Identification of potential groundwater locations using geophysical data and fuzzy gamma operator model in Imo, Southeastern Nigeria

Abstract

Groundwater is among the most important resources of water supply of the worldwide population. The objective of this research is to select the most suitable drilling location of new groundwater wells, with a decision-making tool using geographic information system (GIS). The optimum location was evaluated based on the hydro-geoelectrical parameter derived from vertical electrical sounding (VES) including longitudinal conductance, aquifer thickness, aquifer resistivity, transmissivity, formation factor, and porosity. The analysis of the VES data revealed that the porosity values range from 1.8 to 21%, the formation factor values vary between 0.0355 and 0.14, the transmissivity values range from 3.4 to 6 m 2 /day, the longitudinal conductance values vary from 3 to 4.6 Ω −1 , the aquifer thickness values range from 4.1 to 8.5 m, the aquifer resistivity varies between 0.7 and 40 Ω m. Hydro-geoelectrical data were integrated into GIS to precisely determine the best location for groundwater wells. Fuzzy liner membership was used to standardize the criteria layers; then, these layers were combined using fuzzy gamma overlay to produce the suitability map. The study area was classified into four classes: excluded, low suitability, moderate suitability, and high suitability. It is recommended that this method should be adopted by different governmental agencies involved in water resources management in Nigeria.

Geophysical and geological contribution to determining the neritic limestone aquifer structure of Hammam Bradaa – El Fedjoudj (Seybouse medium), Northeastern Algeria

“…The tectonic map of the study area was compiled based on the results of all geoelectrical sections developed taking into account the location of the faults marked on the sections [26]. On this tectonic map (Fig.…”

Analisis Spasial Potensi Ekonomi dengan Fuzzy Overlay di Sekitar Bandara Internasional Jawa Barat

“…Logika fuzzy salah satu pemodelan yang dapat digunakan untuk menangani masalah ketidaktepatan dalam geografis manajemen basis data, permintaan data, analisis data spasial dan pengembangan sistem pendukung keputusan spasial. Beberapa penelitian yang pernah dilakukan dengan menerapkan logika fuzzy pada SIG diantaranya analisis kesesuaian lokasi pengembangan perumahan dan didapatkan bahwa model fuzzy lebih efisien daripada model boolean dalam memodelkan data yang tidak pasti (Adhikari & Li, 2013), penelitian untuk mengidentifikasi lokasi potensial air tanah yang menghasilkan peta kesesuaian dengan empat klasifikasi yaitu: excluded, low suitability, moderate suitability, dan high suitability (Abdulrazzaq et. al., 2020), serta analisis lokasi untuk perencanaan sumber daya lahan yang salah satu hasilnya menyatakan bahwa fungsi fuzzy overlay memberikan hasil kesesuaian lokasi yang lebih baik jika dibandingkan dengan hasil dari fungsi weighted overlay (Baidya et.…”

“…Fuzzy Overlay dapat melakukan analisis untuk beberapa himpunan dengan analisis multi-kriteria. Software ArcGIS menyediakan lima metode penggabungan data berdasarkan teori analisis himpunan, yaitu fuzzy OR, fuzzy AND, fuzzy sum, fuzzy product, dan fuzzy gamma (Abdulrazzaq et. al., 2020).…”

Using VES and GIS-Based DRASTIC Analysis to Evaluate Groundwater Aquifer Contamination Vulnerability in Owerri, Southeastern Nigeria

“…Groundwater resources play a critical role in meeting the water demands of many communities worldwide. However, these resources are susceptible to contamination from various anthropogenic and natural factors (Abdulrazzaq et al, 2020). Vulnerability studies for groundwater aquifers are therefore necessary to identify areas that are at risk of contamination and to develop appropriate management strategies (Tirkey et al, 2013;Adewumi et al, 2023).…”