长江科学院院报Issue(3)：5-8,4.DOI:10.11988/ckyyb.20140868
比重瓶法测验低含沙量误差分析
Error Analysis of Low Sediment Concentration Measured by Pycnometer Method
摘要
Abstract
Pycnometer method has been widely used in sediment concentration measurements such as river hydrolog⁃ical measurement, model test of river engineering, evaluation of water quality and water intake in industry and agri⁃culture. However, when sediment concentration is low, the sediment concentration measured by pycnometer method is usually greater than the actual value because the content of dissolved matter is big. In face of such phenomenon, test engineers often doubt error of test instruments or test process, but can’ t find the real reasons. Through the sedi⁃ment concentration measurement of desilting basin test of water supply in a city, we found that the content of dis⁃solved matter in the water is crucial to the measurement error of low sediment concentration;nevertheless, tempera⁃ture greatly affects sediment concentration, and the smaller the sediment concentration is, the bigger the effect of temperature error is. On this basis, we put forward the improved pycnometer method to measure low sediment con⁃centration, and test results by the method is basically consistent with those by drying method. Finally, it can pro⁃vide reference for test with low sediment concentration.关键词
比重瓶法/低含沙量/误差影响因素/温度/溶解质Key words
pycnometer method/low sediment concentration/influencing factors of error/temperature/dissolved matter分类
建筑与水利引用本文复制引用
吴彰松,张根广,梁宗祥,邢茹..比重瓶法测验低含沙量误差分析[J].长江科学院院报,2016,(3):5-8,4.基金项目
国家自然科学基金项目 （）
