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start:hype_model_description:hype_land

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start:hype_model_description:hype_land [2018/10/16 08:36]
cpers [Soil temperature and snow depth]
start:hype_model_description:hype_land [2019/03/19 14:19] (current)
cpers [Diagnostic variables]
Line 38: Line 38:
 Some additional output variables are calculated from the soil state variables. ​ Some additional output variables are calculated from the soil state variables. ​
  
-=== Ground water level ===+=== Groundwater ​level ===
  
-A water table is calculated for each soil layer (//gwat//from the proportion ​of water-filled pores of effective porosity. If the ground water reaches above the surface, the water is calculated with 100% porosity.+The groundwater level is measured negative from surface ​(0mto bottom ​of the soil layers. A positive groundwater level means that the soil surface is below water. If the ground water table reaches above the surface, the water is calculated with 100% porosity.
  
-  IF(soil(k)-wp(k)-fc(k)>​0.0) +The water table is found in the lowest ​soil layer that is not completely filled with water. Soil layers above this layer may have water in its effective porosity, but that is not included in the groundwater level output variable.  
-    ​gwat(k) = (soil(k)-wp(k)-fc(k)-ep(k))/​ep(k) * soillayerthick(k) –  +The water table for a soil layer is calculated linearly from the proportion of water-filled pores of effective porosity part of the soil pore volume. If the soil moisture of a soil layer is at field capacity ​(or below), the groundwater level of that soil layer is at the bottom of the layer. If the pore volume is filled, the groundwater level of that soil layer is at the top of the layer
-               ​soillayerdepth(k-1) +
-  IF(gwat(1) > 0) gwat(1) = (soil(1)-wp(1)-fc(1)-ep(1))/​1000.+
  
-The water table measured as a negative from ground surface to bottom. A positive ground water table means that the land is under water. ​ 
-The lowest soil layer that is not completely filled with water is defined as the "​official"​ ground water table layer and is the one being printed. Soil layers above this may have water in its effective porosity. ​ 
  
 === Soil moisture deficit === === Soil moisture deficit ===
start/hype_model_description/hype_land.txt · Last modified: 2019/03/19 14:19 by cpers