Analysis of the Influence of Factors in the Selection of Dam Types in the Muara Joloi River, Murung Raya Regency

Abstract

A dam site location is usually suitable for more than one type of dam. Dams are not only useful but also change the landscape, store hazard risks and require large costs. Therefore, selecting the right location and type of dam is a must. The selection of the type of dam for a particular location must be based on an evaluation of the various types of dams that are possible and consider risk factors, costs, and environmental impacts. Given that the selection of the location and type of dam considers more than one important factor, an appropriate multi-criteria decision analysis is needed. Currently, the application of Multi Criteria Decision Making (MCDM) in relation to the analysis of dam construction priorities (determining the best location and type of dam) has been developed. There has been a development of a hybrid method of multi-criteria analysis using the hybrid Delphi-AHP (Analysis Hierarchy Process) technique and a preference ordering technique based on similarity to the ideal solution (TOPSIS). The criteria, sub-criteria and sub-sub-criteria used in the study are the result of consensus from knowledgeable and experienced sources in the field of dams. From the analysis results, it was found that the factors that influence the selection of dam types are Topographic Conditions, Foundation Geological Conditions, Construction Materials, Spillover Position, Construction Implementation, Environmental Issues and Construction Costs. Both the AHP and TOPSIS methods, environmental factors are the main factors considered in selecting the Muara Juloi dam type.