3-D DC resistivity data inversion for the imaging of a volcanic aquifer,Republic of Djibouti

摘要：

A full 3D inversion code of DC resistivity data is presented. The objective is to interpret a large number of vertical electrical soundings collected over years in the Republic of Djibouti over a 20x30km area.The purpose of the study is to characterize the geometry of the main aquifer of Djibouti controlled by a heterogeneous network of fractures in basalts. The 3D inversion is based on an iterative procedure using a non-linear steepest gradient method. The forward calculation is made with a 3D finite difference forward modelling (Spitzer, 1995). The resolution of the 3D inversion is tested with synthetic data. Finally, we present the application of the 3D imaging tool on a subset of the data collected in Djibouti.

关键词： DC resistivity sounding 3D inversion hydrology fractured basalts

作者: HASSAN Magareh HAUTOT Sophie TARITS Pascal JALLUDIN Mohamed

作者单位: IUEM-UBO, UMR CNRS6538 Domaine Océaniques, Brest, France;CERD, Djibouti, Republic of Djibouti IUEM-UBO, UMR CNRS6538 Domaine Océaniques, Brest, France CERD, Djibouti, Republic of Djibouti

会议类型: 国际会议

会议名称: The 19th International Workshop on Electromagnetic Induction in the Earth(第十九届国际地球电磁感应学术研讨会)

会议地点: 北京

会议语种:英文

页码: 583-588

在线出版日期: 2008-10-23（万方平台首次上网日期，不代表论文的发表时间）