Geophysical characterization of the role of fault and fracture systems for recharging groundwater aquifers from surface water of Lake Nasser

Peer review under responsibility of National Research Institute of Astronomy and Geophysics.

Figures & data

Fig. 1 Location map of Lake Nasser showing the distributions of earthquake epicentral (blue dotes), locations of VES measured stations (red squares) and gravity profiles used for 2D modeling (black lines).

Table 1 List of earthquake events in/around Lake Nasser, collected from Aswan, Abu–Simbil, Marsa Alam seismic stations, Aswan seismic network and Egyptian National Seismic Network during 1982–2014.

Year	Mon.	Day	Hr.	Min.	Sec.	Lat. (N)	Long. (E)	ML
2013	2	25	13	57	56.23	23.5343	32.4945	1.91
2013	2	25	13	57	56.23	23.5343	32.4945	1.91
2014	4	5	22	12	47.15	22.749	31.4581	1.37
2014	8	11	23	15	31.87	22.7597	31.4841	1.41
2014	7	11	1	34	56.48	22.7326	31.4902	1.46
2014	7	6	22	3	24.55	22.7016	31.5282	1.55
2014	5	2	11	16	34.7	22.758	31.5145	1.58
2014	8	11	23	19	19.18	22.7504	31.4921	1.6
2014	4	6	3	12	45.32	22.3012	31.376	1.72
2014	5	30	15	23	51.47	22.7556	31.509	1.9
2014	5	21	4	38	35.27	22.8755	31.6273	1.95
2014	3	15	7	29	7.09	22.343	31.385	1.98
2014	4	6	3	18	36.66	22.2917	31.3816	2
2014	5	27	5	33	42.94	22.3997	31.3836	2.07
2014	7	24	8	37	13.71	22.2371	31.455	2.11
2014	1	28	2	29	8.33	22.7196	31.5358	2.13
2014	3	19	21	3	49.06	22.7285	31.519	2.18
2014	4	7	13	49	16.74	22.3682	31.3442	2.22
2014	4	7	4	17	38.44	22.3486	31.2924	2.35
2014	3	6	20	58	47.04	22.3323	31.3863	2.38
2014	3	8	22	31	16.83	22.5217	31.3646	2.45
2014	5	22	3	36	50.3	22.3632	31.4493	2.46
2014	3	5	13	19	8.95	22.4166	31.3929	2.48
2014	7	27	19	12	40	22.8372	31.7175	2.48
2014	5	23	6	3	58.82	22.7512	31.5155	2.56
2014	3	5	14	23	6.45	22.3578	31.3617	2.58
2014	5	13	17	3	46.56	22.7194	31.1256	2.64
2014	5	24	14	48	49.52	22.4688	31.6904	2.64
2014	4	18	2	19	20.7	22.4467	31.3932	2.67
2014	4	26	21	1	45.24	22.3917	31.4193	2.69
2014	1	31	7	48	4.6	22.7543	31.4988	2.72
2014	3	25	18	40	8.31	22.4774	31.406	2.82
2014	3	4	22	30	53.31	22.6053	31.3019	2.84
2014	3	4	14	16	49.9	22.7502	31.4919	2.96
2014	5	13	17	3	46.56	22.7194	31.1256	2.64
2014	4	7	4	17	38.44	22.3486	31.2924	2.35
2014	3	4	22	30	53.31	22.6053	31.3019	2.84
2014	4	7	13	49	16.74	22.3682	31.3442	2.22
2014	3	5	14	23	6.45	22.3578	31.3617	2.58
2014	3	8	22	31	16.83	22.5217	31.3646	2.45
2014	4	6	3	12	45.32	22.3012	31.376	1.72
2014	4	6	3	18	36.66	22.2917	31.3816	2
2014	5	27	5	33	42.94	22.3997	31.3836	2.07
2014	3	15	7	29	7.09	22.343	31.385	1.98
2014	3	6	20	58	47.04	22.3323	31.3863	2.38
2014	3	5	13	19	8.95	22.4166	31.3929	2.48
2014	4	18	2	19	20.7	22.4467	31.3932	2.67
2014	3	25	18	40	8.31	22.4774	31.406	2.82
2014	4	26	21	1	45.24	22.3917	31.4193	2.69
2014	5	22	3	36	50.3	22.3632	31.4493	2.46
2014	7	24	8	37	13.71	22.2371	31.455	2.11
2014	4	5	22	12	47.15	22.749	31.4581	1.37
2014	8	11	23	15	31.87	22.7597	31.4841	1.41
2014	7	11	1	34	56.48	22.7326	31.4902	1.46
2014	3	4	14	16	49.9	22.7502	31.4919	2.96
2014	8	11	23	19	19.18	22.7504	31.4921	1.6
2014	1	31	7	48	4.6	22.7543	31.4988	2.72
2014	5	30	15	23	51.47	22.7556	31.509	1.9
2014	5	2	11	16	34.7	22.758	31.5145	1.58
2014	5	23	6	3	58.82	22.7512	31.5155	2.56
2014	3	19	21	3	49.06	22.7285	31.519	2.18
2014	7	6	22	3	24.55	22.7016	31.5282	1.55
2014	1	28	2	29	8.33	22.7196	31.5358	2.13
2014	5	21	4	38	35.27	22.8755	31.6273	1.95
2014	5	24	14	48	49.52	22.4688	31.6904	2.64
2014	7	27	19	12	40	22.8372	31.7175	2.48

Fig. 2 The geologic map of the Lake Nasser area taken from CONOCO (1987).

Fig. 3 Distribution of Earthquake epicentral in/and around the Tushka New City site dropped on a topographic map (DEM from a satellite dataset). These data were collected from Aswan, Abu–Simbil, Marsa Alam seismic stations, Aswan seismic network and Egyptian National Seismic Network during 1982 to 2014.

Fig. 4 Cross section shows distributions of earthquake events in south-north direction crossing Tushka New city area.

Fig. 5 Cross section shows distributions of earthquake events in west-east direction crossing Tushka New city area.

Fig. 6 (a) Bouger anomaly map of the study area compiled by the Egyptian General Petroleum Corporation [E.G.P.C.] (1980). The white lines refer to the locations of profiles using for 2D modeling, and its derivative maps; (b) the first vertical gradient, (c) a horizontal gradient, and (d) a tilt gradient.

Fig. 7 Two-dimensional gravity models along four N–S and E-W profiles. Numbers in the cross-section denote model densities in kg/m³ and the locations of these profiles are shown in Fig. 6a.

Fig. 8 Interpreted geoelectrical cross section along profile (A-A′), the numbers inside the cross section refer to apparent resistivites in ohm m. The location of the profile is shown in Fig. 1.

Fig. 9 Interpreted geoelectrical cross section along profile (B-B′), the numbers inside the cross section refer to apparent resistivites in ohm m. The location of the profile is shown in Fig. 1.

Fig. 10 An integrated map of analytical signal of Bouguer anomaly map, distribution of Earthquake epicentral and faults deduced from geoelectrical profiles.