Precipitation correction

Precipitation varies linearly with elevation. Similarly, precipitation varies spatially across the catchment, but the amount of local precipitaiton is also a function of the elevation. However, the different areas will have precipitation-elevation relationships. Thus, the elevation corrected precipitation in a cell, when the precipitation is greater than zero, is

Equation 23.13:

\(P_{cell} = P_{ref} + (H_{cell} - H_{ref}) \cdot \beta_p\)

where \(P_{cell}\) is the precipitation in the cell, \(P_{ref}\) is the measured precipitation at a weather station, \(H_{cell}\) is the elevation of the cell, \(H_{ref}\) is the elevation of the weather station, and \(\beta_p\) is the elevation correction factor (lapse rate) for precipitation.

Note

The precipitation is a basic input parameter in MIKE SHE, so the precipitation elevation correction is always available.