Fizikalno-kemijske i biološke značajke vode potoka Vranča i bunarske vode okolnih kućanstava

master's thesis

• Title (english): Physico-chemical and biological characteristics of the Vranča stream and draw-well water from the surrounding households
• Author: Ana-Marija Širjan
• Mentor: Mirela Sertić Perić (mentor)
• Committee member: Mirela Sertić Perić (predsjednik povjerenstva)
• Committee member: Tomislav Ivanković (član povjerenstva)
• Committee member: Borna Lužar-Oberiter (član povjerenstva)
• Committee member: Neven Bočić (član povjerenstva)
• Committee member: Nenad Buzjak (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2020-02-28, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

U ovom radu opisano je istraživanje provedeno tijekom osam tjedana u rujnu i listopadu 2019.
godine. Područje istraživanja obuhvatilo je pet postaja na potoku Vranča te tri bunara okolnih
kućanstava u selu Gornji Fodrovec (Koprivničko-križevačka županija), smještenih na udaljenosti od ca.
50 – 170 m od potoka Vranča. Kroz deset terenskih izlazaka provedena su mjerenja fizikalnokemijskih
parametara za vodu na svih osam postaja, a dva puta mjesečno uzeti su uzorci
makrozoobentosa s početne (referentne) i krajnje postaje na potoku za biološku analizu. Naknadno
su uzeti i uzorci bunarske vode za mikrobiološku analizu. Rezultati mjerenja potvrdili su dobru
kakvoću vode na referentnoj postaji te zagađenje, odnosno visoko opterećenje vode potoka
organskim tvarima nizvodno od referentne postaje, odnosno u području utjecaja naselja i
poljoprivrednih djelatnosti. Bunarska voda prema rezultatima također pokazuje opterećenje
nutrijentima, na što ukazuju povišene koncentracije nitrata i ortofosfata. Zastupljenost pojedinih
taksonomskih skupina makrozoobentosa na potoku ukazuje na dobru kakvoću vode na referentnoj
postaji (npr. prisutnost vrste roda Gammarus sp. i predstavnika Plecoptera, koji se smatraju
indikatorima čistih tekućica), dok dominacija jedinki Oligochaeta i Chironomidae (indikatora za vode
opterećene organskim tvarima), potvrđuju zagađenost potoka nizvodno u području naseljenog
poljoprivrednog mjesta. Dodatnom mikrobiološkom analizom bunarske vode utvrđena je prisutnost
koliformnih bakterija kao glavnih indikatora bakterijskog zagađenja vode. Utvrđena je i prisutnost
ukupnih koliforma, enterokoka te bakterija vrste Escherichia coli i roda Pseudomonas. Bunarska voda
prema rezultatima mikrobiološke analize nije za piće.

Abstract (english)

The research described in this thesis was carried out over eight weeks during September and October
2019. The research area included five sampling sites along Vranča stream and the three surrounding
households' draw-wells in Gornji Fodrovec village (belonging to Koprivnica-Križevci county),
positioned at the distance of approximately 50-170 m from the Vranča stream. During the ten field
occasions, water physico-chemical parameters at the eight sampling sites were measured, whereas
the macrozoobenthos samples were taken at the first sampling site (a reference point) and at the last
sampling site at the beginning and at the end of each month for the biological analysis. Additionally,
the draw-well water samples were taken for microbiological analysis. The results showed good water
quality at the reference site, but a considerably high load of organic matter at the downstream sites,
which were influenced by the human settlement and the agricultural activities. According to the
results, a high nutrient levels were present in the draw-well water samples, as shown by the elevated
concentrations of nitrates and orthophosphates. The presence of specific stream macroinvertebrate
taxa indicated a good water quality at the reference site (e.g., the presence of Gammarus sp. and the
representatives of Plecoptera, considered as the indicators of a high stream water quality), while the
dominance of Oligochaeta and Chironomidae specimens (i.e., indicators of high load organic matter
in streams) confirmed the water pollution at the downstream sites, within the inhabited agricultural
areas. The additional microbiological analysis of the draw-well water confirmed the presence of the
coliform bacteria, being the main indicators of bacterial water contamination. The results confirmed
the presence of the total coliforms, enterococci, Escherichia coli and Pseudomonas specimens.
According to the results, the draw-well water was not proved suitable for drinking.

• Keywords: potok Vranča; bunari; stočne farme; antropogeni utjecaj; fekalno zagađenje; makrozoobentos
• Keywords (english): Vranca stream; wells; animal farms; antropogenc influences; fecal contamination; macrozoobenthos
• Language: croatian
• URN:NBN: urn:nbn:hr:217:606800
• Study programme: Title: Enviromental Sciences; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra struke znanosti o okolišu (magistar/magistra struke znanosti o okolišu)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access; Embargo expiration date: 2022-02-28
• Created on: 2020-06-09 10:20:50