| Summary: | 碩士 === 國立成功大學 === 資源工程學系碩博士班 === 97 === The permeability of the mudstone in the southwest Taiwan is extremely now. The mudstone covers over than thickness of a kilometers. Regarding mudstone as the lining material in the landfill is feasible. If we can suit the measure to local conditions, adopt abundant mudstone of the southwest Taiwan to be the nature lining material. It will availability smooth over the problem of the waste disposal. So we selected an unworked landfill in a mudstone area of Taiwan to understand by in-situ test if the groundwater will be polluted after the landfill works, and know whether there is a fault with potential disaster in the neighborhood or not. We discuss the influence of the neighboring earthquake on the groundwater.
Through the in-situ investigation, we know the strike of the layer is Northeast-southwest, dip slope southeast and dip angle less than 45°. According to drilling materials, rock was mainly clayey mudstone, inserted the thin layer siltstone in the mudstone occasionally. Through the in-situ Slug test, groundwater velocity and direction test, we found the groundwater in this place flows from west to east and flows out by the gap of the southeast, with geography to conform. The result of the slug test reveals the mudstone permeability coefficient of layer is between 7.08×10-5 ~ 6.23×10-3 m/day (8.20×10-8 ~ 7.21×10-6 cm/sec). It is a layer with extremely bad permeability. The continuous data of water level for about 1.5 years show the rainfall and surface water don’t affect the groundwater of the place directly. From the distribution of microseism, we have not found faults with the activities related to the earthquake clustering phenomenon. In about 3 years during the investigation, the earthquake we measured did not affect the groundwater movements.
|
|---|
