SOIL MAP OF THE PECOS RIVER BASIN

SEDAT YALCINKAYA

NOVEMBER 24, 2009SOIL MAP OF THE PECOS RIVER BASIN1OBJECTIVESProcessing the digital soil maps to obtain the input soil data for hydrologic modeling.Comparison of different digital soil data (FAO, NATSGO, STATSGO, SSURGO)2DIGITAL SOILS DATA FOR HYDROLOGIC MODELLINGWEAP Model Structure (Soil Moisture Method)Input Parameters

3STUDY AREA

WATERSHEDS (HUC_8)AREA (KM2)130402121048.176191306001111350.60629130700016454.582529130700022039.366686130700032913.223075130700045074.004481130700051831.660091130700063833.1138071307000716414.37423130700084962.616022130700092505.34438130700101997.452143130700112828.999238130700122573.636942TOTAL BASIN AREA65827.156114DATA SOURCE FOR SOILSFAO: http://www.fao.org/geonetwork/srv/en/metadata.showSTATSGO: http://datagateway.nrcs.usda.gov/ Available at US and state levelsSSURGO: http://soildatamart.nrcs.usda.gov/ http://datagateway.nrcs.usda.gov/ Available at County level

Tabular data are not reader friendly. They must be imported in an MS Access database template.

5

SPATIAL DATA

6RELATIONSHIP BETWEEN SPATIAL & TABULAR DATA

MapunitComponentHorizon

7ATTRIBUTES TABLE-STATSGO

3 polygons share the same mapunit (mukey 673265)Mapunit s7304 has 10 components in different percentagesFirst component (cokey 673265:1022795) has 2 layers8ATTRIBUTES TABLE-SSURGO

100 polygons represent one mapunitThis mapunit (mukey:364641) represents 2 componentsSSURGOSTATSGOPOLYGON229412MAP UNIT345COMPONENT87389RESULTSLevel of useDetail level of information

FAO UN,Generalized Worldwide soil map NRCS of USDA, just for US10RESULTSIt might be good for my purpose to study with NATSGO, but it is still under development.FAO is easy to use for my model. First, I need to know the contents of its attribute table. I am currently working on this.STATSGO is also good for my model, however I need to spend a lot of time for calculation of average values.SSURGO is definitely much more detailed than I need.

11QUESTIONS?12