Metode ocenjevanja kemijskega stanja podzemne vode na primeru Pomurja : magistrsko delo

Gacin, Marina (author), Brenčič, Mihael (mentor)

Kvartarni vodonosniki na obmo%ju Pomurja so med najbolj ranljivimi in onesnaţenimi v Sloveniji. Na ranljivost in onesnaţenost vodonosnikov poleg %lovekovih vplivov v veliki meri vpliva tudi geološka zgradba. V magistrski nalogi sem na primeru Pomurja izvedla univariatne in bivariatne statisti%ne analize, geostatisti%no analizo ter ocenila kemijsko stanje podzemne vode. Statisti%no sem analizirala spremenljivke vodnega kroga za obdobje 1992-2008. Geostatisti%na analiza temelji na debelinah in litologiji slabše prepustnih plasti, ki leţijo na dobro prepustnem kvartarnem vodonosnem peš%eno prodnatem zasipu reke Mure in njenih pritokov. Rezultati kaţejo, da imajo vrhnje slabše prepustne plasti velik vpliv na onesnaţenje vodonosnikov v Pomurju. Vplivajo na variabilnost spremenljivk, na njihove medsebojne odnose in na kemijsko stanje podzemne vode. Najbolj variabilne so spremenljivke, ki opisujejo kakovost podzemne vode. Debeline in litološke zna%ilnosti vrhnjih slabše prepustnih plasti narekujejo hidrodinami%ne zna%ilnosti vodonosnika. Odprti vodonosnik, ki v osrednjem delu Pomurja prehaja v polzaprtega je najbolj ranljiv in onesnaţen. Na fizi%nih mejah je polzaprti vodonosnik manj ranljiv in manj onesnaţen, debeline vrhnjih slabše prepustnih plasti so ve%je. Analiza linearnih trendov je za obravnavano obdobje pokazala, da se vsebnosti onesnaţeval zniţujejo, kemijsko stanje podzemne vode v Pomurju se izboljšuje.

• Language: Slovenian
• Keywords: Pomurje, vodonosniki, vrhnje slabše prepustne plasti, podzemna voda, onesnaženje, kemijsko stanje
• Work type: Master's thesis
• Typology: 2.09 - Master's Thesis
• Organization: NTF - Faculty of Natural Sciences and Engineering
• Place of publishing: Ljubljana
• Publisher: [M. Gacin]
• Year: 2015
• Number of pages: XVIII, 102 f., pril.
• PID: 20.500.12556/RUL-76611
• UDC: 55
• COBISS.SI-ID: 1235038
• Publication date in RUL: 28.12.2015

Secondary language

• Language: English
• Title: Methods for assessing the chemical status of groundwater in the Pomurje region

Abstract

The quaternary aquifers in the Pomurje region are among the most vulnerable and polluted in Slovenia. In addition to human impact, the vulnerability and pollution of aquifers depend on the geological composition. In the master's thesis, univariate and bivariate statistical and geostatistical analyses were used and the chemical status of groundwater was assessed in the Pomurje region. Data on water cycle variables for the period 1992-2008 were statistically analysed and evaluated. The geostatistical analysis was based on the thicknesses and lithology of low permeable layers, which lie on the quaternary sandy -gravely highly permeable aquifer, deposited by the Mura river and its tributaries. The results indicate that upper low - permeable layers have a great impact on the pollution of aquifers in the Pomurje region. They affect the variability of variables, relationships between them, and the chemical status of groundwater. Variables of groundwater quality show higher variety. The thicknesses and lithological characteristics of these layers dictate the hydrodynamic characteristics of the aquifer. Unconfined aquifer, which is transitioning into leaky aquifer, is the most vulnerable and polluted in the central part of Pomurje region. On the aquifer's lateral boundaries upper low - permeable layers are thicker. The extent of groundwater pollution is reduced, concentrations of pollutants are lower. The analysis of linear trends has shown that pollutants concentrations are decreasing for observed period, and the chemical status of groundwater in the Pomurje is improving.