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Seepage in soil from the difference of water viscosity using Geo-studio SEEP/W program

The soil is an important material for human life. The problem that is often encountered with soil is soil contamination due to the discharge of leachate into the soil. This research aims to observe the influence of leachate viscosity on seepage using Geo-Studio SEEP/W Program. The samples of leachate were taken from ceramic industry and from Suwung landfill site. Soil samples were silty sandy taken from Ida Bagus Oka street, Denpasar, Bali. Seepage modeling in Geo-Studio SEEP/W was conducted on silty sand condition using pure water (without leachate), leachate from ceramic industry, and leachate from Suwung Disposal Site. Seepage modeling on Geo-Studio was conducted on saturated/unsaturated condition. It was found that the leachate viscosity was different each other. The viscosity of leachate from ceramic industry was 0.01366741 N s/m2 and 0.002061309 N s/m2 from Suwung Disposal Site. Due to mixed with leachate, soil hydraulic conductivity decreased from 0.001949 cm/s to 0.0001029 cm/s. The largest discharge and velocity of seepage on silty sand material from Ida Bagus Oka street, Denpasar, obtained by using Geo-Studio SEEP/W Modeling was produced by pure water (without leachate), whereas, the smallest one produced by leachate from Suwung landfill site.