Practical Use of Computationally Frugal Model Analysis Methods
- U.S. Geological Survey, Boulder, CO (United States); Univ. of Kansas, Lawrence, KS (United States)
- Univ. of Adelaide, SA (Australia)
- National Center for Atmospheric Research, Boulder, CO (United States)
- Florida State Univ., Tallahassee, FL (United States)
- Colorado State Univ., Fort Collins, CO (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of Darmstadt (Germany)
- California State Univ. (CalState), Chico, CA (United States)
Computationally frugal methods of model analysis can provide substantial benefits when developing models of groundwater and other environmental systems. Model analysis includes ways to evaluate model adequacy and to perform sensitivity and uncertainty analysis. Frugal methods typically require 10s of parallelizable model runs; their convenience allows for other uses of the computational effort. We suggest that model analysis be posed as a set of questions used to organize methods that range from frugal to expensive (requiring 10,000 model runs or more). This encourages focus on method utility, even when methods have starkly different theoretical backgrounds. We note that many frugal methods are more useful when unrealistic process-model nonlinearities are reduced. Inexpensive diagnostics are identified for determining when frugal methods are advantageous. Examples from the literature are used to demonstrate local methods and the diagnostics. We suggest that the greater use of computationally frugal model analysis methods would allow questions such as those posed in this work to be addressed more routinely, allowing the environmental sciences community to obtain greater scientific insight from the many ongoing and future modeling efforts
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- ORNL LDRD Director's R&D; USDOE
- Grant/Contract Number:
- AC05-00OR22725; SC0008272
- OSTI ID:
- 1286771
- Alternate ID(s):
- OSTI ID: 1400448
- Journal Information:
- Ground Water, Journal Name: Ground Water Journal Issue: 2 Vol. 54; ISSN 0017-467X
- Publisher:
- Wiley - NGWACopyright Statement
- Country of Publication:
- United States
- Language:
- English
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