Mapping Table:Example Mapping Table File

The following example Mapping Table file is for the North Fork watershed. Index maps of land use and soil texture are used to assign all the parameter values. The land use index map can contain three values, 1, 2, and 3. The soil texture index map can contain only the values 1 and 2. Tables for processes not used and multiple methods of solving different processes, such as Green and Ampt infiltration and Richards’ equation can be created. Which method is used will be determined by the card in the project file, i.e. GREEN_AMPT, INF_REDIST, INF_RICHARDS.

GSSHA_INDEX_MAP_TABLES
INDEX_MAP      soil1.idx         "Soils map of North Fork"
INDEX_MAP      landuse.idx	    “Land use map of North Fork”
INDEX_MAP      landuse.idx    “This map not used”
ROUGHNESS  “Land use map of North Fork”
NUM_IDS 3
ID    Description				Roughness
1     Urban					0.05
2     Fields					0.2000
3     Fields					0.1000
INTERCEPTION  “Land use map of North Fork”
NUM_IDS 3
ID    Description			StorCap     	IntrCoeff
1     Urban                   		0.1000		0.1000
2     Fields				0.1000	 	0.1000
3     Forest		      		0.2000		0.2000
RETENTION  “Land use map of North Fork”
NUM_IDS 3
ID    Description			Retention
1     Urban             		0.5
1     Fields				1.0
2     Forest				2.0
GREEN_AMPT_INFILTRATION  “Soils map of North Fork”
NUM_IDS 2
ID    Description  HY_COND  CAP_HEAD  POR  POR_IDX  RES_SAT  
1     Clay	   0.10     50.0      0.45 3.0      0.10     
2     Sand	   1.0       7.0      0.55 1.0      0.05     
GREEN_AMPT_INITIAL_SOIL_MOISTURE  “Soils map of North Fork”
NUM_IDS 2
ID    Description			Moisture
1     Clay				0.40
2     Sand				0.10  
RICHARDS_EQN_INFILTRATION_BROOKS  “Soils map of North Fork”
NUM_IDS 2
MAX_NUMBER_CELLS 65
ID	Descript	Ks	θs	θr	θi	θwp	d	λ	ψb	Δz
1	Clay		0.1	0.5	0.1	0.25	0.15	10.0	3.0	-50.0	1.0
			0.1	0.5	0.1	0.35	0.15	50.0	3.0	-50.0	2.0
			0.1	0.5	0.1	0.45	0.15	100.0	3.0	-50.0	5.0
2	Sand		1.0	0.45	0.1	0.25	0.05	10.0	1.5	-10.0	2.0
			1.0	0.45	0.1	0.35	0.05	10.0	1.5	-10.0	5.0
			1.0	0.45	0.1	0.35	0.05	10.0	1.5	-10.0	10.0
EVAPO-TRANSPIRATION  “Land use of North Fork”
NUM_IDS 2
ID    Description	Alb        Wilt       VegH    VRadC  CanRes
1     Urban		0.100      0.100       0.100  0.100  0.100
2     Fields		0.200      0.200      10.0    0.200  0.200
3     Forest		0.300      0.300       0.15   0.300  0.300
SOIL_EROSION_PROPS  “Soils map of North Fork”
NUM_IDS 2
ID    Description			Erode    Sand      Silt
1     Clay				0.100     0.100     0.900
2     Sand				0.200     0.900     0.100
SOIL_EROSION_FACTORS  “Land use map of North Fork”
NUM_IDS 3
ID    Description			C Mng     Cons P
1     Urban				0.100     0.100
1     Fields				0.100     0.100
2     Forest				0.500     0.500