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Updated: Jun 2, 2026

Design and Construction of an Urban Runoff Research Facility
13:48

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Published on: August 8, 2014

Can urban P conservation help to prevent the brown devolution?

Lawrence A Baker1

  • 1Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Avenue, St. Paul, MN 55108, United States. baker127@umn.edu

Chemosphere
|April 13, 2011
PubMed
Summary
This summary is machine-generated.

Understanding phosphorus (P) flows in urban areas is crucial for conservation. A study in the Twin Cities Watershed (TCW) found P conservation efforts could significantly increase P export for fertilizer, supporting local food production.

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Published on: May 15, 2017

Area of Science:

  • Urban Ecology
  • Environmental Science
  • Resource Management

Background:

  • Non-renewable phosphate rock is depleting.
  • Growing global population increases demand for phosphorus (P).
  • Understanding urban P flows is vital for conservation.

Purpose of the Study:

  • To analyze phosphorus mass flow in the Twin Cities Watershed (TCW).
  • To evaluate a conservation scenario for P management.
  • To assess the potential of recovered P as agricultural fertilizer.

Main Methods:

  • Mass flow analysis (MFA) was used to quantify P inputs, storage, leakage, and exports.
  • A comprehensive conservation scenario was modeled.
  • P recovery potential was assessed for agricultural use.

Main Results:

  • Baseline P analysis showed 65% storage and 31% leakage in the TCW.
  • The conservation scenario reduced P input by 15%.
  • Deliberate P export increased to 68% of input, with reduced storage (23%) and leakage (9%).

Conclusions:

  • Urban P conservation can significantly increase P recovery.
  • Recovered P could support approximately 50% of the TCW's food production needs if used as fertilizer.
  • Effective P management is key to resource conservation and sustainable urban systems.