Identification of Groundwater Level by Using Geoelectrical Resistivity Method at Fincha’a Sugar Estate, Blue Nile Basin, Western Ethiopia

Abstract

Good water management and improved drainage can minimize yield reductions caused by waterlogging and thus increase profitability. Waterlogging became a very severe problem in some of the irrigated fields of Fincha'a Sugar Estate in the Blue Ni Basin of western Ethiopia. As a result many productive agricultural lands were abandoned. A measurement of geoelectrical resistivity at the selected irrigated fields by using Schlumberger array with the space of potential and current electrode was found to be 2 m. The positions of centre sounding measurements to be investigated were at different points along the traverse line (subsurface area). The objective of this study was to identify the depth of the groundwater table in relation to subsurface lithology. The shallow ground water was identified at the depth of 1.5, 2.06, 3.18 and 2.49 m with resistivity values of 3.76, 5.42, 49.3, and 29.4 Ω (VES 2), (VES 3) and (VES 4) respectively. While the deep ground water table confined on the course range from the depth of 3.96 to 11.6 m with the resistivity value of 3.96 to 11.6 Ω-m.The variation of resistivity values from each position of ground water shows the variation of variation of crack dimension and variation of medium type. It was identified that the selected irrigated fields are under severe to critically waterlogged conditions. Deeper regolith (3.18 below the water table, due to low salinities in the groundwater and coarser textures.

Identifikasi Akuifer Air Asin Dan Air Tawar Berdasarkan Model Tahananjenis Dan Data Bor Di Sidoarjo, Jawa Timur

“…Metoda tahananjenis geolistrik menjadi pilihan utama dalam penyelidikan bawah permukaan dangkal (Martorana, Capizzi, Alessandro, & Luzio, 2016), penyelidikan bawah tanah (Laxmi & Ramadass, 2012) dan investigasi air bawah tanah (Khan, Waheedullah, & Bhatti, 2013), serta untuk mengetahui kondisi hidrogeologi dan muka air bawah tanah (Kitila, Lemessa, Gebrekidan, & Alamirew, 2013). Metode geolistrik sering digunakan karena adanya korelasi antara besarnya tahananjenis lapisan tanah bawah permukaan dengan kondisi geologi dan hidrogeologi air bawah tanah (Boubaya, 2017), adanya korelasi antara tahananjenis dengan parameter geologi lain seperti mineral batuan, fluida (Jufriadi & Ayu, 2014), adanya korelasi antara tahananjenis porositas serta permeabilitas batuan (Helaly, 2017), adanya korelasi antara sebaran tahananjenis dengan jenis lapisan tanah (Pranata, Jufriadi, Ayu, & Wahyuningsih, 2016), serta mudah dan efisien dalam pelaksanaan (Wiyono, Lailatin, & Jufriadi, 2019).…”

Underground Water-Level Monitoring by Integrated Study of Geoelectric, Logging, Cutting and Pumping Data in Industrial Area of Candi Sub-District, Sidoarjo

“…Geophysical methods are generally used for hydrogeological research (Boubaya, 2017), underground water investigations (Laxmi & Ramadass, 2012), underground water level investigations (Kitila, Lemessa, Gebrekidan, & Alamirew, 2013), and specifically the geoelectric method, an important and widely used method in underground water investigations (Khan, Waheedullah, & Bhatti, 2013). This is due to the fact that this method is easy, fast, and efficient (Wiyono, Lailatin, & Jufriadi, 2019), and there is a strong correlation between the hydrogeological conditions of underground water and the resistivity of the soil layer (Boubaya, 2017).…”