| 摘要 |
PROBLEM TO BE SOLVED: To provide a rainwater infiltration route specification method capable of specifying simply and surely infiltration routes of rainwater infiltrating from many spots. SOLUTION: This method for specifying the infiltration routes of the rainwater when the rainwater infiltrates and leaks from one or plural spots 1, 2, 3 of a concave structure is characterized by injecting coloring examination liquid into the one or plural spots. Preferably, the examination liquid is deposited as colored crystallite on the water leakage spots. The examination liquid includes a calcium salt and an alcohol.
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