|
5D + E - Risk communication + From risk mgnt to sust. mgnt? (MOP/192) Sustainable management of water in headwater lakes and streams. Banas, Pawel1, Zobel, Alicja2, Bialonska, Dobroslawa3, 1 Institute of Geography, Jagiellonian University, Krakow, Malopolska, Poland2 Department of Chemistry, Trant Univeristy, Peterborough, Ontario, Canada3 Institute of Environmental Sciences, Jagiellonian Univeristy, Krakow, Malopolska, Poland ABSTRACT- The water management by humans should have enough water for preservation of water reservoirs, rivers and lakes together with surrounding area to allow not economical human needs (e.g. fishing, swimming, boating). But in practice there are amounts of water called Qn having different definitions depending on purpose of usage of Qn , and seeing a man as part of the system, and how the author calculates it during e.g. drought. But for survival of a stream, man should make requirements of not overusing it except of extreme (natural) condtions. The level of water in headwater lakes are changing during the year and due to human and sometimes animal activity. Such lake is e.g. Clear Lake in Ontario, Canada, with protected 1500 ha of the 400-year-old hemlock oldgrowth. Our research on the water of this lake was connencted with two macrophytes Lobelia and Eriacolon which had different cover of water depending on year and beaver activity and thus various UV protection. We found changes in plant structure using light and electron microscope as well as phytochemicals absorbing different UV irradiation when the water level was very low. Experimants in the containers in laboratory showed similar changes under controlled conditions of light, temperature and pH. Key words: water habitat condition, water resources management, instream flow alteration, Instream Flow Incremental Methodology |
