Principles and Conditions of the Movements of Ground Water

Principles and Conditions of the Movements of Ground Water

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1899 edition. Excerpt: ... have been observed could be accounted for, provided the quantitative relations were right. It is not clear, however, that sure grounds can be assigned for thinking that such a relation exists. CHAPTER III. RATE OF FLOW OF WATER THROUGH SAND AXD ROCK. In the preceding chapter an attempt has been made to show how the observed flows of both water and air through sand and rock, as well as other porous media, are related to the pressure, and at the same time to show in how far these observed relations conform to the PoiseuilleMeyer law. It is the purpose in this chapter to deal with the results from the standpoint of quantity of flow per unit of time as it is related to various factors. INFUENCE OF THE FORM, DIAMETER, AND ARRANGEMENT OF SOIL AND SAND GRAINS ON THE AMOUNT OF FLOW. It has become sufliciently evident from the data and discussion already presented that both the diameter of the sand or soil grains and the amount of pore space which has resulted from the massing of the grains together are factors of fundamental importance in determining the amount of water which may pass a given section of any stratum in a unit of time. It is not enough to know the percentage volume of empty space in a given medium when the possible amount of flow under stated conditions is to be determined from theoretical considerations; but the extent of subdivision and the form of the pores must also be known. In his paper in this volume Professor Slichter has considered the mathematical relations of spherical soil grains of uniform diameter to the pore space, and he finds that the minimum value for such a case is 25.95 per cent. This occurs when each sphere touches adjacent spheres in twelve points and forms an element of volume which is a rhon1bohedron, having more

Product details

  • Paperback | 92 pages
  • 187.96 x 241.3 x 7.62mm | 181.44g
  • Miami Fl, United States
  • English
  • Illustrations, black and white
  • 1236630971
  • 9781236630971