Assessing groundwater potential in Foumban and implication on urban planning in the context of sustainable development

Figures & data

Figure 1. The study area, MoF, presented by its drainage map.

Figure 2. The geomorphological map of MoF.

Figure 3. The geological map of MoF.

Figure 4. Flowchart for GWP investigation.

Table 1. Constant rating scale of Saaty’s AHP.

Less influential				Equally influential	More influential
Extreme importance	Very strong importance	Strong importance	Moderate importance	Equal importance	Moderate importance	Strong importance	Very strong importance	Extreme importance
1/9	1/7	1/5	1/3	1	3	5	7	9

Table 2. The RI ratio of the distinct values of n.

n	1	2	3	4	5	6	7	8	9	10
RI	0.00	0.00	0.58	0.89	1.12	1.25	1.32	1.40	1.45	1.49

Table 3. Normalised weights of different factors for pairwise comparison.

Factors	Slope	DD	LULC	LD	TWI	Rainfall	Normalised weight
Slope	1						0.40816327
Drainage density	3.50	1					0.20408163
LULC	2.30	2.00	1				0.13605442
Lineament density	1.75	1.50	1.25	1			0.10204082
TWI	1.40	1.20	1.00	0.80	1		0.08163265
Rainfall	1.00	0.86	0.71	0.57	0.43	1	0.06802721
Total							1.00000000

Table 4. The six parameters used for GWP assessment ranked in descending order.

Parameters	Weight	Rank	Area (km2)	%
Slope	0.4082	1^st
0–5.0		5	67.48	11.71
5.0–10.0		4	137.68	23.89
10.0–15.0		3	266.48	46.24
15.0–25.0		2	71.75	12.45
25.0–71.0		1	36.25	6.29
Drainage density	0.2041	2^nd
Very high		1	49.55	8.60
High		2	130.95	22.72
Moderate		3	169.10	29.34
Low		4	155.20	26.93
Very low		5	71.49	12.41
LULC	0.1361	3^rd
Agriland		3	1.66	0.29
Barren land		1	340.67	59.11
Vegetation cover		4	186.19	32.31
Built area		2	42.71	7.41
Water body		5	7.26	1.23
Lineament density	0.1020	4^th
Very high		5	13.96	2.42
High		4	74.70	12.96
Moderate		3	77.87	13.51
Low		2	80.36	13.94
Very low		1	328.49	57.00
TWI	0.0816	5^th
1.70–5.48		1	218.99	38.00
5.48–7.50		2	184.41	32.00
7.50–10.93		3	109.50	19.00
10.93–24.13		4	63.39	11.00
Rainfall	0.0551	6^th
1900–1950		3	110.82	19.23
1850–1900		2	281.68	48.88
1800–1850		1	177.26	30.76

Figure 5. Distribution and extension of the slope classes of the study area.

Figure 6. Distribution and extension of the drainage classes of the study area.

Figure 7. Distribution and extension of the LULC classes of the study area.

Figure 8. Distribution and extension of the lineament density classes of the study area.

Figure 9. Distribution and extension of the topographic wetness index of the study area.

Figure 10. Distribution and extension of the rainfall classes of the study area.

Figure 11. Thematic map of the groundwater potential zones distribution in MoF.