The investigation of the water quality and bed-sediment conditions in Cutetchi Lake, Danube Delta, Romania
Journal Title: Scientific Annals of the Danube Delta Institute - Year 2018, Vol 23, Issue
Abstract
Danube Delta includes many ecosystems functioning in a dynamic environment that could be considered, each of them, as ”natural laboratories”. In this sense, Cutetchi Lake was chosen for conducting practical investigations (August 2016) and the obtained data will be used to evaluate the impacts associated with natural factors or human-related activities. Water samples were investigated for physical parameters and water-quality constituents. Bed-sediments samples were analyzed for the main lithological components and trace elements to identify the levels, distribution and the potential sources of heavy metals in surficial accumulations. Related environmental standards were used to evaluate the water and sediment quality. Results indicate that, in the surface water the mean concentration of the environmental indicators ranged mainly in line with sampling points and generally agreed with reference standard: transparency (0.94 m), dissolved oxygen (8.98 mg/l), temperature (22.39 oC), conductivity (392.2 µS/cm), total dissolved solids (196.1 mg/l), pH (7.91), Eh (22 mV), turbidity (5.06 NTU), total suspended solids (9.25 mg/l), nitrite-nitrogen (0.01 mg/l), nitrate-nitrogen (0,02 mg/l), soluble orthophosphates (0.17 mg/l), sulphates (25,5 mg/l), silica (6,8 mg/l). The mean sediment parameter values were: moisture (23.13 %), dry sediment content (76.87 %), total organic matter (73.53 %), total carbonates (7.48 %) and minerogenic fraction (18.98 %). In the bed-sediment, the average metal content was: Zn (102.17 mg/kg), Ni (44.77 mg/kg), Cr (73.23 mg/kg), V (75.30 mg/kg), Co (9.38 mg/kg), Pb (24.83 mg/kg), Cu (58.70 mg/kg), Cd (0.82 mg/kg) etc., and individual values only incidentally exceed the maximum recommended level. This work could be a basis for the ongoing evaluation processes of water and sediment quality.
Authors and Affiliations
CATIANIS Irina, POJAR Iulian, GROSU Dumitru, SCRIECIU Albert, SECRIERU Dan, VASILIU Dan, PAVEL Anca Bianca
Keywords
Related Articles
- EP ID EP288232
- DOI 10.7427/DDI.23.02
- Views 121
- Downloads 0
The spatial and temporal distribution of the shads in Black Sea marine zone of Danube Delta Biosphere Reserve
Three species of the shads (Alosa genus) are known to live in the north-western Black Sea including Pontic shad (Alosa immaculata - Bennett, 1835), Black Sea shad (Alosa maeotica - Grimm, 1901) and Azov shad (Alosa tanai...
Natural production of the calorific value from poplar clones and socioeconomic aspects of its wider use in Slovakia
The calorific value produced from the poplar clone stands’ above-ground biomass was derived from its volume production, and calculated by mathematical model growth tables of I214 and Robusta poplar clones’ biomass densit...
Fish and macrophyte assessment of Ciuperca Lake after rehabilitation works (Tulcea City, Romania)
In order to improve the quality of life, in urban ranges, there is a continuous effort for smallscale leisure areas maintenance in the benefit of inhabitants by means of provided environmental, social and psychological s...
Fish fauna from ROSCI0103 Buzau meadow (Romania)
In the autumn 2010 ichthyofauna was investigated in ROSCI0103 Buzau meadow Natura 2000 site (from Siriu dam to near Vișani locality, in main riverbed). The status of fish species of community interest (An. II / H.D.) ins...
Preliminary Data on the Studies of Alosa immaculate in Romanian marine waters
Danube shad is a fish with high economic and socio-cultural value for the human communities established in the Danubian-Pontic space. In Romania, shad fishery has a market value of about 1.5 million euro, with average an...