Assessment of Economically Accessible Groundwater Reserve and Its Protective Capacity in Eastern Obolo Local Government Area of Akwa Ibom State, Nigeria, Using Electrical Resistivity Method

Table 1

Summary of location coordinates, geoelectrical layer properties and protective strength of the study area.

VES; number	Latitude; (degree) 𝑦 (m)	Longitude; (degree) 𝑥 (m)	Bulk resistivity of layers from top to bottom of the economic aquifer (Ωm)				Thickness of layers from top to bottom of economic aquifer (m)			Depth to economic aquifer (m)	Longitudinal conductance; 𝑆 (Ωm)	Economic; aquifer fractional porosity	Protective strength	Curve type
			𝜌1	𝜌2	𝜌3	𝜌4	ℎ1	ℎ2	ℎ3
1	2982	176	660.4	1488.6	549.2	1248.7	1.3	3.6	47.8	52.7	0.09	0.305	Weak	KH
2	2828	357	418.6	1913.0	392.1	—	1.7	112.3	—	114.0	0.06	0.350	Weak	K
3	2836	607	1304.5	720.2	2049.4	—	1.2	15	51.2	67.4	0.05	0.278	Weak	H
4	2882	794	949.9	2715.5	1464.5	3745.2	0.5	3.9	16.1	20.6	0.01	0.301	Weak	KH
5	1850	1009	718.4	1844.9	1362.2	1440.8	0.5	1.6	38.9	82.9	0.03	0.280	Weak	KH
6	1423	210	1433.0	210.0	860.5	8367.3	19.4	43.1	49.6	112.4	0.28	0.260	Moderate	HA
7	1950	1328	205.8	750.3	52.6	66.8	2.9	11.8	68.2	82.9	1.33	0.195	Good	KH
8	1363	1586	1826.8	107.5	40.1	64.7	3.6	24.6	45.2	73.4	1.36	0.312	Good	AH
9	581	104	3455.5	1825.6	393.9	2030.4	0.6	2.0	89.2	91.8	0.23	0.276	Good	QH
10	9562	150	210.7	397.9	1721.4	228.2	0.7	12.8	55.2	68.7	0.07	0.256	Weak	AK
11	9740	209	1335.1	3372.5	924.2	1681.6	4.4	55.6	50.9	110.9	0.07	0.289	Weak	KH
12	1867	356	1721.4	118.2	611.2	4893.0	91.6	56.7	36.8	115.1	0.59	0.406	Moderate	HA