[GRASS-SVN] r32053 - in grass-addons/gipe: i.evapo.PT i.evapo.SENAY

[svn_grass at osgeo.org]

Author: ychemin
Date: 2008-07-08 18:47:16 -0400 (Tue, 08 Jul 2008)
New Revision: 32053

Modified:
   grass-addons/gipe/i.evapo.PT/description.html
   grass-addons/gipe/i.evapo.SENAY/description.html
Log:
updated description.html for more information about running the modules

Modified: grass-addons/gipe/i.evapo.PT/description.html
===================================================================
--- grass-addons/gipe/i.evapo.PT/description.html	2008-07-08 22:15:15 UTC (rev 32052)
+++ grass-addons/gipe/i.evapo.PT/description.html	2008-07-08 22:47:16 UTC (rev 32053)
@@ -4,7 +4,7 @@
 The Priestley-Taylor model (Priestley and Taylor, 1972) is a modification of Penman’s more theoretical equation.
 
 <H2>NOTES</H2>
-RNETD optional output from r.evapo.potrad is giving good results as input for net radiation in this module.
+RNETD optional output from i.evapo.potrad is giving good results as input for net radiation in this module.
 
 Alpha values:
 1.32 for estimates from vegetated areas as a result of the increase in surface roughness (Morton, 1983; Brutsaert and Stricker, 1979)
@@ -21,17 +21,17 @@
 
 <em>
 <A HREF="i.evapo.PM.html">i.evapo.PM</A><br>
-<A HREF="i.evapo.TSA.html">i.evapo.TSA</A><br>
 <A HREF="i.evapo.potrad.html">i.evapo.potrad</A><br>
 <A HREF="i.eb.netrad.html">i.eb.netrad</A><br>
 <A HREF="i.eb.g0.html">i.eb.g0</A><br>
+<A HREF="i.evapo.TSA.html">i.evapo.TSA</A><br>
 </em>
 
 
 <H2>AUTHORS</H2>
 
-Yann Chemin, GRASS Development team, 2007<BR>
+Yann Chemin, GRASS Development team, 2007-08<BR>
 
 
 <p>
-<i>Last changed: $Date: 2007/02/10 11:58:15 $</i>
+<i>Last changed: $Date: 2008/07/10 11:58:15 $</i>

Modified: grass-addons/gipe/i.evapo.SENAY/description.html
===================================================================
--- grass-addons/gipe/i.evapo.SENAY/description.html	2008-07-08 22:15:15 UTC (rev 32052)
+++ grass-addons/gipe/i.evapo.SENAY/description.html	2008-07-08 22:47:16 UTC (rev 32053)
@@ -1,10 +1,20 @@
 <H2>DESCRIPTION</H2>
 
 <EM>i.evapo.SENAY</EM> Calculates the diurnal actual evapotranspiration after Senay (2007). This is converting all Net radiation from the diurnal period into ET, then uses Senay equation for evaporative fraction.
-It takes input maps of Albedo, surface skin temperature, latitude, day of year, single-way transmissivity and takes input value of the density of fresh water. DEM is used for calculating min and max temperature for Senay equation.
+
+It takes input maps of Albedo, surface skin temperature, latitude, day of year, single-way transmissivity and takes input value of the density of fresh water. 
+
+DEM is used for calculating min and max temperature for Senay equation.
+
 The "-s" flag permits output map of evaporative fraction from Senay.
+
+
 <H2>NOTES</H2>
+If you are trying to map irrigated crops, and you know there is at least one crop pixel that is evapotranspiring at maximum (ETa=ETpot), then read this.
 
+i.evapo.SENAY is highly dependent on the wet pixel being the lowest temperature in the crop pixels to work for non water stressed crops, force it that way, even if it breaks non crop areas. I suggest you reduce your region to the irrigation system boundaries, checking that it includes a bit of dry area for the hot/dry pixel.
+
+
 <H2>TODO</H2>