As part of the Coral Reef Project, the USGS is working closely with other local groups to investigate poor water quality issues in Maunalua Bay on the southeast coast of Oʻahu.
Overview
Oʻahu encompasses 1,546 sq km (597 sq mi) and is the third largest in the Hawaiian Islands chain. Also known as The Gathering Place, Oʻahu draws more visitors than any of the other Hawaiian Islands. The island was formed from joining of the Waiʻanae and Koʻolau volcanoes. Coral reefs surround the island, although active live coral growth is limited to the leeward sides of the island or in sheltered areas on the windward coasts. Reef structures on the north shore help form the waves that draw surfers worldwide.
Motivation
The USGS is working closely with Mālama Maunalua and the Kewalo Marine Laboratory, as part of the Hawaiʻi Local Action Strategy Plan, to investigate poor water quality issues in Maunalua Bay on the southeast coast of Oʻahu. This coral-lined embayment has seen a dramatic decline in ecosystem health, including sedimentation, invasive algae species, and a reduction in reef fish. A major factor in the decline of ecosystem health is human-induced changes on land, mainly from engineering of natural drainage gulches that have become concrete-lined channels. These channels speed up the flow of storm runoff from the uplands, increasing the discharge of freshwater, sediment and other land-based pollutants to the bay. The USGS has been instrumental in measuring water-column properties in Maunalua Bay, including waves, currents, water levels, temperature, salinity, and turbidity, to provide insight into the transport and fate of these contaminants.
We have also assisted the National Park Service (NPS) with documentation of underwater conditions around the USS Arizona Memorial (see World War II Valor in the Pacific National Monument) in Pearl Harbor. Of special concern is the fact that the hull of the USS Arizona is deteriorating and has the potential of releasing more than half a million gallons of fuel oil into the environment. By using the same instrumentation packages that we use to monitor oceanographic conditions on coral reefs, such as currents, waves, temperature and salinity, we can help the NPS get a handle on the physical dynamics surrounding the submerged hull.
Other partners working with the USGS on Oʻahu include the National Oceanic and Atmospheric Administration (NOAA), University of Hawaiʻi, James Cook University, University of California, Santa Cruz, and The Nature Conservancy.
The Hawaiian island of Oʻahu is just one of the USGS Coral Reef Project’s study locations.
O‘ahu data sets produced by the Coral Reef Project
Below are publications associated with this project.
Coastal circulation and sediment dynamics in Maunalua Bay, Oahu, Hawaii: Measurements of waves, currents, temperature, salinity, and turbidity: November 2008-February 2009
Science-Based Strategies for Sustaining Coral Ecosystems
Shelf stratigraphy and the influence of antecedent substrate on Holocene reef development, south Oahu, Hawaii
Summary and preliminary interpretations of USGS cruise A-2-02-HW: Underwater video surveys collected off of Oahu, Molokai, and Maui, Hawaii, June-July 2002
Dynamics of the physical environment at the USS Arizona memorial: 2002-2004
Holocene reef development where wave energy reduces accommodation
El Nino influence on Holocene reef accretion in Hawai'i
New mapping techniques help assess the health of Hawaii's coral reefs
As part of the Coral Reef Project, the USGS is working closely with other local groups to investigate poor water quality issues in Maunalua Bay on the southeast coast of Oʻahu.
Overview
Oʻahu encompasses 1,546 sq km (597 sq mi) and is the third largest in the Hawaiian Islands chain. Also known as The Gathering Place, Oʻahu draws more visitors than any of the other Hawaiian Islands. The island was formed from joining of the Waiʻanae and Koʻolau volcanoes. Coral reefs surround the island, although active live coral growth is limited to the leeward sides of the island or in sheltered areas on the windward coasts. Reef structures on the north shore help form the waves that draw surfers worldwide.
Motivation
The USGS is working closely with Mālama Maunalua and the Kewalo Marine Laboratory, as part of the Hawaiʻi Local Action Strategy Plan, to investigate poor water quality issues in Maunalua Bay on the southeast coast of Oʻahu. This coral-lined embayment has seen a dramatic decline in ecosystem health, including sedimentation, invasive algae species, and a reduction in reef fish. A major factor in the decline of ecosystem health is human-induced changes on land, mainly from engineering of natural drainage gulches that have become concrete-lined channels. These channels speed up the flow of storm runoff from the uplands, increasing the discharge of freshwater, sediment and other land-based pollutants to the bay. The USGS has been instrumental in measuring water-column properties in Maunalua Bay, including waves, currents, water levels, temperature, salinity, and turbidity, to provide insight into the transport and fate of these contaminants.
We have also assisted the National Park Service (NPS) with documentation of underwater conditions around the USS Arizona Memorial (see World War II Valor in the Pacific National Monument) in Pearl Harbor. Of special concern is the fact that the hull of the USS Arizona is deteriorating and has the potential of releasing more than half a million gallons of fuel oil into the environment. By using the same instrumentation packages that we use to monitor oceanographic conditions on coral reefs, such as currents, waves, temperature and salinity, we can help the NPS get a handle on the physical dynamics surrounding the submerged hull.
Other partners working with the USGS on Oʻahu include the National Oceanic and Atmospheric Administration (NOAA), University of Hawaiʻi, James Cook University, University of California, Santa Cruz, and The Nature Conservancy.
The Hawaiian island of Oʻahu is just one of the USGS Coral Reef Project’s study locations.
O‘ahu data sets produced by the Coral Reef Project
Below are publications associated with this project.