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Ecological Status Assessment of the Water Bodies Located in the Lower Sectors of the Jiu and the Motru Rivers (Oltenia, Romania)

2011; Universitaria Publishing House, Craiova; Volume: X; Issue: 1 Linguagem: Inglês

10.5775/fg.2067-4635.2011.038.i

2067-4635

Sanda Adina Şerban, Oana Mititelu‐Ionuș,

Invertebrate Taxonomy and Ecology

By means of the Water Framework Directive methodology, the present study identifies the valid indicators used for evaluating the ecological status of two natural water bodies (the first located on the Jiu river between Bratovoiesti and the Danube confluence, and the second on the Motru river between the Jirov and the Jiu confluence): hydromorphological indicators, physicochemical indicators and biological indicators. The quality parameters deviated from the norm are: Shannon-Wiener Diversity Index – 2.87 for the Motru WB and Functional groups index – 0.68 for the Jiu WB (biological Indicators); modified water-cross section coefficient (depth) (1.22) – the Motru WB, impoundment coefficient (0.91) – the Motru WB and Coefficient of major streambed reduction (1.24) – the Jiu WB (hydromorphological indicators). The quality parameters (physico-chemical indicators) of the water drainage systems deviated from the norm are: Biochemical Oxygen demand BOD5 (40.78 mg/l) and Ammonium Nitrogen N-NH4