Estimation of pollution level of lake Yalpuh as an object of fishing purpose
Journal Title: Український гідрометеорологічний журнал - Year 2018, Vol 22, Issue 22
Abstract
The work offers estimation of Lake Yalpuh's water quality for a long period as a fishery object. The preliminary analysis of the dynamics of water quality indicators change showed that there was a decrease of concentrations of almost all quality indicators during the period of the study (2003 - 2017). According to the results of the estimation, the water quality of Lake Yalpuh in the top section was characterized by the "very dirty" category, the quality class was marked as IVc-IVd. Most often such indicators as dry residue, magnesium, chlorides, sulfates were taken as limiting indicators of pollution. During the research the quality of lake water was did not change significantly. The maximum level of pollution was observed in 2004. The water of the lake at the water intake section was also characterized by the "very dirty" category, the quality class was marked as IVb - IVd. Most often such indicators as magnesium and sulfates were taken as limiting indicators of pollution. During the period of research there was a tendency towards a decrease of the lake's level of water pollution. The maximum level was observed in 2003 – 2004. The waters of the lake in the 13th km section was characterized by the "dirty" (quality class ІІІa-ІІІb) and "very dirty" (quality class IVa-IVc) categories. Most often such indicators as magnesium and sulfates were taken as indicators of limiting pollution. Significant fluctuations of the level of the lake water pollution were observed. The maximum level was observed in 2004. The general analysis of the dynamics of change of the combinatorial index of water pollution in Yalpuh Lake at three sections for 2003 - 2017 showed that the maximum level of water pollution in the lake was observed at the first section (top), the minimum – at the 13th km section. There is a tendency towards decrease of the value of the combinatorial index of pollution. Virtually the entire territory of the Yalpuh River Basin is located at the southern part of Moldova where the state of wastewater treatment is unsatisfactory. Therefore, the level of pollution in the lake often exceeds the permissible standards. In recent years, due to decrease mineral fertilizers and pesticides use in Moldova's agricultural sector, the situation improved though.
Authors and Affiliations
A. V. Chugai
Keywords
Related Articles
- EP ID EP528836
- DOI 10.31481/uhmj.22.2018.13
- Views 91
- Downloads 0
Effect of forestry of the southern Ukraine on the regulation of carbon dioxide in the atmosphere
The article describes Tsyurupinsk Forest Hunting Range as the most powerful natural ecosystem having an effect on regulation of technology-related processes, namely on reduction of carbon dioxide stress on the environmen...
Discomfort of weather conditions during winter period in Ukraine
At the end of the XX century and at the beginning of the XXI century climate change was one of the major problems of international community. Today the problem is still relevant. This is due to a significant change of li...
Convective phenomena forecasting based on output data of numerical models available in the Hydrometeorological Centre of the Republic of Belarus
In the article you can read about the methods used for forecasting convective processes by means of output products of numerical models with various spatial resolution. It presents the methods for forecasting convective...
Spatio-temporal distribution of atmospheric precipitation in the Odesa region at the beginning of the 21st century
During the last decade of the 20th and at the beginning of the 21st century there was a need for a higher level of understanding of the climate system and development of opportunities to prevent climate change and, first...
Current distribution of wind in Morocco
Information about wind is widely used in many sectors of the economy. Wind also causes many dangerous and extreme weather events. Modern climate changes require a certain revision of weather patterns previously accepted...