Test summary photographs for d_w/B ≤ 0 that show failure transitioning from capillarity limited air entry to the saturated zone for: (a)–(c) test 7 – d_w = 0 mm; (d)–(f) test 8 – d_w = −5 mm; and (g)–(i) test 9 – d_w =  −20 mm (note: no images available for test 10 due to camera malfunction)