PLANNING FOR DETERMINING THE LOCATION OF INTEGRATED WASTE PROCESSING SITE (TPST) USING A GEOGRAPHIC INFORMATION SYSTEM (GIS) AND THE SIMPLE ADDITIVE WEIGHTING (SAW) METHOD IN DENPASAR CITY, BALI

Abstract

The waste problem in big cities in Indonesia is still an environmental issue that never ends. By increasing the population, land conversion in several areas, lack of waste processing facilities, and lack of awareness are factors contributing to the waste problem. In 2020, waste services in Denpasar only reached 67.5%, so management of the waste produced is not yet optimal. An integrated waste processing method from upstream to downstream is needed before the waste ends up in the landfill. By functioning optimally, the quality and quantity of waste processing at the TPST in Denpasar, the presence of an overcapacity landfill in Suwung can reduce the burden of waste in the landfill. The existence of a TPST is very necessary in Denpasar, which so far has not been optimal, so a decision is needed to determine the location of the TPST in the Denpasar area. There are 2 methods used in the research method: the first is the use of the SAW method of decision-making system (DSS), and the second is the digitization of mapping using GIS. Analysis of the decision-making system (DSS) using the SAW method uses mathematical analysis, decision matrices, and priority scales. The results of the research show that the priorities for determining TPST locations were obtained by areas that were priority I for TPST development using the SAW method, namely Kesiman and Padang Sambian, with a value of 80–100. The priority I area is also included in the low rainfall area category according to rainfall data for the Denpasar city area. There are 10 priority II regions and 25 priority III regions. Thus, the Kesiman and Padang Sambian areas have the highest priority compared to other areas in Denpasar, Bali, for TPST development.