Windward Community College Heeia Stream and Kaneohe Bay Water Quality Assessment Project 2002-2003 (NODC Accession 00014899)

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Frequently anticipated questions:

What does this data set describe?

Windward Community College Heeia Stream and Kaneohe Bay Water Quality Assessment Project 2002-2003 (NODC Accession 00014899)
Measurements of water quality parameters were taken by Windward Community College faculty and students at eight sites in the Heeia Stream and adjacent bay waters from December 2002 through November 2003. Parameters include Combined Nitrogen, Total Lead, Total Nitrogen, and Total Phosphorous. Data provided as MS Excel spreadsheets and GIF plots.
Entry_ID Unknown Sensor_Name sample bottles, ion chromatograph system Source_Name manual Project_Campaign: NOAA Originating_Center Windward Community College Storage_Medium MS Excel Online_size: 941 kbytes
  1. How should this data set be cited?

    Leticia Colmenares, Windward Community College, Unknown, Windward Community College Heeia Stream and Kaneohe Bay Water Quality Assessment Project 2002-2003 (NODC Accession 00014899): Unpublished Material, Unpublished Material.

    Online Links:


  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -157.8164
    East_Bounding_Coordinate: -157.8078
    North_Bounding_Coordinate: 21.4483
    South_Bounding_Coordinate: 21.4175

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Beginning_Date: 06-Dec-2002
    Ending_Date: 15-Nov-2003
    Currentness_Reference: ground condition

  5. What is the general form of this data set?

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

    2. What coordinate system is used to represent geographic features?

  7. How does the data set describe geographic features?

    Original data files given as MS Excel files in directory ../../data/excel/:

    File comment HeeiaCN1202-0403.xls Combined Nitrogen HeeiaLead0303-1103.xls Total Lead HeeiaTN1202-0403.xls Total Nitrogen HeeiaTP1202-0403.xls Total Phosphorous

    Sample dates, locations, and units are defined in each file Redundant ASCII copies were made of each with same file name except for a CSV (Comma Separated Version) extention.

    The following were downloaded off the internet, <>

    Directory ../../data/figs_text The following files contain plots and a table of the data found in the Excel files described above:

    combined_nitrogen_plot_table.gif total_phosphorous_plot_table.gif lead_plot_table.gif totalnitrogen_plot_table.gif

    These files have descriptions and comments regarding each parameter:

    combined_nitrogen_discussion.txt total_phosphorous_discussion.txt lead_discussion.txt totalnitrogen_discussion.txt

    More information regarding the data collection locations can be found in directory ../../data/sites:

    Figures depicting location: HeeiaSiteMap.jpg HeeiaSite01.jpg HeeiaSite02.jpg HeeiaSite03.jpg HeeiaSite04.jpg HeeiaSite05.jpg HeeiaSite06.jpg HeeiaSite07.jpg HeeiaSite08.jpg

    Descriptive text and discussion: HeeiaSite01.txt HeeiaSite02.txt HeeiaSite03.txt HeeiaSite04.txt HeeiaSite05.txt HeeiaSite06.txt HeeiaSite07.txt HeeiaSite08.txt

    Entity_and_Attribute_Detail_Citation: none

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

    National Oceanic and Atmospheric Administration, Windward Community College

  3. To whom should users address questions about the data?

    Leticia Colmenares
    Windward Community College
    Marine Biologist
    45-720 Kea'ahala Road
    Kaneohe, Hawaii 96744

    (808) 236-9120 (voice)

Why was the data set created?

Assess the water quality of Heeia Stream and adjacent bay waters.

How was the data set created?

  1. From what previous works were the data drawn?

  2. How were the data generated, processed, and modified?

    Date: Unknown (process 1 of 1)
    Determination of Nitrite, Nitrate and Phosphate

    Summary of Method. Water samples are filtered and analyzed by ion chromatography (IC). Each analytical batch consists of a blank, 5 external calibration standards and a calibration check for every 8 samples. The method detection limits (MDL) are as follows: 0.1 mg/L for phosphate, and 0.05 mg/L for nitrite and nitrate.

    Preparation of IC samples. Water samples are pre-filtered before analysis in the Dionex ICS-90 ion chromatography system. Fresh water samples (5 mL) are filtered through 0.20 mm IC Millex syringe filters (for freshwater samples) while saltwater samples are filtered through the Dionex Ag/H cartridges and diluted 50:50 using deionized distilled water.

    Preparation of IC calibration standards. The following calibration standards are prepared. (1) 0.1 mg/L of phosphate, 0.05 mg/L of nitrite and 0.05 mg/L nitrate (2) 0.2 mg/L phosphate and 0.1 mg/L nitrite and 0.1 mg/L nitrate (3) 1.0 mg/L phosphate and 0.5 mg/L nitrite and 0.5 mg/L nitrate (4) 2.0 mg/L phosphate and 1.0 mg/L nitrite and 1.0 mg/L nitrate (5) 10.0 mg/L phosphate and 5.0 mg/L nitrite and 5.0 mg/L nitrate

    Calibration. The calibration curve must consist of at least three data points. The response of each calibrator must be within 10%, otherwise, it does not meet method criteria and must be removed from the working calibration curve.

    Final data are summarized in Excel worksheets. The nitrite as N (mg/L) is calculated by multiplying the nitrite (mg/L) with 0.304 (factor). Likewise, the nitrate as N (mg/L) content is calculated by multiplying the nitrate (mg/L) content with 0.226 (factor). The phosphate (mg/L) content is converted to phosphorus (mg/L) by using the factor of 0.326.

    Determination of Total Nitrogen and Total Phosphorus

    Summary of Method. To analyze the total N and total P content, all phosphorus-and nitrogen-containing substances in the water sample are first converted to inorganic nitrates and phosphates by photo-oxidation. After photo-oxidation, the samples are analyzed as described above.

    Photo-oxidation. Water samples (100 mL) added with 2 drops of 30% H2O2, are photo-oxidized using Ace-Hanovia photooxidation apparatus (Department of Health State Laboratory) for four (4) hours to hydrolyze all phosphorus-containing substances into phosphates, and all nitrogen-containing substances into nitrates.

    Person who carried out this activity:

    Leticia Colmenares
    Windward Community College
    Marine Biologist
    45-720 Kea'ahala Road
    Kaneohe, Hawaii 96744

    (808) 236-9120 (voice)

  3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

  2. How accurate are the geographic locations?

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?


  5. How consistent are the relationships among the observations, including topology?

    see lineage, process step

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: None
Use_Constraints: Dataset credit required

  1. Who distributes the data set? (Distributor 1 of 1)

    NOAA/NESDIS/NODC/NCDDC (National Coastal Data Development Center)
    National Coastal Data Development Center, Building 1100
    Stennis Space Center, MS 39529

    866-732-2382 (voice)
    228-688-2968 (FAX)

    Hours_of_Service: 8am-5pm, Monday through Friday
  2. What's the catalog number I need to order this data set?

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    NOAA makes no warranty regarding these data,expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA, NESDIS, NODC and NCDDC cannot assume liability for any damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system.

  4. How can I download or order the data?

Who wrote the metadata?

Last modified: 24-Jan-2017
Last Reviewed: 13-Jan-2010
Metadata author:
Mr. Patrick C. Caldwell
Hawaii/US Pacific Liaison
1000 Pope Road, MSB 316
Honolulu, Hawaii 96822

(808)-956-4105 (voice)
(808) 956-2352 (FAX)

Hours_of_Service: 8 AM to 5 PM weekdays
Contact_Instructions: check if not available
Metadata standard:

Generated by mp version 2.9.13 on Sun Oct 22 09:42:09 2017