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| 巴歇尔槽测量雨水径流流量方法及其改进研究 |
| Method and Improvement for Stormwater Runoff Flow Measurement of Parshall Flume |
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| DOI： |
| 中文关键词: 巴歇尔槽 雨水径流 流量测量 模型改进 率定试验 |
| 英文关键词: Parshall flume Stormwater runoff Flow measurement Model modification Calibration test |
| 基金项目:国家水体污染控制与治理科技重大专项基金资助项目（2010ZX07320-002，2010ZX07320-003）;北京建筑大学“城乡建设与管理”产学研联合研究生培养基地基金资助项目 |
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| 中文摘要: |
| 流量是研究城市非点源污染负荷和雨水径流污染物迁移转化规律的一项基本参数。针对明渠雨水径流流量测量问题，设计了改进的巴歇尔槽模型，通过水力特性试验率定该模型的水力参数，拟合出自由出流条件下水深－流量公式及上游水位与模型水头损失之间的关系，结合1〖JP20〗∶〖JP〗2长度比尺缩小模型对改进槽型使用弗劳德模型律进行验证。结果表明，所建立的改进巴歇尔槽模型其拟合曲线R2＞0.990，相对误差的绝对值＜5%，精确度较好，改进之后的槽型用于雨水明渠流量测量十分有效。 |
| 英文摘要: |
| Rainwater open channel flow is the basic data of migration and transformation rule of urban non point source pollution load and the rainwater runoff pollutants. This paper mainly used the modified model of Parshall flume to study the measurement method of rainwater in open channel flow. The design parameters of the model were determined through hydraulic characteristics experiment. Under the condition of free flow, the formula of depth flow and relations between the upstream water level and the head loss of model were figured out. And these were validated by Froude similarity criterion on the improved groove type by the 1〖JP20〗∶〖JP〗2 length scale shrunken model. The results showed that R2 of the fitted curve of the modified model of Parshall flume was more than 0.990 and the relative error was within 5%. The improved groove type was efficient in determining the open channel rainwater flow. |
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