Modern Recharge in a Transboundary Groundwater Basin Deduced from Hydrochemical and Isotopic Investigations: Al Buraimi, Oman

Table 1

Field parameters, physical characteristics, and isotopic composition of groundwater samples.

No.	Name	Depth to water (m)	Lithology	EC (μS/cm)	TDS (mg/l)	pH	δ ^18O (per mil)	δ ^2H (per mil)
1	B-9	9.8	Alluvium	1610	1046	7.27	−2.207	−5.498
2	WZDB1	34.12	Tertiary	1403	911	7.88	−1.075	−1.135
3	A-5	29.92	Hawasina	1059	686	7.99	−2.133	−5.747
4	WSKD1	23.81	Ophiolite	1234	818	7.88	−1.484	−2.472
5	ZG-3	27.14	Ophiolite	7017	4560	7.52	−1.024	−2.540
6	S-5	37.7	Hawasina	841	546	8.11	−1.359	−2.013
7	BU-EH11	33.25	Hawasina	988	641	8.85	−1.931	−5.241
8	S-28	46.75	Alluvium	708	460	8.4	−1.457	−2.374
9	S-6	43.7	Alluvium	1033	672	8.12	−1.484	−1.410
10	BU-EH 06	41.5	Alluvium	522	340	8.37	−1.247	−1.549
11	Davoodi falaj	—	Ophiolite	628	408	8.4	−1.397	−3.240
12	Mahdah falaj (Aini)	—	Ophiolite	599	390	8.39	−0.260	3.540
13	Al Khadra falaj	—	Ophiolite	748	487	8.87	−0.318	3.691
14	Wadi Sharm falaj	—	Ophiolite	841	546	8.23	−0.360	3.267
15	P-18	32.4	Alluvium	660	429	8.61	−0.017	7.739
16	Juwaif falaj	—	Ophiolite	714	464	8.45	−0.596	3.172
17	Juwaif well	>100	Ophiolite	2770	1809	11.8	−1.033	−0.061
18	Khatwa falaj	—	Ophiolite	624	406	8.6	0.918	7.159
19	Mehasen farm	>100	Ophiolite	605	395	7.91	−1.933	−4.985
20	S-25	25.78	Alluvium	749	486	8.65	−0.819	−0.531
21	P-8	35	Alluvium	639	415	8.81	−1.436	−3.279
22	WM-4	46.85	Alluvium	1555	1011	7.77	−0.933	−2.631
23	WM-3	46.75	Alluvium	1368	889	7.7	−0.965	−2.673
24	WM-6	47.45	Alluvium	1458	946	8.06	−1.060	−2.979
25	EW-4	25.35	Alluvium	662	430	8.23	−0.745	−1.774
26	EW-14	36.7	Alluvium	838	545	8.25	−1.773	−6.526
27	WS-15	38.4	Alluvium	889	577	8.24	−1.858	−6.498
28	P-6	43.51	Alluvium	668	433	8.72	−0.731	0.282
29	EW-10	41.48	Alluvium	595	387	8.61	−1.291	−2.398
30	E-5	26.35	Alluvium	2630	1710	7.72	−1.805	−3.182
31	EW-5	28.12	Alluvium	704	456	8.56	−1.504	0.425
32	WS-12	22.15	Alluvium	1368	889	8.13	−1.638	−5.307
33	WS-11	23.15	Alluvium	999	649	8.01	−1.543	−4.635
34	E-4	28.9	Alluvium	905	588	8.39	−1.608	−4.477
35	P-17	27.42	Alluvium	617	401	7.69	−1.745	−4.684
36	EW-3	19.98	Alluvium	1077	702	8.2	−1.289	−3.635
37	E-1	22.4	Alluvium	734	476	8.25	−1.551	−4.243
38	EW-2	25.5	Alluvium	978	634	8.19	−2.415	−9.344
39	EW-9	36.12	Alluvium	1147	745	8.02	−2.917	−11.299
40	P-7	41.45	Alluvium	899	584	8.61	−1.242	−1.073
41	P-1	42.7	Alluvium	4497	15917	6.95	−1.805	−8.589
42	EW-21	23.95	Alluvium	1567	1015	8.81	−1.416	−5.261
43	MF-1	43.85	Alluvium	1662	1082	7.96	−2.119	−8.415
44	S-15	42.55	Alluvium	1068	685	8.2	−2.192	−8.193
45	A-17	34.42	Alluvium	1477	962	8.25	−1.573	−4.563
46	SMD-1	32	Alluvium	15470	10054	7.33	−0.664	−2.159
47	SMD-5	30.95	Alluvium	1540	1000	7.94	−1.408	−3.162
48	AJ3-AJ3A	32.13	Tertiary	1973	1283	10.02	−2.206	−10.849
49	Farm 1	33.8	Alluvium	1797	1172	8.23	−1.465	−6.783
50	Farm 2 well 1	Deep	Tertiary	13570	8900	7.72	−2.212	−14.327
51	Farm 2 well 2	Shallow	Alluvium	3219	2063	8.11	−1.407	−4.925
52	Farm 3	Deep	Ophiolite	4760	3094	7.74	−0.919	−0.088
53	Farm 4	Deep	Ophiolite	2775	1803	9.48	−0.226	−0.371
54	Farm 5	—	Hawasina	2087	1343	8.16	−0.951	0.525