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CF004
Stream, hyporheic, and ground water chemistry of McRae Creek in the Andrews Experimental Forest, 1989 to 1992
Steven
M.
Wondzell
Pacific Northwest Research Station; Corvallis Forestry Sciences Lab; 3200 SW Jefferson Way
Corvallis
OR
97331
USA
541-758-8753
steve.wondzell@usda.gov
https://www.fs.fed.us/pnw/lwm/aem/people/wondzell.html
http://orcid.org/0000-0002-5182-5796
Steven
M.
Wondzell
Pacific Northwest Research Station; Corvallis Forestry Sciences Lab; 3200 SW Jefferson Way
Corvallis
OR
97331
USA
541-758-8753
steve.wondzell@usda.gov
https://www.fs.fed.us/pnw/lwm/aem/people/wondzell.html
http://orcid.org/0000-0002-5182-5796
Principal Investigator
Steven
M.
Wondzell
Pacific Northwest Research Station; Corvallis Forestry Sciences Lab; 3200 SW Jefferson Way
Corvallis
OR
97331
USA
541-758-8753
steve.wondzell@usda.gov
https://www.fs.fed.us/pnw/lwm/aem/people/wondzell.html
http://orcid.org/0000-0002-5182-5796
Abstractor
Steven
M.
Wondzell
Pacific Northwest Research Station; Corvallis Forestry Sciences Lab; 3200 SW Jefferson Way
Corvallis
OR
97331
USA
541-758-8753
steve.wondzell@usda.gov
https://www.fs.fed.us/pnw/lwm/aem/people/wondzell.html
http://orcid.org/0000-0002-5182-5796
Creator
2016-12-20
Measurements of nitrogen concentrations from grab samples collected from McRae Ck, and from a network of shallow wells located adjacent to the stream. All samples were analyzed for NO3 and NH4. Some samples include additional data such as DON and Total N, and sometimes temperature and dissolved oxygen concentrations were measured at the time the water samples were collected for analysis.
Data were collected from September 1989 to September 1992 on an irregular basis to sample both baseflow periods and storm events across seasons of the year.
Water samples were collected from the stream as grab samples; samples from shallow wells were pumped into a small flask using a vacuum pump and then transferred into a sample bottle.
water chemistry
stream ecology
storms
nitrogen cycling
disturbance
physical processes
hydrologic processes
inorganic nutrients
groundwater
hyporheic zone
aquatic ecosystems
LTER controlled vocabulary
riparian ecosystems
Andrews Experimental Forest site
thesaurus
disturbance
inorganic nutrients
LTER core research areas
Greenberg, A. E., J. J. Connors, and D. Jenkins (eds). 1980. Standard methods for the examination of water and wastewater. American Public Health Association, Washington D.C.15th edition. 1134 p.
Wondzell, S. M. and F. J. Swanson. 1996. Seasonal and storm dynamics of the hyporheic zone of a 4th-order mountain stream. I: Hydrologic processes. The J. of the North American Benthological Society 15:3-19
Wondzell, S., and F. J. Swanson. 1996. Seasonal and storm dynamics of the hyporheic zone of a 4th-order mountain stream. II: Nitrogen cycling. The Journal of the North American Benthological Society 15:20-34
Wondzell, S. 1994. Flux of ground water and nitrogen through the floodplain of a fourth-order stream. Ph.D. Thesis. Oregon State University, Corvallis OR. The following samples are flagged (variable name FLAG, coded XX) as non-typical in the data set. You can find a short description of each sample below:
Samples 117, 128, 129, 130, 181, 182, 197, 201, 202, 203, 216, 232, 263, 324, 398, 420, 421, 792, 795, 803, 804:
117 stream water sample collected with vacuum flask to test for sample contamination (compare with sample 116)
128 grab sample from McRae Creek collected 100 m downstream of 116 to look for spatial variability in stream nitrogen concentration. Collected in a zone of complex channels braided around many small islands vegetated with alder (Alnus rubra), in an area affected by log jams. (compare with sample 116)
129 grab sample from McRae Creek collected 225 m downstream of 116 to look for spatial variability in stream nitrogen concentration. Collected at the bottom of a reach with very dense alder forming complete canopy closure over the stream channel. (compare with sample 116)
130 grab sample from McRae Creek collected 275 m downstream of 116 to look for spatial variability in stream nitrogen concentration. Collected below the junction with the tiny tributary channel denoted Trib-00 (compare with sample 116)
181 grab sample collected from soil pit located on the terrace - eventually a well was established through the bottom of this soil pit becoming collection location PA72
182 grab sample collected from Trib-00 but at its mouth where it joins McRae Creek (compare to 191 grab sample collected from Trib-00 at the head of the alluvial fan built onto the McRae Creek floodplain which is the normal sample location for Trib-00)
197 (like sample 181) grab sample collected from soil pit located on the terrace - eventually a well was established through the bottom of this soil pit becoming collection location PA72
201 grab sample from Trib-A2 collected down tributary channel, far from normal collection location
202 (like sample 181) grab sample collected from soil pit located on the terrace - eventually a well was established through the bottom of this soil pit becoming collection location PA72
203 grab sample from seep adjacent to Well W60A - too little water in well for sample
216 stream water sample collected with vacuum flask to test for sample contamination (compare with sample 215)
232 pumped sample of D.I. collected in the field, stored on ice, transported to lab, filtered and analyzed to check for possible sample contamination
263 stream water sample collected with vacuum flask to test for sample contamination (compare with sample 266)
324 collected from McRae Creek adjacent to well PN31
398 collected from McRae Creek adjacent to well PN31
420 repeat pumped sample from W07A (compare with sample 434)
421 stream water sample collected with vacuum flask to test for sample contamination (compare with sample 435)
792 sample bottle filled with D.I. water from laboratory sink and mixed into sampling stream. Not exposed to field conditions, but filtered through filtering funnel with Whatmann GF/C filter to check for contamination in filtering process
795 originally collected in a leaky sample bottle and transfered to a second non-leaky bottle
803 sample bottle filled by pumping D.I. water from 1.0 liter HDPE bottle through the vacuum flask in the field. Sample bottle rinsed with pumped water, and final sample collected, stored on ice, transported to lab, filtered and analyzed to check for contamination
804 repeat grab sample from McRae Creek (compare with sample 834)
Samples 278-321 and 348-392 were collected in a well network located on Lookout Creek in conjunction with a stream fertilization experiment and are not included in this data set, despite sequential numbering. Additionally, samples 318-321 and 375-382 were collected for an experiment to test the effect of freezing on NH4 and NO3 concentrations. Related PublicationsWondzell, Steve. 1994. Flux of ground water and nitrogen through the floodplain of a fourth-order stream. Corvallis, OR: Oregon State University. 113 p. Ph.D. dissertation.Wondzell, Steven M.; Swanson, Frederick J. 1996. Seasonal and storm dynamics of the hyporheic zone of a 4th-order mountain stream. I: Hydrologic processes. Journal of the North American Benthological Society. 15(1): 3-19.Wondzell, Steven M.; Swanson, Frederick J. 1996. Seasonal and storm dynamics of the hyporheic zone of a 4th-order mountain stream. II: Nitrogen cycling. Journal of the North American Benthological Society. 15(1): 20-34.Related FilesTitle: Well Location MapDescription: Locations of wellsURL: https://andrewsforest.oregonstate.edu/data/studies/hf10/welltran.jpgTitle: Well Locations on gravel barDescription: Well Locations on gravel barURL: https://andrewsforest.oregonstate.edu/data/studies/hf10/gravelba.jpg
Data Use Agreement:
The re-use of scientific data has the potential to greatly increase communication, collaboration and synthesis within and among disciplines, and thus is fostered, supported and encouraged. This Data Set is released under the Creative Commons license CC BY "Attribution" (see: https://creativecommons.org/licenses/by/4.0/). Creative Commons license CC BY - Attribution is a license that allows others to distribute, remix, tweak, and build upon your work (even commercially), as long as you are credited for the original creation. This license accommodates maximum dissemination and use of licensed materials.
It is considered professional conduct and an ethical obligation to acknowledge the work of other scientists. The Data User is asked to provide attribution of the original work if this data package is shared in whole or by individual parts or used in the derivation of other products. A recommended citation is provided for each Data Set in the Andrews LTER data catalog (see: http://andlter.forestry.oregonstate.edu/data/catalog/datacatalog.aspx). A generic citation is also provided for this Data Set on the website https://portal.edirepository.org in the summary metadata page. Data Users are thus strongly encouraged to consider consultation, collaboration and/or co-authorship with the Data Set Creator.
While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed and all data are made available "as is." The Data User should be aware, however, that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data.
General acknowledgement: Data were provided by the HJ Andrews Experimental Forest research program, funded by the National Science Foundation's Long-Term Ecological Research Program (DEB 1440409), US Forest Service Pacific Northwest Research Station, and Oregon State University.
https://andlter.forestry.oregonstate.edu/data/abstract.aspx?dbcode=CF004
1989-09-14
1993-03-25
To monitor changes in nitrogen concentrations in stream water, hyporheic water and groundwater among seasons of the year and during storms in the fall, winter and spring. Data were combined with estimated fluxes of hyporheic water and groundwater through the study site to estimate nitrogen inputs to the stream reach.
An update history is logged and maintained with each new
version of every dataset.
notPlanned
Original metadata creation
Version1
2000-02-22
Moved database to SQL server
Version2
2005-04-13
Restructured the dataset to prepare for upload into PASTA. Added DBCODE and ENTITY. Created a DATE_TIME field for year, mont,h, day and time. Deleted year and julian day. Added NA to all coded fields to replace blanks. Created an enumerated field out of SEASON. Needed to create a primary key; date_time, field_id, duplicate. Ran QC. Created new SQL structure and appended data. Need to create new CSV files.
Version6
2016-12-20
Information Manager
Andrews Forest LTER Program
US Forest Service Pacific Northwest Research Station
3200 SW Jefferson Way
Corvallis
OR
97331
hjaweb@fsl.orst.edu
http://andrewsforest.oregonstate.edu/
Donald
L.
Henshaw
Pacific Northwest Research Station; Corvallis Forestry Sciences Lab; 3200 SW Jefferson Way
Corvallis
Oregon
97331
hja_admin@lists.oregonstate.edu
http://orcid.org/0000-0001-5952-4528
Andrews Forest LTER Site
Forest Ecosystems and Society Department in Forestry
Oregon State University
201K Richardson Hall
Corvallis
OR
97331-5752
(541) 737-8480
lterweb@fsl.orst.edu
http://andrewsforest.oregonstate.edu/
Field Methods - CF004
Wells and well transects:
Two types of wells were used in this study: observation wells to measure water table elevations and sample wells to collect interstitial water. Casings for observation wells were made from PVC pipe and screened by drilling 0.32 cm diameter holes into the bottom 50 cm of each PVC pipe, at an approximate density of 1 hole/cm2. Casings for sample wells were constructed from 45-cm lengths of 2.54-cm diameter, porous, high density polyethylene pipe (HDPE) with a mean pore diameter of 20 µm. A length of PVC pipe was added to extend the casing above the ground surface.
All wells were driven by hand because the study site had no road access. Large cobbles and boulders throughout the study site hindered well placement so that the deepest wells penetrated only 2.5 m below the ground surface. Wherever possible, wells were placed in holes driven at least 50 cm below the surface of the water table at summer baseflow. Holes were back filled with the soil originally removed and, if necessary, additional fill was taken from nearby soil pits or recent root-throw pits. Following installation of the wells, back fill was washed and entrained sediments were removed from the well casing by repeated pumping.
A single transect of wells was established during late summer in 1989 as a pilot study. Additional transects of wells were installed during the summer of 1990 and an additional 18 wells were established on, and adjacent to, the gravel bar during 1991 and 1992. Nine sample wells were placed adjacent to observation wells so that water table levels could be measured concurrently with the collection of water samples during storm events. During the summer of 1991, about half of the observation wells were retro-fitted with evacuation tubes so that water samples could be collected over a much larger area during base flow periods.
Water samples and chemical analyses:
Water samples were collected from wells to compare changes in dissolved nitrogen concentrations among seasons and within storm events. Sampling was concentrated from mid summer to early fall and during fall storms. Samples were also collected in mid winter, in early spring, and during a single late-winter storm. Water table depths were recorded from observation wells less then 24 h before collecting base flow water samples after which wells were pumped dry and allowed to refill before collecting samples. Dissolved oxygen and temperature were also measured in each observation well using a YSI Model 51A dissolved oxygen meter and a YSI probe in 1991 and 1992. Water samples were only collected from the sample wells during storms because observation wells were used to monitor changes in water table levels and withdrawing water to collect samples would have changed the water level in the wells. Twenty-four hours before a forecasted storm, all sample wells were pumped dry and allowed to refill. Wells were not re-evacuated between sample collections during a storm.
Surface water samples (stream, tributaries, and secondary channel) were collected as Agrab samples@, holding a clean, acid washed HDPE bottle just under the surface of the stream and allowing it to fill. Bottles were rinsed 3 times with water samples before collecting the final sample. Head space above the water sample was evacuated and samples were stored on ice. Water samples were collected from wells using a vacuum flask. All wells were instrumented with a permanent evacuation tube to limit contamination and the introduction of foreign materials into the wells when sampling during storms. To collect a sample, the evacuation tube was connected to the vacuum flask and a vacuum was applied using a small hand pump. The vacuum flask was never rinsed with sample water because if a small amount of water was evacuated from the well and used to rinse the flask, large amounts of sediment would be stirred up in the well. Thus, the entire sample was collected immediately. Samples were collected in clean, acid washed HDPE bottles that were rinsed with sample water from the vacuum flask before transferring the final sample to the bottle. Head space above the water sample was evacuated and samples were stored on ice. The vacuum flask was rinsed 3 times with D.I. water immediately before collecting a sample from the next well.
Samples were categorized by landform, season, and a storm index variable (FLOINDEX). Samples from wells were categorized by landform on which the well was located (STREAMBED, GRAVEL (gravel bar), FLOOD (flood plain), TERRACE, FAN (alluvial fan) and SEEP (a well located in a seep or spring at the base of the terrace). and grab samples of surface water were categorized as either STREAM, TRIB (tributary), or STLET (secondary channel). Samples from early fall, collected before the start of the rainy season, were considered summer samples. Each season was subdivided into periods of base flow or storm flow. The period of annual low flow in late summer was designated as LOW (low base flow) to distinguish from other base flow periods. Hydrographs of either stream discharge or well records of water table elevations were used to subdivided non-baseflow periods as either the RISE (rising leg), PEAK, and FALL (falling leg) of the hydrograph. Pre-storm samples were collected immediately before the storm and post-storm samples were collected once the stream returned to base flow conditions after the end of the storm. These samples were designated as PRE and POST, respectively, but were also used in analyses of base flow trends.
Laboratory Methods - CF004
Samples were filtered with acid washed glass microfibre filters (Whatman GF/C, retention of 1.2 µm). The analysis for total Kjeldahl nitrogen (TKN) generally followed the Kjeldahl procedure using a H2SO4 digestant and CuSO4/KCl catalyst, but with Nessler finish (Greenberg et al. 1980). NO3- and NH4+ were analyzed on an Technicon Autoanalyzer II. The analysis for NO3- (procedure 418F, Greenberg et al. 1980) was modified following Technicon's Industrial Method No. 100-70W distributed in 1973 (Technicon Industrial Systems, Tarrytown NY 10591). The analysis for NH4+ followed procedure 417F of Greenberg et al. (1980). Dissolved organic nitrogen (DON) was the difference between TKN and NH4+. Total dissolved nitrogen (TDN) was the sum of NO3-, NH4+, and DON.
The McRae Creek study site was about 200 m long and 80 m wide and was located along the eastern bank of an unconstrained stream reach (see Figure). A complex of landforms is present within the study site, including a recently formed gravel bar, older floodplain surfaces, and terraces. Sediment of the gravel bar and stream channel is a poorly sorted mix of sand, gravel, cobbles, and boulders more than 1.5 m in depth. A layer of rounded, stream-worked cobbles and boulders, 10 to 50 cm in diameter, is present at 1 to 3 m depth within the floodplain. The sediment overlying this layer varies in texture from loam to fine sand. A small seep is present along the boundary between the terrace and floodplain, but is not gauged. There is no surface flow from this seep during late summer. Flows increase during the winter rainy season, and peak during storms. Sampling frequency: irregular
A network of wells was installed on a gravel bar and a portion of the adjacent floodplain of McRae Creek (see Figure) between 1989 and 1992. Water samples were collected from the well network to monitor changes in dissolved nitrogen concentrations in both ground water and the hyporheic water among seasons and within storms.
McRae Creek
-122.20859020
-122.13943300
44.27311600
44.23328700
H. J. Andrews Experimental Forest
Sherri
L.
Johnson
US Forest Service ;Pacific NW Research Station ;3200 SW Jefferson Way
Corvallis
OR
97331
USA
541-758-7771
sherri.johnson2@usda.gov
sherri.johnson@oregonstate.edu
https://www.fs.fed.us/research/people/profile.php?alias=sherrijohnson
http://orcid.org/0000-0002-4223-3465
Principal Investigator
Julia
A.
Jones
Oregon State University;Department of Geosciences; Wilkinson Hall 104
Corvallis
OR
97331-5506
USA
(541) 737-1224
Julia.Jones@oregonstate.edu
geojulia@comcast.net
http://ceoas.oregonstate.edu/profile/jones/
http://orcid.org/0000-0001-9429-8925
Principal Investigator
Hannah
Gosnell
Geosciences;Oregon State University;260 Wilkinson Hall
Corvallis
OR
97331-5506
USA
541-737-1222
gosnellh@geo.oregonstate.edu
http://ceoas.oregonstate.edu/profile/gosnell/
Principal Investigator
Matthew
G
Betts
Department of Forest Ecosystems and Society; 201E Richardson Hall; College of Forestry; Oregon State University
Corvallis
OR
97331
(541) 737-3841
matt.betts@oregonstate.edu
http://www.fsl.orst.edu/flel/index.htm
http://orcid.org/0000-0002-7100-2551
Principal Investigator
Michael
P.
Nelson
Department of Forest Ecosystems and Society; 201K Richarson Hall; College of Forestry; Oregon State University
Corvallis
OR
97331
541-737-9221
mpnelson@oregonstate.edu
http://www.michaelpnelson.com
http://orcid.org/0000-0001-6917-4752
Principal Investigator
The Andrews Forest is situated in the western Cascade Range of Oregon, and covers the entire 15,800-acre (6400-ha) drainage basin of Lookout Creek. Elevation ranges from 1350 to 5340 feet (410 to 1630 m). Broadly representative of the rugged mountainous landscape of the Pacific Northwest, the Andrews Forest contains excellent examples of the region's conifer forests and associated wildlife and stream ecosystems. These forests are among the tallest and most productive in the world, with tree heights of often greater than 250 ft (75 m). Streams are steep, cold and clean, providing habitat for numerous aquatic organisms.
CF00401
CF00401
Hyporheic and stream water chemistry of McRae Creek:
CF00401.csv
104309
b4fe67a9bb44015ad702b1f3a6e7f61f
1
\r\n
column
,
"
https://andlter.forestry.oregonstate.edu/data/register/dataaccess.aspx?docid=CF00401_v2.csv
DBCODE
FSDB Database code
char(5)
CF004
FSDB database code CF004
ENTITY
Entity number
numeric(2,0)
number
1
natural
1.0000
1.0000
CCAL_ID
Unique sample id number from the ccal lab
numeric(3,0)
number
1.000000
integer
101.0000
899.0000
DUPLICATE
Duplicated lab analysis for qa/qc
char(2)
D
Duplicate lab analysis
R
Repeated lab analysis
RD
Duplicate in repeat analysis
NA
Not indicated
FLAG
Special collection - see comments in supplemental information
char(2)
Special collection - see comments in supplemental information
FIELD_ID
Number assigned in the field to the sample
numeric(4,0)
number
1.000000
integer
1.0000
1275.0000
DATE_TIME
Date and time of sample collection
datetime
YYYY-MM-DD hh:mm:ss
9/14/1989 7:30:00 AM
3/25/1993 12:38:00 PM
E_TIME
Elapsed time (in years) since beginning of the study where 0.000000 is 1 jan 1989.
numeric(8,6)
year (yyyy)
0.000000
real
0.7000
4.2400
LOCATE
Location of sample collection
char(8)
FIELD-B
Di water field blank
GB02
Observation well on gravel bar - see map for location
GB03
Observation well on gravel bar - see map for location
GB04
Observation well on gravel bar - see map for location
GB05
Observation well on gravel bar - see map for location
GB06
Observation well on gravel bar - see map for location
GB07
Observation well on gravel bar - see map for location
GB08
Observation well on gravel bar - see map for location
GB09
Observation well on gravel bar - see map for location
GB10
Observation well on gravel bar - see map for location
GB11
Observation well on gravel bar - see map for location
GB12
Observation well on gravel bar - see map for location
GB13
Observation well on gravel bar - see map for location
GB14
Observation well on gravel bar - see map for location
GB15
Observation well on gravel bar - see map for location
GB16
Observation well on gravel bar - see map for location
GB17
Observation well on gravel bar - see map for location
PA03
Observation well - see map for location
PA07
Observation well - see map for location
PA11
Observation well - see map for location
PA14
Observation well - see map for location
PA17
Observation well - see map for location
PA72
Observation well - see map for location
PB30
Observation well - see map for location
PE18
Observation well - see map for location
PE23
Observation well - see map for location
PE27
Observation well - see map for location
PE30
Observation well - see map for location
PE37
Observation well - see map for location
PN31
Observation well - see map for location
PP20
Observation well - see map for location
PP28
Observation well - see map for location
PP34
Observation well - see map for location
PP41
Observation well - see map for location
PQ10
Observation well - see map for location
PS04
Observation well - see map for location
PS29
Observation well - see map for location
PS40
Observation well - see map for location
PV05
Observation well - see map for location
PV19
Observation well - see map for location
PV31
Observation well - see map for location
PV40-A
Observation well - see map for location
PX09
Observation well - see map for location
PX18
Observation well - see map for location
PX22
Observation well - see map for location
PX30
Observation well - see map for location
PX40
Observation well - see map for location
W00A
Sample well - see map for location
W007
Sample well - see map for location
W07A
Sample well - see map for location
W24A
Sample well - see map for location
W32A
Sample well - see map for location
W51A
Sample well - see map for location
W21E
Sample well - see map for location
W37E
Sample well - see map for location
W10X
Sample well - see map for location
W30X
Sample well - see map for location
W60X
Sample well - see map for location
STLET@E
Grab sample location for collection of survace water - see map
STREAM
Grab sample location for collection of survace water - see map
STREAM@N
Grab sample location for collection of survace water - see map
POOL@A
Grab sample location for collection of survace water - see map
POOL@D
Grab sample location for collection of survace water - see map
POOL@E
Grab sample location for collection of survace water - see map
TRIB-00
Grab sample location for collection of survace water - see map
TRIB-A1
Grab sample location for collection of survace water - see map
TRIB-A2
Grab sample location for collection of survace water - see map
PP42
Not on map
H2ODEPTH
Depth of water, measured from top of well, or height of water in stream
numeric(6,2)
centimeters
0.010000
real
0.5300
274.1000
H2OELEV
Elevation of water table or stream stage where all locations are measured relative to arbitrarily lcocated benchmark. gives true elev dif btwn sites.
numeric(6,1)
centimeters
0.100000
real
-310.2000
612.4000
LANDFORM
Landform within the study site where samples were located
char(9)
FAN
Alluvial fan
FLOOD
Flood plain
GRAVEL
Gravel bar
SEEP
Seep or spring
STLET
Back channel
STREAM
Mcrae creek
STREAMBED
Streambed of mcrae creek
TERRACE
Terrace
TRIB
Tributary stream
NA
Not indicated
SEASON
Season of year
char(6)
FALL
Fall
SPRING
Spring
SUMMER
Summer
WINTER
Winter
NA
Not indicated
FLOINDEX
State of stream hydrograph at time of sample collection
char(4)
BASE
Base flow
FALL
Falling leg of hydrograph
LOW
Annual low flow
PEAK
Peak of storm hydrograph
POST
Post-storm sample
PRE
Pre-storm sample
RISE
Rising leg of hydrograph
NA
Not indicated
TEMP
Temperature of water at time of collection
numeric(4,1)
degrees Celsius
0.100000
real
4.2000
14.7000
OXYGEN
Dissolved oxygen concentration in water at time of collection
numeric(4,1)
milligrams per liter
0.100000
real
1.0000
12.1000
TURBID
Denotes turbid samples after filtering
char(3)
T
Turbid (after filtering)
N-T
Not turbid
NA
Not indicated
COLOR
Denotes colored (not clear or turbid) samples after filtering
char(3)
C
Colored after filtering
N-C
Not colored
NA
Not indicated
SEDIMENT
Ranking of amount of sediment left on filter paper after filtering the sample through whatman gf/c filter
char(1)
1
Little to no sediment left on sample paper after filtering
2
Some sediment left on sample paper after filtering
3
More sediment left on sample paper after filtering
4
Even more sediment left on sample paper after filtering
5
Very sediment rich, usually required several filters to filter entire sample
9
Not indicated
TKN
Total kjeldahl nitrogen concentration
numeric(5,3)
milligrams per liter
0.001000
real
0.0000
0.4500
NH4
Amonium concentration (may include nh3 if present in sample)
numeric(5,3)
milligrams per liter
0.001000
real
0.0000
0.7430
NO3
Nitrate concentration
numeric(5,3)
milligrams per liter
0.001000
real
0.0000
0.6370
DON
Dissolved organic nitrogen concentration calculated by difference between tkn and nh4
numeric(5,3)
milligrams per liter
0.001000
real
0.0000
0.1310
TOTALN
Total dissolved nitrogen calculated by sum of nh4, no3, and don
numeric(5,3)
milligrams per liter
0.001000
real
0.0000
0.4520
PRIMARY
CF00401.DUPLICATE
CF00401.FIELD_ID
CF00401.DATE_TIME
NOTNULL
CF00401.COLOR
CF00401.DUPLICATE
CF00401.FLOINDEX
CF00401.LANDFORM
CF00401.LOCATE
CF00401.SEDIMENT
CF00401.TURBID
CF00401.SEASON
CF00401.E_TIME
CF00401.FIELD_ID
CF00401.DBCODE
CF00401.ENTITY
CF00401.DATE_TIME
848
year (4 character) portion of date
centimeters; .01 meters
Degrees Celsius; a common unit of temperature; constantToSI=273.18
milligrams per liter
dimensionless number, i.e., ratio, count