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All Journal G-Tech : Jurnal Teknologi Terapan
Noveriady Noveriady
University of Palangka Raya
Computer Science & IT Decision Sciences, Operations Research & Management Energy Engineering

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Application of the Inverse Distance Weighting (IDW) Method for Determining the Area of Influence Based on Land Suitability Ranking of Rubber Plantations in a Mining Area Noveriady Noveriady; Novalisae Novalisae; Neny Fidayanti; I Putu Putrawiyanta
G-Tech: Jurnal Teknologi Terapan Vol 10 No 4 (2026): G-Tech, Vol. 10 No. 4 October 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/gtech.v10i4.11430

Abstract

Conducting a land suitability study in areas surrounding mining operations is important for proper land-use planning, for example, for rubber plantations (Hevea brasiliensis). In this study, the Area of Influence (AOI) was determined based on the land suitability rating for rubber using Inverse Distance Weighting (IDW). Samples at three locations (SR 1, SR 2, and SR 3) were taken and tested for pH, organic C, total N, P-Bray I, exchangeable K, CEC, bulk density, and texture. The suitability was classified according to the FAO framework by means of the maximum limiting factor method. The findings indicated that SR 1 and SR 3 were only marginally suitable (S3), whereas SR 2 was not suitable (N) because of its extremely low pH (3.87) and its peat properties. When IDW with a power of 2 was used, effective buffer radii of 330.23 m were obtained for SR 1 and 591.93 m for SR 3. The Voronoi polygon analysis resulted in an S3 AOI of 8.77 ha. Following overlay with the mining area, the effective buffer amounted to 181.14 ha out of the initial 227.26 ha before clipping. This AOI thus gives a spatial basis for prioritising amelioration in the S3 area by means of liming, fertilisation and the addition of organic matter, while the N area should be avoided or converted to crops that are more tolerant.
Co-Authors I Putu Putrawiyanta Neny Fidayanti Novalisae Novalisae