Meritve infiltracije in vodoodbojnosti na različnih tipih tal

diplomska naloga

Rožle Lavrač (Author), Mojca Šraj (Mentor), Mitja Brilly (Thesis defence commission member), Mitja Brilly (Co-mentor)

Abstract

Keywords

gradbeništvo;diplomska dela;UNI;B-VKI;infiltracija;vodoobstojnost;meritve;WDPT;infiltrometer z dvojnim obročem;minidisk infiltrometer;količnik hidravlične prevodnosti;

Data

Language:	Slovenian
Year of publishing:	2012
Source:	Ljubljana
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FGG - Faculty of Civil and Geodetic Engineering
Publisher:	[R. Lavrač]
UDC:	556.14(043.2)
COBISS:	5966945
Views:	2279
Downloads:	953
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Measurements of infiltration and water repellency on different soils
Secondary abstract:	Infiltration is a process of water entering soil from its surface. Field measurements of infiltration are performed with infiltrometers. Calculation of hydraulic conductivity can be done by different equations. Infiltration exhibits large spatial and temporal variability due to many affecting factors. One of those effects is soil water repellency (hydrophobicity). Water-repellent soils do not wet up spontaneously. The intensity and persistence of water repellency vary widely due to variability in individual or combined effects of environment. The objective of the research study was to measure infiltration and water repellency of three different soils and two different land uses with different methods. The results were then compared with each other and with the results of other scientist. The infiltration was measured with mini disk infiltrometer and double ring infiltrometer. Water repellancy was determined by the water drop penetration time (WDPT) and a relatively new method with mini disk infiltrometer (MDI). Field measurments were performed on experimental watershed of Glinščica river in summer of 2012. Comparing the results of measurements under both vegetation covers, infiltration on soil under grass was higher than on soil covered with forest. Different calculation methods of hydraulic conductivity gave different results. Repellency was determined in surface samples of all tree soils of different textural types. Repellency level was much higher for soils under forest than on soils under grass. The analysis of the results showed significant correlation between infiltration and repellency.
Secondary keywords:	graduation thesis;civil engineering;infiltration;soil water repellency;measurements;safety;WDPT;double ring infiltrometer;MDI infiltrometer;hydraulic conductivity;
File type:	application/pdf
Type (COBISS):	Bachelor thesis/paper
Thesis comment:	Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Pages:	XII, 68 str.
Type (ePrints):	thesis
Title (ePrints):	Measurements of infiltration and water repellency on different soils
Keywords (ePrints):	infiltracija;vodoodbojnost;meritve;WDPT;infiltrometer z dvojnim obročem;minidisk infiltrometer;količnik hidravlične prevodnosti
Keywords (ePrints, secondary language):	infiltration;soil water repellency;measurements;WDPT;double ring infiltrometer;MDI infiltrometer;hydraulic conductivity
Abstract (ePrints):	Infiltracija je proces vstopanja vode v tla skozi površinski sloj tal. Meritve infiltracije na terenu izvajamo z infiltrometri. Za izračun količnika hidravlične prevodnosti na osnovi meritev pa lahko uporabimo različne metode. Infiltracija je odvisna od številnih vplivov. V nalogi smo posebno pozornost namenili vodoodbojnosti tal, ki predstavlja pojav odbijanja vode od površine in je prav tako odvisna od mnogih okoljskih vplivov. Cilj naloge je bil izvesti meritve infiltracije na treh tipih zemljin in dveh različnih rabah tal, analizirati rezultate ter jih primerjati s študijami drugih raziskovalcev. Meritve infiltracije smo izvedli z mini disk infiltrometrom (MDI) in infiltrometrom z dvojnim obročem (DRI). Drugi cilj naloge je bil opisati in izmeriti vododbojnost tal z testom vpijanja vodne kapljice v tla (WDPT) in novejšo metodo z uporabo minidisk infiltrometra (MDI). Z analizo rezultatov pa vse meritve med seboj primerjati in ugotoviti odvisnosti (korelacije). Meritve so bile izvedene na eksperimentalnem področju Glinščice na treh različnih tipih tal in dveh rabah tal v poletnem obdobju 2012. Rezultati meritev so pokazali, da je infiltracija na travniku višja kot v gozdu na vseh treh tipih zemljin. Izračunani količnik hidravlične prevodnosti se z uporabo različnih metod razlikuje. Vodoodbojnost je bila določena na vseh treh tipih tal različnih teksturnih razredov in je bila dosti višja v gozdu, kakor na travniku. Analiza rezultatov je pokazala tesno korelacijo med vodoodbojnostjo in infiltracijo.
Abstract (ePrints, secondary language):	Infiltration is a process of water entering soil from its surface. Field measurements of infiltration are performed with infiltrometers. Calculation of hydraulic conductivity can be done by different equations. Infiltration exhibits large spatial and temporal variability due to many affecting factors. One of those effects is soil water repellency (hydrophobicity). Water-repellent soils do not wet up spontaneously. The intensity and persistence of water repellency vary widely due to variability in individual or combined effects of environment. The objective of the research study was to measure infiltration and water repellency of three different soils and two different land uses with different methods. The results were then compared with each other and with the results of other scientist. The infiltration was measured with mini disk infiltrometer and double ring infiltrometer. Water repellancy was determined by the water drop penetration time (WDPT) and a relatively new method with mini disk infiltrometer (MDI). Field measurments were performed on experimental watershed of Glinščica river in summer of 2012. Comparing the results of measurements under both vegetation covers, infiltration on soil under grass was higher than on soil covered with forest. Different calculation methods of hydraulic conductivity gave different results. Repellency was determined in surface samples of all tree soils of different textural types. Repellency level was much higher for soils under forest than on soils under grass. The analysis of the results showed significant correlation between infiltration and repellency.
Keywords (ePrints, secondary language):	infiltration;soil water repellency;measurements;WDPT;double ring infiltrometer;MDI infiltrometer;hydraulic conductivity
ID:	8312556