hypso_functions: Hypsographic Functions from Tabular Interpolation

In rSALMO: Simulation of ecological lake models

Description

The main function creates a function list object from a data table to allow interpolation of depths, areas and volume fractions of layers.

Usage

hypso_functions(table)

Arguments

table

hypsographic table (bathymetry) given as data frame with columns level, area and volume

Value

a list of functions with the following elements (slots):

• level(volume) interpolates level from volume

• volume(level) interpolates volume from a given water level

• area(level) interpolates area from a given level

• vh(level, zmixreal) calculates hypolimnic volume from surface water level (m above ground) and mixing depth (zmixreal, thermocline in m below surface)

• ve(level, zmixreal) calculates epilimnic volume from surface water level and zmixreal

• zmix(level, zmixreal) calculates average mixing depth (zmix) from surface water level and zmixreal

• zhm(level, zmixreal) calculates average depth of bottom layer (hypolimnion and metalimnion)

• sediment_area(level) calculates sediment area for a series of water levels, where level shoudl be a vecor of water levels in ascending order

• pelagic_ratio(level) calculates the area ratio of the pelagic part (water) to the total area of layers. It is equal to 1 - sediment area fraction.

See Also

hypso_bautzen, an example of a hypsographic table
areaFunction, functions to create a hypsographic table for lakes with conical shape.

Examples

data(hypso_bautzen)                      # load data table
hypso <- hypso_functions(hypso_bautzen)  # create function object

hypso$volume(166)                        # volume at 166 m a.s.l.
hypso$sediment_area(c(160, 166))         # sediment area of hypo- and epilimnion

rSALMO documentation built on May 2, 2019, 6:12 p.m.