Laws_sn.h

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/*
 *  SNOWPACK stand-alone
 *
 *  Copyright WSL Institute for Snow and Avalanche Research SLF, DAVOS, SWITZERLAND
*/
/*  This file is part of Snowpack.
    Snowpack is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    Snowpack is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with Snowpack.  If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef LAWS_SN_H
#define LAWS_SN_H
 
#include <string>
#include <meteoio/MeteoIO.h>
 
#include <snowpack/DataClasses.h>
#include <snowpack/snowpackCore/Snowpack.h> //some constants are necessary
 
 
class SnLaws {
 
        public:
                enum EventType {
                        event_none,
                        event_wind   
                };
                enum TempDependence {
                        t_term_arrhenius_critical=11, 
                        t_term_arrhenius=911,         
                        t_term_837=977,               
                        t_term_stk=999                
                };
                enum ViscosityVersion {
                        visc_dflt=111,  
                        visc_cal=333,   
                        visc_ant=335,   
                        visc_897=555,   
                        visc_837=977,   
                        visc_stk=999    
                };
 
                static double conductivity_ice(const double& Temperature);
                static double conductivity_water(const double& Temperature);
                static double conductivity_air(void);
 
 
                static double compWindPumpingDisplacement(const SnowStation& Xdata);
                static double compWindPumpingVelocity(const CurrentMeteo& Mdata, const double& d_pump);
                static double compWindGradientSnow(const ElementData& Edata, double& v_pump);
 
                static double compSensibleHeatCoefficient(const CurrentMeteo& Mdata, const SnowStation& Xdata,
                                                          const double& height_of_meteo_values);
                static double compLatentHeat_Rh(const std::string soil_evaporation, const CurrentMeteo& Mdata, SnowStation& Xdata,
                                                const double& height_of_meteo_values);
                static double compLatentHeat(const std::string soil_evaporation, const CurrentMeteo& Mdata, SnowStation& Xdata,
                                             const double& height_of_meteo_values);
 
                static double compSoilThermalConductivity(const ElementData& Edata, const double& dvdz,
                                                          const std::string& soil_thermal_conductivity);
 
                static double soilVaporDiffusivity(const ElementData& Edata);
                static double compEnhanceWaterVaporTransportSoil(const ElementData& Edata,const double& clay_fraction);
                static double compSoilThermalVaporConductivity(const ElementData& Edata_bot, const ElementData& Edata_top, const double& Te_bot, const double& Te_top,const double& clay_fraction);
                static double compSoilIsothermalVaporConductivity(const ElementData& Edata_bot, const ElementData& Edata_top, const double& Te_bot, const double& Te_top, const double& T_node);
 
                static double compSnowThermalConductivity(const ElementData& Edata, const double& dvdz, const bool& show_warnings=true);
 
                static double compEnhanceWaterVaporTransportSnow(const SnowStation& Xdata, const size_t& i_e);
 
                static double compLWRadCoefficient(const double& t_snow, const double& t_atm, const double& e_atm);
 
                static double parameterizedSnowAlbedo(const std::string& i_albedo, const std::string& i_albedo_parameterization, const std::string& i_albAverageSchmucki, const double& i_albNIED_av,
                                                      const double& i_hn_albedo_fixedValue, const ElementData& Edata, const double& Tss, const CurrentMeteo& Mdata, const bool& ageAlbedo=true);
                static void compShortWaveAbsorption(const std::string& i_sw_absorption_scheme, SnowStation& Xdata, const double& I0);
                static void compAdvectiveHeat(SnowStation& Xdata, const double& advective_heat,
                                                                  const double& depth_begin, const double& depth_end);
 
                static double compNewSnowDensity(const std::string& i_hn_density, const std::string& i_hn_density_parameterization, const double& i_hn_density_fixedValue,
                                                 const CurrentMeteo& Mdata, const SnowStation& Xdata, const double& tss,
                                                 const std::string& variant);
 
                static double NewSnowViscosityLehning(const ElementData& Edata);
                static double SnowViscosityMSU(const ElementData& Edata);
 
                static double snowViscosityTemperatureTerm(const double& Te);
                static double compLoadingRateStress(const std::string& variant, ElementData& Edata,
                                                    const mio::Date& date);
                static double loadingRateStressDEFAULT(ElementData& Edata, const mio::Date& date);
                static double loadingRateStressCALIBRATION(ElementData& Edata, const mio::Date& date);
                static double snowViscosityFudgeDEFAULT(const ElementData& Edata);
                static double snowViscosityFudgeCALIBRATION(const ElementData& Edata, const mio::Date& date);
                static double compSnowViscosity(const std::string& variant, const std::string& i_viscosity_model, const std::string& i_watertransport_model,
                                                ElementData& Edata, const mio::Date& date);
                static double snowViscosityDEFAULT(ElementData& Edata);
                static double snowViscosityKOJIMA(const ElementData& Edata);
                static double snowViscosityCALIBRATION(ElementData& Edata, const mio::Date& date);
                // minimum observed air emissivity: default=0.55 (from 1993 data at Weissfluhjoch) - Antarctica=0.31 (from 2006/2007 data of Dome C)
                static double AirEmissivity(mio::MeteoData& md, const std::string& variant);
                static double AirEmissivity(const double& ilwr, const double& ta, const std::string& variant);
                static double ArrheniusLaw(const double ActEnergy, const double T, const double T_ref);
 
                static double min_hn_density, max_hn_density, event_wind_lowlim;
                static const double smallest_viscosity, field_capacity_soil;
                static const bool jordy_new_snow, wind_pump, wind_pump_soil;
 
                static bool setStaticData(const std::string& variant, const std::string& watertransportmodel);
 
                static double newSnowDensityPara(const std::string& i_hn_model,
                                                 double TA, double TSS, double RH, double VW, double HH);
                static double newSnowDensityEvent(const std::string& variant, const SnLaws::EventType& i_event,
                                          const CurrentMeteo& Mdata);
                static double newSnowDensityEventModified(const std::string& variant, const SnLaws::EventType& i_event,
                                          const CurrentMeteo& Mdata, const SnowStation& Xdata, const double& tss);
 
                static double newSnowDensityHendrikx(const double ta, const double tss, const double rh, const double vw);
                static double event_wind_highlim;
                static EventType event;
 
                static double sn_dt; //Calculation time step in seconds as derived from CALCULATION_STEP_LENGTH
                static const bool __init;
                static std::string current_variant;
                static TempDependence t_term;
                static ViscosityVersion visc;
                static double visc_ice_fudge, visc_sp_fudge, visc_water_fudge;
                static bool setfix;
                static size_t swa_nBands;
                static std::vector<double> swa_k, swa_pc, swa_fb;
                //static const soil_evap_model soil_evaporation;
                static const double rsoilmin, relsatmin, alpha_por_tor_soil, pore_length_soil;
                static const double montana_c_fudge, montana_vapor_fudge, montana_v_water_fudge;
                static const double wind_ext_coef, displacement_coef, alpha_por_tor;
};
 
#endif