Nitrogen Flux from Onsite Waste Disposal Systems

Description:

This raster data layer represents the nitrogen 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 nitrogen 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. 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. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

Resource Link:

https://purl.stanford.edu/gh467sr9939

Identifier:

https://purl.stanford.edu/gh467sr9939

Language:

eng

Creator:

Ocean Tipping Points Project

Publisher:

Ocean Tipping Points Project

Provider:

Stanford

Resource Class:

Datasets

Resource Type:

Raster data

Subject:

Nitrogen, Nutrient pollution of water, Waste disposal in the ocean, Marine ecology, Marine ecosystem management, Marine ecosystem health, Environmental impact analysis, Coastal ecosystem health, Oceans, and Environment

Theme:

Oceans and Environment

Temporal Coverage:

2016

Date Issued:

2016

Spatial Coverage:

Hawaii and Pacific Ocean

Rights:

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.

Rights Holder:

Copyright ownership resides with the originator.

Access Rights:

Public

Format:

GeoTIFF

Georeferenced:

false