Parameterization for distributed watershed modeling using national data and evolutionary algorithm

Xuan Yu, Gopal Bhatt, Christopher J. Duffy, Yuning Shi

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Distributed hydrologic models supported by national soil survey, geology, topography and vegetation data products can provide valuable information about the watershed hydrologic cycle. However numerical simulation of the multi-state, multi-process system is structurally complex and computationally intensive. This presents a major difficulty in model calibration using traditional techniques. This paper presents an efficient calibration strategy for the physics-based, fully coupled, distributed hydrologic model Penn State Integrated Hydrologic Model (PIHM) with the support of national data products. PIHM uses a semi-discrete Finite Volume Method (FVM) formulation of the system of coupled ordinary differential equations (e.g. canopy interception, transpiration, soil evaporation) and partial differential equations (e.g. groundwater-surface water, overland flow, infiltration, channel flow, etc.). The matrix of key parameters to be estimated in the optimization process was partitioned into two groups according to the sensitivity to difference in time scales. The first group of parameters generally describes hydrologic processes influenced by hydrologic events (event-scale group: EG), which are sensitive to short time runoff generation, while the second group of parameters is largely influenced by seasonal changes in energy (seasonal time scale group: SG). The Covariance Matrix Adaptation Evolution Strategy (CMA-ES) is used to optimize the EG parameters in Message Passing Interface (MPI) environment, followed by the estimation of parameters in the SG. The calibration strategy was applied at three watersheds in central PA: a small upland catchment (8.4ha), a watershed in the Appalachian Plateau (231km2) and the Valley and Ridge of central Pennsylvania (843km2). A partition calibration enabled a fast and efficient estimation of parameters.

Original languageEnglish (US)
Pages (from-to)80-90
Number of pages11
JournalComputers and Geosciences
Volume58
DOIs
StatePublished - Jul 2 2013

Fingerprint

Parameterization
Watersheds
Evolutionary algorithms
parameterization
watershed
Calibration
modeling
calibration
Soil surveys
Transpiration
timescale
Message passing
Finite volume method
Channel flow
Geology
finite volume method
Covariance matrix
matrix
Runoff
Surface waters

All Science Journal Classification (ASJC) codes

  • Information Systems
  • Computers in Earth Sciences

Cite this

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Parameterization for distributed watershed modeling using national data and evolutionary algorithm. / Yu, Xuan; Bhatt, Gopal; Duffy, Christopher J.; Shi, Yuning.

In: Computers and Geosciences, Vol. 58, 02.07.2013, p. 80-90.

Research output: Contribution to journalArticle

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