Geophysical Detection Of Municipal Solid Waste

Municipal solid waste (MSW) or named municipal waste is defined the one produced in urban everyday life and services provided, and ruled by laws and administrative laws and regulations. This paper studied the geophysical characteristics of Fulongping landfill and Yehugou landfill field in lanzhou city, which located in semiarid region, by exploring with the high density resistivity method and multi-channel transient surface wave method and researching with laboratory test.The water content change of Yehugou landfill is20-25%and5-10%at the depth of7.4-19m and20-25m, respectively. The density of it decreases as the depth increases from7.4m to17m, but increase as the depth increases from17m to25m. In depth of landfills, within the scope of solid waste landfill properties change basic consistent, in the depths to certain existing properties change a turning point.As to the organic content, it presents parabola. The result of soluble salt indicates that the maximum of ion content occurs at the depth of12-13m, and the soluble salt at the depth of18-19m is mainly mirabilite and gypsum. The content of quartz and albite increases with the increasing of depth but of others mineral vary little. There is not dolomite and illite at the depth of12-13m. The depth of the solid waste landfill different, solid waste as components change. The environment where landfill different, composed of mineral composition is different also, the display of the solid waste of the complexity of the composition.The results of field exploration indicates:(i) the resistivity in overburden layer of Fulongping landfill and Yehugou landfill is39.70Ω·m and38.20Ω·m, respectively,(ii) the resistivity of life rubbish in these landfill is less than18.60Ω·m and38.20Ω·m.(iii) the wave velocity in overburden layer of Fulongping landfill and Yehugou landfill is about150-170m/s and179-198m/s, respectively,(iv) the wave velocity of life rubbish in these landfill is130-150m/s and143-198m/s. Therefore, there are many anomaly region of high resistance in landfill and its compounds are complicated.