National Landcover Database (2006)

More information at: http://www.mrlc.gov/nlcd06_data.php

USGS 19 category (30 sec) NLCD 33 category (1 sec)

Addition of Playa, White Sand, and Lava categories for WRF modeling over military test ranges

How to change landuse

1. Get landuse_1s_westconus_playa folder from Jeff and put it in your geog/ directory, includes crucial index file

2. In WPS/geogrid, add to GEOGRID.TBL an interp option and rel_path for the new dataset under LANDUSEF

3. In geogrid/src/source_data_module.F, change min_category=1 and max_category=33 in subroutine get_max_categories then recompile

4. In namelist.wps change the geog_data_res to the rel_path you set in GEOGRID.TBL

5. In WRFV3/run directory copy in Jeff’s VEGPARM.TBL and LANDUSE.TBL that have 33 categories

6. In namelist.input add in num_land_cat=33 under &physics

7. Contact Jeff with issues

BB - B parameter, used to calculate hydraulic conductivityDRYSMC - Soil moisture threshold when evap stopsMAXSMC – Soil porosityREFSMC – Soil moisture threshold when ET beings to stressSATDK – Saturated soil conductivity SATDW – saturated soil diffusivity WLTSMC – Wilting point of vegetationQTZ – Soil quartz content

Added new variable

Call CLYC in subroutine REDPARM in Noah LSM

How to add new variable to lookup table

Easy!

SHDFAC – green vegetation fractionNROOT – number of soil layers roots penetrate RS – stomatal resistanceRGL – parameter used for radiation stress functionHS – parameter used in vapor pressure deficit functionSNUP – snow depth (in m of water equivalent) that implies 100% snow cover

SHDMAX – maximum monthly vegetation cover from GREENFRAC variable initialized in met_em files

SHDMIN –Mimimum monthly veg cover

Vegetation categories may take max lookup table values, min values, or somewhere in between

Playa fixed at 0.46

Shrubland varying between 0.25 and 0.3

LANDUSE.TBL not used by Noah or RUC LSM. Values initialized in module_physics_init.F are overwritten by VEGPARM.TBL values