1. Preamble, history. 2. Hydrobiology. 3. Substances endangering quality of waters, offending substances. 4. Municipal wastewater, sewage water, rain water, industrial water. 5. Rain water, pollution, acid rain. 6. Ground water, pollution, migration and self purification. 7. Ground water, protection of ground water, migration and self purification. 8. Surface water, self purification. 9. Oxygen regime in rivers, quality of water and classification of water. 10. Mathematical modeling of water quality in rivers and reservoirs. 11. Emergency state in water quality. Legislation, protection of water in Czech Republic.

1. Introduction. Entering essay. 2. Example 1 – Calculation of oxygen consumption of contaminated water. 3. Example 2 and 3 - Calculation of the equilibrium concentration of oxygen in the water. Determination of residual water pollution. 4. Example 4 – Calculation of the course of biochemical oxygen demand. 5. Example 5 - The course of oxygen concentration in the river below the waste water treatment plant. 6. Example 6 - Effect of artificial aeration to the course of oxygen concentration in the river. Control of solving essay. 7. Example 7 - Calculation of the total oxygen consumption by methods of Reed and Theriault. 8. Example 8 - Calculation of the total oxygen consumption by method of equations of the second order. Control of solving essay. 9. Example 9 - Determination of the critical values in the river. 10. Submitting and presentation of seminar papers. 11. Credit.