1. Presentation of practical lessons on environmental sanitation for 4th year 7 - term

2. 1- Theme Hygienic evaluation of the quality of drinking water. Methods of selecting water sources for drinking water supply. hygiene requirements State Standard 951 - 2000.

3. Purpose of the lesson - Learn the basic legal documents regulating the activities of physicians in the communal hygiene in the implementation of CSS for the water supply. - To teach students to use in the implementation of legislative instruments for water CSS - To teach students to competently carry out sanitary-hygienic assessment of the quality of drinking water.

4. continue - Understand the purpose of water supply source. - To master the technique of choice water source. - Learn to evaluate sources of water supply - Justify the need for knowledge of basic legal documents in preparation of a qualified physician - Promote the development of students' thinking in the study of topics

5. Student should know: Values and legal rules governing the relationship of man to man, society and the environment. Know the criteria for assessing the quality of drinking water. Features of the organization and conduct of sanitary and epidemiological measures to mitigate the adverse effects of the risk factors of public health and the environment.

6. The student should be able to: Values and legal rules governing the relationship of man to man, society and the environment. Know the criteria of ecological and hygienic assessment of environmental objects. Features of the organization and conduct of sanitary and epidemiological measures to mitigate the adverse effects of the risk factors of public health and the environment Selects the source of centralized drinking water supply. Perform visual, laboratory instrumentation, computational methods for determining the hygienic assessment of environmental factors. Conduct sanitary inspection of supervision and make the appropriate accounting and reporting documentation. Perform visual, laboratory instrumentation, computational methods for determining the hygienic assessment of environmental factors.

7. Educational aim questions: If the result of parasitological and radiological examinations will be negatively water can be used for drinking water supply of the population. methods of laboratory analysis of water Group of indicators defining water qualityOrganoleptic characteristics of drinking waterOrganoleptic characteristics normalized by the intensity of perceptionOrganoleptic characteristics depend on the availability of water chemicals Quality of water from the tap selected headroom well be compared with the standards set out in the SST 950-2000.

8. continue Water quality organoleptic properties relevant regulations. Water quality meets the requirements of toxicological indicators. Water quality given microbiological indicators (TBC and if the index) comply with the requirements of SST 950-2000. Must be supplemented by the results of analyzes of water parasitological studies in accordance with SST 950-2000. Must be supplemented by the results of water analyzes of radiological examinations in accordance with SST.

9. СОДЕРЖАНИЕ ЗАНЯТИЕ So what water can be considered "good"? Potable water, in principle, if it satisfies the following requirements: If it does not contain substances, including natural origin, in such quantities that may be harmful to health; If it does not contain too many pathogens, ie, if it is safe in epidemiological terms; if it is transparent and has no unpleasant taste or aftertaste.

10. Epidemiological indicators safety of drinking water: The degree of bacterial contamination of water is determined by the total number of bacteria in 1 cm3 of water and the largest coli-index, which reflects the number of indicator coliform bacteria in 1 liter of water. Koli-titer - the volume of water which contains one E. coli, should be at least 300. In accordance with SanRandN 2.1.4.1074-01 total number of bacteria in 1 cm3 of undiluted water must be no more than 100, and if index - no more 3.

11. Organoleptic indicators pitevoy water Chromaticity. Water in the normal state is a colorless liquid; color, namely, a bluish tint, it typically acquires only provided that the thickness is not less than 2m Chemical indicators of drinking water without harm * Aluminium - 0,2mg / l * Beryllium - 0.0002 mg / L Sodium- * 45 mg / l Fluoro * 0.7 mg / l

12. continue Chemicals affecting the organoleptic properties of water: Iron General stiffness Mn Sulfates, chlorides Indicators definable attraction sokrashennom water analysis:? * Total microbial count? If index * The smell, the taste Color Turbidity

13. Selecting a water source - one of the critical and often occur in health activities tasks. It is manufactured in accordance with the requirements of GOST 951 - 2000 "Selecting sources of centralized drinking water supply." General plan for water supply

14. To groundwater include: 1. ground water, which are characterized by the presence of the bed and the lack of waterproof roof; 2. interstratal water, which are water-resistant roof.

15. To select the source of water supply in the first place need to figure out all of the local water resources and to determine whether one or more water sources to satisfy the amount of water consumption rates populated areas as a whole, and to consider the prospects for population growth and the development of improvement.

16. In artesian aquifer has nutritional pressure and discharge of groundwater is formed from a combination of many processes, which are divided into 2 groups: 1. Chemically-solute sorption exchange sedimentation, chemical phenomenon.. 2. The mechanical, physical and chemical mobility are caused by groundwater, absorption and release of gases and others.

17. Depending on the nature of landforms distinguish Lowland riversmountain rivers.

18. Suitability source for drinking water supply of the population is based on:

19. Composition of fresh water underground and surface water sources must meet the following requirements: Solids not more than 1000 mg / l; in agreement with the sanitary epidemiological surveillance allowed up to 1500 m / l The chloride content of not more than 250 mg / l; in agreement with the sanitary epidemiological surveillance allowed up to 350 m / l; Sulfate content is not more than 400 mg / l; in agreement with the sanitary epidemiological surveillance allowed up to 500 m / l; Total hardness less than 7 mg-eq / l; in agreement with the sanitary epidemiological surveillance allowed up to 10 mg-eq / l;

20. The name of indicators Water quality by class 123 Turbidity mg / l maximum 1,5 10,0 Chromaticity, degrees not more 20 30 Hydrogen index (pH) 6-9 Iron ( ғ e), mg / l, no more 0,35.010,0 Manganese mg / l maximum 0,11,02,0 Hydrogen sulphide mg / l, more --3.0 Fluorine mg / l, more 0,7 5,0 Permanganate oxidizability, 2,05.010,0 number index 31001000 Water quality of underground water sources by class

21. The name of indicatorsWater quality by class 123 Turbidity mg / l, no more 20150010000 Chromaticity, degrees not more 3050100 Hydrogen index (pH) 6,5-8,5 Iron (Fe), mg / l, no more 0,31.03,0 manganese 0,11,02,0 The odor scores less than 234 fluorine 0,7 permanganate oxidizability 7,015.020,0 BOD in mg O2 / l, not more 3,05,07,0 BOD in mg O2 / l, not more The number of Escherichia coli lactose in 1 liter (PBL), not more than 10001000050000 Water quality of surface water sources by class

22. Underground water sources Class 1 water quality on all parameters meet the requirements O'z Dst «Drinking water hygiene requirements and quality control" Grade 2 - water quality is the deviation of individual indicators of the above standard, which can be removed by aeration, filtration, disinfection, or sources with unstable water quality, which is reflected in the seasonal variation of dry residue in the range allowed for drinking water, and requires disinfection. 3 class. Raising the quality of the water requirements of the above standard techniques require additional processing provided in 2klasse and methods such as filtration with a delay to the preliminary use of various reagents and others.

23. Surface water sources Class 1 - to produce water that meets the requirements O'z Dst «Drinking water hygiene requirements and quality control", requires obezzararazhivanie, filtration, coagulation with or without him. 2.- class for water corresponding to the above standard, requires coagulation, sedimentation, filtration, disinfection; in the presence of fitoplanktona- microfiltration 3 class. Raising the quality of the water requirements of the above standards on drinking water possible using processing techniques specified in the 2nd class, with additional metodov- additional clarification stage, oxidation and sorption methods, and more effective methods of disinfection and others. Surface water sources

24. Sources of centralized drinking water supply in accordance with their health safety taken in the following order: Interstratal pressure water; Interstratal non-pressure water ; Groundwater artificially replenished water underflow; Surface water (rivers, reservoirs, lakes, canals )

25. Conclusion on the suitability of the water source must contain the following information: On the subject of water supply and sanitary characterization planned to use the water source The quality of the water supply source and forecast its condition at the settlement period On measures for the organization of sanitary protection zone and the planned water treatment water source in order to bring the quality water requirements for drinking water

26. Rules for the selection and evaluation of the suitability of the water source: Water quality analysis When surface water sources hydrogeological data Minimum and average water consumption, according to their expected taps Domestic, industrial and agricultural pollution

27. New educational technology used To engage in The method of "Round Table" Divide the group into small groups of 2-3 people, each MG offer sheet with the issue and ask for 1-2 minutes, write the answer to the question, and then pass another piece of MG and MG to take from the other, and so the next question Thus, if arrange 5 mg (2 students for 1 table), the teacher hands out of 5 questions, and ultimately each piece should be 5 replies. After 12 minutes, the teacher collects all sheets, analyzes the quality of the submitted answers aloud and exposes evaluation of each MG whose 5 correct answers, "choir" 4otvetov "Satisfactory" 3 responses to "unsatisfactory" for at least 2 correct answers. Version of the proposed questions: What are the requirements for sanitary water supply sources? Importance to the organization of sanitary protection zone of water supply sources. How to define the boundaries of strict regime belt groundwater sources? Which mode is established in the territory of one belt SBV underground sources? How to settle the border zone restrictions underground sources?

28. 28 "Fish skeleton" Planning a choice of open source water reservoir corresponding to class 2 for water supply … Water quality does not meet the SST 950-2011 A Organization of the SOA To establish the boundaries of the SOA necessary sanitary topographical survey To improve the quality of water taken coagulation, filtration and disinfection Development of preventive measures

29. 29 The method of "clusters" Factors causing contamination of drinking water Economic - fecal sewage Cultural Manufacturing water foodstuffs vegetables textile polyme rs Light industry industry maintenance bath laundri es hairdresser Methods of improving water quality filtering chlorination settling

30. New educational technology used in the lesson topic reservoirs pond Ground waters Rivers Interstratal pressure water Interstratal non- pressure water

31. test questions What are the two forms of the SS. What are the standards for water consumption of drinking water per person. Justification standards to ensure the safety of drinking water in relation to the epidemic. Justification of rules to ensure the harmlessness of the chemical composition of drinking water.

32. continue What are the requirements to the device wells, spring catchments? Sanitary requirements for water quality in the local water supply. What you know water sources? What are the requirements for sanitary water supply sources? Importance to the organization of sanitary protection zone of water supply sources. Composition waterworks river running water.

33. "Main: 1. "Health" under the guidance of prof. Demidenko NM T. 2003 2. Guide to laboratory work on communal hygiene Goncharuk EI Moscow 1990 3. Sh.T.Otaboev, T.I.Iskandarov, G.T.Iskandarova "Kommunal hygiene" Tashkent 2010 th. 4 "Kommunal gigienadan Amal mashgulotlar Uchun ukuv kullanma. "Edited by Academician Iskandarova TI T. 2006y 5. "Communal Hygiene" E.I.Goncharuk Kiev in 2007 I, II part References

34. - GT Iskandarova "Regional san. gig. problems of protection of water sources "water inpatient population of Uzbekistan. T. 2001. - Health rules and regulations of planning and building of settlements of the Republic of Uzbekistan 0003-93 - Sanitary norms of admissible levels of electromagnetic fields of radio frequencies 0064-96 - Sanitary rules of design and maintenance of cemeteries 0086-99 - Health rules and regulations and the optimum allowable building density residential areas of cities of Uzbekistan 0144-03 Further Reading

35. continue Health rules and regulations design of residential houses in the climatic conditions of Uzbekistan 0146-04 - Health rules and regulations setting up and maintaining public toilets 0151-04 - Hygiene requirements for institutions, organizations, companies and individuals involved in the disinfection activities 0177-04 - Health rules and regulations for the use of mobile phones 0189-05 - Lecture materials.

36. O'z.Res.SSV veb-sayt WWW.minzdrav.uz TTA sayti – WWW.tma.uz. htt://web.tma TMA Wi-Fizone ZiyONet Internet sites