Windward Community College Heeia Stream and Kaneohe Bay Water Quality Assessment Project 2004-2005 (NODC Accession 0002449)

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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 2004-2005 (NODC Accession 0002449)
Measurements of water quality parameters were taken by Windward Community College faculty and students at eight sites in the Heeia Stream and adjacent Kaneohe Bay waters from May 2004 through March 2005. Parameters include Combined Nitrogen, Photo Oxidized Nitrate, Photo Oxidized Nitrite, Total Nitrogen, Total Phosphate. Data provided as MS Excel spreadsheets.
Sensor_Name sample bottles, ion chromatograph system Source_Name manual Project_Campaign: MIS-NOAA, NOAA Grant NA16 RG 2069 Originating_Center Windward Community College Storage_Medium: MS Excel Online_size: 1063 kbytes

NODC Accession Number 0002449

  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 2004-2005 (NODC Accession 0002449).

    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: 22-May-2004
    Ending_Date: 19-Mar-2005
    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/: (Note month/year range, mmyy, suffixed to each root filename.)

    File comment HeeiaCN0504-1004.xls Combined Nitrogen HeeiaCN1104-0305.xls Combined Nitrogen HeeiaPONitrate0504-1004.xls Photo Oxidized Nitrate HeeiaPONitrate1104-0305.xls Photo Oxidized Nitrate HeeiaPONitrite0504-1004.xls Photo Oxidized Nitrite HeeiaPONitrite1104-0305.xls Photo Oxidized Nitrite HeeiaTN0504-1004.xls Total Nitrogen HeeiaTN1104-0305.xls Total Nitrogen HeeiaTP0504-1004.xls Total Phosphate HeeiaTP1104-0305.xls Total Phosphate

    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.

    Time series plots of parameters and comments were downloaded off the internet, <>, and placed in directory ../../data/figs_text

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

    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 Chemist
    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 ionchromatography (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, and0.05 mg/L for nitrite and nitrate. Preparation of IC samples. Water samples are pre-filtered before analysis inthe 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 datapoints. 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, arephoto-oxidized using Ace-Hanovia photooxidation apparatus (Department ofHealth 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 Chemist
    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/National Oceanographic Data Center
    Attn: Data Access Group, User Services Team
    SSMC-3 Fourth Floor
    Silver Spring, MD 20910-3282

    301-713-3277 (voice)
    301-713-3302 (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 Mon Oct 16 09:42:45 2017