Hydraulic Conductivity in Soils - Essay Example

Comments (0) Cite this document
This essay describes that Bi-modal soils are the soils that have structural and matrix porosity. In these bi-modal soils there is a model for water retention which is developed into other models. Such a change ensures there is an incorporation of the existing effects of macro-pores…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER92.4% of users find it useful
Hydraulic Conductivity in Soils
Read TextPreview

Extract of sample "Hydraulic Conductivity in Soils"

Hydraulic Conductivity in Soils Hydraulic Conductivity in Soils Bi-modal soils are the soils that have structural and matrix porosity (Dexter & Richard, 2009). In these bi-modal soils there is a model for water retention which is developed into other models such as the tri-modal soils (Dexter & Richard, 2009). Such a change ensures there is an incorporation of the existing effects of macro-pores. Additionally, the bi-modal soil model has its basis on the idea of water retention function of the exponential Boltzmann. Researchers also believe that the model can also extend to include other numbers such as the “n” of the modes of porosity. These modes exist because the soil structure is usually hierarchical. It is also used together with other models to produce a model that promotes a saturated hydraulic conductivity. These are the hydraulic conductivity models such as the Marshall’s pore model. It also produces a K-sat and that of the n-modal soils (Dexter & Richard, 2009). For such reasons, the n-modal soils tend to give a simple equation. Hence, with a simple K-sat expression, it is easy to come up with a scale for the soil’s porosity and its pore size distribution.
A Polish data set is useful in illustrating this model (Dexter & Richard, 2009). To make an estimate of the limit of a macro-pore term, it is essential to use the measure values of curves obtained when there is water retention. It also involves using other measured values obtained from identifying the bulk density and K-sat. Additionally, for the 42 Polish arable soils there are distributions and mean values of macro pore limits (Dexter & Richard, 2009). However, having such macro pore limits does not guarantee there will be hydraulic conductivity in the soil. For example, these parameters are usually found in fields during a harvest and in most cases they do not lead to hydraulic conductivity. In the field, water movement occurs through the use of structural pores. The flow of water also goes through macro-pore spaces which are prevalent in soil that is freshly plowed.
To determine the value of saturated hydraulic conductivity in soils, there are different scenarios to look at. One of the scenarios is that in theory it is known that soil tends to become dense when there is a decrease in structural pores (Dexter & Richard, 2009). However, this is not determined during observations. This leads to the conclusion that it is the number of structural pores in the soil that determines the density and not their size. The multi-modal nature of the soil’s pore size distribution is the key determining factor of the soil’s water retention levels and the value of saturated hydraulic conductivity. Therefore, this improves our understanding of the soil’s structure and function because of the ability to make physical predictions of its hydraulic characteristics.

Dexter, A., & Richard, G. (2009). The saturated hydraulic conductivity of soils with n-modal pore size distributions. Journal of Geoderma, 154(1-2), 76-85 doi:10.1016/j.geoderma.2009.09.015 Read More
Cite this document
  • APA
  • MLA
(“Hydraulic Conductivity in Soils Essay Example | Topics and Well Written Essays - 500 words”, n.d.)
Hydraulic Conductivity in Soils Essay Example | Topics and Well Written Essays - 500 words. Retrieved from
(Hydraulic Conductivity in Soils Essay Example | Topics and Well Written Essays - 500 Words)
Hydraulic Conductivity in Soils Essay Example | Topics and Well Written Essays - 500 Words.
“Hydraulic Conductivity in Soils Essay Example | Topics and Well Written Essays - 500 Words”, n.d.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document

CHECK THESE SAMPLES OF Hydraulic Conductivity in Soils

Radiation and Thermal Conductivity

...?Summary The essence of the experiment was to establish the general characteristics governing thermal radiation and thermal conductivity. The experiment was divided into four parts in order to conduct studies related to these characteristics. The set up for the first experiment involved a radiometer and an emitter and the general realization was that a direct proportionality between heat influx from the emitter and the view factor and energy transmitter. The second experiment was aimed at looking at how the intensity of radiation varied with distance. The general realization was that there existed an inverse proportionality between the intensity of radiation and the square of the distance covered by the radiation from the source... of the...
7 Pages(1750 words)Lab Report


...conducted gas fracturing within Lancashire. However, when earthquakes occurred within this area, the ban was introduced. In other places within South America, hydraulic fracturing has not yet been exploited. However, it is believed that countries such as Brazil could enhance their economy by undertaking in this mining process Economic Impact of Hydraulic Fracturing Hydraulic fracturing enhances economic growth in various ways. One, having Shale gas and oil makes a country to be more energy independent (“Presidents Economic Report for 2012”, pg 256 2012). Consequently, such a country will reduce the amount of expenditure incurred in importing oil. Similarly, when mining...
5 Pages(1250 words)Essay

Hydraulic conductivity

...? Hydraulic conductivity and Hydraulic conductivity Introduction Hydraulic conductivity is the simplicity of water movement, through fractures and porous spaces in rocks or soil, and the level is determined through the computation of the location’s hydraulic gradient and the conditioning of the permeability, as well as the saturation of the material. Hydraulic conductivity is universally determined through an empirical approach, which entails correlating hydraulic conductivity to the properties of the soil. It is also determined through an experimentation process, entailing the calculation of the level of conductivity, experimentally (Deb &, Shukla, 2012). This paper will define hydraulic conductivity and discuss the properties... or the...
8 Pages(2000 words)Coursework

Hydraulic Machines

...of mechanics which relate continuity of mass and energy with force and momentum together with solid mechanics properties. Hydraulic machines are those machines which convert hydraulic energy into mechanical energy (further converted into electrical energy) or mechanical energy into hydraulic energy. The former types of machines are called turbines and the latter, pumps. Impact of a Jet onto a vane A combination of both pump and turbine is used in fluid couplings and torque converters for the transmission of power smoothly through a fluid medium. The analysis of impact of fluid jets on vanes is typically involved in the design of an efficient turbo-machine. When a vane moves away from...
4 Pages(1000 words)Essay

Hydraulic Conductivity as Source of Error laboratory specimens. As a consequence, the field scale hydraulic conductivity is necessary to be measured in situ employing field methods like the sealed double-ring infiltrometer. Conclusion As a consequence, there are a number of ways to produce errors in the test data while performing the hydraulic conductivity test. It is necessary to follow the procedural guidelines as strictly as possible in order to acquire the most accurate outcomes by diminishing error. Hydraulic conductivity or permeability in soils has been recognized as one of the most essential parameters that directs the performance of a mass of civil...
1 Pages(345 words)Lab Report

Bearing Capacity of Soils

...Bearing Capacity of Soils Abstract The objective of this experiment was to determine the right size for a foundation. It involved conducting tests and analyses of soil to determine the amount of pressure it could handle. The ability of a structure to withstand its own weight or that which it supports determines whether or not the structure will serve its purpose; these structures include buildings, billboards, swimming pools, or even roads. The bases of such structures, therefore, need to be properly designed, keeping in mind the overall soil structure. If this is not properly done, then the structures are likely to collapse, resulting in massive catastrophes. Sound engineering principles should be employed in the design... ...
2 Pages(1000 words)Lab Report

Hydraulic fracturing

...“Hydraulic fracturing” or “cracking” is a process of through which natural gas and oil are extracted from rocks thatare deep below the earth’s surface. The process entails injecting massive quantity of water, sand and chemicals at an explosive pressure for the rocks to crack.. The pumped fluid contains tiny particles of solid materials known as proppants, which prop up the fractures to open once the production process begins. Additionally, the hydraulic fracturing fluids is usually water-based and contain different chemicals, as well as bactericides among others to promote the efficiency of the fracturing process and stop damage from taking place. After hydraulic fracturing, the pressure...
2 Pages(500 words)Essay

Hydraulic fracking

...Hydraulic Fracking To UK Legislation Assembly 23/4 Dear Politicians The aimof this letter is to persuade UK politicians to lobby for adoption of hydraulic fracking as alternative energy source. The world is facing energy crisis due to globalization, man-made effects and climate effects that has rendered fossil energy sources insufficient. This has led to economies to seek alternative energy sources in order to be abreast with crisis management. UK is one of the economies that is experiencing the energy crisis and seeking alternatives. Fracking process that involves extraction of shale gas has been a project encouraged by the government and is the alternative source available apart from...
3 Pages(750 words)Essay

Ph conductivity lab

...and their mobility (Dalmas, n.d, p. 1). From figure 1, it is observed that as the concentration of ions in a solution increases so does the conductivity. Figure 1 relationship of concentration and conductivity (Adopted from Sjord and Gunnarson, 2002.p.652) Conductivity measurements are based upon the Measurement of electric current flowing between parallel plates of fixed size and fixed separation distance (leveling, 2002. P. 1). Electrical conductivity is dependent on the PH, temperature and dissolved carbon dioxide. Conductivity can either be intrinsic or extraneous. It has been reported that soil solutions presenting high...
4 Pages(1000 words)Lab Report

Soils report

...of the soil. The sieve test is carried out to determine the percentage of the different grains that are contained in the soil. The mechanical sieve analysis is carried out to determine the distribution of the coarse and the medium grained grains. It must be conducted within the ASTM D 422 - Standard Test Method for Particle-Size Analysis of Soils. Procedures 1. Test for soil moisture content The soil sample is weighed and recorded. The sizes of the particles are determined on a size with different sizes of the sieve holes. The soil is dried on an oven at a temperature of about 1050C -1100C. The weight of the dry...
5 Pages(1250 words)Lab Report
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.

Let us find you another Essay on topic Hydraulic Conductivity in Soils for FREE!

Contact Us