The location of the divide xd, where ^ is maximum, is obtained from xd$x xdxx
Note that xd could be larger than L or could be negative. In those cases, the divide does not exist, and the flow occurs in one direction throughout the aquifer.
Figure 9.4.6 shows radial flow in an unconfined aquifer with infiltration. If a cylinder has a radius r, the amount of water infiltrating into the cylinder is equal to Qin = Not2, and the amount of water flowing out of the cylinder is equal to 2ot • hqr = 2m"Qr. The continuity of flow requires that 2m"Qr = Not2, giving n N
Qr = Tr which can be written as yielding
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