CORRELATION INTERACTION BETWEEN ELECTRICAL CONDUCTIVITY AND NITRATE CONTENT IN NATURAL WATERS OF SMALL RIVERS

The main feature of the small rivers is their close ties with the landscape. Small rivers are the regulators of the water regime of the landscapes, the factors for maintaining balance and redistribution of moisture, as well as "the factors that determine the hydrological and hydro chemical specific of medium and large rivers. Basin of a small river is a ccimplex self-regulating system. Basin of small rivers is an indicator, of the environment state, due to the level of anthropogenic load which are landscapes, soils, surface and underground water, flora and fauna, the atmosphere. Ecosystems of the small rivers first react to changes in the interaction of the system "person-society-nature". So the actual remains is monitoring of the small rivers condition. The aim is analysis of interaction between Parameters of the quality of the water environment like conductivity and nitrates on the example of natural waters of small rivers. Objects are a small rivers Bist and Rosselle Saardand lands (Germany). In this study we used the method of correlative analysis which is effective and efficient for the determination of connections between the parameters of water quality that helps to identify sources of pollution, as well as interpret phenomena, forecast the situation related to the change in the quality 'of natural waters. The hydrochemical monitoring data were obtained from autonomous automated stations that are located on the rivers Bist and Rossel. We investigated the following correlation dependencies between such combinations of natural waters quality parameters: nitrates and conductivity. Monitoring data are processed using software MS Excel; correlation dependence was defined using the CORREL. Correlation value is changed in the range from -1 to + 1 that demonstrates the indirect and direct dependence between the selected parameters. If the value is closer to +1, this means the presence of a strong connection, if closer to 0 - weak. The negative correlation coefficient means the presence of the opposite connection. The time periods for the calculation of the correlation between the parameters of natural waters quality is selected: 4, 8, 16 and 24 hours respectively. The following time periods allow the best to trace and predict changes in the natural aquatic environment. Correlation analysis of the concentration of nitrates and conductivity showed that for r. Bist and r. Rosselle dominates is the positive value of the correlation between the study parameters, which proves their strong interaction. However, at certain concentrations of nitrate-ions observed custom phenomenon of sharp decrease in correlation to the "-1", which is explained by the Onsager equation, namely an excess concentration of nitrates is associated with erosion of different types of fertilizers from the fields as a result of rainfall.