Šiaulių miesto paviršinių vandens telkinių ekologinės būklės įvertinimas /

The theme of Bachelor thesis – Surface water bodies ecological assessment of Šiauliai city. The aim of the research – evaluate ecological status of Rekyva, Talksa, Ginkunai lakes and Prudelis pond. This work analyzes the main European Union and national legislation on the protection of water. The statistical information on current status of surface waters bodies monitoring, implemented water protection measures, implemented water projects. For surface water bodies ecological status assessment in april – may perform Rekyva, Talksa, Ginkunai lakes and Prudelis pond water quality tests, measured total phosphorus (Pb), total nitrogen (Nb) and chlorophyll „a“ concentration, water transparency. In research period the total phosphorus ranges from 0,031 mg/l to 0,084 mg/l. The biggest concentration of total phosphorus was found in Ginkunai lake, in may. Total nitrogen concentration rages from 1,8 mg/l to 2,5 mg/l. The biggest concentration of total nitrogen was found in Prudelis pond, in may. Chlorophyll „a“ concentration rages from 16,2 µg/l to 41,2 µg/l and the biggest concentration was found in Prudelis pond, in may. Water transparency rages from 57 cm to 145 cm. Biggest water transparency was found in Talksa lake, in april. In terms of measured total phosphorus (Pb), total nitrogen (Nb), chlorophyll „a“ the surface water bodies ecological status is avarage. In order to improve ecological status of Rekyva, Talksa, Ginkunai lakes and Prudelis pond first of all need to reduce nutriant inflow to this water surface bodies with untreated waste water; using biological sorbents reduce their concentration in water bodies; dug up the excess sludge; manage shore vegetation.

Grantor dc:publisher

Institutional Repository of Vilnius University

Year dc:date

2015

Author dc:creator

• Šimkevičius, Andrius,

Contributors dc:contributor

• Klimas, Robertas

• Bachelor ; water ; ecology ; environmental ; surface.

Statement dc:rights

• info:eu-repo/semantics/openAccess

Language dc:language

lit

Repository record dc:identifier

https://repository.vu.lt/VU:ELABAETD8727223&prefLang=en_US

OAI identifier oai:identifier

oai:vu.lt:elaba:8727223