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Dipole-Generated Unsaturated Flow in Gardner Soils

Dep. of Soils, Water and Agricultural Engineering, P.O. Box 34, Al-Khod 123, Sultan Qaboos Univ., Sultanate of Oman

View larger version (22K): [in this window] [in a new window]   Fig. 1. Impermeable cavity in a descending unsaturated flow field.

View larger version (14K): [in this window] [in a new window]   Fig. 2. (A) Vertical size of the cavity h, yB, and yC (curves 1–3) as functions of the infiltration rate/dipole ratio, a/q; (B) Kirchhoff potential at the trailing, B/q, and leading, C/q, edges (curves 1 and 2) as functions of a/q; (C) coordinates of the middle point of the cavity xM, yM and aspect ratio e (curves 1–3) as functions of a/q.

View larger version (25K): [in this window] [in a new window]   Fig. 3. Flow net for a = 0.1, q = 1. Curve 1 is the cavity contour ( = 0). Curves 2 through 8 are the equipotential lines for = 1, 0, 0.1, 0.08, 0.12, 0.16, and 0.2, respectively. Curves 9 through 11 represent the stream lines = 0.1, 0.2, and 0.3, respectively.