Water deserves our attention. Many years ago, we could rely on the natural water cycle. These days, it seems to be completely impossible and it is necessary to hurry with help. The land on which the Ice Sports Complex is growing requires investment, which will solve more or less complicated local conditions. The massive installation of mammoth infiltration galleries necessarily and logically precedes the next construction steps of the project. It is necessary to ensure that the land is under control in terms of water management. On one hand in terms of protecting the building from flood rains and either for irrigation purposes in the event of a dry weather return. Water, its controlled accumulation and subsequent reasonable distribution are an issue that is generously solved on the grounds of the Ke Kateřinkám Primary School so that there are no disproportionate risks from an operational point of view, either from a shortage or excess of life-giving fluid.