The results are presented for flow-to-closed drains from domains of various dimensions and hydraulic properties, including layered and anisotropic media. Accurate answers are obtained for flows and heads for these domains, given certain boundary conditions, by means of numerical anlaysis based on the potential theory and the concept of free surface seepage. These results, unlike those obtained using the D-F equation, account explicitly for vertical flow. The results are then compared with numerical results obtained from simulations based on the D-F equation with the flow to the drains being calculated using both the reduced saturated depth method of Hooghoudt (1940) and the head difference formula of Herbert (1970). The study shows that within certain limitations the methods give results of acceptable accuracy. The results show that flows can be accurately calculated and also that the single depth integrated potential midway between the drains is a good assessment of the height of the water table.
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