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Stochastic reliability-based risk evaluation and mapping for watershed systems and sustainability (STREAMS).

Allen Teklitz1, Christopher Nietch2, Timothy Whiteaker3

  • 1Department of Chemical and Environmental Engineering, University of Cincinnati, OH, USA.

Journal of Hydrology
|January 10, 2022
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Summary

This study introduces the STREAMS tool, a novel system for mapping water contamination risk. It helps improve water security and sustainability through better environmental awareness and decision-making.

Keywords:
GISProbabilistic modellingRisk assessmentWatershed managementWatershed modeling

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Area of Science:

  • Environmental Science
  • Hydrology
  • Geospatial Analysis

Background:

  • Water contamination poses risks to security and sustainability.
  • Effective decision-making requires understanding probabilistic and spatial contamination data.
  • Geospatial tools are needed to visualize and communicate water contamination risks.

Purpose of the Study:

  • To present a novel tool, STochastic Reliability-based Risk Evaluation And Mapping for watershed Systems and Sustainability (STREAMS), for assessing water contamination risk.
  • To develop a visually compelling geospatial decision-making tool inspired by weather maps.
  • To enable quantitative analysis of mitigation strategies for watershed sustainability.

Main Methods:

  • Developed the STREAMS tool integrated with ArcGIS geoprocessing.
  • Applied physics-based reliability theory to compute spatial risk distribution.
  • Defined risk as the probability of exceeding a water contamination safety threshold.

Main Results:

  • STREAMS produces risk maps communicating water contamination probability.
  • The tool quantifies risk reduction from best management practices.
  • Case studies demonstrate STREAMS' applicability across different watershed scales and properties.

Conclusions:

  • STREAMS effectively communicates water contamination risk using geospatial maps.
  • The tool supports informed decision-making for improved water security and sustainability.
  • STREAMS facilitates the evaluation of mitigation strategies in watershed management.