Phosphorus Flux from Onsite Waste Disposal Systems

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Abstract/Contents

Abstract: This raster data layer represents the phosphorus flux coming from onsite waste disposal systems (OSDS) (e.g. cesspools and septic tanks). OSDS point data was obtained from UH/DOH (Bob Whittier & El Kadi) that estimates phosphorus flux from each TMK parcel with OSDS. We converted the points to raster by summing nutrient flux values within 500 m x 500 m pixels. Then focal statistics was used to calculate the total flux within a 1.5 km radius of each oceanic cell. Units are in grams/day per km2.
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 project (http://oceantippingpoints.org/). Ocean tipping points occur when incremental changes 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. The goal of the Hawaii case study of the Ocean Tipping Points project was to gather, process and map spatial data on environmental and anthropogenic drivers of coral reef ecosystem states. Understanding direct anthropogenic drivers is critical for coral reef management and implementing policies to protect ecosystem services generated by coral reefs.

Type of resource	cartographic, software, multimedia
Form	Raster Dataset
Publisher	Ocean Tipping Points Project
Publication date	2016
Language	English
Digital origin	born digital
Map data	Scale not given. ; Custom projection W 160°17ʹ58ʺ--W 154°41ʹ2ʺ/N 22°16ʹ45ʺ--N 18°50ʹ50ʺW 160°17ʹ58ʺ--W 154°40ʹ57ʺ/N 22°16ʹ45ʺ--N 18°50ʹ55ʺ, Scale not given ; EPSG::4326

Creator	Ocean Tipping Points Project

Subject	Phosphorus
Subject	Nutrient pollution of water
Subject	Waste disposal in the ocean
Subject	Marine ecology
Subject	Marine ecosystem management
Subject	Marine ecosystem health
Subject	Environmental impact analysis
Subject	Coastal ecosystem health
Subject	Hawaii
Subject	Pacific Ocean
Subject	2016
Subject	Oceans
Subject	Environment
Genre	Geospatial data
Genre	Cartographic dataset

WGS84 Cartographics	This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
Location	https://purl.stanford.edu/kw453qp4147

Use and reproduction: Please contact the Ocean Tipping Points project in advance of applying these data sets to project work so the PI can track and communicate data uses and ensure no duplicate efforts are underway. When applying these data for publication, please reference and cite the complete journal article, Wedding et al. 2017, http://oceantippingpoints.org/our-work/publications.
Copyright: Copyright ownership resides with the originator.

Preferred citation: Ocean Tipping Points Project. (2016). Phosphorus Flux from Onsite Waste Disposal Systems. Ocean Tipping Points Project. Available at: http://purl.stanford.edu/kw453qp4147.

Ocean Tipping Points

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