A stochastic model of streamflow for urbanized basins

Alfonso Mejía, Edoardo Daly, Florian Rossel, Tijana Jovanovic, Jorge Gironás

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Given the critical role of the streamflow regime for instream, riparian, and floodplain ecosystem sustainability, modeling the long-term effect of urbanization on streamflow is important to predict possible changes in stream ecosystems. Since flow duration curves are largely used to characterize the streamflow regime and define indices for stream ecosystem health, we present two stochastic models, with different levels of complexity, that link the key physical features of urbanized basins with rainfall variability to determine the resulting flow duration curves. The two models are tested against 11 basins with various degrees of urban development, characterized by the percentage of impervious areas in the basin. Results show that the more complex model needs to be used to reproduce accurately the entire flow duration curve. The analysis performed suggests that the transformation of green (i.e., water used in evapotranspiration) to blue (i.e., streamflow) water in urbanized basins is an important long-term source of ecohydrological alteration. The modeling scheme also provides useful links between rainfall variability, urbanization levels, and some streamflow indices of high and low flows. Key Points Stochastic model of streamflow in urban basins reproduces flow duration curves Link between rainfall and urbanization used to obtain ecohydrological indices Long-term transformation of green to blue water important in urban basins

Original languageEnglish (US)
Pages (from-to)1984-2001
Number of pages18
JournalWater Resources Research
Volume50
Issue number3
DOIs
StatePublished - Mar 2014

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streamflow
basin
urbanization
rainfall
ecosystem
ecosystem health
low flow
urban development
modeling
evapotranspiration
floodplain
sustainability
water
index

All Science Journal Classification (ASJC) codes

  • Water Science and Technology

Cite this

Mejía, A., Daly, E., Rossel, F., Jovanovic, T., & Gironás, J. (2014). A stochastic model of streamflow for urbanized basins. Water Resources Research, 50(3), 1984-2001. https://doi.org/10.1002/2013WR014834
Mejía, Alfonso ; Daly, Edoardo ; Rossel, Florian ; Jovanovic, Tijana ; Gironás, Jorge. / A stochastic model of streamflow for urbanized basins. In: Water Resources Research. 2014 ; Vol. 50, No. 3. pp. 1984-2001.
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Mejía, A, Daly, E, Rossel, F, Jovanovic, T & Gironás, J 2014, 'A stochastic model of streamflow for urbanized basins', Water Resources Research, vol. 50, no. 3, pp. 1984-2001. https://doi.org/10.1002/2013WR014834

A stochastic model of streamflow for urbanized basins. / Mejía, Alfonso; Daly, Edoardo; Rossel, Florian; Jovanovic, Tijana; Gironás, Jorge.

In: Water Resources Research, Vol. 50, No. 3, 03.2014, p. 1984-2001.

Research output: Contribution to journalArticle

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