Investigation of the Aquifer Protective Capacity and Groundwater Quality around Some Open Dumpsites in Sapele Delta State, Nigeria

Table 2

Geoelectric parameter and lithologic delineation the VES at Sapele.

S. no.	Layers	Resistivity	Thickness	Depth to bottom	Lithology	Curves
VES 1	1	41.5	1.5	1.5	Topsoil	HKH; ρ1 > ρ2 < ρ3 > ρ4 < ρ5
	2	17.1	4.4	5.9	Clay
	3	142.7	13.8	19.6	Clayey sand
	4	13.4	29.1	48.7	Clay
	5	181.7	Undetermined	Undetermined	Fine to medium sand
VES 2	1	18.0	1.0	1.0	Topsoil	KHK; ρ1 < ρ2 > ρ3 < ρ4 > ρ5
	2	75.8	3.8	4.8	Clayey sand
	3	14.7	10.2	14.9	Clay
	4	293.5	31.1	46.0	Fine to medium sand
	5	47.2	Undetermined	Undetermined	Clay sand
VES 3	1	26.0	1.0	1.0	Topsoil	KHA; ρ1 < ρ2 > ρ3 < ρ4 < ρ5
	2	62.5	6.0	7.0	Clayey sand
	3	25.4	16.9	23.9	Clay
	4	70.8	16.7	40.6	Clay
	5	115.1	Undetermined	Undetermined	Fine to medium sand
VES 4	1	65.1	1.0	1.0	Topsoil	HAK; ρ1 > ρ2 < ρ3 < ρ4 > ρ5
	2	49.2	6.0	7.0	Clayey sand
	3	111.5	15.4	22.4	Fine to medium sand
	4	124.8	15.6	38.1	Fine to medium sand
	5	71.8	Undetermined	Undetermined	Clay
VES 5	1	45.6	1.0	1.0	Topsoil	KHA; ρ1 < ρ2 > ρ3 < ρ4 < ρ5
	2	78.5	7.0	8.0	Clayey sand
	3	35	16.2	24.1	Clay
	4	83.3	19.0	43.1	Clay
	5	113.9	Undetermined	Undetermined	Fine to medium sand
VES 6	1	41.9	1.0	1.o	Topsoil	KHA; ρ1 < ρ2 > ρ3 < ρ4 < ρ5
	2	81.1	7.3	8.3	Clayey sand
	3	37.6	16.1	24.4	Clay
	4	89.5	18.8	43.2	Clay
	5	126.3	Undetermined	Undetermined	Fine to medium sand
VES 7	1	71.0	0.7	0.7	Topsoil	AAA; ρ1 < ρ2 < ρ3 < ρ4 < ρ5
	2	235.3	5.8	6.4	Clay
	3	127.1	15.6	22.0	Clay
	4	122.3	20.9	42.8	Fine to medium sand
	5	522.5	Undetermined	Undetermined	Medium sand
VES 8	1	207	1	1	Topsoil	KHA; ρ1 < ρ2 > ρ3 < ρ4 < ρ5
	2	374.3	7.3	8.2	Medium
	3	175.8	17.8	26.0	Fine to medium sand
	4	349.7	19.7	45.7	Fine to medium
	5	624.9	Undetermined	Undetermined	Medium sand
VES 9	1	312.1	1.1	1.1	Topsoil	HAA; ρ1 > ρ2 < ρ3 < ρ4 < ρ5
	2	134.2	5.2	6.3	Fine to medium sand
	3	349.9	11.7	18.1	Fine to medium sand
	4	711.6	17.2	35.2	Medium sand
	5	919.2	Undetermined	Undetermined	Medium sand