Ocena vpliva prelivajoče vode, dela kanalizacijskega s istema Črnomlja, v reko Dobličico : diplomska naloga

Fortun, Uroš (author), Panjan, Jože (mentor), Krzyk, Mario (comentor)

Diplomska naloga obravnava prvi val onesnaženja. Opisane so definicije pojava prvega vala, opisana je metoda za določitev srednje koncentracije onesnažil in podan je postopek za določitev razmerja masnega prvega vala, s katerim določimo, koliko mase posameznega onesnažila se je izločilo v delu odtoka v odvisnosti od časa. V drugem delu je predstavljen program SWMM (Storm Water Management Model). Tretji del naloge obravnava rezultate meritev vzorcev, ki so bili pridobljeni na Viču v Ljubljani. Analiza je potekala v vseh letnih časih in je vsebovala dvajset parametrov. V četrtem delu je prikazan rezultat analize vzorcev preliva na razbremenilnem objektu v Črnomlju in vpliv prelite vode na kakovost Dobličice. Z rezultati analize sem kalibriral model v SWMM ter s tako pripravljenim modelom simuliral nihanje koncentracij onesnaževal v odvisnosti od časa. Določil sem maso izpranih onesnažil v realnem padavinskem dogodku dne 21. 11. 2015, v katerem je po dvajsetih sušnih dnevih padlo 20 milimetrov padavin. Z rezultati simulacije sem določil srednjo koncentracijo onesnažil in količino mase izpranega onesnažila v odvisnosti od volumenskega odtoka. Ugotovljeno je bilo, da bi v primeru pravilnega delovanja razbremenilnega in zadrževalnega bazena zmanjšali izpuste posameznega onesnažila tudi za 70 %. Model sem uporabil še za simulacijo padavinskega dogodka s trajanjem 30 minut in povratno dobo enega leta. Prikazana je primerjava med 20- in 50-dnevnim sušnim obdobjem.

• Language: Slovenian
• Keywords: gradbeništvo, diplomska naloga, UNI, VKI, prvi val onesnaženja, preliv, program SWMM, koncentracija onesnaževal, kalibracija, reka Dobličica, Črnomelj
• Work type: Undergraduate thesis
• Typology: 2.11 - Undergraduate Thesis
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Place of publishing: Ljubljana
• Publisher: [U. Fortun]
• Year: 2016
• Number of pages: XII, 108 str., 6 pril.
• PID: 20.500.12556/RUL-81516
• COBISS.SI-ID: 7453281
• Publication date in RUL: 29.04.2016

Secondary language

• Language: English
• Title: Assessing the impact of overflow water, a part of the Črnomelj sewerage system, into the Dobličica river

Abstract

The thesis deals with the first flush phenomenon. Given are the definitions of the first flush, the method for defining the event mean concentration and the procedure of defining mass first flush ratio, which gives us the quantity of the mass of emitted pollutants, as a function of the storm progress indicated by the normalized runoff volume. The second part describes programme SWMM (Storm Water Management Model). The third part represents the results of measurements which took place at Vič in Ljubljana. The analysis took place in all seasons and it contained twenty parameters. The fourth part shows results of measurements on the stormwater overflow in Črnomelj and the influence of overflow water on the quality of the Dobličica river. I used the results for calibration of the model in SWMM. With that model, I simulated the oscillation of the pollutants over time. I defined the mass of wash-off pollutants in the rainfall event of 21 November 2015 in which there were 20 millimetres of rainfall after 20 droughty days. With the results of simulation, I determined the event mean concentration and the amount of mass emission in relation to cumulative flow volume. It was found that if the stormwater overflow and stormwater holding tank worked correctly, pollution would be reduced by 70%. I also used the calibrated model in simulating the rainfall event with duration of 30 minutes and one-year return period. Simulation was set with 20-day and 50-day dry period.

• Keywords: graduation thesis, civil engineering, first flush, overflow, programme SWMM, pollutant concentration, calibration, stream Dobličica, Črnomelj