利用电测深法探测泃河与错河古河道  

Old course detection of Juhe and Cuohe river by electric sounding method

作　　者：郭高轩[1] 刘文臣[1] 辛宝东[1] 陆海燕[1] 张新钰[1] 

机构地区：[1]北京市水文地质工程地质大队,北京100195

出　　处：《工程勘察》2010年第4期87-90,共4页Geotechnical Investigation & Surveying

摘　　要：沿垂直于泃河、错河冲洪积扇主轴的方向,布置电测深剖面,统计了不同岩性的电性特征。通过绘制不同深度的ρs等值线图、ρs断面图以及各测线的对称四级剖面线图,初步确定了泃河与错河主要古河道的位置。剖面对比的结果表明,泃河、错河在早更新世摆动较小,在中晚更新世和全新世摆动幅度较大,形成规模不同的多期古河道。实践证明,扫面电测深法是确定山前冲洪积平原古河道的位置、期次和规模的有效手段。Through the electric sounding detection along the cross section,which are perpendicular to the axle of alluvial fan of Juhe and Cuohe river,the electric difference of the quaternary sediments are analyzed. The old course locations of Juhe and Cuohe river are determined by drawing the ρs contour map,ρs profiles and ρs curves under different AB /2 value. Also,the period and time of old course of Juhe and Cuohe are discussed roughly. The analysis results show that the old Juhe and Cuohe river had changed its channels for many times in middle pleistocene,late pleistocene,and holocene. This work indicates that the electric sounding method is quite powerful and effective in the survey of the locations,periods and times,the scopes in piedmont alluvial- pluvial plain.

关 键 词：泃河 错河 电测深 古河道 

分 类 号：P631.322[天文地球—地质矿产勘探]