Meritve vodoodbojnosti in infiltracije tal

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Language:	Slovenian
Year of publishing:	2013
Source:	Ljubljana
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FGG - Faculty of Civil and Geodetic Engineering
Publisher:	[P. Žnidaršič]
UDC:	556.536(043.2)
COBISS:	6400865
Views:	2382
Downloads:	772
Average score:	0 (0 votes)
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Secondary language:	English
Secondary title:	Measurements of water repellency and infiltration of the soil
Secondary abstract:	Soil water repellency is a reduction in the rate of wetting caused by the presence of hydrophobic coatings on soil particles. The occurrence of the absorption of water from the surface of the ground in its interior is called infiltration. Water resistance and infiltration are dependent on a number of influences. All measurements were done on three different soil types at each at the ground level and in the trench. Water repellency measurements were performed by two methods, namely with water drop penetration time test (WDPT) and with mini disk infiltrometer (MDI). While performing WDPT we measured time that takes a drop of water to be absorbed into the ground, but with MDI we measured the volume of water which infiltrated in 60 s at suction -1 cm. We had also done measurements of infiltration with MDI and then we determined the ratio of soil hydraulic conductivity for each soil type. This ratio is an important parameter of permeability of the soil. On the basis of the measurement results, we found out that the water repellency and infiltration change with depth. On all soil types has been observed less infiltration and increased water repellency in the trench than at ground level. We found a strong correlation between the WDPT and MDI measurements of water repellency and a good correlation between the measurements of water repellency and infiltration. Confirm the regularity of our measurements, we find in the literature, as well as other researchers obtained results comparable to our own.
Secondary keywords:	water repellency;infiltration;hydraulic conductivity;water drop penetration time;mini disk infiltrometer;measurements
File type:	application/pdf
Type (COBISS):	Bachelor thesis/paper
Thesis comment:	Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Pages:	XII, 35 str., [4] f. pril.
Type (ePrints):	thesis
Title (ePrints):	Measurements of water repellency and infiltration of the soil
Keywords (ePrints):	vodoodbojnost;infiltracija;količnik hidravlične prevodnosti;meritve;test vpijanja vodne kapljice v tla;mini disk infiltrometer
Keywords (ePrints, secondary language):	water repellency;infiltration;hydraulic conductivity;water drop penetration time;mini disk infiltrometer;measurements
Abstract (ePrints):	Vodoodbojnost je zmanjšanje stopnje močenja tal, zaradi prisotnosti hidrofobnih delcev v tleh. Pojav vpijanja vode s površine tal v njeno notranjost imenujemo infiltracija. Tako vodoodbojnost kot infiltracija sta odvisna od več vplivov. Vse meritve smo izvedli na treh različnih tipih tal, na vsakem v nivoju tal in v vkopu. Meritve vodoodbojnosti smo opravili z dvema metodama, in sicer s testom vpijanja vodne kapljice v tla (WDPT) ter z mini disk infiltrometrom (MDI). Pri WDPT se meri čas, potreben da se kapljica vpije v tla, pri MDI metodi pa volumen infiltrirane vode v času 60 s ter pri srku -1 cm. Z MDI smo izvedli tudi meritve infiltracije, na podlagi katerih smo določili količnik hidravlične prevodnosti tal, ki je pomemben parameter prepustnosti zemljine. Na podlagi rezultatov meritev smo ugotovili, da se tako vodoodbojnost kot tudi infiltracija z globino meritve spreminjata. Na vseh tipih tal je bilo namreč opaziti manjšo infiltracijo in večjo vodoodbojnost v vkopu kot v nivoju tal. Ugotovili smo močno korelacijo med obema meritvama vodoodbojnosti ter dobro korelacijo med meritvami vodoodbojnosti in infiltracije. Potrditev pravilnosti naših meritev smo poiskali v literaturi, saj so tudi drugi raziskovalci z meritvami pridobili rezultate primerljive našim.
Abstract (ePrints, secondary language):	Soil water repellency is a reduction in the rate of wetting caused by the presence of hydrophobic coatings on soil particles. The occurrence of the absorption of water from the surface of the ground in its interior is called infiltration. Water resistance and infiltration are dependent on a number of influences. All measurements were done on three different soil types at each at the ground level and in the trench. Water repellency measurements were performed by two methods, namely with water drop penetration time test (WDPT) and with mini disk infiltrometer (MDI). While performing WDPT we measured time that takes a drop of water to be absorbed into the ground, but with MDI we measured the volume of water which infiltrated in 60 s at suction -1 cm. We had also done measurements of infiltration with MDI and then we determined the ratio of soil hydraulic conductivity for each soil type. This ratio is an important parameter of permeability of the soil. On the basis of the measurement results, we found out that the water repellency and infiltration change with depth. On all soil types has been observed less infiltration and increased water repellency in the trench than at ground level. We found a strong correlation between the WDPT and MDI measurements of water repellency and a good correlation between the measurements of water repellency and infiltration. Confirm the regularity of our measurements, we find in the literature, as well as other researchers obtained results comparable to our own.
Keywords (ePrints, secondary language):	water repellency;infiltration;hydraulic conductivity;water drop penetration time;mini disk infiltrometer;measurements
ID:	8312910