«Problematic issues. Water is the most important factor of the environment "

lector – prof. Iskandarova G.Т.

Top earth looks blue planet72% of which is covered by water. The amount of water on the Earth's surface is1,350,000,000 km3, of which:97% - salty water (seas and oceans);3% - the fresh water, which make up three-quarters of the glaciers. The population is mainly supplied with fresh water. Consequently, only 0.3% of water resources of the Earth is actually fit for consumption

Potable water - water in its natural state or after processing (cleaning, disinfection, adding of missing substances) responsible for the quality of the regulatory provisions and intended for drinking and household needs person, or for the production of food products.

Having no nutritional value, water provides all the vital processes in the body:

Almost 70% of human body weight is water.Daily consumption of water with food and drinks in normal conditions is equal to 2.3 liters.When deprived of drinking people die after several days as a result of dehydration of tissues, when the quantity of water in the body is reduced by 12%.About 70% of water in the body - the intracellular water.In the intercellular space contains 25% water, the rest - in the bloodstream. Between the three main pool there is an intensive exchange of fluid.

Water consumption is regulated mechanism thirst.    Thirst, which is formed by a person on a subconscious level, is an indication of a violation or osmotic pressure or volume of water.     Satisfaction of thirst - Svidén-ment restore homeostasis internal environment of the body-it, its well-being. Satisfy thirst can only water with certain parameters of mineralization, adequate internal environment of the body.

The level of water consumption in the village depends on:

Season of the year;

By climatic conditions;

Degree of health improvement of the buildings

Drinking water - is not only 2-3 cups of water that people drink per day in a relaxed atmosphere everyday. Necessary for cooking 2-3 liters / day per person.  When working in hot shops in hot climates daily rate increases to 10-11 liters.In the human body water goes not only for drinking, water swallow the shower, when washing, brushing teeth, etc.

Consumption of water

Capita water consumption rates

The degree of improvement of housing conditions and water population

The average daily cost (per year), l / day / 1 person.

c centralized hot water supplyc baths and local water heaters

230-290230-290

150-200150-200

-with household taps without sanitation with street taps (in the yard)

95-12095-120

40-5040-50

Water Tashkent around the clock from 8 intake sources, including:2 - surface;6 - underground.74% - have to supply water to surface water intakes;26% - on the ground.

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