Abstract
Integrated modeling of coupled surface-subsurface flow and ensuing role
in diverse Earth system processes is of current research interest to
characterize nonlinear rainfall-runoff response and also to understand
land surface energy balances, biogeochemical processes, geomorphological
dynamics, etc. A growing number of complex models have been developed
for water-related research, and many of these are made available to the
Earth science community. However, relatively few resources have been
made accessible to the potentially large group of Earth science and
engineering users. New users have to invest an extraordinary effort to
study the models. To provide a stimulating experience focusing on the
learning curve of integrated modeling of coupled surface-subsurface
flow, we describe use cases of an open source model, the Penn State
Integrated Hydrologic Model, PIHM. New users were guided through data
processing and model application by reproducing a numerical benchmark
problem and a real-world watershed simulation. Specifically, we document
the PIHM application and its computational workflow to enable intuitive
understanding of coupled surface-subsurface flow processes. In addition,
we describe the user experience as important evidence of the
significance of reusability. The interaction shows that documentation of
data, software, and computational workflow in research papers is a
promising method to foster open scientific collaboration and reuse. This
study demonstrates how open science practice in research papers would
promote the utility of open source software. Addressing such open
science practice in publications would promote the utility of journal
papers. Further, popularization of such practice will require
coordination among research communities, funding agencies, and journals.
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