Update irrigation documentation

jeylander · May 5, 2020 · a6715d1 · a6715d1
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diff --git a/lis/configs/lis.config.adoc b/lis/configs/lis.config.adoc
@@ -9712,14 +9712,26 @@ location of the max root depth file for flood irrigation.
 location of the max root depth file for drip irrigation.
 
 `Irrigation GVF parameter 1:` specifies growing season for
-irrigation in Noah-MP (set to 0.40 for Noah 3.3 irrigation)
+irrigation in Noah-MP [set to 0.40 for Ozdogan et al. (2010)
+irrigation]
 
 `Irrigation GVF parameter 2:` specifies growing season for
-irrigation in Noah-MP (set to 0.00 for Noah 3.3 irrigation)
+irrigation in Noah-MP [set to 0.00 for Ozdogan et al. (2010) 
+irrigation]
+
+In the original GVF threshold in the sprinkler irrigation scheme by Ozdogan et al. (2010), 
+a fraction of 0.4 was applied as part of the max-min seasonality in GVF. Nie et al. (2018) 
+added a dyanmic option. These two parameters and the GVF range allow the user to adjust
+the percentage of the irrigation cut-off so that areas of greater GVF range will have a 
+higher percentage cut-off and areas of lower GVF range will have a lower cut-off. In the 
+code, the irrigation threhold contains the term 
+(GVFparam1 + GVFparam2*(shdmax-shdmin))
+instead of a static value of 0.4. By using this equation, the user may adjust the cut-off 
+percentage as a function of GVF range (shdmax-shdmin).
 
 `Groundwater abstraction for irrigation:` specifies whether
 to withdraw water used for irrigation from the groundwater
-in Noah-MP.
+in Noah-MP
 1=Yes 0=No (default=0)
 
 .Example _lis.config_ entry

diff --git a/lis/surfacemodels/land/noahmp.3.6/irrigation/noahmp36_getirrigationstates.F90 b/lis/surfacemodels/land/noahmp.3.6/irrigation/noahmp36_getirrigationstates.F90
@@ -1,4 +1,4 @@
-!-----------------------BEGIN NOTICE -- DO NOT EDIT-----------------------
+!----------------------BEGIN NOTICE -- DO NOT EDIT-----------------------
 ! NASA Goddard Space Flight Center Land Information System (LIS) v7.1
 !
 ! Copyright (c) 2015 United States Government as represented by the
@@ -215,8 +215,8 @@ subroutine noahmp36_getirrigationstates(n,irrigState)
    ! If we are outside of the irrigation window, set rate to 0
      if ((ltime.gt.shift_otimee).or.(ltime.lt.shift_otimes)) then
        irrigRate(t) = 0.0
-       write(LIS_logunit,*) '[INFO] ',ltime, &
-            'is outside the irrigation window'     
+!       write(LIS_logunit,*) '[INFO] ',ltime, &
+!            'is outside the irrigation window'     
      endif
 
 ! Calculate vegetation and root depth parameters