Reports on Environment and Urban Development for Alaverdy

GEO ALAVERDI: ENVIRONMENT AND URBAN DEVELOPMENT

In order to provide water by Lenhanqer district main, there is a need to construct a pumping station; the daily supply reservoirs of “Sanahin” and “Pirazyan” are out of order. There is a total capacity of W=4600m 3 in the daily supply reservoirs, out of which only 3300m 3 is used, the remaining 1300m 3 capacity in the daily supply reservoirs do not work because of large quantity of losses. The supply network consists of brass and steel pipes (d=50-250mm), the total length of which is 50km. The construction of the aforementioned supply and distribution networks of Alaverdi started mainly from the 1960s and partially continued up to 1990, after which very little repairs were done, only when the need thereof occurred during the operation. The quantity supplied to the tap of the consumer is about 40 l/sec., the remaining quantity of water entering the city comprises the losses and unaccounted quantities. The existing supply system is in a technically insuf fi cient condition and needs reconstruction. Taking into account the geodesy of the territory occupied by Alaverdi, that changes between 700-1180m, as well as the existing daily supply reservoirs in the city, located at 800,11m, it will become clear that the daily supply reservoirs will not be able to satisfy the needs for the whole city, by providing the necessary pressure, proper and safe supply to all the consumers. That was the main reason that a number of houses in certain streets are fed from the main directly. The distribution and the plumbing are in a bad condition, with losses accounting to 75-80%. 75% of the whole network needs rehabilitation. Thus, because of the mentioned weaknesses, the consumers have water only for several (average 6) hours in a daytime; in some better conditions (supplied directly from the main) the water supply can even reach 24 hours. Wastewater collection (sewage). Only 45% of Alaverdi has sewage. Villages Akner, Lenhanqer, Sanahin do not have sewage. The private residential areas, which comprise 30% of the total residential fond of the area have septic pits or discharge the wastewaters directly into Debed River. The wastewater collectors of Sarahart and Engels, as well as the city’s main collector, made of ferroconcrete and steel, work partially. The wastewaters do not reach the treatment plant; they are discharged into Debed, on the way. The existingwastewater collection network and the collectors were constructed in the period of 1959-1980. The total length of the network and the collector is about 50km (without the internal district plumbing and pipelines. A lot of sections of the network are blocked and do not operate currently. In 1979 a full power microbiological wastewater treatment plant of total

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CHAPTER 2. SOCIO – ECONOMIC AND POLITICAL CONTEXT

Environmental Knowledge for Change