Development of a decision-making framework for BMP design to reduce loads during "Hot Moments"

Nicole Opalinski, Daniel Schultz, Heather Gall, Matthew Royer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Inequality is an emergent property of many complex systems. For a given series of stochastic events, some events generate a disproportionately large contribution to system responses compared to other events. In catchments, such responses cause streamflow and solute loads to exhibit strong temporal inequality, with the majority of loads exported during short periods of time, generally corresponding to high-flow events. These time periods are commonly referred to as "hot moments" or "hot events". Although this temporal inequality is widely recognized, there is currently no uniform metric for assessing it. We used a novel application of Lorenz Inequality, a method commonly used in economics to quantify income inequality, to analyze the transport of nutrient and sediment loads in the Chesapeake Bay Watershed. The analysis was used to identify "hot moments" and corresponding flowrates associated with large solute loads. These flow conditions can ultimately be used to design structural best management practices (BMPs) such as vegetated filter strips, riparian buffers, and constructed wetlands. Based on the results of the temporal inequality analysis, we developed a decision-making framework for 14 subwatersheds in the Chesapeake Bay Watershed. The goal of this framework is to identify the "windows of opportunity" for reducing nutrient loads and informing BMP design and implementation. This approach allows users to identify the fraction of time and corresponding flowrates during which a given percentage of load is exported, thereby enabling the development of a site-specific tool that can be used to reduce loads and achieve water quality goals.

Original languageEnglish (US)
Title of host publication2016 American Society of Agricultural and Biological Engineers Annual International Meeting, ASABE 2016
PublisherAmerican Society of Agricultural and Biological Engineers
ISBN (Electronic)9781510828759
DOIs
StatePublished - 2016
Event2016 ASABE Annual International Meeting - Orlando, United States
Duration: Jul 17 2016Jul 20 2016

Publication series

Name2016 American Society of Agricultural and Biological Engineers Annual International Meeting, ASABE 2016

Other

Other2016 ASABE Annual International Meeting
CountryUnited States
CityOrlando
Period7/17/167/20/16

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Agronomy and Crop Science

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    Opalinski, N., Schultz, D., Gall, H., & Royer, M. (2016). Development of a decision-making framework for BMP design to reduce loads during "Hot Moments". In 2016 American Society of Agricultural and Biological Engineers Annual International Meeting, ASABE 2016 (2016 American Society of Agricultural and Biological Engineers Annual International Meeting, ASABE 2016). American Society of Agricultural and Biological Engineers. https://doi.org/10.13031/aim.20162456929