Laserfiche WebLink
:~ <br /> <br />GeoScience Services <br />o = surface tension <br />~ = angle of capillarity <br />r = pore/capillarity radius <br />h = height of capillary use <br />Figure 1 The phenomenon of capillarity <br />2263 Kingston Road <br />Crand Junction, CO 81503 <br />(970) 3I4-3356 <br />As illustrated in Figure 1, water will rise in a capillary tube a distance of (h) depending <br />on the radius (r) of the capillary tube. Connected pores in soil or rock are analogous to a <br />capillary tube. The smaller the radius or the finer grain the soil, the greater the height (h) <br />the water will rise in the capillary. The height of rise (h) is a measurement of the matrix <br />potential (`Ym) and represents a negative pressure compazed to atmospheric pressure-- <br />hence the term soil suction. <br />