Assessment of Soil Saturated Hydraulic Conductivity at VFSTR Campus Using DRI Method
Procena hidrauličke provodljivosti zemljišta na VFSTR kampusu upotrebom metode DRI
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Author
Islam, Aminul
Chandra Charyulu, Ravi
Reddy, Rami
Keywords
hydraulic conductivityinfiltration rate
precipitation
Green-Ampt (G-A)
Double Ring Infiltrometer (DRI)
hidraulička provodljivost
procenat infiltracije
padavine
model Green-Ampt (G-A)
dvostruki kružni infiltrometar (DRI)
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Study of soil hydraulc conductivity is the most important parameter for fluid flow and molecules transportation phenomena through the soil profile. The water reaches in the land surface in the form of precipitation and irrigation can flow over the ground, which eventually reaches in surface water body and flows through soil surface, contributes groundwater recharge. Estimation and evaluation of soil saturated hydraulic conductivity (Ks) are soil hydraulic properties that effect fluid flow ability through the soil medium which help to understand transmission properties and water balance in soils. The Green-Ampt (GA) model is best suited for infiltration on homogeneous, initially dry, rough and rough soils. The study is conducted to estimate steady state infiltration rate by using in-situ method named Double Ring Infiltrometer (DRI) and finding the spatial variation of infiltration rate and to estimate saturated hydraulic conductivity by using the Green-Ampt (G-A) model for 6 plots, having area 15m x 15m each at Vadlamudi willage, Guntur district, Andhra Pradesh (India). The experiment conducted areas A1, A2, A6 is having more bulk density because of organic compounds in that area having comparatively less infiltration rate than A3, A4, A5. Point A1 having less moisture content with soil bulk density 1.95 g/cm3 and having a maximum infiltration rate of 4.2 cm/h. The average estimated Ks was found 0.95 cm/h from the experiment plot. Istraživanje hidraulične provodljivosti zemljišta najvažniji je parametar za protok tečnosti i transport molekula kroz profil zemljišta. Voda dospeva na površinu zemljišta u obliku padavina, navodnjavanjem i može prolaziti kroz profil zemljišta, i na kraju dospeva u veće dubine i formira različite forme podzemne vode. Procena hidrauličke provodljivosti zasićenog zemljišta (Ks) je hidraulička osobina zemljišta koja utiče na sposobnost prolaska kroz podzemnu sredinu i pomaže u razumievanju osobina prenosa i ravnoteže vode u zemljištima. Model Green-Ampt (G-A) je najprikladniji za infiltraciju na homogenim, u početku suvim i grubim zemljištima.
Studija je sprovedena za procenu procenta infiltracije kroz zemljište korišćenjem in-situ metode Double Ring Infiltrometer (DRI) i određivanjem prostorne varijacije brzine infiltracije i procenom hidrauličke provodljivosti pomoću modela Green-Ampt (GA) za 6 oglednih površine od 15m x15m, svaki kod mesta Vadlamudi, okrug Guntur, Andhra Pradesh (India).
Eksperiment obuhvata površine A1, A2, A6 koje imaju veću vrednost zapreminske težine zemljišta zbog sadržaja organskih jedinjenja u toj oblasti, i koja imaju relativno manji rang infiltracije od površine A3, A4, A5.
Površina A1 sa manjim sadržajem vlage i vrednosti zapreminske težine zemljišta od 1,95 g/cm3 imaju maksimalnu brzinu infiltracije od 4,2 cm/h. Prosečno određena vrednost Ks sa eksperimentalnog polja je 0,95 cm/h.