Continuous water quality monitoring to determine the cause of coral reef ecosystem degradation for coastal windward Oahu streams during 2002 (NODC Accession 0001070)

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Kaneohe and Waimanalo streams on the windward side of the island of Oahu in the Hawaiian Islands have been hardened to prevent flooding. The hardening process has involved elimination of the natural riparian habitat and replacement of the natural stream channel with a concrete-lined conduit having vertical walls and a broad, flat bottom. The shallow depth of the water column and the absence of shade have resulted in temperatures that average as much as 4-5oC above ambient and rise as high as 32oC during daylight hours. Unlike most low-order streams, the hardened sections of both streams are autotrophic, as evidenced by elevated pH values and O2 concentrations as high as 150% of saturation. Several allochthonous inputs, one from a storm sewer and the other from a natural spring, introduced water with anomalously low O2 concentrations and very high nitrate concentrations. The absence of sediments in the hardened sections of the streams precludes natural sedimentary microbial processes, including denitrification. Nitrate concentrations in a section of Waimanalo Stream with a natural streambed drop dramatically from values in excess of 400 ?M to concentrations less than 10 ?M at the head of the estuary. Although some of this decline is due to dilution with seawater, the concentration of nitrate at the head of the estuary is only 10% of the value that could be explained by dilution effects. Biological processes associated with a natural streambed thus appear very important to the functionality of the streams and in particular to their ability to process allochthonous nutrient inputs in a way that minimizes impacts on the nearshore environment. Prevention of flooding can be accomplished by mechanisms that do not involve elimination of riparian buffer zones and destruction of channel habitat. To maintain water quality and stream functionality, it will be important that these alternative methods of flood control be utilized. Converting natural streams to storm sewers is an unenlightened way to address flooding problems.
  • Cite as: Laws, E. A.; University of Hawai'i at Mānoa (2010). Continuous water quality monitoring to determine the cause of coral reef ecosystem degradation for coastal windward Oahu streams during 2002 (NODC Accession 0001070). Version 1.1. National Oceanographic Data Center, NOAA. Dataset. [access date]
gov.noaa.nodc:0001070
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Distributor DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
301-713-3277
NCEI.Info@noaa.gov
Dataset Point of Contact Information Services
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
301-713-3277
NCEI.Info@noaa.gov
Time Period 2002-02-04 to 2002-11-21
Spatial Bounding Box Coordinates
N: 21.41
S: 21.36
E: -157.71
W: -157.8
Spatial Coverage Map
General Documentation
Publication Dates
  • publication: 2010-12-17
Edition 1.1
Data Presentation Form Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status Complete - production of the data has been completed
Data Update Frequency As needed
Purpose Quantify the effects of stream hardening on water quality and stream functionality and the effects on the near shore coral ecosystem.
Use Limitations
  • accessLevel: Public
  • Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
Dataset Citation
  • Cite as: Laws, E. A.; University of Hawai'i at Mānoa (2010). Continuous water quality monitoring to determine the cause of coral reef ecosystem degradation for coastal windward Oahu streams during 2002 (NODC Accession 0001070). Version 1.1. National Oceanographic Data Center, NOAA. Dataset. [access date]
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Theme keywords NODC DATA TYPES THESAURUS NODC OBSERVATION TYPES THESAURUS WMO_CategoryCode
  • oceanography
Global Change Master Directory (GCMD) Science and Services Keywords
  • EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > WATER DEPTH
  • EARTH SCIENCE > OCEANS > MARINE SEDIMENTS
  • EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY
  • EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ALKALINITY
  • EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRATE
  • EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRITE
  • EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITROGEN
  • EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > OXYGEN
  • EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PH
  • EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PHOSPHATE
  • EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > SILICATE
  • EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE
Originator Theme Keywords
  • biogeochemical data
  • coastal streams
  • water quality
Data Center keywords Global Change Master Directory (GCMD) Data Center Keywords
  • DOC/NOAA/NESDIS/NODC > National Oceanographic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
NODC COLLECTING INSTITUTION NAMES THESAURUS NODC SUBMITTING INSTITUTION NAMES THESAURUS
Instrument keywords NODC INSTRUMENT TYPES THESAURUS Global Change Master Directory (GCMD) Instrument Keywords
  • In Situ/Laboratory Instruments > Chemical Meters/Analyzers > PH METERS
  • In Situ/Laboratory Instruments > Temperature/Humidity Sensors > Thermometers > THERMOMETERS
Place keywords NODC SEA AREA NAMES THESAURUS Global Change Master Directory (GCMD) Location Keywords
  • OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN
Originator Place Keywords
  • Kailua Bay
  • Kaneohe Bay
  • Kaneohe Stream
  • Kaneohe, Oahu, Hawaii
  • Waimanalo
  • Waimanalo Stream
Project keywords NODC PROJECT NAMES THESAURUS
Keywords NCEI ACCESSION NUMBER
Use Constraints
  • Cite as: Laws, E. A.; University of Hawai'i at Mānoa (2010). Continuous water quality monitoring to determine the cause of coral reef ecosystem degradation for coastal windward Oahu streams during 2002 (NODC Accession 0001070). Version 1.1. National Oceanographic Data Center, NOAA. Dataset. [access date]
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Lineage information for: dataset
Processing Steps
  • 2010-12-17T02:40:12 - NCEI Accession 0001070 v1.1 was published.
Output Datasets
Lineage information for: repository
Processing Steps
  • 2015-04-22T00:00:00 - NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
Acquisition Information (collection)
Instrument
  • pH sensors
  • thermometer
  • YSI - handheld multi-parameter instrument
Last Modified: 2017-08-08T18:53:31
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