Rating Curve Modification at Low Discharges Using Physical Model Tests

• 作者: Hau-Wei Wang Jihn-Sung Lai Shun-Chung Tsung Yun-Ling Chen
• 来源期刊: 世界工程和技术(英文)
• 学科: 医学
• 关键词: PHYSICAL Model Test Yuanshanzi DIVERSION WORK RATING CURVE
• 年，卷（期）: 2015,（2）
• 页码范围: 50-56
• 页数: 7页
• 分类号: R73

摘要

Hydraulic structure is designed based on hydraulic theories or guidelines. To ensure performance, physical model tests are often used at high discharges. However, high discharge in river is rare. Physical model tests at high discharges will probably lead biased hydrological relationship. To improve hydrological relationship at low discharges, in this study, we considered the diversion rating curve of the Yuanshanzi Diversion Work. The 1/100-scaled physical model tests at low and high discharges (90 - 1620 m3/s) were performed and coupled the diversion discharges of 5 flood events (2009-2010) in field. The official diversion rating curve was built only based on physical model tests at high discharges (837 - 1620 m3/s). The results of physical model tests in this study suggested the official diversion rating curve should be modified considering all tests. The modifications showed the official diversion rating curve was over-estimated. A complete series of physical model tests and considering field situations, in this study, indicated expanded physical model tests and constantly field measurements were therefore necessary for hydraulic structure, which provided information to modify used hydrological relationship to fit real situations.