HYDROBIOLOGICAL STUDY OF BURHI GANDAK RIVER NEAR URBAN AREA AT SAMASTIPUR (BIHAR)

Hydrobiological studies of Burhi Gandak river were carried out for a period of one year from March, 2019 to February, 2020 at two stations of urban area of Samastipur town, Bihar. The parameters taken included the water temperature, transparency, pH, dissolved oxygen, magnesium, and calcium. These properties were analyzed and compared with standard values recommended by bureau of Indian standards and world health organization. Present investigation was undertaken to ascertain the water quality status of Burhi Gandak river at Samastipur town. The results revealed that there were significant seasonal variations in most of the parameters; water was found to be hard, polluted and not suitable for domestic, agricultural and fish growth.

Hydrobiological Study of the Yamuna River at Kalpi, District Jalaun, Uttar Pradesh, India

Hydro biological study of the Yamuna river at Kalpi in India was carried out for a period of twelve month (October 2013 to September 2014). Four sampling stations were selected for sampling purpose. Collected samples were evaluated for fourteen physico-chemical parameters such as W.T., pH, Conductivity, Turbidity, T.D.S., T.H., T.A., Cl, SO4, PO4, NO3, D.O., B.O.D. and C.O.D. and four biological parameters such as phytoplankton, zooplankton, aquatic macrophytes and fishes. Present study reveals that water quality of the Yamuna river was not fit for drinking purpose but it was satisfactory for fish culture and irrigation purpose. Presence of both pollution tolerant and pollution intolerant species of biological parameters shows that this water was moderately polluted during course of study. HYDRO Nepal Journal of Water Energy and EnvironmentVolume- 18, 2016, JanuaryPage -41 to 46

Hydrobiological study of the middle course of the Bečva River

The present work gives the results of the hydrobiological research of the middle course of the Bečva River in the river section between Valašské Meziříčí and Přerov, carried out in the years 2004 to 2007. Altogether, 65 taxa of macrozoobenthos were determined in the period 2000-2007 in the middle course of the Bečva River : Coelenterata (1 taxon), Oligochaeta (5 taxa), Hirudinea (3 taxa), Gastropoda (4 taxa), Isopoda (1 taxon), Amphipoda (2 taxa), Hydracarina (1? taxon), Ephemeroptera (7 taxa), Plecoptera (1 taxon), Odonata (3 taxa), Heteroptera (1 taxon), Megaloptera (1 taxon), Trichoptera (9 taxa), Coleoptera (3 taxa), Diptera (23 taxa). The number of zoobenthos taxa fell in the period 2004–2007 in comparison to period 2000–2002 from 51 taxa to 40 taxa. The decline of zoobenthos taxa was registered on study localities, as follows : Choryně (from 28 to 23 taxa), Hustopeče (from 27 to 25 taxa), Rybáře (from 35 to 28 taxa), Grymov (from 31 to 25 taxa). Average saprobity index of benthic community of the middle course of the Bečva River was 2.35. Average saprobity indices of monitored localities towards downstream were as follows: Choryně 2.41; Hustopeče 2.25; Rybáře 2.40; Grymov 2.34.

Hydrobiological study of the small stream on the Czech–Moravian Highlands

Zoobenthos of the Fryšávka Rivulet was investigated in the years 2007–2008. Research included also physico-chemical factors of water (temperature, pH, conductivity, oxygen saturation). Altogether, 144 taxa of zoobenthos were determined in the Fryšávka Rivulet: Coelenterata (1 taxon), Turbellaria (1 taxon), Oligochaeta (6 taxa), Hirudinea (1 taxon), Mollusca (5 taxa), Amphipoda (1 taxon), Decapoda (1 taxon), Acari (1 taxon), Ephemeroptera (18 taxa), Plecoptera (18 taxa), Heteroptera (1 taxon), Megaloptera (1 taxon), Planipennia (1 taxon), Trichoptera (36 taxa), Coleoptera (8 taxa), Diptera (44 taxa). Altogether, 76 taxa of zoobenthos were determined in Medlovka brook: Coelenterata (1 taxon), Turbellaria (1 taxon), Oligochaeta (2 taxa), Mollusca (1 taxon), Isopoda (1 taxon), Amphipoda (1 taxon), Acari (1 taxon), Ephemeroptera (14 taxa), Plecoptera (8 taxa), Megaloptera (1 taxon), Trichoptera (17 taxa), Coleoptera (6 taxa), Diptera (22 taxa).The average abundance of zoobenthos of the Fryšávka Rivulet was 3208 ind.m−2, the average biomass was 7.5 g . m−2, respectively. The same values for the Medlovka brook were: abundance 3238 ind.m−2 and biomass 5.8 g . m−2. The average value of the saprobic index for the whole Fryšávka Rivulet was 1.25 (oligosaprobity), for the Medlovka brook 1.42 (oligosaprobity).

Hydrobiological study of the Bobrava rivulet

The qualitative and quantitative composition of macrozoobenthos in the Bobrava rivulet was summarized utilizing former and recent studies. Altogether, 187 taxa of macrozoobenthos were determined in the Bobrava rivulet and its tributaries until now. The highest values of macrozoobenthos were found on the stony substrate with mean values of biomass and density corresponding to 18.7 g . m−2 and 2922 ind . m−2, respectively. Lower values were determined on the muddy and sandy substrates with 12.4 g . m−2 and 1587 ind . m−2, and 4.2 g . m−2 and 531 ind . m−2, respectively. The index of saprobity upstream the town Rosice corresponded to oligo-betamesosaprobity. Downstream the towns of Rosice, Omice and Radostice on the middle course of the Bobrava rivulet, water duality declined to beta – to alphamesosaprobity. Due to the self-purification ability of the stream, its water quality was improved to beta-mesosaprobity bellow the municipal pollution sources in the river stretch between localities Závist and Želešice.