水科学进展Issue(6)：829-836,8.DOI:10.14042/j.cnki.32.1309.2015.06.009
高坝泄洪水面曲面及流速场的原型测量方法
An in-situ method for measuring surface topography and velocity field of flood flow discharged from high-dam reservoir
摘要
Abstract
Large⁃scale flood flows discharged from high⁃dam reservoirs are extremely difficult to measure due to the presence of fast developing, highly fluctuating flow surfaces. This study presents a novel in⁃situ method suitable to mo⁃nitor surface topography as well as velocity fields of such complex flows. The new method combines stereo photogram⁃metry and large⁃scale particle image velocimetry ( PIV) . The two⁃camera stereo photogrammetry adopts the SIFT ap⁃proach for spotting and matching distinct points, and to enhance measurement accuracy and efficiency the internal and external camera parameters are calibrated separately. The large⁃scale PIV system traces texture of the surface flow through image acquisition, grey standardization, background removing, and median filtering. Real surface velocity field is constructed from velocity field and surface topography measured by two cameras simultaneously. Application of the new method to Xiangjiaba project has been successful.关键词
高坝泄洪/水面流场/水面曲面/特征点/三维重构Key words
flood flow discharged from high dams/surface velocity field/surface topography/feature point/three-dimensional reconstruction分类
建筑与水利引用本文复制引用
钟强,陈启刚,曹列凯,李丹勋,王兴奎..高坝泄洪水面曲面及流速场的原型测量方法[J].水科学进展,2015,(6):829-836,8.基金项目
国家自然科学基金资助项目（51279081）；“十二五”国家科技支撑计划资助项目（2012BAB04B01） The study is financially supported by the National Natural Science Foundation of China （ No?51279081） and the National Key Technologies R＆D Program of China during the 12th Five-year Plan Period （ No?2012BAB04B01）． （）
