discharge_interpolace: Function for use of interpolation methods in the stream...
In houbysvoctem/StreamDischarge: Evaluation of hydrometric measurement.

Description Usage Arguments Details Value Author(s) See Also Examples

Discharge from the interpolated values of point velocities in the river cross-section.

1	discharge_interpolace(data, interpolace)

data

Data must be in format: data.frame. In data there must be columns: Loc, Depth, MeasD, Vel. Means: Loc - "x" location of point from the bank of the stream [meters], Depth - depth of vertical of measured point [meters], MeasD - depth of measured point in vertical [meters], Vel - measured point velocity [m*s^(-1)]. Measured verticals must be in order from the lowest value of "x" location to highest "x" location or from the highest value of "x" location to the lowest value of "x" location.

interpolace

interpolace = 1 for the aritmetical mean, 2 for the inverse distance weighted, 3 for the ordinary kriging interpolation

The parameters of the interpolation models were calibrated on 45 data sets of small Czech streams, with the DE/rand/i/bin optimizator. Interpolation is done in the ortoghonal regular mesh with calibrated size of grid. Volume of discharge is calculated as sum of blocks with the top in the point velocity and the bottom in the cross-section plane.

Discharge in m^3.s^-1.

Eliska Friedlova (Hasnikova)

See also arith_mean, ind_dis_w, ord_kriging