national landcover database (2006) more information at:
DESCRIPTION
National Landcover Database (2006) More information at: http://www.mrlc.gov/nlcd06_data.php. NLCD 33 category (1 sec). USGS 19 category (30 sec) . Addition of Playa, White Sand, and Lava categories for WRF modeling over military test ranges. How to change landuse. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: National Landcover Database (2006) More information at:](https://reader030.vdocuments.mx/reader030/viewer/2022033023/5681664c550346895dd9c5a7/html5/thumbnails/1.jpg)
National Landcover Database (2006)
More information at: http://www.mrlc.gov/nlcd06_data.php
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USGS 19 category (30 sec) NLCD 33 category (1 sec)
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Addition of Playa, White Sand, and Lava categories for WRF modeling over military test ranges
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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
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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
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Call CLYC in subroutine REDPARM in Noah LSM
How to add new variable to lookup table
Easy!
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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
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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
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Playa fixed at 0.46
Shrubland varying between 0.25 and 0.3
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LANDUSE.TBL not used by Noah or RUC LSM. Values initialized in module_physics_init.F are overwritten by VEGPARM.TBL values