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Investigation:

ND-11 (Lehmann / Passos / Couto)

LBA Dataset ID:

LBA_ND11_Stream

Originator(s):

1. JOHNSON, M.S.
2. LEHMANN, J.
3. RIHA, S.J.
      4. FILHO NOVAES, J.P.
5. COUTO, E.G.

Point(s) of Contact:

ORNL DAAC User Services Office Oak Ridge National Laboratory Oak Ridge, Tennessee 37 (ornldaac@ornl.gov)

Dataset Abstract:

This data set contains streamwater concentrations of pH, specific conductivity, base cations, carbon (dissolved organic carbon (DOC), particulate organic carbon (POC) and bicarbonate alkalinity) and silica for four headwater streams in the seasonally dry Amazon. Data are provided in one comma-separated ASCII file. This hydrologic study of four headwater watersheds was conducted in an undisturbed forest near Juruena, Mato Grosso in the seasonally dry, southern Amazon. The small catchments range in size from 0.85 to 1.9 ha. Stream water samples were collected weekly during rainy seasons and biweekly during the dry seasons. Stream water concentrations of base cations, silica, electrical conductivity, DOC, and alkalinity varied inversely with discharge. While there was variation among the watersheds, the concentration-discharge patterns were consistent for each of the four watersheds. Discharge data are not included in this data set and will be archived separately.

Beginning Date:

2003-11-18

Ending Date:

2006-05-18

Metadata Last Updated on:

2009-03-31

Data Status:

Archived

Access Constraints:

PUBLIC

Data Center URL:

http://daac.ornl.gov/

Distribution Contact(s):

ORNL DAAC User Services Office Oak Ridge National Laboratory Oak Ridge, Tennessee 37 (ornldaac@ornl.gov)

Access Instructions:

PUBLIC

Data Access:

IMPORTANT: The LBA-ECO Project website is no longer being supported. Links to external websites may be inactive. Final data products from the LBA project can be found at the ORNL DAAC. Please follow the fair use guidelines found in the dataset documentation when using or citing LBA data.
Datafile(s):

LBA-ECO ND-11 Stream Carbon and Nutrients, Mato Grosso, Brazil: 2003-2006 :  http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=921

Documentation/Other Supporting Documents:

LBA-ECO ND-11 Stream Carbon and Nutrients, Mato Grosso, Brazil: 2003-2006 :  http://daac.ornl.gov/LBA/guides/ND11_Stream_Nutrients.html

Citation Information - Other Details:

Johnson, M.S., J. Lehmann, S.J. Riha, J.P. Novaes Filho and E.G. Couto. 2009. LBA-ECO ND-11 Stream Carbon and Nutrients, Mato Grosso, Brazil: 2003-2006. Data set. Available on-line [http://daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A. doi:10.3334/ORNLDAAC/921

Keywords - Theme:

Parameter Topic Term Source Sensor
ALKALINITY TERRESTRIAL HYDROSPHERE WATER QUALITY/WATER CHEMISTRY LABORATORY PH METER
PH TERRESTRIAL HYDROSPHERE WATER QUALITY/WATER CHEMISTRY LABORATORY PH METER
WATER ION CONCENTRATION TERRESTRIAL HYDROSPHERE WATER QUALITY/WATER CHEMISTRY LABORATORY ION CHROMATOGRAPH

Uncontrolled Theme Keyword(s):  ALKALINITY, BASE FLOW, CALCIUM, DISSOLVED ORGANIC CARBON, EC, HEADWATER, LOW FLOW, MAGNESIUM, MICROBASINS, MICROCATCHMENT, MICROWATERSHED, PARTICULATE ORGANIC CARBON, PH, POTASSIUM, SILICA, SODIUM, WATERSHED

Keywords - Place (with associated coordinates):

Region
(click to view profile)
Site
(click to view profile)
North South East West
  MATO GROSSO -10.42490 -10.42490 -58.75970 -58.75970

Related Publication(s):

Johnson, M.S., J. Lehmann, E.C. Selva, M. Abdo, S.J. Riha, and E.G. Couto (2006). Organic carbon fluxes within and streamwater exports from forested headwater catchments in the southern Amazon. Hydrological Processes 20: 2599-2614.

Johnson, M.S., J. Lehmann, E.G. Couto, J.P. Novaes, and S.J. Riha. 2006. DOC and DIC in flowpaths of Amazonian headwater catchments with hydrologically contrasting soils. Biogeochemistry 81(1):45-57.

Johnson, M.S., J. Lehmann, S.J. Riha, A.V. Krusche, J.E. Richey, J.P.H.B. Ometto, and E.G. Couto. 2008. CO2 efflux from Amazonian headwater streams represents a significant fate for deep soil respiration. Geophysical Research Letters 35(L17401) doi10.1029/2008GL034619.

Data Characteristics (Entity and Attribute Overview):

Data Characteristics:

One comma-delimited ASCII file is provided. Values of -9999 in ASCII file indicate missing values. Headwater stream designations are shown.



Data file: base-flow.csv



Column Parameter Description

---column 1: Stream; identifier for headwater stream

---column 2: Date; sample collection date in yyyy/mm/dd format

---column 3: pH; baseflow stream water pH determined in situ

---column 4: EC; baseflow stream water electrical conductivity (EC) determined in situ(uS/cm)

---column 5: Na; baseflow stream water sodium concentration (mg/L)

---column 6: K; baseflow stream water potassium concentration (mg/L)

---column 7: Mg; baseflow stream water magnesium concentration (mg/L)

---column 8: Ca; baseflow stream water calcium concentration (mg/L)

---column 9: DOC; baseflow stream water dissolved organic carbon (DOC, <0.7 um) concentration (mg/L)

---column 10: POC; baseflow stream water fine particulate organic carbon (POC, 0.7 um - 2 mm)concentration (mg/L)

---column 11: SiO2; baseflow stream water silica concentration (mg/L)

---column 12: pH_lab; baseflow stream water pH determined in lab after filtration and equilibration

---column 13: Alk; baseflow stream water alkalinity determined in lab after equilibration (mg C/L from HCO3-)





Example Data Records





Stream,Date,pH,EC,Na,K,Mg,Ca,DOC,POC,SiO2,pH_lab,Alk

B1,2003/11/18,6.14,54,2.98,1.83,1.22,2.32,4.14,0.47,-9999,-9999,-9999

B1,2003/11/25,5.46,45,3.08,2.46,1.41,2.49,3.13,0.18,-9999,-9999,-9999

B1,2003/12/01,5.43,48,1.44,1.22,0.69,1.10,1.34,-9999,-9999,-9999,-9999



...





B4,2006/04/05,6.28,10,-9999,-9999,-9999,-9999,0.52,-9999,3.0,6.10,1.60

B4,2006/04/27,5.44,11,-9999,-9999,-9999,-9999,0.37,-9999,-9999,6.38,1.60

B4,2006/05/18,5.60,15,-9999,-9999,-9999,-9999,0.48,-9999,5.1,6.36,2.00

Data Application and Derivation:

Data sets contain results from field study of stream water nutrient and carbon contents at baseflow for four headwater watersheds.

Quality Assessment (Data Quality Attribute Accuracy Report):

Quality Assessment:

No known problems with data.

Process Description:

Data Acquisition Materials and Methods:

Stream samples were collected as grab samples, filtered using glass fiber filters, and analyzed using ion chromatography (base cations), total carbon analyzer (DOC and POC), and colorimetrically (silica). Alkalinity determined by titration to fixed endpoint (pH = 4.5) and expressed as HCO3- (mg C/L). Stream water pH and specific conductivity recorded in field (in situ) using hand-held, combination pH / EC meter.

References:

Johnson, M.S., J. Lehmann, E.G. Couto, J.P. Novaes, and S.J. Riha. 2006a. DOC and DIC in flowpaths of Amazonian headwater catchments with hydrologically contrasting soils. Biogeochemistry 81(1):45-57.doi: 10.1007/s10533-006-9029-3.



Johnson, M.S., J. Lehmann, E.C. Selva, M. Abdo, S.J. Riha, and E.G. Couto 2006b. Organic carbon fluxes within and streamwater exports from forested headwater catchments in the southern Amazon. Hydrological Processes 20: 2599-2614. doi: 10.1002/hyp.6218.

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