Small retention reservoirs

Reservoirs can be classified, among other criteria, according to size, however, the classification varies from country to country (e.g. CZ <2 000 000 m³ in parts smaller than 100 000 m³). For heavy rainfall risk management, small reservoirs on smaller water courses are of particular importance. They can protect objects in risk areas from the negative effects of floods after heavy rain and from the transported soil particles from erosion processes. The measure requires an occupation of (often agricultural) land. Therefore, settlement of property rights relations is necessary. Design documentation, planning permission, and realization might be demanding.