/// <summary>
/// Method to calculate water use sums.
/// </summary>
/// <param name="n">Number of days prior to today for summation</param>
/// <param name="et"></param>
/// <param name="row"></param>
/// <param name="numDaysRead"></param>
/// <returns></returns>
internal static double EtSummation(int n, Series et, CropDatesDataSet.CropDatesRow row,
int numDaysRead)
{
double etSum = 0;
double dayET;
for (int i = 1; i <= n; i++)
{
if (i > numDaysRead)//Handles Charts within 14days of ETr Start Date
{
dayET = 0;
}
else
{
dayET = WaterUse(et[numDaysRead - i].DateTime, et[numDaysRead - i].Value, row);
if (dayET < 0)//Handles missing ET values
{
dayET = 0;
}
else
{
}
}
etSum = etSum + dayET;
}
return(etSum);
}
internal static double WaterUse(DateTime t, double et, CropDatesDataSet.CropDatesRow row)
{
var kc_value = ReadCoefficients(row.cropcurvenumber);
var jd = t.DayOfYear;
var jpd = row.startdate.DayOfYear;
var jcd = row.fullcoverdate.DayOfYear;
var jtd = row.terminatedate.DayOfYear;
var kc = CropCoefficient(kc_value, jd, jpd, jcd, jtd);
return(et * kc);
}
internal static double WaterUse(DateTime t, double et, CropDatesDataSet.CropDatesRow row)
{
var kc_value = ReadCoefficients(row.cropcurvenumber);
if (kc_value.Length == 0)
{
throw new Exception("Error: crop number " + row.cropcurvenumber + " not found " + row.cropname);
}
var jd = t.DayOfYear;
var jpd = row.startdate.DayOfYear;
var jcd = row.fullcoverdate.DayOfYear;
var jtd = row.terminatedate.DayOfYear;
var kc = CropCoefficient(kc_value, jd, jpd, jcd, jtd);
return(et * kc);
}
/// <summary>
/// Calculates the Daily Crop ET.
/// </summary>
/// <param name="numDaysRead">Number of days between Chart Generation date and the Start Date</param>
/// <param name="n">The number of days from today for which you want the Crop ET</param>
/// <param name="et"></param>
/// <param name="row"></param>
/// <returns></returns>
internal static string ETCropDaily(int numDaysRead, int n, HydrometDailySeries et, CropDatesDataSet.CropDatesRow row)
{
double val = 0.00;
if (numDaysRead > n)
{
val = CropCurves.WaterUse(et[numDaysRead - n].DateTime, et[numDaysRead - n].Value, row);
}
else
{
}
if (val < 0)
{
return("msng");
}
else
{
return(val.ToString("F2"));
}
}
