A glacier runoff extension to the Precipitation Runoff Modeling System

Journal of Geophysical Research F: Earth Surface
By:  and 

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Abstract

A module to simulate glacier runoff, PRMSglacier, was added to PRMS (Precipitation Runoff Modeling System), a distributed-parameter, physical-process hydrological simulation code. The extension does not require extensive on-glacier measurements or computational expense but still relies on physical principles over empirical relations as much as is feasible while maintaining model usability. PRMSglacier is validated on two basins in Alaska, Wolverine, and Gulkana Glacier basin, which have been studied since 1966 and have a substantial amount of data with which to test model performance over a long period of time covering a wide range of climatic and hydrologic conditions. When error in field measurements is considered, the Nash-Sutcliffe efficiencies of streamflow are 0.87 and 0.86, the absolute bias fractions of the winter mass balance simulations are 0.10 and 0.08, and the absolute bias fractions of the summer mass balances are 0.01 and 0.03, all computed over 42 years for the Wolverine and Gulkana Glacier basins, respectively. Without taking into account measurement error, the values are still within the range achieved by the more computationally expensive codes tested over shorter time periods.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title A glacier runoff extension to the Precipitation Runoff Modeling System
Series title Journal of Geophysical Research F: Earth Surface
DOI 10.1002/2015JF003789
Volume 121
Issue 11
Year Published 2016
Language English
Publisher AGU Publications
Contributing office(s) National Research Program - Central Branch
Description 21 p.
First page 2001
Last page 2021