| Data Tables, Images, and Other Entities: |
| Data Table: | Column_Descriptions_And_Units
View Table Metadata |
| Online Distribution Info: |
| Download File: |
|
|
| Data Set Owner(s): |
|
Individual: | Diane McKnight |
|
Address: |
| INSTAAR, |
| 1560 30th Street, |
| Campus Box 450 , |
| Boulder, CO 80309-0450
USA |
|
|
Phone:
|
|
|
Email Address:
|
|
|
| Metadata Provider(s): |
|
Organization: | McMurdo Dry Valleys LTER |
|
Address: |
| Byrd Polar Research Center , |
| 108 Scott Hall, |
| 1090 Carmack Rd, |
| Columbus, OH 43210-1002 USA |
|
|
Phone:
|
|
|
Phone:
|
|
|
Email Address:
|
|
|
| Abstract: |
| |
As part of the Long Term Ecological Research (LTER) project in the McMurdo Dry
Valleys of Antarctica, a systematic sampling program has been undertaken to monitor the
glacial meltwater streams in that region. These tables contain data pertaining to continuous
monitored water quality and quantity parameters measured with automatic recording devices on
streams in this region.
|
|
| Keywords: |
|
|
- streamflow
(theme)
- hydrology
(theme)
- discharge
(theme)
- conductivity
(theme)
- temperature
(theme)
|
| Additional Information: |
| |
| Citations |
None.
|
| Notes |
Data contained in these files has been subjected to quality control standards
imposed by the investigator. The user of this data should be aware that, while efforts have
been taken to ensure that these data are of the highest quality, there is no guarantee of
perfection for the data contained herein and the possibility of errors exists. If you
encounter questionable data, please contact the MCM LTER data manager corrected or qualified.
Thus, these data may be modified and future data will be appended.
|
|
| License and Usage Rights: |
| |
| MCM LTER data may be used freely with the following restrictions: |
The Principal Investigator be sent a notice stating reasons for acquiring any
data and a description of the publication intentions.
The Principal Investigator of the data set be sent a copy of the report or
manuscript prior to submission and be adequately cited in any resultant
publications.
A copy of any resultant publications should be sent to the McMurdo data
manager and principal investigator.
The end-user follow the guidelines set forth in the LTER Network Data Access
Policy, Data Access Requirements, and General Data Use Agreement found at
http://www.mcmlter.org/data_guidelines.htm
|
|
| Geographic Coverage: |
|
Geographic Description: | Study areas were located in the McMurdo Dry Valleys of southern Victoria
Land, Antarctica (in the western coast of the Ross Sea at 77oS). Specific latitudes and
longitudes for each stream gauge can be found in the this web site. |
|
Bounding Coordinates:
|
| West: | 162 degrees
|
| East: | 163.6 degrees
|
| North: | -77.2 degrees
|
| South: | -77.8 degrees
|
|
Mimimum Altitude: | 0 meter |
|
Maximum Altitude: | 1000 meter |
|
| Temporal Coverage: |
|
Begin:
|
|
|
End:
|
|
|
|
| Maintenance: |
|
Description:
|
The 'discrete_stream_gauge' table was created by Harry House in early 1994. It
was first stored in an INGRES database, but was converted to ORACLE format in early 1996.
Modifications were generally made each year after the initial creation in the early part of
the year. It was transferred to INSTAAR in late 1997, where it was stored in a Microsoft
Access database, and presented on the web in ascii, comma delimited files.
In October, 1999 Mike Gooseff submitted the 1997-98 data to Denise Steigerwald (the data manager) in ascii,
comma delimited files. In order to prepare the files for use in an Oracle database as well as
a geographic information system, Denise created a field for "strmgageid" (stream gauge id),
converted any time fields of 24:00 to 0:00 on the following day, combined the date and time
fields into one date/time field, and separated the data into separate files for each station.
Data which was previously presented according to decade collected is now presented according
to location, and contains records from the start date of monitoring for a given stream gauge.
The resulting files are available through the links provided above.
In order to make the data more relational / useful in Oracle and ArcInfo, and generate links between
different data and metadata fields, a dataset code was added to these files.
|
|
|
Frequency:
| |
| Contact: |
|
Organization: | McMurdo Dry Valleys LTER |
|
Position: | Data Manager |
|
Address: |
| Byrd Polar Research Center , |
| 108 Scott Hall, |
| 1090 Carmack Rd, |
| Columbus, OH 43210-1002 USA |
|
|
Phone:
|
|
|
Email Address:
|
|
|
| Publisher: |
|
Organization: | McMurdo Dry Valleys LTER |
|
Address: |
| Byrd Polar Research Center , |
| 108 Scott Hall, |
| 1090 Carmack Rd, |
| Columbus, |
| Columbus, OH 43210-1002 USA |
|
|
Phone:
|
|
|
| Methods Info: |
| Step 1: |
|
|
Description:
|
|
Campbell CR10 dataloggers were used to record stream stage, water temperature,
and conductivity in a network of stream gauges. Stage is monitored with pressure
transducers; PSS-1 and PS-2 models form Paroscientific Corporation, and Accubars
from Sutron Corporation. The pressure transducers measure the backpressure in orifice
lines set into or above controls in the stream channel. In addition, some of the sites
monitor water temperature and conductivity with either USGS minimonitor probes, or
Campbell temperature/conductivity probes.
Ratings are developed for the stage/discharge relationship at each site by measuring
streamflow with current meters or portable flumes, according to standard USGS methods.
Datum corrections to the stage are determined by periodically surveying the elevation of the
orifice line to the control and nearby reference marks. Calibrations for the temperature and
conductivity are assessed by measuring these parameters with portable field meters while
simultaneously noting the readings from the gauge probes.
Data is downloaded into Campbell storage modules, and retrieved into pcs. From there, the
data is sent to a USGS computer, where time discrepancies are resolved, and the data is
loaded into ADAPS, a database system developed in the USGS for maintaining and processing
water data. A determination for each site as to when the stream was flowing and when it was not is made.
For water temperature and conductivity, bad data is deleted. Variable shifts are determined based
on field calibration measurements, and other indicators. The shifts are applied to the remaining
good data inside of ADAPS. The data is pulled out of ADAPS, and reformatted for input into ORACLE.
Cases of water temperature below reasonable values are set to lower limits. A quality code is
assigned to every value. The resulting data is uploaded into the ORACLE and the McMurdo database.
For stage/discharge, bad data is deleted. Survey data is reviewed to compute weir elevations and
datum corrections. A rating curve is developed graphically, based on available data, and entered
into ADAPS. All applicable shifts and datum corrections are entered into ADAPS. All corrections
and ratings are run against the good stage data to compute the discharge at each recording interval.
The data is pulled out of ADAPS, and reformatted for input into ORACLE. A quality code is assigned
to every value. The resulting data is uploaded into ORACLE and the McMurdo database.
|
|
|
|