1. OLZA (Olše) The river that flows through Třinec and its pollution

2. Our project activities on WATER POLLUTION in Třinec We tried to find out as much as possible about water pollution... We created some crosswords for our friends linked with the environment. We visited our local sewage disposal plant. We took some pictures of our rivers and brooks. We made a presentation on this topic - we used the data we found in the library, on the internet, in our textbooks, in magazines, in newspapers.

3. How does water pollution occur? We found out that water pollution results mainly from: harmful industrial processes and households pesticides and other chemicals used in agriculture waste disposal sites substandard sewage treatment plants...

4. Water sources in Třinec the river Olza the brook Křivec the river Tyrka the brook Lištnice

6. How long is the Olza? 16 km in Poland, 46 km in the Czech Republic 24 km border between Poland and the Czech Republic

7. The river flows through several large cities: Jablunkov, Třinec, Český Těšín, Karviná

8. The river springs in Poland near the village Istebna In the photos you can see the river in winter (February 2013)

9. The Olza is the right tributary of the Oder River.

10. Olza inspired many artists, writers, singers...

12. In the past a lot of people went swimming there. Nowadays only those who are “brave enough “, because when you go swimming there you can get an allergy or red skin or a rash... Even some dogs have troubles with their hair after having a bath in the river.

13. !!! Unfortunately, before 1989 we did not solve the water pollution

14. Now we know that if we want to have cleaner waterways, some measures must be taken. First, discharges to water from industrial processes should be controlled and the number of sewage treatment plants should be increased.

15. We should also find technologies for saving water and reduce the amount of chemicals.

16. In Třinec there are two main sources of water pollution: 1) industrial production

17. 2) communal waste ( blocked sumps and cesspools )( inconvenient sewerage )

18. Today these both sources are under the strict control.

19. What measures were taken?

20. A lot of money was invested into the improvement of the situation. Two large projects were carried out: 1) sewage disposal plant modernization (Třinec – Konská) 2,2 mil eur 2) revitalization of the border river Olza (8 towns and villages were included) 57 mil eur

21. Revitalization of the border river Olza

22. new sewerage - 100 km 5 new sewage disposal plants preventive measures against floods clean water in the river comeback of some species: The results of the Revitalization of the river Olza

23. Our visit to sewage disposal plant in TŘINEC-KONSKÁ The sewage from our town and its surrroundings is cleaned here. We watched how it worked.

24. Our meeting with the director of our local sewage disposal plant.

25. The parts of the cleaning process.

26. The laboratory- the samples of water are regularly taken and checked here.

27. In case of an ecological disaster we have an immersion baffle (wall) – a floating device used to contain oil on a body of water.

28. The river near the sewage disposal plant is already full of life, here is the evidence.

30. Source: http://www.risy.cz/Files/Images/beskydy/zajimavosti/reky_2.jpg http://i.lidovky.cz/12/082/lngal/PTA4529b6_shutterstock_78242434.jpg http://www.msslezska.estranky.cz/img/mid/275/trinecke-zelezarny.jpg http://nd05.jxs.cz/976/287/4420d197c2_84678275_o2.jpg http://www.chytej.cz/foto/clanky/2011/1078/Pstruh%20obecn%C3%BD%201.jpg http://znamky.szesro.cz/text/K%C5%BDP/Druhy%20tekouc%C3%ADch%20vod/rak%20%C5%99%C3 %AD%C4%8Dn%C3%AD.jpg http://-content/uploads/2011/12/breznacky1.jpg Photos: Mordáč Stanislav, Nožková Lucie http://upload.wikimedia.org/wikipedia/commons/5/50/Trinec_orlice.gif