freshwater package

Submodules

freshwater.constants module

class freshwater.constants.Constants

Bases: object

Constants from Chen and Millero (1986).

freshwater.eos module

class freshwater.eos.Eos(t, s=0, p=0)

Bases: object

Equation of state for freshwater from Chen and Millero (1986).

t

temperature (\(\mathrm{^{\circ} C}\))

Type

array_like

s

salinity (g/kg) grams of dissolved salt in 1 kg of lake water

Type

array_like

p

pressure (bar) applied pressure

Type

array_like

rho

density of lake water (\(\mathrm{kg \, m^{-3}}\))

Type

array_like

alpha

Coefficient of thermal expansion \(\mathrm{(^{\circ} C)^{-1}}\)

Type

array_like

tmd

Temperature of maximum density (\(\mathrm{^{\circ} C}\))

Type

array_like

u

Speed of sound (\(\mathrm{m \, s^{-1}}\))

Type

array_like

cp

Specific heat capacity (\(\mathrm{J \, kg^{-1} \, ^{\circ} C^{-1}}\))

Type

array_like

tf

Freezing point of lake water (\(\mathrm{^{\circ} C}\))

Type

array_like

References

1

Chen, C. T. A., & Millero, F. J. (1986). Thermodynamic properties for natural waters covering only the limnological range 1. Limnology and Oceanography, 31(3), 657-662.

Examples

Import the class Eos (Equation of state) from the freshwater module

>>> from freshwater.eos import Eos

Compute properties of lake water with a temperature of 10 deg C, a salinity of 0.5 g/kg and a pressure of 0 bar (gauge pressure).

>>> e = Eos(t=10, s=0.5, p=0)
>>> e.rho
1000.091963
>>> e.alpha
8.9433231e-05
>>> e.tmd
3.87295

freshwater.eos.polyval_r(p, x)

Identical to numpy.polyval except p is an array of coefficients of increasing order instead of decreasing order.

Module contents