Klaudija Sapač (Author), Katarina Kavčič (Author), Andrej Vidmar (Author), Matej Sečnik (Author), Mitja Brilly (Author)

Abstract

Cilj projekta Ljubljanica povezuje je izboljšati življenjske razmere ogroženih ribjih vrst v reki. Ustrezne življenjske razmere so poleg povezanosti reke odvisne tudi od fizikalnih in kemijskih lastnosti vode (npr. temperatura in kisik), katerih vrednosti spremljamo s kontinuiranimi meritvami. Analizirali smo izmerjene vrednosti temperature vode in koncentracije raztopljenega kisika na merilnih mestih nad in pod zapornico na Ambroževem trgu. Za obdobje meritev med januarjem 2013 in julijem 2014 smo izračunali povprečne mesečne vrednosti obeh parametrov, določili njuno medsebojno odvisnost in odvisnost temperature vode od temperature zraka ter preverili vpliv zapornice na Ambroževem trgu na koncentracijo raztopljenega kisika v vodi pod zapornico. Ugotovili smo, da so povprečne mesečne vrednosti koncentracije raztopljenega kisika nad zapornico večji del obravnavanega obdobja nižje od koncentracij pod zapornico. Vzrok za razliko med koncentracijami pripisujemo turbulentnemu toku, za katerega je značilno učinkovitejše raztapljanje kisika v vodi. Med temperaturo vode in koncentracijo raztopljenega kisika je visoka negativna linearna korelacija, med temperaturo zraka in temperaturo vode pa visoka pozitivna linearna korelacija. Ugotavljamo tudi, da so na obravnavanih merilnih mestih kisikove in temperaturne razmere ugodne za ciljne ribje vrste projekta. Na 17 merilnih mestih vzdolž reke Ljubljanice bomo nadaljevali s kontinuiranimi meritvami parametrov vode, s katerimi bomo pridobili večji nabor podatkov.

Keywords

Ljubljanica povezuje;raztopljeni kisik;temperatura vode;korelacija;vodostaj;

Data

Language: Slovenian
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FGG - Faculty of Civil and Geodetic Engineering
Publisher: Univerza v Ljubljani, Fakulteta za gradbeništvo in geodezijo
UDC: 556.5:626.8(282)(497.4)
COBISS: 7377249 Link will open in a new window
ISSN: 0352-3551
Views: 2571
Downloads: 686
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Other data

Secondary language: English
Secondary title: Impact of the river gate on the Ambrož square on the temperature and oxygen conditions in the Ljubljanica river
Secondary abstract: The aim of the project Ljubljanica connects is to improve the habitat conditions of endangered fish species in the Ljubljanica River. Adequate living conditions in addition to river connectivity depend, among other things, on the physical and chemical characteristics of water (e.g. temperature, concentration of dissolved oxygen), which are monitored by continuous measurements. In this paper we analysed the measured parameters from two measuring stations, above and under the river gate on the Ambrož Square in Ljubljana. We analysed the data for water temperature and dissolved oxygen concentrations. For the measurement period between January 2013 and August 2014 we calculated the average monthly values of the two analysed parameters, calculated their interdependence and dependence of water temperature and air temperature. We verified the impact of the river gate on Ambrož Square on the concentration of dissolved oxygen under the gate. We found that the average monthly values of dissolved oxygen concentration above the gate are lower than concentrations under the gate for most of the analysed period. This shows the impact of turbulent flow under the gate. High negative linear correlation was observed between water temperature and dissolved oxygen concentration, while between air temperature and water temperature the linear correlation was highly positive. We note also that in the area of the gate, oxygen and temperature conditions are favourable for life of targeted fish species. With continuous measurements of water quality parameters at 17 monitoring sites along the Ljubljanica River we will be able to obtain a larger dataset.
Secondary keywords: Ljubljanica connects;dissolved oxygen;water temperature;correlation;water level;
URN: URN:NBN:SI
File type: application/pdf
Type (COBISS): Not categorized
Pages: str. 85-102
Volume: 27
Issue: ǂ[št.] ǂ47
Chronology: 2014
ID: 9150293