Seepage Analysis on Dam Design Alternatives Using GeoStudio Software (Case Study of Way Sekampung Dam)

Abstract

The Way Sekampung Dam Project in Pringsewu Regency, Lampung Province is the location of this research. This dam uses an embankment-type dam, whose heap consists of several material zones that make up the body of the dam. With the availability of material from dam heaps in the field and the discourse of design modifications, it is necessary to carry out a large analysis of the seepage discharge against alternative dam designs. Large analysis of this seepage discharge using Geostudio 2012 software used the SEEP/W method of steady-state. Modeling used the input properties of each material that had been tested in the laboratory. The figure of the amount of seepage discharge (Q) was obtained from the phreatic line in the analysis. The output resulting from this analysis was the magnitude of the seepage discharge (Q) in the design dam body, alternative 1 (one) 0.0000001409 m³ / second and alternative 2 (two) 0.00000194 m³ / second which could be concluded that the seepage discharge that occurred in the dam body still met the conditions set. Keywords: Seepage, Dam Design, Geostudio.