The equation of drain spacing developed by Hooghoudt has gained considerable popularity among drainage design engineers because it is sufficiently accurate and possesses a simple mathematical expression. The latter is due to the notion of equivalent depth which he introduced. On the contrary, the application of the equation is quite cumbersone, requiring a trial-and-error procedure. In recent years drainage design for unsteady flow conditions also utilized the notion of equivalent depth. To simplify the use of both the drain spacing and the equivalent depth equations, they are put into dimensionless form containing fewer independent variables. An array of values suffices for quick and inexpensive determination of the equivalent depth. Table of dimensionless equivalent depth also were prepared. A unique dimensionless nomographic solution of the drain spacing equation was obtained and is displayed in a set of five graphs for reasons of readability. Finally, work relevant of Hooghoudt equations by two investigators is analyzed with the aid of this analysis.

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00084130
  • Record Type: Publication
  • Report/Paper Numbers: 1182 Proc Paper
  • Files: TRIS
  • Created Date: Apr 22 1975 12:00AM