Nitrogen Flux from Onsite Sewage Disposal Systems (OSDS) - Hawaii


This layer represents the nitrogen flux coming from onsite sewage disposal systems (OSDS) (e.g., cesspools and septic tanks). OSDS point data were obtained from the University of Hawaii at Manoa (UH) (Aly El-Kadi) and the State of Hawaii Department of Health (DOH) (Bob Whittier) that estimates nitrogen flux from each property, or Tax Map Key (TMK) parcel, with OSDS. The Ocean Tipping Points (OTP) project converted the points to raster by summing nutrient flux values within 500-m pixels. A Focal Statistics tool was then used to calculate the total flux within a 1.5-km radius of each offshore pixel. Units are in grams per day per km squared. The area of interest is from the shoreline of the Main Hawaiian Islands extending 5 km offshore and 1 km inshore.

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Distributor National Center for Ecological Analysis and Synthesis (NCEAS)
Point of Contact Carrie V. Kappel
National Center for Ecological Analysis and Synthesis (NCEAS)
kappel@nceas.ucsb.edu
Online Resource
Principal Investigator Carrie V. Kappel
National Center for Ecological Analysis and Synthesis (NCEAS)
kappel@nceas.ucsb.edu
Online Resource
Originator Lisa M. Wedding
University of Oxford
lisa.wedding@ouce.ox.ac.uk
Online Resource
Originator Joey Lecky
NOAA Pacific Islands Fisheries Science Center (PIFSC)
joey.lecky@noaa.gov
Resource Provider Ocean Tipping Points (OTP)
info@oceantippingpoints.org
Online Resource
Publisher Pacific Islands Ocean Observing System (PacIOOS)
info@pacioos.org
Online Resource
Dataset Point of Contact Pacific Islands Ocean Observing System (PacIOOS)
info@pacioos.org
General Documentation
Associated Documentation Pacific Islands Ocean Observing System (PacIOOS)
Resource Provider Ocean Tipping Points (OTP)
Date(s) creation: 2017-03-14
issued: 2017-03-14
revision: 2017-03-14
creation: 2017-03-14
issued: 2017-03-14
revision: 2017-03-14
creation: 2017-03-14
issued: 2017-03-14
revision: 2017-03-14
creation: 2017-03-14
issued: 2017-03-14
revision: 2017-03-14
Purpose This layer was developed as part of a geospatial database of key anthropogenic pressures to coastal waters of the Main Hawaiian Islands for the Ocean Tipping Points (OTP) project (http://oceantippingpoints.org). Ocean tipping points occur when shifts in human use or environmental conditions result in large, and sometimes abrupt, impacts to marine ecosystems. The ability to predict and understand ocean tipping points can enhance ecosystem management, including critical coral reef management and policies to protect ecosystem services produced by coral reefs. The goal of the Ocean Tipping Points Hawaii case study was to gather, process, and map spatial information on environmental and human-based drivers of coral reef ecosystem conditions.
Use Limitations Please contact the Ocean Tipping Points (OTP) project in advance of applying these data to project work so that the principal investigator, Carrie Kappel (kappel@nceas.ucsb.edu), can track and communicate data uses and ensure no duplicate efforts are underway. The data may be used and redistributed for free but is not intended for legal use, since it may contain inaccuracies. Neither the data Contributor, University of Hawaii, PacIOOS, NOAA, State of Hawaii nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information.
Spatial Bounding Box Coordinates N: 22.279162574823264° S: 18.848703274150445° E: -154.68250665384699° W: -160.29941254176182°
Theme keywords GCMD Science Keywords
  • Earth Science > Biosphere > Aquatic Ecosystems > Reef Habitat
  • Earth Science > Biosphere > Ecosystems > Marine Ecosystems > Reef > Coral Reef
  • Earth Science > Human Dimensions > Environmental Impacts
  • Earth Science > Human Dimensions > Environmental Impacts > Contaminant Levels/Spills
  • Earth Science > Human Dimensions > Environmental Impacts > Sewage Disposal
  • Earth Science > Human Dimensions > Human Settlements > Coastal Areas
  • Earth Science > Human Dimensions > Sustainability > Environmental Sustainability
  • Earth Science > Oceans > Coastal Processes > Coral Reefs
  • Earth Science > Oceans > Ocean Chemistry > Nitrogen
  • Earth Science > Oceans > Water Quality > Ocean Contaminants

Data Center keywords GCMD Data Center Keywords
  • PacIOOS > Pacific Islands Ocean Observing System

Place keywords GCMD Location Keywords
  • Continent > North America > United States Of America > Hawaii
  • Ocean > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands

Project keywords GCMD Project Keywords
  • PacIOOS > Pacific Islands Ocean Observing System

Use Constraints Please contact the Ocean Tipping Points (OTP) project in advance of applying these data to project work so that the principal investigator, Carrie Kappel (kappel@nceas.ucsb.edu), can track and communicate data uses and ensure no duplicate efforts are underway. The data may be used and redistributed for free but is not intended for legal use, since it may contain inaccuracies. Neither the data Contributor, University of Hawaii, PacIOOS, NOAA, State of Hawaii nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information.
Lineage Statement 2017-03-14T00:00:00Z OGC web services (WMS and WFS) enabled by PacIOOS via GeoServer. Original data from source provider may have been reformatted, reprojected, or adjusted in other ways to optimize these capabilities.
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