Original scientific paper
https://doi.org/10.17794/rgn.2025.3.1
GROUNDWATER POTENTIAL MAPPING (GWPM) USING ANALYTICAL HIERARCHY PROCESS (AHP) IN BENGKULU CITY, INDONESIA
Citra Febiola Ariska
; Department of Geophysics, Faculty of Mathematics and Natural Sciences, the University of Bengkulu, Jl. WR Supratman, Bengkulu, 38371, Indonesia
Darmawan Ikhlas Fadli
; Department of Geophysics, Faculty of Mathematics and Natural Sciences, the University of Bengkulu, Jl. WR Supratman, Bengkulu, 38371, Indonesia
*
Muhammad Afif Nabhan
; Department of Geophysics, Faculty of Mathematics and Natural Sciences, the University of Bengkulu, Jl. WR Supratman, Bengkulu, 38371, Indonesia
Rahma Alshenta Nugraha
; Department of Geophysics, Faculty of Mathematics and Natural Sciences, the University of Bengkulu, Jl. WR Supratman, Bengkulu, 38371, Indonesia
Belliya Hafiza
; Department of Geophysics, Faculty of Mathematics and Natural Sciences, the University of Bengkulu, Jl. WR Supratman, Bengkulu, 38371, Indonesia
Isra Amalia
; Department of Geophysics, Faculty of Mathematics and Natural Sciences, the University of Bengkulu, Jl. WR Supratman, Bengkulu, 38371, Indonesia
Erlan Sumanjaya
; Department of Geodesy and Geomatics Engineering, Faculty of Engineering, the University of Lampung, Jl. Prof. Dr. Sumantri Brojonegoro No. 1, Bandar Lampung 35141, Indonesia
Arif Ismul Hadi
; Department of Geophysics, Faculty of Mathematics and Natural Sciences, the University of Bengkulu, Jl. WR Supratman, Bengkulu, 38371, Indonesia
Refrizon Refrizon
; Department of Geophysics, Faculty of Mathematics and Natural Sciences, the University of Bengkulu, Jl. WR Supratman, Bengkulu, 38371, Indonesia
Ayu Maulidiyah
; Department of Food Safety and Quality Regulatory, Cargill Tropical Oils Asia Region 5, Sungai Lilin Musi Banyuasin, 30755, South Sumatera, Indonesia
* Corresponding author.
Abstract
Rapid urbanization and industrial expansion have led to heightened water demand. Groundwater plays a crucial role in urban settings for sanitation, drinking water, and agriculture. This research seeks to assess groundwater potential in Bengkulu City, Indonesia, employing the Analytical Hierarchy Process (AHP). The study incorporates eight primary factors: lineament density, drainage density, precipitation, geomorphology, geology, slope, land cover, and elevation. A multicollinearity test confirmed the absence of multicollinearity among these parameters. The pairwise comparison matrix produced a consistency ratio of 0.098 (9.8%), indicating acceptable consistency in parameter comparisons. Overlay-weighted linear combination (WLC) analysis categorized the groundwater potential into five levels: very high (2.9% or 3.83 km²), high (50.9% or 67.47 km²), moderate (35.2% or 46.71 km²), low (5.2% or 6.88 km²), and very low (5.8% or 7.64 km²). The AHP model yielded strong performance metrics, including a ROC value of 0.89, accuracy of 0.81, MAE of 0.19, RMSE of 0.43, Kappa of 0.62, precision of 0.86, recall of 0.80, and an F1-score of 0.83. Precipitation, lineament density, and drainage density were the key factors affecting groundwater potential. This study shows that the AHP method is highly effective for mapping groundwater potential, especially in urban areas like Bengkulu City. The results can assist in making informed decisions regarding well drilling for drinking water, agricultural purposes, and artificial recharge projects, contributing to sustainable groundwater management in the region.
Keywords
AHP; Bengkulu City; GIS; groundwater potential zone
Hrčak ID:
333252
URI
Publication date:
3.7.2025.
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