摘要
针对现有物理滤波技术的局限性,在波浪频段分析的基础上,提出了基于理想频域低通滤波器的水位防风数据修正技术,并以青草沙水库库内外水位为例对该方法进行验证。结果表明,滤波后数据无明显偏差,且修正数据平滑度明显增大,证明了数据手段的有效性。通过调节截止频率,该方法可适用于不同功能的水库水位监测和库容准确估算。
Based on ideal frequency domain and low-pass filter, a new technology was provided to deal with the waterlevel error caused by wind due to the limitation of existing filtering technology. The water level data of Qingcaosha reser-voir were applied to analyze wave classification according to different frequencies. It was found that there was less signifi-cant deviation between the raw data and the filtered data. Morever, the smoothness of filtered data is improved obviouslySo, it proved the effectiveness of the filter. The technology can apply to different water level monitoring events and accu-rate estimation of reservoir capacity through turning cut-off frequencies.
出处
《水电能源科学》
北大核心
2014年第12期30-32,共3页
Water Resources and Power
基金
国家自然科学基金项目(51379146)
