Communal lecture for 4-courseSubject: Sources of drinking water

By surface include:

constantfor judging the power of the river passed runoff

ponds:  If for drinking purposes - that ponds

should be higher populated areas, if for sporting purposes inside settlements. On the site of the former cemeteries,

burial grounds and landfill construction of ponds is not allowed.

channels

   Water rows of seats at the expense of the channels through which supplied water from rivers in the dry areas. In the channels - the development of abundant aquatic vegetation

Groundwater.     Groundwater is divided into

three groups:

subterranean waters Water that accumulates in the filtering process on the ground from the ground

waterproof seam is called groundwater, or discharge. Therefore, in ground water wells

is set at the same level as that in the subterranean layer. Groundwater depth

varies from 2-3 m to a few tens of meters.

perched     This accumulation of water under the earth above the water table. It is

formed on the surface of water-resistant or impermeable rocks

included in the form of a lens in the thickness of the water-permeable layer,

called the vadose.Diet is unstable, highly mineralized and

easily contaminate-is. Perched less suitable as a source of water supply.

Springs. Springs and keys are formed by the natural outlet of the underground aquifer to

the surface. This clean water, no wonder people say is pure as spring water. Coastal

water infiltration. If the river banks are made of permeable rock filter, it is advisable to the

coastal wells from which you can pick up water. Aqueducts some cities for decades

feed a water infiltration (g Urgench).

Selecting a water source. Standard 951 - 2000 g - "Sources of centralized economic - drinking

water supply. Rules for the selection and evaluation of quality. "Selecting a water source

- one of the critical and often occur in health activities tasks.

Under the SBV source of drinking water is a specially selected ter-ritory in which We establish with specially-modes of economic and other figure-of for the protection of the source and water supply facilities from contamination.

To establish the appropriate size    2 - 3rd zone and on an exceptional basis with the appropriate justification and in consultation organizations, sizes 2 - On the third zone can be saved, provided that special measures will ensure consistent quality of drinking water provided for guests 950: 2000 "Water drinking. Hygienic requirements and quality control. "

thank you for your attention