Changes between Version 57 and Version 58 of Documentation/TrunkFunctionality4


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Timestamp:
2020-07-03T10:26:05+02:00 (4 years ago)
Author:
luyssaert
Comment:

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  • Documentation/TrunkFunctionality4

    v57 v58  
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    336336=== Root profile === 
    337 Describes r682X. The approach that has been used in previous versions of the trunk describes the root profile as a truncated exponentially decreasing function of depth. The function is truncated at a prescribed depth ('''maxdepth'''). The shape of the root profile is prescribed by th epft-dependent parameter '''humcste'''.  
     337Describes r6824. The approach that has been used in previous versions of the trunk describes the root profile as a truncated exponentially decreasing function of depth. The function is truncated at a prescribed depth ('''maxdepth'''). The shape of the root profile is prescribed by th epft-dependent parameter '''humcste'''.  
    338338 
    339339In r4363 a second option was added and a dynamic root profile can be calculated by setting the flag '''ok_dynroot''' to y. The dynamic root profile optimizes soil moisture usage and was modified from Dan Zhu's initial implementation to acount for soil layer depth. This flag only affects how roots are calculated in hydrol.f90 but has no impact on how the root profile is calculated in stomate_resp.f90, stomate_litter.f90, stomate_soil_carbon_discretization.f90, hydraulic_architecture.f90 andstomate_windthrow.f90.  
    340340 
    341 In r682x a third approach was added but only affects the calculation of water stress in hydraulic_architecture. This approach is very similar to what has been done in hydrology but the moisture content (kg/kg) is used rather than soil moisture in (m-2/kg) and to enable better testing a second flag was introduced ('''ok_dynroot_ha'''). Following some tests and additional discussion it is probably worth to clean the code, enhance the consistencies across the modules and reduce the number of variables names.  
     341In r6824 a third approach was added but only affects the calculation of water stress in hydraulic_architecture. This approach is very similar to what has been done in hydrology but the moisture content (kg/kg) is used rather than soil moisture in (m-2/kg) and to enable better testing a second flag was introduced ('''ok_dynroot_ha'''). Note that when ok_dynroot_ha is set to true, the variable e_frac is passed from hydraulic architecture to hydrol and therefore the root profile calculated in hydraulic architecture will be used in hydrol when the transpiration is take out of the different soil layers. Following some tests and additional discussion it is probably worth to clean the code, enhance the consistencies across the modules and reduce the number of variables names (see ticket #715).  
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