Project B2-2a: Flood Hydrology and Rainfall Frequency

 

James A. Smith, PhD

Princeton University
Civil & Environmental Engineering

Objective: The objective of this study is to develop a predictive understanding of urban flood hydrology that can be used to assess the effectiveness of “urban water solutions”, especially Green Infrastructure technologies, in reducing flood hazards.

Research Question: How does urban infrastructure alter flood hazards and how can flood hazards be reduced through novel urban water solutions.

Regional climate model simulation of rainfall from the September 2013 Front Range storms.

Regional climate model simulation of rainfall from the September 2013 Front Range storms.

Overview: In this project, we will examine the hydrology, hydrometeorology and hydroclimatology of urban flooding through numerical modeling and data-driven studies that focus on urban watersheds in Baltimore, Miami, Denver, Phoenix (and the broader Sun Corridor region), Los Angeles and Portland.

We will develop long-term, high-resolution radar rainfall fields for each of the six urban regions for hydrologic modeling studies and for examining the hydroclimatology of urban flash flooding.  In previous studies, it has been shown that high-resolution radar rainfall fields provide an exceptional resource for assessing urban flooding.

The six urban study regions provide a broad range of settings for examining urban flooding, both in terms of land surface process and in terms of rainfall climatology.  We will develop and implement hydrologic models for each of the study regions.  Modeling analyses will be used to address core scientific questions and assess the effectiveness of urban water solutions in reducing flood hazards.

 

DATA

This project will produce high-resolution radar rainfall fields for the six study regions that can serve as the basis for hydrologic modeling studies and hydroclimatological studies of rainfall and flood frequency.

Mean rainfall for the 25 largest rain days over Baltimore City (2000-2010).

Mean rainfall for the 25 largest rain days over Baltimore City (2000-2010).

The experimental approach will center on:

  1. Development of high-resolution radar rainfall fields for the six urban regions
  2. Development and implementation of hydrologic models for gaged watersheds in the six urban regions
    Rainfall frequency analyses for urban watersheds in Charlotte, NC based on Stochastic Storm Transposition applied to catalog of high-resolution radar rainfall fields

    Rainfall frequency analyses for urban watersheds in Charlotte, NC based on Stochastic Storm Transposition applied to catalog of high-resolution radar rainfall fields

  3. Hydroclimatological studies of urban flooding in the six urban regions.

The Models

We will develop hydrologic models that can be used for examining the consequences of urban water solutions (especially those based on Green Infrastructure technologies) and climate change.  We will develop stochastic storm transposition models for assessing rainfall and flood frequency in urban watersheds.

Journal Articles

 

Related Materials

 

 

 

Smith_Jim_ProfileJames A. Smith, PhD – Principal Investigator

William and Edna Macaleer Professor of Engineering and Applied Science
Civil and Environmental Engineering
Princeton University
Voice: (609) 258-4615
Email: jsmith@princeton.edu

Dr. Smith’s research interests concern the hydrology, hydraulics and hydrometeorology of extreme floods. Hydrometeorological studies have centered on development of technologies for measuring rainfall from weather radar, stochastic modeling of the space-time structure of rainfall and microphysical studies of extreme rainfall from organized systems of thunderstorms. Smith’s research group has been involved in numerous hydrometeorological field campaigns, most recently in connection with the Baltimore Ecosystem Study (BES), a component of the NSF LTER program. Field studies in the BES have also examined the heterogeneity of hydrologic response in urbanizing watersheds, the stability of the channel-floodplain system in urban drainage networks and the hydraulics of extreme floods in urban rivers. In addition to field campaigns focused on intensively monitoring research watersheds, Smith and his colleagues have been extensively involved in field studies of major floods in the United States

Mary Lynn Baeck – Hydrometeorology Programmer

Civil and Environmental Engineering
Princeton University
Email: mlbaeck@princeton.edu

 

Molly M. Chaney – Graduate Student

Civil and Environmental Engineering
Princeton University
Email: mchaney@exchange.Princeton.EDU

 

 

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