Geografie 2003, 108, 36-48

Changes and Particularities of Water Condition of the Ostravice River

Vladislav Kříž

Katedra fyzické geografie a geoekologie, Přírodovědecká fakulta Ostravské univerzity, Chittussiho 10, 710 00 Ostrava - Slezská Ostrava, Czechia

Last year, urbanization and industrialization processes in the Ostrava region urgently brought in the necessity to build waterworks in the catchment area of the Ostravice River. From the head of the catchment downward, significant changes of dam streams occur; downstream, the influence of the industrial area also plays its role. At present, the daily, monthly and yearly flows are changing within the frame of flow regime control. The dam runoff control transfers a certain part of the runoff into the technological water circuit, which overpowered the natural rhythm of the daily flow in the snow melt period and changed the occurrence and duration of low-regime periods and floods. The impact on the temperature and ice conditions of the stream is effective in sections of dozens of kilometres long. Apart from the impact of dams, the lower course of the Ostravice is also affected by tempered effluent water. The extent of the hydrological regime changes alters the ecological characteristics of the river.


Příspěvek byl zpracován v rámci grantu GA ČR č. 205/02/1187.