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Get parameters from NetCDF exported from EE

Get parameters from NetCDF exported from EE

Once the model has output, we can export the model output to NetCDF files. How to export to NetCDF files has been introduced in Export to NetCDF files. Figure 1 shows a form of exporting to NetCDF files.

This tutorial will provide information on the main parameters extracted from NetCDF files using Python script.

Table 1 shows the information on parameters obtained from the NetCDF files.

Figure 1. Export to NetCDF files from EFDC_Explorer.

Parameters



Parameters



I index of the model cells



Variable name

col

Long name

cell column index

J index of the model cells



Variable name

row

Long name

cell row index

Bottom elevation



Variable name

BELV

Unit

m

Dimensions

(time, CELL)

time is the Julian time since the base date of the model.

CELL is the cell index.

Water Surface Elevation



Variable name

WSEL

Unit

m

Dimensions

(time, CELL)

Cohesive grain size shear stress



Variable name

cohesive_shear

Unit

N/m2

Dimensions

(time, CELL)

Sediment bed top layer index



Variable name

bed_top

Unit

layer

Dimensions

(time, CELL)

Bed sediment thickness



Variable name

bed_thickness

Unit

m

Dimensions

(time, CELL, KB)

Sediment bed wet density



Variable name

bed_wet_density

Unit

kg/m3

Dimensions

(time, CELL, KB)

Bed sediment porosity



Variable name

bed_porosity

Unit

-

Dimensions

(time, CELL, KB)

Cohesive sediment



Variable name

cohesive_sediment

Unit

mg/L

Dimensions

(time, NSED2, CELL, KC)

Non-cohesive sediment



Variable name

noncohesive_sediment

Unit

mg/L

Dimensions

(time, NSND, CELL, KC)

Bed mass cohesive (Top Layer)



Variable name

bed_top_mass_cohesive

Unit

g/m2

Dimensions

(time, NSED, CELL)

Bed mass non-cohesive (Top Layer)



Variable name

bed_top_mass_noncohesive

Unit

g/m2

Dimensions

(time, NSND, CELL)

Sediment mass



Variable name

bed_mass

Unit

g/m2

Dimensions

(time, NSXD, CELL, KB)

Sediment mass fraction



Variable name

bed_mass_fraction

Unit

-

Dimensions

(time, NSXD, CELL, KB)

Average particle size of bed surface



Variable name

bed_d50

Unit

microns

Dimensions

(time, CELL)

Water temperature



Variable name

temperature

Unit

degC

Dimensions

(time, CELL, KC)

Dye



Variable name

dye

Unit

mg/L

Dimensions

(time, NDYE, CELL, KC)

Refractory particulate organic carbon



Variable name

RPOC

Unit

mg/L

Dimensions

(time, CELL, KC)

Labile particulate organic carbon



Variable name

LPOC

Unit

mg/L

Dimensions

(time, CELL, KC)

Dissolved organic carbon



Variable name

DOC

Unit

mg/L

Dimensions

(time, CELL, KC)

Refractory particulate organic phosphorus



Variable name

RPOP

Unit

mg/L

Dimensions

(time, CELL, KC)

Labile particulate organic phosphorus



Variable name

LPOP

Unit

mg/L

Dimensions

(time, CELL, KC)

Dissolved organic phosphorus



Variable name

DOP

Unit

mg/L

Dimensions

(time, CELL, KC)

Total phosphate



Variable name

P4D

Unit

mg/L

Dimensions

(time, CELL, KC)

Refractory particulate organic nitrogen



Variable name

RPON

Unit

mg/L

Dimensions

(time, CELL, KC)

Labile particulate organic nitrogen



Variable name

LPON

Unit

mg/L

Dimensions

(time, CELL, KC)

Dissolved organic nitrogen



Variable name

DON

Unit

mg/L

Dimensions

(time, CELL, KC)

Ammonia nitrogen



Variable name

NHX

Unit

mg/L

Dimensions

(time, CELL, KC)

Nitrate nitrogen



Variable name

NOX

Unit

mg/L

Dimensions

(time, CELL, KC)

Particulate biogenic silica



Variable name

SUU

Unit

mg/L

Dimensions

(time, CELL, KC)

Available dissolved silica



Variable name

SAA

Unit

mg/L

Dimensions

(time, CELL, KC)

Chemical oxygen demand



Variable name

COD

Unit

mg/L

Dimensions

(time, CELL, KC)

Dissolved oxygen



Variable name

DOX

Unit

mg/L

Dimensions

(time, CELL, KC)

Total active metal



Variable name

TAM

Unit

mg/L

Dimensions

(time, CELL, KC)

Fecal coliform bacteria



Variable name

FCB

Unit

MPN/100ml

Dimensions

(time, CELL, KC)

Phytoplankton



Variable name

ALG

Unit

mgC/L

Dimensions

(time, NALG, CELL, KC)

Total erosion rate in the cell



Variable name

bed_erosion_rate

Unit

g/cm2/s

Dimensions

(time, CELL)

Total deposition rate in the cell



Variable name

bed_deposition_rate

Unit

g/cm2/s

Dimensions

(time, CELL)

Bed toxics



Variable name

bed_toxics

Unit

mg/kg

Dimensions

(time, NTOX, CELL, KB)

Table 1. Export to NetCDF files from EFDC_Explorer.



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