Human impacts; methods; mean man-induced (anthropogenical) specific runoff; Upper Oder basin.

The Oder Basin down to the Koźle water-gauge is an example of an area where both slightly changed elementary basins (Sumina-Nędza I, Lomná-Jablunkov I) and basins under significant human impact occur. Water intake is larger in Ostravice-Sviadnov II and Kłodnica-Lenartowice II basins; water inflow is larger in Odra-Bohumín II and Klodnica-Gliwice I basins. The method applied to determine the man-induced discharge examines the total human influence and does notshow how much water was deliwered to or taken from the basin in a particular year. This may be determined by the balance method. In this very case, howerer, due to lack of certain data (intake of industrial water, drinking water for agriculture and irrigation, etc.) the balance method can often not be used for calculations of the man-induced discharge.

The Oder Basin down to the Koźle water-gauge is an example of an area where both slightly changed elementary basins (Sumina-Nędza I, Lomná-Jablunkov I) and basins under significant human impact occur. Water intake is larger in Ostravice-Sviadnov II and Kłodnica-Lenartowice II basins; water inflow is larger in Odra-Bohumín II and Kłodnica-Gliwice I basins. The method applied to determine the man-induced discharge examines the total human influence and does notshow how much water was deliwered to or taken from the basin in a particular year. This may be determined by the balance method. In this very case, howerer, due to lack of certain data (intake of industrial water, drinking water for agriculture and irrigation, etc.) the balance method can often not be used for calculations of the man-induced discharge.