Vrednotenje premeščanja sedimentov na podlagi podatkov o zapolnjenosti hudourniških pregrad : diplomska naloga

Prezelj, Luka (author), Bezak, Nejc (mentor), Sodnik, Jošt (co-mentor)

Rečni transport materiala je proces, ki je stalno prisoten v vodotokih. Prisotnost tega procesa je posledica energije vodnega toka, pa tudi erozije, ki predstavlja vir materiala, ki se premešča v vodotokih. Prisotnost plavin v vodotoku vpliva na spreminjanje njegovih lastnosti in oblike, njihove posledice se na primer kažejo v spremembah rečne struge in pokrajine ter zapolnjevanju akumulacijskih pregrad. Poznavanje količin transporta materiala v vodotoku ima tako pomembno vlogo pri razumevanju naravnih procesov v vodotoku. V diplomski nalogi obravnavamo dinamiko premeščanja sedimentov v hudournikih na območju Save Dolinke. Na podlagi zapolnjenosti in projektnih volumnov zaplavnih pregrad na hudourniških pritokih Save Dolinke skušamo oceniti količine materiala, ki se premeščajo v strugah teh hudournikov. S pomočjo primerjave lastnosti prispevnih območij vodotokov s premeščanjem sedimentov v njih skušamo ugotoviti kateri dejavniki imajo največji vpliv na količino transporta sedimentov v strugah hudournikov. Cilj diplomske naloge je nadgraditi razumevanje dinamike transporta sedimentov in določiti bilance transporta sedimentov za posamezne pritoke Save Dolinke, ter ugotoviti kateri dejavniki imajo na transport sedimentov največji vpliv. Na podlagi analize v diplomski nalogi je ocenjeno, da se v strugah hudourniških vodotokov na območju Save Dolinke letno povprečno premesti 547 m3 rinjenih plavin oziroma 2,15 m3 rinjenih plavin na hektar prispevnega območja. Po ugotovitvah diplomske naloge imajo na transport sedimentov najizrazitejši vpliv lastnosti padavin in njihova erozivnost, ter pokrovnost tal.

• Language: Slovenian
• Keywords: hudourniške pregrade, rinjene plavine, lebdeče plavine, transport, bilanca, erozijski procesi, vplivni dejavniki, RUSLE, Meltonovo število
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Place of publishing: Ljubljana
• Publisher: [L. Prezelj]
• Year: 2021
• PID: 20.500.12556/RUL-130417
• UDC: 627.82(043.2)
• COBISS.SI-ID: 77371651
• Publication date in RUL: 15.09.2021

Secondary language

• Language: English
• Title: Estimation of the sediment transport based on volume of sediment retained by check dams : graduation thesis

Abstract

River transport of material is a process that is constantly present in watercourses. Its presence is due to the energy of the water flow, as well as erosion. The presence of sediments in the watercourse changes its characteristics and shape, which can be seen in changes of the riverbed and landscape. Knowledge about the amount of sediment transport in a watercourse has an important role in understanding its natural processes. In the graduation thesis, we discuss the dynamics of sediment transport in torrents located in Sava Dolinka river catchment. Based on the volume of retained sediments and design volumes of check dams, we try to estimate the quantities of material that is transported by these torrents. By comparing the properties of watercourses’ drainage catchments with the transport of sediments in them, we try to determine which factors impact the rate of sediment transport. The aim of the graduation thesis is to improve the understanding of sediment transport dynamics and to determine transport rates for individual torrents, as well as investigation which factors have the greatest impact on the sediment transport. Based on the analysis conducted in the scope of the thesis, it is estimated, that an average of 547 m3 of sediments or 2,15 m3/ha of catchment area are transported annually in the torrents located in this territory. The erosivity of the precipitation and soil cover are indicated as two most dominant factors.

• Keywords: Estimation of the sediment transport based on volume of sediment retained by check dams