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 | |
|---|---|
| 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.