中国地质调查2025，Vol.12Issue(5)：92-100,9.DOI:10.19388/j.zgdzdc.2023.290
基于多频电磁技术的吉林市温德河泥沙分布
Sediment distribution of Wende River in Jilin City based on multi-frequency electromagnetic technology
摘要
Abstract
River sediment has dual properties of disaster and resource.How to seek advantages and avoid disad-vantages is a key problem during practical process.Using geophysical method to efficiently detect the distribution of river sediment is an important mean to solve problems above.The river sediment of Wende River in Jilin city was taken as the main research object,and GEM-2 multi-frequency electromagnetic instrument was used to carry out the electromagnetic measurement of river sediment with a length of about 20 km at five frequencies of 425 Hz,1 475 Hz,5 175 Hz,24 075 Hz,and 63 025 Hz,and an average line spacing of 60 m,based on the high sensitivity of electric exploration to low resistivity anomalies.The plane position and depth range of the river sediment were defined based on post-processing data.The results show that multi-frequency electromagnetic in-strument GEM-2 can effectively detect the distribution of river sediment,and the boundary of sediment stratifica-tion is relatively clear.Based on the apparent conductivity contour map and the apparent resistivity-depth inver-sion map of the survey line,it could be inferred that the sand layer may be distributed at a depth of 2 m,6 m and 10 m below the water surface respectively,corresponding to the detection depths of high-frequency 63 025 Hz and mid-frequency 5 175 Hz and low-frequency 425 Hz of GEM-2 instrument.The results obtained could provide theoretical and practical basis for similar exploration and research in future.关键词
河流泥沙/多频电磁仪/温德河/地球物理Key words
river sediment/multi-frequency electromagnetic instrument/Wende River/geophysics分类
地球科学引用本文复制引用
刘裕,周路旭,路宁,郑红闪,黄威,丁志强..基于多频电磁技术的吉林市温德河泥沙分布[J].中国地质调查,2025,12(5):92-100,9.基金项目
国家自然科学基金"基于物理信息神经网络的航空电磁三维快速正演研究(编号:42204147)"、中央级公益性科研院所基本科研业务费"地球内生电磁场探测技术研究、探地雷达技术在模拟月球探测中深度及分辨率比对试验与研究(编号:AS2022J01、AS2023J03)"及中国地质调查局"北山成矿带及周缘地区航空物探综合调查(编号:DD20230245)"项目联合资助. （编号:42204147）
