Masna bilanca nitratnega dušika v porečju potoka Padež : diplomska naloga

Česnik, Katarina (author), Rusjan, Simon (mentor), Mikoš, Matjaž (comentor)

Diplomska naloga obravnava spremembe masne bilance nitratnega dušika na gozdnatih prispevnih območjih. Le-te nastanejo pod vplivom hidroloških in biogeokemijskih mehanizmov. Območje obravnave, prispevno območje potoka Padež je skoraj v celoti prekrito z gozdom. Med leti 2006 in 2007 so se zvezno spremljale hidrometeorološke razmere in potekale meritve kemizma vode in velikosti pretokov potoka Padež. S pomočjo podatkov o spremembah koncentracij nitratnega dušika v vodotoku in padavinah ter podatkov o letnih količinah padavin na območju porečja in letnih pretokih potoka Padež, smo opredelili masno bilanco nitratnega dušika. Podana je kot razlika med količino vnesenega in izpranega nitratnega dušika na hektar prispevne površine. V spremenljivosti masne bilance so opazni sezonski vplivi. Porečje nekaj časa deluje kot izvor in nekaj časa kot ponor za nitratni dušik, odvisno od hidroloških razmer in količin mobilnega nitratnega dušika v sistemu tal in njegovih koncentracij v padavinah. Nadalje smo poskušali napovedati, kako bodo predvidene spremembe v okolju vplivale na biogeokemijsko kroženje duška in gibanje masne bilance na gozdnatih prispevnih območjih.

• Language: Slovenian
• Keywords: gradbeništvo, diplomska naloga, UNI, VKI, hidrologija, biogeokemija, masna bilanca, atmosferski vnos, porečje Padež
• Work type: Undergraduate thesis
• Typology: 2.11 - Undergraduate Thesis
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Place of publishing: Ljubljana
• Publisher: K. Česnik
• Year: 2014
• Number of pages: XXII, 66 str.
• PID: 20.500.12556/RUL-32305
• UDC: 556.5(497.4)(043.2)
• COBISS.SI-ID: 6633313
• Publication date in RUL: 10.07.2015

Secondary language

• Language: English
• Title: Nitrate mass balance in the Padež stream watershed

Abstract

Graduation thesis analyzes changes in nitrate mass balance in a forested watersheds. The nitrate mass balance changes occur manly because of hydrological and biogeochemical mechanisms. The studied area, the Padež stream watershed, is mainly covered with forest. Between years 2006 and 2007 the hydrometeorological conditions and streamwater chemistry of Padež stream were continuously monitored. The differences in streamwater nitrate concentrations and nitrate concentrations in precipitations and measurements of precipitations and Padež stream discharge helped us to calculated nitrate mass balance. Mass balance is analysed as a difference between inputs and outputs of nitrate per hectare of catchment area. The seasonal differences in mass balance were observed. Watershed behaves as a sink or as a source of nitrate depending on hydrological conditions and amount of mobile nitrate in soil and its concentrations in precipitations. We also try to describe the impact of global environmental changes on biogeochemical cycling of nitrate and variations in its mass balance in forested catchments.

• Keywords: graduation thesis, civil engineering, hydrology, biogeochemistry, mass balance, atmospheric deposition, the Padež stream watershead