Wyniki wyszukiwania - BazTech

1

Monitoring małych rzek wyżynnych na przykładzie potoku Łękawka (gmina Bestwina, województwo śląskie)

Salachna Anna, Widuch Dominika

Polish Journal of Materials and Environmental Engineering

|

2023

|

Vol. 5 (25)

41--49

EN

The paper presents the assessment of the water condition of the Łękawka stream according Water Framework Directive, carried out on the basis of research on benthic macroinverte-brates and the analysis of data on other indicators used in the monitoring of waters. Sampling of macroinvertebrates, taxonomic identification and calculation of the MMI_PL index were car-ried out in accordance with the Multi-Habitat Sampling (MHS) method according to the EU standard EN16150:2012, used in Poland for the monitoring of surface waters. Field studies were carried out in September 2022. From each site, 20 quantitative samples were taken from various fractions of the substrate present in the bottom, using a Surber net. Data on other biological indicators, physicochemical and hydrobiological parameters and chemical status were obtained from the resources of the State Environmental Monitoring, concerning the re-sults of monitoring of rivers and dam reservoirs in Poland in 2016-2021. Studies of the inver-tebrate macrofauna of the Łękawka stream showed the occurrence of only nine families, dom-inated by taxa with a wide range of ecological tolerance. The final assessment of the ecological status of the Łękawka water body, according to the RDW guidelines, based on the results of monitoring studies, showed a bad ecological status (class V) of the ecosystem. The key influence on this assessment, in accordance with the principle "the worst decides" was the value of the Polish Multimetric Ecological Quality Index MMI_PL, confirmed by the results of the hydromorphological index (HIR). The chemical status of the examined water body, de-termined on the basis of the results of monitoring priority substances in the field of water policy (a group of 45 indicators) and other pollutants (eight indicators), showed a "below good" class. Finally, on the basis of a comparison of the ecological and chemical status, the bad condition of the Łękawka stream was confirmed. The obtained results indicate a significant disruption in the functioning of the water ecosystem as well as a violation of the hydrological regime and morphological conditions of the streambed. It means that the achievement of the environmen-tal goal set by the Water Framework Directive is very seriously threatened. Therefore, it is nec-essary to urgently regulate activities in the field of water and sewage management in the catch-ment area, regarding water intake and discharge of municipal and industrial sewage.

2

Jakość wody rzeki Wisły i jej dopływów na terenie wybranych gmin powiatu cieszyńskiego (Polska południowa)

Salachna Anna, Kumorek Adrianna, Legierska Anna, Janecki Michał

Polish Journal of Materials and Environmental Engineering

|

2022

|

Vol. 4 (24)

41--49

EN

The paper presents an assessment of the water quality of the Vistula river and its tributaries in selected municipalities in the Cieszyn district based on benthic macroinvertebrates. A total of 45 samples were taken on nine positions. Most of the collected individuals were identified to the family level, except: Heptageniidae which was diagnosed to the genus; Turbellaria and Oligochaeta identified into the class. The conducted research showed that 54 taxa of benthic macroinvertebrates occurred at the analyzed sites. Among them, 40 taxa have a bioindica-tive value. The most sensitive to pollution are mayflies from the family Ameletidae and caddisflies from the families Glossosomatidae, Leptoceridae and Beraeidae. However, their fre-quency and density at the study sites was very low. The families Ephemerellidae, Heptageniidae, Hydropsychidae and Polycentropodidae as well as annelids from the Oligochaeta class were much more frequent. Based on macrozoobenthos diversity data, two biological indices were calculated: BMWP-PL index and Margalef’s biodiversity index. The values of these biological indicators was using to the classiffication of water into the appropriate quality class. The final classification showed that the examined sections of the Vistula river represents the I, II and III class of water quality what indicated high, good and moderate ecological potential/state. The first class of water quality in terms of both indices was recorded at the sites located in Ustroń, Skoczów and Drogomyśl. For these positions, the value of the BMWP-PL index was over 100, while the value of the Margalef’s index was in the range of 6.26–7.17.The lowest, third class of water quality was found in Kiczyce and Ochaby Wielkie. In these places, the diversity of macroinvertebrates was the lowest, which was reflected in the low values of both studied indices (BMWP-PL: 40; 41, Margalef's index: 2.6; 3.37).

3

Application of Adapted Benthic Index of Biotic Integrity (B-IBI) for River Ecosystem Health Assessment in Zhanghe River Watershed, China

Cui W.-Y., Guo S-Y., Meng X.-Z., Kong F.-Q.

Polish Journal of Ecology

|

2018

|

Vol. 66, nr 4

407--415

EN

In order to evaluate the ecological health condition of Zhanghe River Watershed, an adapted Benthic Index of Biotic Integrity (B-IBI) was developed. Macro-invertebrates were sampled at 12 monitoring stations which were grouped into two condition categories (reference and impaired stations) according to the level of degradation. A total of 47 benthic macroinvertebrates taxa were identified, in which aquatic insects 33 taxa, Mollusca 8, Annalida 3 and Crustacea 3 taxa. Based on macro-invertebrate assemblages characters of this area, 18 candidate biological metrics in four categories, including taxonomic richness, community composition, pollution tolerance, trophic guild, and value distribution, were chosen. In which, four metrics were excluded because of low values or narrow distribution range. Discriminatory power between reference and impaired stations was analysed using box-plots, and six metrics were excluded because the medians of the box-plot inside the inter quartile range. Of all the rest eight metrics, four were not suitable for B-IBI index system because of their high Pearson correlation (| r | 0.75). Finally, total taxa, percentage of Crustacea and Mollusca, percentage of tolerant taxa and percentage of predators were screened out to form a B-IBI index system. Ratio scoring method for B-IBI index was used to get a uniform score. Evaluation criterion was established based on the 25 percentiles value of reference stations. Assessment results using B-IBI showed 5 of sampling stations were in ‘healthy’ and ‘sub-healthy’ state, 3 were in ‘fair’ state, and 4 were in ‘poor’ or ‘very poor’ state of the whole watershed.