Abstract
Oxygen is dissolved in the water as a free gas and is frequently treated as an index of contamination during water quality studies. This value is affected by the weathering of rock and is reduced by the decomposition of organic material. It is, therefore, assumed that the deeper the groundwater and the longer it has been in the aquifer, the lower its dissolved oxygen content. Other good points about dissolved oxygen are that it is easily diluted and once dissolved in water its vertical motion is small. For these reasons, a method of exploring groundwater flow strata using it as a tracer was carried out in a landslide area and a groundwater flow stera model.
