Help manual for:

				 WaterC

	A  program to calculate dependent state, thermodynamic, transport, and electrostatic properties of liquid and vapor in the H2O-System as a function of user-specified state conditions and unit and triple point conventions. It covers a range in temperature from circa -20 to 2250 C, and a range in pressure from circa 0.01 to 30000 bars; at pressures less than about 220 bars the phases of ice I through VII bound the  retrieval region.

			(Demsey, Norton, Johnson)
			   Freeware 1992-1993





Table of Contents

	Introduction
		Introduction
		Notes and Thanks
		Legalities
	
	Using Water
		Unpacking WaterC
		On Overview of the main menu

	Addresses




				Introduction
	Water is a program to calculate dependent state, thermodynamic, transport, and electrostatic properties of liquid and vapor in the H2O-System as a function of user-specified state conditions and unit and triple point conventions. It covers a range in temperature from circa -20 to 2250 C, and a range in pressure from circa 0.01 to 30000 bars; at pressures less than about 220 bars the phases of ice I through VII bound the  retrieval region.

	Water permits the curious user to the explore temperature, pressure and density space and retrieve corresponding property values or obtain incremental values of user selected properties.
 
	This equation of state has a critical point  at P=220 bars and T = 374.15 C; a region where vigorous activity occurs within the earth's crust.

				Notes and Thanks
	The computing engine and NeXTstep frontend materials for Water were written in C by M. Loki Demsey; the engine was optimized and rewritten from an original FORTRAN engine.  James Johnson and Dr. Denis Norton wrote the code and added pieces of pre-written code from Haar,Gallagher,Kell; NBS/NRC Steam Tables, Hemisphere Publishing Corp,1984, and Levelt, Sengers, et al., 1983.  
	
				Bibliography
Code references:
	Haar,Gallagher,Kell; NBS/NRC Steam Tables, Hemisphere Publishing Corp,1984
	Levelt, Sengers, et al., 1983
Original FORTRAN Project references:
	Johnson; Subroutine H2O88, Theoretical Geochemistry Software Library, 1988
	Johnson, Norton; Critical Phenomena in Hydrothermal..., Am J of Science,June 1991
Reference State reference:
	Helgeson,Kirkham; Theoretical Prediction of Thermodynamic Behavior...,
		Am J of Science, December, 1974
	
				Legalities	
Water {all versions} are released as Freeware 1992, 1993.
	It may not be re-released, published, or modified without express written consent of at least two of the three authors (Demsey, Norton, Johnson).
	

			     Unpacking WaterC
	Please follow the instructions for in the README file.  Make sure to modify the wconfig.h file as requested. 

		      An Overview of the Main Menu

Equation of State Properties for H2O 

(C)ompute properties 
(D)ata from file 
(I)nitial TP or TD conditions 
(O)utput preferences 
(S)aturation surface 
(T)riple point preference 
(U)nits change 
(Q)uit 
choose one: 

	C	is selected once you have set the input parameters, and output specifications to your liking.
	D	tells water to take it's input from a file of your naming.  The file is prefaced by an integer telling water how many pairs of Temp/Pres or Temp/Dens data points to expect, followed by the data pairs in float form.
	I	is selected to have water compute either a single TP/TD point or a series of points - incrementing over either one or both of Temp/Pres or Temp/Dens.
	O	gives the user the choice to specify whether (s)he wants data to go to a file or to the screen; whether the data will be output in a verbose format or in columns, and if in columns, lets the user choose up to eight column attributes; and, finally, the output field length of the double format number output in column form.
	S	lets the user follow the saturation surface along a user specified temperature or pressure increment.
T	permits the user to choose between a GeoChemical triple point or an Engineering triple point.
	U	gives the user a choice of units for temperature, pressure, density, and energy.
	Q	 terminates water.
	**At any submenu, a <CR> brings you up one menu level**



			Where to find us

M. Loki Demsey		Quaeler Software
	loki@Goat.Geo.Arizona.EDU  (NeXT mail)

Dr. Denis Norton		University of Arizona, Geology Department
	denis@Quartz.Tucson.Az.US 
		or  nort@Goat.Geo.Arizona.EDU  (NeXT mail)
	Post:
		Gould-Simpson Building,  Room 515
		University of Arizona
		Tucson, AZ  85721
		(602) 621-6009
Dr. James Johnson     Lawrence Livermore National Laboratories
	johnson@s05.es.Llnl.GOV (never NeXT mail)