mio::ListonWindAlgorithm Class Reference

Detailed Description

Curvature/slope influenced wind interpolation algorithm.

This is an implementation of the method described in G. E. Liston and K. Elder, "A meteorological distribution system for high-resolution terrestrial modeling (MicroMet)", Journal of Hydrometeorology, 7.2, 2006. The wind speed and direction are spatially interpolated using IDWLapseAlgorithm. Then, the wind speed and direction fields are altered by wind weighting factors and wind diverting factors (respectively) calculated from the local curvature and slope (as taken from the DEM, see DEMObject). The wind diverting factor is actually the same as in RyanAlgorithm. It takes the following arguments:

• ETA: this is a topographic length scale (m) for calculating the curvature. Recommended is to choose this length scale equal to approximately half the wavelength of the topographic features within the domain (e.g., the distance from a typical ridge to the nearest valley) (default: equal to grid cell size).
• SCALE: this is a scaling parameter to smooth the IDW distribution. In effect, this is added to the distance in order to move into the tail of the 1/d distribution (default: 1000m);
• ALPHA: this is an exponent to the 1/d distribution (default: 1);
• all the trend-controlling arguments supported by Trend::Trend().

VW::algorithms = LISTON_WIND

#include <ListonWindAlgorithm.h>

Public Member Functions
	ListonWindAlgorithm (const std::vector< std::pair< std::string, std::string > > &vecArgs, const std::string &i_algo, const std::string &i_param, TimeSeriesManager &i_tsm)
virtual double	getQualityRating (const Date &i_date)
virtual void	calculate (const DEMObject &dem, Grid2DObject &grid)
Public Member Functions inherited from mio::InterpolationAlgorithm
	InterpolationAlgorithm (const std::vector< std::pair< std::string, std::string > > &, const std::string &i_algo, const std::string &i_param, TimeSeriesManager &i_tsm)
virtual	~InterpolationAlgorithm ()
virtual double	getQualityRating (const Date &i_date)=0
virtual void	calculate (const DEMObject &dem, Grid2DObject &grid)=0
std::string	getInfo () const
	Return an information string about the interpolation process. More...

Protected Member Functions
void	simpleWindInterpolate (const DEMObject &dem, Grid2DObject &VW, Grid2DObject &DW)
Protected Member Functions inherited from mio::InterpolationAlgorithm
std::vector< double >	getData (const Date &i_date, const std::string &i_param)
size_t	getData (const Date &i_date, const std::string &i_param, std::vector< double > &o_vecData, std::vector< StationData > &o_vecMeta)

Protected Attributes
Trend	trend
std::vector< double >	vecDataVW
std::vector< double >	vecDataDW
	vectors of extracted VW and DW More...
double	eta
double	scale
double	alpha
	a scale parameter for calculating curvature, a scale parameter to smooth out the 1/dist and an exponent More...
size_t	param_idx
bool	inputIsAllZeroes
Protected Attributes inherited from mio::InterpolationAlgorithm
TimeSeriesManager &	tsmanager
Date	date
std::vector< MeteoData >	vecMeteo
std::vector< double >	vecData
	store the measurement for the given parameter More...
std::vector< StationData >	vecMeta
	store the station data for the given parameter More...
std::ostringstream	info
	to store some extra information about the interplation process More...
const std::string	param
	the parameter that we will interpolate More...
size_t	nrOfMeasurments
	Number of stations that have been used, so this can be reported to the user. More...

Additional Inherited Members
Public Attributes inherited from mio::InterpolationAlgorithm
const std::string	algo

Constructor & Destructor Documentation

ListonWindAlgorithm()

mio::ListonWindAlgorithm::ListonWindAlgorithm	(	const std::vector< std::pair< std::string, std::string > > &	vecArgs,
		const std::string &	i_algo,
		const std::string &	i_param,
		TimeSeriesManager &	i_tsm
	)

Member Function Documentation

calculate()

void mio::ListonWindAlgorithm::calculate ( const DEMObject &  dem, Grid2DObject &  grid  )

virtual

Implements mio::InterpolationAlgorithm.

Reimplemented in mio::RyanAlgorithm.

getQualityRating()

double mio::ListonWindAlgorithm::getQualityRating ( const Date &  i_date )

virtual

Implements mio::InterpolationAlgorithm.

Reimplemented in mio::RyanAlgorithm.

simpleWindInterpolate()

void mio::ListonWindAlgorithm::simpleWindInterpolate ( const DEMObject &  dem, Grid2DObject &  VW, Grid2DObject &  DW  )

protected

Member Data Documentation

alpha

double mio::ListonWindAlgorithm::alpha

protected

a scale parameter for calculating curvature, a scale parameter to smooth out the 1/dist and an exponent

eta

double mio::ListonWindAlgorithm::eta

protected

inputIsAllZeroes

bool mio::ListonWindAlgorithm::inputIsAllZeroes

protected

param_idx

size_t mio::ListonWindAlgorithm::param_idx

protected

scale

double mio::ListonWindAlgorithm::scale

protected

trend

Trend mio::ListonWindAlgorithm::trend

protected

vecDataDW

std::vector<double> mio::ListonWindAlgorithm::vecDataDW

protected

vectors of extracted VW and DW

vecDataVW

std::vector<double> mio::ListonWindAlgorithm::vecDataVW

protected

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The documentation for this class was generated from the following files:

• ListonWindAlgorithm.h
• ListonWindAlgorithm.cc