CHEMICO-ECOLOGICAL EVALUATION OF THE QUALITY OF LAKE ARPI WATERS ACCORDING TO NUTRIENT ELEMENTS

Nowadays, natural reservoirs and all water resources are evaluated insufficient in the Republic of Armenia. This status of water resources leads to the ecological disbalance between nature and society. The unsparing and intensive use of water resources, incomplete mechanisms of their management, monitoring and quality evaluation have been accompanied with the increase of the technogenic load and the deterioration of reservoirs and surface waters and their depletion in some cases. All of this is observed in Lake Arpi watershed basin. Lake Arpi is situated in the north-west of the Republic of Armenia. Discussed in this article are the results of the content researches of nutrient elements in Lake Arpi. Seasonal variation regularities of nutrient elements was observed in Lake Arpi. According to ammonium ion concentration, water quality of Lake Arpi ranged between very clean and polluted. Four-year researches revealed that chemico-ecological evaluation of the quality of Lake Arpi waters, according to nutrient elements, was satisfactory, and this could not prevent the normal growth of the lake ecosystem.