Spatio-temporal evolution of eutrophication and water quality in the Turawa dam reservoir, Poland

Abstract

The objectives of the article are: to assess spatio-temporal evolution of eutrophication and water quality of the Turawa dam reservoir, located in south-western Poland on the Mała Panew River; to identify location and relationship between potential sources of physicochemical pollution related to the progressing process of eutrophication; and to determine trophic status and water quality indices of the selected research object. The analysis (Mann–Whitney U test, PCA, HCA, Spearman correlation matrix) showed a high susceptibility of the reservoir to eutrophication processes, especially due to the influence of dangerous loads of compounds emerging from areas with high tourist intensity and pollutants flowing from the Mała Panew River. The parameters deteriorating the ecological status were TP, DO, BOD5, and COD. Considering the cumulative results of water quality indices for the period 1998–2020, the average water quality was in classes II or III. A noticeable deterioration appeared in water quality for the years 2016–2020, which proves the progressing eutrophication in the Turawa reservoir. In 1998–2020, the reservoir was classified as eutrophic or mesoeutrophic based on the calculated three trophic status indices. This article would help in developing a strategy for dealing with water blooms, a reliable system for monitoring pressures causing eutrophication, and optimal technologies for the reconstruction of multifunctional reservoirs.

Effective microorganism water treatment method for rapid eutrophic reservoir restoration

“…Thus, there is an inverse correlation (Lv et al 2022 ; Sun et al 2022 ). It is worth noting that, as shown in other studies on the eutrophic Turawa reservoir (Czerniawska-Kusza and Kusza 2011 ; Buta et al 2023 ), nitrogen compounds in the water come mainly from external sources of agricultural origin, while phosphorus compounds come from internal sources, i.e., resuspension of sediments.…”

“…Moreover, according to research results for the period 1998–2020 (Buta et al 2023 ), the trophic status of the Turawa reservoir, expressed by the Carlson index (Carlson 1977 ; Carlson & Simpson 1996 ) and the Vollenweider and Kajak criterion (Vollenweider 1965 ; Kajak 2001 ) is classified as eutrophic, and according to the Trophic Level Index (Abell et al 2020 ; Ding et al 2021 ) — as supertrophic. It is worth adding that TN was on average 10 times more responsible for eutrophication than TP , taking into account the values of dangerous loads of both parameters according to the Vollenweider and Kajak method (Vollenweider 1965 ; Kajak 2001 ).…”

“…It is worth adding that TN was on average 10 times more responsible for eutrophication than TP , taking into account the values of dangerous loads of both parameters according to the Vollenweider and Kajak method (Vollenweider 1965 ; Kajak 2001 ). As indicated, the causes of water blooms in the area were municipal sources, i.e., waste (thrown away by tourists and residents) and agriculture (surface runoff of fertilizers and plant protection products from fields) (Buta et al 2023 ; Smith et al 1999 ).…”

Operational Mode for Water–Sediment Regulation in Plain-Type Sand-Laden Reservoirs: A Case Study of the Haibowan Reservoir

“…The Hirakud Reservoir in India lost approximately 22% of its effective storage capacity because of sedimentation, leading to reduced water storage capacity and increased flood risk [5]. At the same time, the construction of reservoir dams inevitably brings ecological problems, such as changing the landform characteristics [6] and runoff distribution [7] of the downstream river, reducing the diffusion capacity of pollutants in the reservoir area, and easily producing water eutrophication [8]. These examples highlight the global issue of the effect of sedimentation on reservoirs.…”

Spatiotemporal Variations of Water Eutrophication and Non-Point Source Pollution Prevention and Control in the Main Stream of the Yellow River in Henan Province from 2012 to 2021

“…In nature, water exists in various forms, and humans primarily utilize freshwater resources, specifically groundwater and surface water. These sources constitute a relatively small portion of the total global water resources [1]. Consequently, high-quality water resources play a pivotal role in preserving the ecological integrity and fostering social and economic development.…”