Rīgas līča piekrastes zonas ūdens caurspīdību ietekmējošo faktoru analīze
Date
2013
Authors
Borisova, Viktorija
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Journal ISSN
Volume Title
Publisher
Latvijas Universitāte
Abstract
Darbā ir apskatīts viens no HELCOM izvirzītiem Baltijas jūras ekoloģiskās kvalitātes kritērijiem – ūdens caurspīdība. Ir veikti salīdzinoši maz pētījumu, kas attiecas tieši uz šo kritēriju un to ietekmējošiem faktoriem. Vēl mazāk pētījumi ir viekti Baltijas jūras piekrastes zonā, kaut arī tieši šī jūras daļa ir visvairāk pakļauta slodzei.
Pētījuma mērķis bija izpētīt faktorus, kas ietekmē caurspīdību Rīgas līča piekrastes zonā. Pētījuma rezultātā tika konstatēts, ka caurspīdību dažādos dziļumos atšķirīgi ietekmē katrs no parametriem. Mazākos dziļumos vienlīdz liela ietekme ir gan hlorofila a koncentrācijai, gan suspendētā materiāla, bet palielinoties dziļumam saglabājas tikai hlorofila a noteicošā ietekme. Suspendētais materiāla un kopējā oglekļa daudzums, attālinoties no krasta samazinās, līdz ar to samazinās arī to ietekme uz Seki dziļumu.
Atslēgas vārdi: Baltijas jūra, Rīgas līcis, ūdens caurspīdība, hlorofila „a”, suspendētais materiāls, kopējais ogleklis.
Research work is made about one of the HELCOM defined sea ecological criteria – water transparency. Very few research has been made about this criteria and its affecting factors. Even less researches is made in coastal area, although coast is part of the sea that is most affected by loads. The aim of the work was to analyze factors, that affect water transparency in coastal zone of Gulf of Riga. During research was found that transparency in different depth is affected by each of the factors. In the smalest depths the most affecting factors are chlorophyll a and suspended matter concentrations, but in bigger depths – only chlorophyll a. Suspended matter and total carbon concentrations influence on transparency is becoming less, while depth is rising, so these factors affect Seki depth less. Key words: Baltic Sea, Gulf of Riga, water transparency, chlorophyll a, suspended matter, total carbon.
Research work is made about one of the HELCOM defined sea ecological criteria – water transparency. Very few research has been made about this criteria and its affecting factors. Even less researches is made in coastal area, although coast is part of the sea that is most affected by loads. The aim of the work was to analyze factors, that affect water transparency in coastal zone of Gulf of Riga. During research was found that transparency in different depth is affected by each of the factors. In the smalest depths the most affecting factors are chlorophyll a and suspended matter concentrations, but in bigger depths – only chlorophyll a. Suspended matter and total carbon concentrations influence on transparency is becoming less, while depth is rising, so these factors affect Seki depth less. Key words: Baltic Sea, Gulf of Riga, water transparency, chlorophyll a, suspended matter, total carbon.
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