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Document: Application of hierarchy theory to cross-scale hydrologic modeling of nutrient loads (Doc-123)

123
Authors
Tran, L. T., O’Neill, R. V., Smith, E. R., Bruins, R. J. F. and Harden, C.
Year
2013
Title
Application of hierarchy theory to cross-scale hydrologic modeling of nutrient loads
Document Type
Journal Article
Journal
Water Resources Management
Volume
27
Issue
5
Pages
1601-1617
Abstract
We describe a framework called Regional Hydrologic Modeling for Environmental Evaluation (RHyME2) for hydrologic modeling across scales. Rooted from hierarchy theory, RHyME2 acknowledges the rate-based hierarchical structure of hydrological systems. Operationally, hierarchical constraints are accounted for and explicitly described in models put together into RHyME2. We illustrate RHyME2with a two-module model to quantify annual nutrient loads in stream networks and watersheds at regional and subregional levels. High values of R2 (>0.95) and the Nash–Sutcliffe model efficiency coefficient (>0.85) and a systematic connection between the two modules show that the hierarchy theory-based RHyME2 framework can be used effectively for developing and connecting hydrologic models to analyze the dynamics of hydrologic systems.
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