Title

Calibration of SWAT models using the cloud

Document Type

Article

Journal/Book Title/Conference

Environmental Modelling & Software

Volume

62

Publication Date

12-31-2014

First Page

188

Last Page

196

DOI

10.1016/j.envsoft.2014.09.002

Abstract

This paper evaluates a recently created Soil and Water Assessment Tool (SWAT) calibration tool built using the Windows Azure Cloud environment and a parallel version of the Dynamically Dimensioned Search (DDS) calibration method modified to run in Azure. The calibration tool was tested for six model scenarios constructed for three watersheds of increasing size each for a 2 year and 10 year simulation duration. Results show significant speedup in calibration time and, for up to 64 cores, minimal losses in speedup for all watershed sizes and simulation durations. An empirical relationship is presented for estimating the time needed to calibration a SWAT model using the cloud calibration tool as a function of the number of Hydrologic Response Units (HRUs), time steps, and cores used for the calibration.

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