Tiga Dihaji Dam Access Route Plan Alternative using Geographic Information System (Cost Distance Method)

Abstract

The Tiga Dihaji dam access route function is destined for heavy equipment during the dam construction period. It is located on Tiga Dihaji sub-district, Ogan Komering Ulu Selatan district, South Sumatera, Indonesia. The Tiga Dihaji access route supervisor stated that the planning justification was done using expert judgement based on contour map and local land cover. This method is considered less measurable. Therefore, the Geographic Information System method is offered in this paper to determine the most suitable Tiga Dihaji dam access route. The parameters considered are landslide vulnerability, land cover and construction factors. These parameters are overlaid based on weights determined by the Public Works Department then validated by expert judgement. The new route is proposed using the cost distance method. Based on the analysis, it can be concluded that the cost distance method is more measurable than the planned method, but this method produces a less suitable route in terms of civil engineering.

Research on the Development Potential of China’s Pro-Poor Tourism Industry Based on Geographical Nature Evaluation

“…The cost distance method was used to calculate the accessibility from each scenic spot in the region to the poverty alleviation village. The calculation progress is as follows [76,77]: a 1 km × 1 km grid was used to rasterize the original vector map, and the different speeds of various road types according to the driving speeds of different road networks based on national laws were set. Subsequently, the speed intervals for accessibility of different land utilization types were set based on China's land utilization classification data (Table 2).…”