Application of Electrical Resistivity Tomography Technique for Characterizing Leakage Problem in Abu Baara Earth Dam, Syria

Table 2

Full description of the detected subsurface features derived from the ERT-P1 survey profile at Abu Baara earth dam.

	ERT profile length: 715 m	Detected layers thickness (m)	Lithological description	Bed dip	Resistivity values (·m)	Abnormal features		Possibility of seepage
						Kind of anomaly	Location on ERT section
Block (I)	0–300 m	L1: 1–5	Alluvium, clays, sands, and gravels	5–7° toward the valley	50–150	—	—	—
		L2: 40–45	Limestones and dolomites rocks		>1200; 50–150	Cavity; Void filled by alluvium	60–90 m; 230–250 m	Possible seepage
Block (II)	300–500 m	L: 45	Alluvium, clays, sands, and gravels	0°	50–150	Subsiding structure (main valley)	300–500 m	Seepage through both edges
					5–15	Vertical clayey zone	300–320 m	Possible seepage
Block (III)	500–715 m	L1: 1–25	Alluvium, clays, sands, and gravels	20° toward the valley	50–150	—	—	—
		L2: 30–45	Limestones and dolomites rocks		300–1000	Discontinuity feature	650 m	Possible seepage