NYU Spatial Data Repository

Nitrogen Flux from Onsite Waste Disposal Systems

Author(s):
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.
Publisher:
Ocean Tipping Points Project
Place(s):
Hawaii and Pacific Ocean
Subject(s):
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
Format(s):
GeoTIFF
Year(s):
2016
Held by:
Stanford
Preservation record:
Variable Value
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