SPATIAL VARIABILITY OF HYDRAULIC CONDUCTIVITY OF SATURATED SOIL IN CONSERVATION UNIT

Glaucia Machado Mesquita,Felipe Corrêa Veloso Dos Santos,Vladia Correchel,Anne Louise Dores

doi:10.32404/rean.v9i1.6532

Glaucia Machado Mesquita, Felipe Corrêa Veloso Dos Santos + Show 2 more

Open Access

https://doi.org/10.32404/rean.v9i1.6532

Copy DOI

Abstract

The study aimed to evaluate the hydraulic conductivity using soil samples with undisturbed structure in the soil layers of 0-5, 5-10, 10-20, and 20-40 cm; 120 soil samples were collected. For the determination of hydraulic conductivity, the constant load permeameter was used. For geostatistical analysis, exploratory data analysis was performed using frequency histograms, determining the main measures of position and dispersion, verifying the trends for the construction of boxplot graphics, which allows the identification of discrepant points. The lowest and highest hydraulic conductivity values were found in the 20-40 cm and 0-5 cm soil layers, respectively; values commonly found in soils under forest conditions. Based on the results, we conclude when the soil sampling for analysis of hydraulic conductivity is random, the minimum distance between the points must be greater than 15.5 m.

Highlights

The hydraulic conductivity of the soil is a property that expresses the ease with which the water moves in it, being extremely important to agricultural use and, to the production of crops and the preservation of the soil and the environment (Gonçalves and Libardi, 2013)
Hydraulic conductivity corresponds to the permeability of the soil to allow water to flow between its empty spaces
The highest value was 407.44 mm h-1 in the 20-40 cm soil layer, the lowest conductivity value was obtained, while the largest was found in the 0-5 cm depth

Summary

Introduction

The hydraulic conductivity of the soil is a property that expresses the ease with which the water moves in it, being extremely important to agricultural use and, to the production of crops and the preservation of the soil and the environment (Gonçalves and Libardi, 2013). Depending on the percolation intensity of the subsoil water, the permeability of soil can be classified. Guerra (2018) reports that vegetation is a crucial factor for soil maintenance and, directly influences water infiltration. In this matter, conservation units or reference forests have significant importance as an indicator of soil physical quality. Conservation units or reference forests have significant importance as an indicator of soil physical quality The loss of this quality directly affects the porous space of the soil, impairing the supply of water and oxygen, limiting the development of plants and the activity of organisms in the soil (Tormena et al, 1998)

Methods

Results

Conclusion