黄河冰凌地电测试曲线小波分析及预警技术  

Wavelet analysis of geo-electric measurement curve for ice jam of Yellow River and early warning technique

作　　者：丛沛桐[1] 王瑞兰[2] 李艳[1] 屈寒飞[1] 吴卫熊[1] 王启[1] 

机构地区：[1]华南农业大学水利与土木工程学院,广东广州510642 [2]广东省水利水电科学研究院,广东广州510610

出　　处：《水利水电科技进展》2008年第1期62-65,共4页Advances in Science and Technology of Water Resources

基　　金：国家自然科学基金;水利部黄河水利委员会黄河联合研究基金(50379036)

摘　　要：采用地电测试技术对黄河冰水两相流进行视电阻率测试,绘制了电测深曲线。曲线经小波分解后,2个水平分解的曲线类型差异都十分显著,且平稳流凌时曲线无明显阈值,端点(河床淤泥)视电阻率值为15.52Ω.m,而局部冰塞时曲线经过2个水平分解后的阈值为6.68Ω.m。现场测试及小波分析表明:黄河封河期间平稳流凌与出现冰塞时的电测深曲线有明显差异,可以通过曲线特征和总体阈值进行判别。The apparent resistivity of the ice-water two-phase flow was measured by use of the geo-electric measurement technique, and the resistivity sounding curve was plotted. Two types of curves obtained by wavelet decomposition of the resistivity sounding curve in horizontal direction were of obvious difference. For stable ice jam flow, the decomposed curve has no obvious threshold, and the resistivity at the end is 15.52Ω·m, while for local ice jam, the decomposed curve has the threshold of 6.68Ω·m. Field test and wavelet analysis show that, the decomposed curves for different conditions are easy to be distinguished by their characteristics and total threshold.

关 键 词：黄河冰凌 地电测试 预警技术 小波分析 

分 类 号：TV875[水利工程—水利水电工程]