11_Supp%2011%20Darcy

11_Supp%2011%20Darcy - Introduction In 1856 Henry Darcy a...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
2 Introduction In 1856, Henry Darcy, a French hydraulic engineer, published a report in which he described a series of experiments he had performed in an attempt to quantify the amount of water that would flow through a column of sand. The experimental apparatus used was similar to the one displayed below. FIGURE 1- Experimental apparatus for the illustration of Darcy's Law. (Adapted from Freeze, R.A. and Cherry, J.A., 1979) This was the first systematic study of the movement of water through a porous medium. In this setup, water is introduced to a soil column at a constant rate Q. Water exits the column at the same rate Q, creating a steady-state flow regime. Fluid pressure is measured at two points on the column, separated by a column distance l and a vertical distance (z 1 -z 2 ). The results of Darcy's experiments indicated that the rate at which a fluid moves through a porous medium (Q) is proportional to the difference in hydraulic head of the water along the column and the characteristics of the porous medium and the column length. This relationship is known as Darcy's law : The parameters of this equation are listed in Table 1 below:
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
3 Table 1- Description of Darcy's law parameters Symbol Dim Definition During the Darcy experiment, constant head is maintained at either end of the column containing the porous medium. The discharge through the column is proportional to the change in head along the column and to the cross sectional area and inversely proportional to the length of the column. The constant of proportionality for this equation is called the
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/25/2010 for the course GLY 4288 taught by Professor Root during the Fall '10 term at FAU.

Page1 / 5

11_Supp%2011%20Darcy - Introduction In 1856 Henry Darcy a...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online