CASES: Walnut River Data Set

This file describes data currently available on our anonymous ftp server. All data for this project have been made available by various participants in the program. If you have problems, questions, or comments, please contact us at hydro@hydro.washington.edu

For this data set, the Walnut River Basin has been defined as follows:

Hydrologic Data Region
Latitude Longitude
North West Corner 38:20:00 N 97:30:00 W
South East Corner 37:00:00 N 96:15:00 W

Atmospheric Data Region
Latitude Longitude
North West Corner 39:00:00 N 97:30:00 W
South East Corner 36:00:00 N 96:00:00 W

File Contents

AVAILABLE DATA:

USGS Stream Flow Data

USGS stream flow data has been recorded at 3 stations within the Walnut River basin. Data records are stored in three files, with the gage ids included in the file names:

Data is stored as standard USGS card files. Measurements are daily mean values in units of cfs.

For more information try our stream gage data page.

Surface Airways Data

The file Walnut.SUR.tar (9.2 Megs) contains hourly wind, pressure, temperature, cloud cover, and relative humidity data from 25 (26 for cloud cover) surface airways stations. The stations' locations and names are as follows:

filenameStation NamelatitudelongitudePeriod of Record
AR1####.BINFT SMITH MUNICIPAL 35.333 94.3671/1/1972 - 12/31/91
AR2####.BINLITTLE ROCK ADAM 34.733 92.2331/1/1972 - 12/31/91
KS1####.BINDODGE CITY MUNICIPAL 37.767 99.9671/1/1972 - 12/31/91
KS2####.BINRUSSELL MUNICIPAL AIRPORT 38.867 98.8171/1/1972 - 12/31/91
KS3####.BINWICHITA MID-CNTN 37.650 97.4331/1/1972 - 12/31/91
MO1####.BINCOLUMBIA REGIONAL 38.817 92.2171/1/1972 - 12/31/91
MO2####.BINSPRINGFIELD REGIONAL 37.233 93.3831/1/1972 - 12/31/91
OK1####.BINOKLAHOMA CITY WSFO A 35.400 97.6001/1/1972 - 12/31/91
OK2####.BINTULSA WSO AIRPORT 36.200 95.9001/1/1972 - 12/31/91

where #### indicates the 4 letter abbreviation for the data type:

WINDwind
RHUMrelative humidity
TMPDtemperature
PRESpressure
TSKCcloud cover

For more information about working with the Surface Airways data in these files, check out the surface airways data page. Source code for programs discussed in this document are included in the file sawd.source.tar (size 19295), while the necessary information files are included in sawd.runfiles.tar (size 3320).

STATSGO Soils Data

The following files contain information derived from STATSGO data: The file CASESHD.tar.gz (1.1 Megs) contains the extracted soil texture (from STATSGO data). Individual soil files are:

filenamesizedata type
awc.asc92201Available water capacity (fraction of total soil volume)
bd.asc95476Bulk density (g/cc)
perm.asc27541Permeability (m/day)
soilthick.asc22646Soil thickness (m), up to a maximum of 1.5 m
landuse.asc27541Landuse digitized from an old (1967) atlas codes:
1 mostly cropland
2 cropland with grazing land
8 subhumid grassland and semiarid grazing land
9 open woodland grazed (pinon, juniper, aspen groves, chaparral and brush)
16 urban
shed.asc25352Watershed mask (grid cells valued 1 are in the watershed)
clay.asc58934Percent Clay
sand.asc53837Percent Sand

Projection: Albers
Units: Meters
Spheroid: CLARK1866 (NAD27)
1st standard parallel: 29 30 00
2nd standard parallel: 45 30 00
Central meridian: -96 00 00
Latitude of projection's origin: 23 00 00

Currently the files have an Arc/Info compatible header:

To read the files into GRASS, substitute the following header:

Precipitation Data

Precipitation stations selected for this set are located within the boundaries of the atmospheric region. Station ID numbers are included in the file names:
FILENAMESizeStation NameLatitudeLongitude
s202401.dat74941EL DORADO 37.49 96.50
s202602.dat75317ESKRIDGE 1 SE38.5196.06
s202773.dat75620FLORENCE38.1596.56
s205152.dat74305MC PHERSON38.2297.40
s207305.dat74758SEDAN37.0896.11
s208670.dat74733WELLINGTON 2 S37.14 97.24
s404573.dat72684JEFFERSON36.4397.48
s406935.dat74074PAWHUSKA36.4096.21
s407012.dat74092PERRY36.1797.18

For more about processing and data formats check our precipitation data page. The processing programs discussed on that page can also be downloaded in a tar file:

Radiosonde Data

Radiosonde data is presented from the two nearest stations, since there are no stations located within the boundaries of the Walnut River study area.

The closest stations are:

STATION NAME STATION IDLATITUDELONGITUDEELEVATION(M)
TOPEKA 13996 3904N 09538W 268
OKLAHOMA CITY 13967 3524N 09736W 398

Each station takes two soundings daily, and each of these has been included in a separate file. These files are listed below:

FilenameSizeDescription
okc.0utc27664650 UTC soundings at OKLAHOMA CITY
okc.12utc283437612 UTC soundings at OKLAHOMA CITY
topeka.0utc31844410 UTC soundings at TOPEKA
topeka.12utc325484012 UTC soundings at TOPEKA

All files are in ascii format. Each sounding includes a header followed by the data record. Here is a sample header:

  13996   72100100        36
  981.0   268.  22.2 35.160.  5.
  950.0   546.  19.7 39.207.  5.
  900.0  1008.  15.3 45.245.  7.
  850.0  1488.  10.7 53.262.  9.
where the header is formatted as follows:

ColumnData Type
1Station ID
2Time (yymmddhh)
3Vertical Levels for Sounding

and the data format is:

ColumnData TypeMissing Value
1pressure (mb)
2height above sea level (m)
3temperature (C)
4relative humidity (%)999
5wind direction (degree)999
6wind speed (m/s)999

Digital Elevation Map

The file walnut.dem (size 976373), contains a 30 arc-second resolution DEM of the Walnut River Basin. This DEM is in latitude-longitude with the following GRASS header:

Hopefully this file will soon be converted to Albers projection, so that it conforms with the other raster files.

Useful Links

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