A METHOD TO ANALYZE THE HYDRAULIC CONDUCTIVITY OF WATER INFILTRTION INTO TWO LAYERED SOIL WITH HIDRUS 2D/3D
ABSTRACT: A method was
proposed to analyzed two dimension hydraulic conductivity of water infiltration
into layered soil consist of Manado soil over sand bentonite (5%) soil with
HYDRUS software 2D/3D. The Manado soil (loamy sand) was classified with USDA
soil standard. Sand Bentonite (5%) was analyzed with Soil Water Characteristic
Curve (SWCC) and by using van Genuchten formula to analyze the properties of
soil such as residual water content (θr), saturated water content (θs), fitting
parameter n,l and α. HYDRUS software 2D/3D was used to compute the two
dimensional of water infiltration into a vertical column 1cm x 100cm of two
layered soil consist of Manado soil over
sand- bentonite(5%) soil. Pounded infiltration is in-itiated with a zero
pressure head at the soil surface, while free drainage is used at the bottom of
soil profile. The water infiltra-tion into the soil was measured for fifty
days. The change of water content (θ), pressure head (H) and hydraulic
conductivity (K) along the fifty days (time) were measured for each of soil at
observation depth N-80cm and N-20cm of vertical column layered two soil . A
method (fitting curve line) was applied to the relationship between hydraulic
conductivity and pressure head as well as hydraulic conductivity and water
content which is computed with HYDRUS 2D/3D software. The fitting line curve
equation was proposed as a new method to analyze the hydraulic conductivity (K)
of two layered soil consist of Mana-do soil and sand Bentonite (5%) soil in a
vertical soil collumn.
Author: Fabian Johanes Manoppo
Journal Code: jptsipilgg120012
