| 流速仪比较与林边溪流量量测 |
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| 引用本文： | 江介伦,杨翰宗,吕育轩,吴佳颖,简志耿.流速仪比较与林边溪流量量测[J].水土保持研究,2012,19(1):277-280. |
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| 作者姓名： | 江介伦 杨翰宗 吕育轩 吴佳颖 简志耿 |
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| 作者单位： | 1. 屏东科技大学水土保持系,台湾屏东912
2. 树德科技大学休闲事业管理系,台湾高雄824 |
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| 摘 要： | 该研究于屏东县来义乡林边溪上游,采用电磁式流速仪、旋杯式流速仪及超声波数位流速仪,进行河川流速量测,并比较三种仪器所实际量测获得数据差别及其实用性,在枯水期进行河川流量量测时水位较低,可利用一点法或两点法量测其流速,并以平均断面法计算出流量,在低水位时,旋杯式流速仪会因为水流速度太小使旋杯无法转动,因此在低水位时,可以电磁式流速仪或超声波数位流速仪进行流量量测。量测结果显示林边溪α值(R/D)约在0.911～1之间,而流量Q<10cm/s时,α值非常趋近于1,当流量Q>10cm/s时,α值大约在0.91～0.96,流量Q>10cm/s时,水面宽度T及水力深度D的改变量较大。
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| 关 键 词： | 水力半径 水力深度 湿周 流速仪 |
Comparison and Application of Current Meters for River Discharge of Linpien River |
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| Institution: | CHIANG Jie-lun1,YANG Han-chung2,LU Yu-hsuan1,WU Chia-ying1,CHIEN Chih-keng1(1.Department of Soil and Water Conservation,National Pingtung University of Science and Technology,Pingdong,Taiwan 912,China;2.Department of Leisure,Recreation and Tourism Management,Shu-Te University,Gaoxiong,Taiwan 824,China) |
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| Abstract: | The study area is located in the upstream Linpien River in Laiyi Township,Pingtung County.Electromagnetic velocimeter(FP111),price type AA meter and acoustic digital current meter(ADC) are adopted to evaluate river velocity in this study.By comparing the acquired data from three instruments,the differences and applicability are discussed.During the dry season,the river level is low.One-point and two-point methods of stream gauging are used to evaluate the river velocity.Mean-section method is used to evaluate the river discharge.In the low river level,price type AA meter can’t operate in the low river level because of the low river velocity.Instead,FP111 or ACD is used to evaluate river velocity in the low river level.The results showed α(R/D) is between 0.911～1 and when river discharge is higher than 10 cm/s,the relationship between the Top Width and Hydraulic Depth changes more obviously. |
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| Keywords: | hydraulic radius hydraulic depth wetted perimeter current meters |
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