Guanghua Guan School of hydraulic and hydropower engineering

© Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 2

1 灌区量水的任务和要求 糙率变化 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 6

1 灌区量水的任务和要求 n=0. 014? © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 7

1 灌区量水的任务和要求 要求 ��性 �用性 适用性 精确性 �序性 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 8

2 灌区量水的常用方法 节制闸 渡槽 倒虹吸 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 11

2 灌区量水的常用方法 量水槽 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 量水堰 13

2 灌区量水的常用方法 流速仪 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University �子 非�子 15

2 灌区量水的常用方法 流速仪 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 16

2 灌区量水的常用方法 电磁流量计 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 18

2 灌区量水的常用方法 ADCP 距离 0. 2 0. 3 0. 4 0. 5 0. 6 0. 7 0. 2 0. 3 0. 4 0. 5 0. 6 深度 0. 1 0. 3 0. 4 0. 5 0. 6 0. 3 0. 4 0. 5 0. 2 0. 3 0. 4 0. 2 0. 3 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 20

2 灌区量水的常用方法 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 21

2 灌区量水的常用方法 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 22

主要内容 灌区量水任�和要求 灌区量水常用方法 相关的基本概念 量水��的�� 水位�量 堰槽量水 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 24

主要内容 灌区量水任�和要求 灌区量水常用方法 相关的基本概念 量水��的�� 水位�量 堰槽量水 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 29

4 量水设备的选择 精度 价格 �流范� 数据要求 运行条件 �准化 率定�度 用�适� 性 �境影响 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 30

主要内容 灌区量水任�和要求 灌区量水常用方法 相关的基本概念 量水��的�� 水位�量 堰槽量水 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 32

5 水位测量 渠道中的流量往往无法直接测量 常通过水位间接获取 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 33

5 水位测量 设备 水尺 浮子水位 计 压力传感 器 超声波水 位计 电子水尺 其它 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 35

5 水位测量 设备 超声波水位计 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 压力传感器 36

5 水位测量 静压井 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 37

5 水位测量 静压井 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 38

主要内容 灌区量水任�和要求 灌区量水常用方法 相关的基本概念 量水��的�� 水位�量 堰槽量水 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 39

6 堰槽量水 矩形薄壁堰 形式简单 测流量较大（100 L/s） 小流量下误差较大 上游易淤积 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 42

6 堰槽量水 三角形薄壁堰 精度较高（1%） V型堰 价格较低 刀口易堵塞 小流量下较准确 上游易淤积 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 43

6 堰槽量水 长喉槽 �喉槽的特征是喉段�界流 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 45

6 堰槽量水 长喉槽 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 建造 47

6 堰槽量水 长喉槽 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 预制 48

6 堰槽量水 长喉槽 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 临时 49

6 堰槽量水 长喉槽 © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 便携式 50

6 堰槽量水 长喉槽 尺寸 大型长喉槽 宽 15. 45 m; 喉段长: 3. 05 m; 流量: 56. 6 m 3/s; 水头损失: 0. 12 m © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 51

6 堰槽量水 Win. Flume www. usbr. gov/pmts/hydraulics_lab/winflume © Guanghua Guan, School of hydraulic and hydropower engineering, Wuhan University 52

谢谢！ Contact information：GGH@whu. edu. cn © 2015 Guanghua Guan, School of Hydraulic and hydropower engineering, Wuhan University