Influence of Anthropogenic Loads on Surface Water Status: A Case Study in Lithuania

Abstract

Twenty-six water bodies and 10 ponds were selected for this research. Anthropogenic loads were assessed according to pollution sources in individual water catchment basins. It was determined that 50% of the tested water bodies had Ntotal values that did not correspond to the good and very good ecological status classes, and 20% of the tested water bodies had Ptotal values that did not correspond to the good and very good ecological status classes. The lake basins and ponds received the largest amounts of pollution from agricultural sources with total nitrogen at 1554.13 t/year and phosphorus at 1.94 t/year, and from meadows and pastures with total nitrogen at 9.50 t/year and phosphorus at 0.20 t/year. The highest annual load of total nitrogen for lake basins on average per year was from agricultural pollution from arable land (98.85%), and the highest total phosphorus load was also from agricultural pollution from arable land (60%).

Riverine Hydrochemical Characteristics of a Typical Karst Urban Watershed: Major Ion Compositions, Sources, Assessment, and Historical Evolution

“…Analyzing the ratios of riverine ions can further determine the contribution sources of river materials. The fabrication and consumption processes containing chlorides (i.e., detergent, catalyst, and antibiotic) and coal combustion will release a large amount of Cl – . , Similarly, the fertilizers and pesticides applied in agricultural production contain high levels of calcium and nitrate contents. , The comparison between NO 3 – (representing agricultural pollution) and Cl – (the typical anthropogenic input ion) can distinguish the agricultural production input and municipal wastewater input (Figure a). Results show that the concentrations of NO 3 – and Cl – in the main stream were both higher than those in the tributaries in the Nanming River, and the main stream of the Nanming River shows the obvious preference for the municipal wastewater inputs (runoff sewage, domestic wastewater, etc.).…”

Methodology for assessing the geoecological state of landscape-lake systems and their cartographic modelling (case study of Lake Bile, Rivne Nature Reserve, Ukraine)

“…Limnological studies of recent years reflect only certain aspects of the complex landscape and limnological approach to the study of lakes. They are related to: 1) zonal regulation of the protection areas of the Olsztyn Lake basin, taking into account the slope coefficients of the relief (Hakuć-Błażowska, Cymerman 2011); 2) restoration of lake shores based on landscape ecology (Boromisza et al 2014); 3) assessments of the ecological consequences of hydromorphological loads on European lakes (Poikane et al 2020) and assessments of the ecological state of lakes in natural parks whose watersheds are located at different geomorphological levels (Paszteleniec, Kutyła 2015); 4) changes in water resources under the influence of natural and anthropogenic factors (Choiński et al 2016); 5) natural and anthropogenic conditions of fluctuating lake water levels (Nowak, Ptak 2019); 6) assessments of anthropogenic pollution of lakes based on the content of heavy metals in bottom sediments (Ignatavičius et al 2022); 7) correlations between water quality in reservoirs and land use within the watershed basin (Dumitran et al 2020;Česonienė et al 2021); 8) monitoring of the lake water quality according to the data of RSE (Ciężkowski et al 2022;Fesiuk et al 2022). Such a variety of approaches is natural since the development of landscape science and limnology is based on different fundamental concepts.…”

Cadastral and landscape modeling of lakes as a prerequisite for protected and recreational nature resource management

“…Among the other studies, which are similar in subject matter, it is worth highlighting the work on the anthropogenic loads on surface water status in Lithuania [7]. A model of geographic management of a nature reserve [8] was developed within the framework of the "Electronic Turkey" project.…”