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using System;
using System.Collections.Generic;
using System.Text;
namespace GeoFly
{
/// <summary>
///
/// </summary>
public class PETInDeBruin:PETInPM
{
/// <summary>
///
/// </summary>
/// <param name="tav"></param>
/// <param name="elev"></param>
/// <param name="yr"></param>
/// <param name="dn"></param>
/// <param name="lat">默认为33</param>
public PETInDeBruin(double tav, double elev, int yr, int dn, double lat)
: base(tav, elev, yr, dn, lat)
{
dTav = tav;
dElev = dElev;
}
//1W=1J/s;
//20W = 20*0.001*0.001*86400MJ/d = 1.728MJ/d
/// <summary>
///
/// </summary>
/// <param name="alfa">默认为0.95</param>
/// <param name="beta">默认为1.728</param>
/// <param name="G">默认为0</param>
/// <returns></returns>
public double PETByDeBruin(double alfa, double beta, double G)
{
double dret = 0;
double dlta = pwatvap.TmpVapCurveSlp(); //slope of the saturation vapor pressure-temperature curve
double gma = pwatvap.PsychroConst(); //psychrometric constant
double dNetRad = NetRadiation(); //net radiation
dret = alfa * dlta * (dNetRad - G) / (dlta + gma) + beta;
return dret;
}
/// <summary>
/// 同上,只是默认alfa=0.95,beta=1.728,G=0
/// </summary>
/// <returns></returns>
public double PETByDeBruin()
{
return PETByDeBruin(0.95, 1.728, 0);
}
}
}
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