Assessment of the ecological state of small lakes in system of the lake Velie system of the Valday National Park

Abstract

Valdaisky National Park is a protected area located on the territory of the Novgorod region of the Russian Federation. The park was created in 1990 to preserve the natural complex of the Valdai Upland, and to organize ecological tourism on its territory.n important part of the park are water areas: within the boundaries of the park there are more than 270 lakes, the largest of which form the boundaries of the park. One of the most significant - Lake Veljo - has been the object of environmental research over the past decade. However, small lakes (Ukleinskoye and Pavlovo), which are part of the Velyo system, have not been investigated. The task of the study was to determine the ecological state of such lakes and assess their impact on the state of the lake. Vello.For the water of each studied reservoir, the main hydrochemical parameters were determined. Based on the results of the research, a water pollution index was calculated for each lake, according to the results of which they were assigned a water quality class. Both studied reservoirs belonged to the II class of quality, which characterizes them as clean. Previous studies of the Veljo waters showed the same results. Thus, on the basis of this, it can be tentatively assumed that the negative impact of the Pavlovo and Ukleinskoe lakes on the lake. Vello is missing. However, further studies of the waters of these lakes are necessary, since for many reasons the situation may change for the worse. Pollution of small lakes will also affect Veljo, which will lead to negative consequences in various industries.