The critical submergence for a group of multiple pipe intakes is predicted using a "superposition method" based on a potential flow solution. Experiments on groups of two, three, and four intakes were conducted. Experimental and theoretical results indicate that intakes in a group mutually influence the discharge into an individual intake. Therefore, the critical submergence for an intake in a group becomes larger than that for an isolated intake under identical flow conditions. The agreement between the theoretical and experimental results is found to be satisfactory.