases: background period, dispatch period and recovery period. Through the long-series river network hydrodynamic-water quality multi-factor synchronous prototype observation, the hydrodynamic characteristics of main tributaries are obtained. The changes of water quality indicators at different control sections are mastered, and the sensitivity of different water quality indicators affected by the hydrodynamic process is analyzed. On this basis, in view of the diversion flow, ramp split ratio, river network flow rate, water level and water quality improvement range control threshold, the feasibility and existing problems of the main water diversion channel along Baiqu Port-Yanyu Port-Tuanshui River-Huancheng River-Grand Canal are demonstrated, and a regional refined river network hydrodynamic model is constructed. On the basis of model calibration and verification, several operation plans related to the cyanobacteria period are simulated, including the high-water level single-channel self-priming pumping, low-water level single-channel pumping and dual-channel self-priming pumping. The hydrodynamic and water quality effects of different ecological water replenishment schemes are selected to provide research methods and data support for the development of the Wuxi Yundong water scheme. |
| Key words: prototype observation river network model ecological hydration flowing water hydrodynamics water quality sensitivity analysis |
