Application of electrical resistivity tomography in Land Creation Project

• 1、Lanzhou University,Lanzhou City 730000

Abstract：Urbanization is an inevitable process in urban development.Lanzhou, as a representative valley belt city sandwiched between two mountains and one valley on the Loess Plateau, is faced with the shortage of land resources in the process of urbanization.In recent years, lanzhou and its surrounding areas have started the low-hill and gentle slope land building project, which has created a lot of land resources and formed some hidden dangers of geological disasters at the same time.In this study, a site in Qingbaishi, Lanzhou city was taken as the study area, remote sensing images and on-site exploration were used to analyze the topography changes before and after the pingshan reclamation, and high-density electric method was used to verify and analyze the groundwater changes in the Pingshan reclamation area.The results of high-density electric method showed that the high-moisture loess was mainly distributed in the low-lying gully before the plantings, and all of them were close to or reached the saturation state, forming a temporary stagnant water layer, and then diffusing to both sides of the gully to form a larger area of saturation;In addition, the enriched groundwater may permeate to the lower part of the undisturbed loess, and then uplift the saturated fill to disturb the loess.

Keywords： Land Creation Project Electrical Resistivity Tomography groundwater Lanzhou