A Caltech Library Service

Evaporation from lakes


Cummings, N. W. (1926) Evaporation from lakes. Dissertation (Ph.D.), California Institute of Technology.


Evaporation can be determined by the aid of the first law of thermodynamics in such a way that wind velocity need not enter the calculation. Air temperature and humidity enter only as terms in a correction which can have a relatively small average value under typical conditions. A method of finding the difference between incoming and outgoing radiation, from observations on a well insulated pan is described, and also a method of finding the ratio of sensible heat to latent heat transmitted through the air-water surface. These quantities can be used in estimating evaporation from an actual lake if proper corrections are made for storage of heat in the water, expansion of the water, and heat conveyed by inflowing and outflowing water. Two proposed engineering applications are outlined.

Item Type:Thesis (Dissertation (Ph.D.))
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Millikan, Robert Andrews
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1926
Record Number:CaltechETD:etd-02172005-153013
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:650
Deposited By: Imported from ETD-db
Deposited On:17 Feb 2005
Last Modified:26 Dec 2012 02:31

Thesis Files

PDF (Cummings_nw_1926.pdf) - Final Version
See Usage Policy.


Repository Staff Only: item control page