Non-perennial stream networks as directed acyclic graphs: The R-package streamDAG

Authors

• Ken Aho, Idaho State UniversityFollow
• Cathy Kriloff, Idaho State University
• Sarah E. Godsey, Idaho State University
• Rob Ramos, University of Kansas
• Chris Wheeler, Kansas Geological Survey
• Yaqi You, Department of Environmental Resources Engineering
• Sara Warix, Idaho State University
• De Wayne Derryberry, Idaho State University
• Sam Zipper, Kansas Geological Survey
• Rebecca L. Hale, Smithsonian Environmental Research Center
• Charles T. Bond, University of Southern MississippiFollow
• Kevin A. Kuehn, University of Southern MississippiFollow

Document Type

Article

Publication Date

9-1-2023

School

Biological, Environmental, and Earth Sciences

Abstract

Many conventional stream network metrics are poorly suited to non-perennial streams, which can vary substantially in space and time. To address this issue, we considered non-perennial stream networks as directed acyclic graphs (DAGs). DAG metrics allow: 1) summarization of important non-perennial stream characteristics (e.g., complexity, connectedness, and nestedness) from both local (individual segment) and global stream network perspectives, and 2) tracking of these features as networks expand and contract. We review a large number of graph theoretic metrics, and introduce a new R package, streamDAG that codifies approaches we feel are most useful. The streamDAG package contains procedures for handling water presence data, and functions for both local and global analyses of both unweighted and weighted stream DAGs. We demonstrate streamDAG using two North American non-perennial streams: Murphy Creek, a simple drainage system in the Owyhee Mountains of southwestern Idaho, and Konza Prairie, a relatively complex network in central Kansas.

Publication Title

Environmental Modelling and Software

Volume

167

Recommended Citation

Aho, K., Kriloff, C., Godsey, S., Ramos, R., Wheeler, C., You, Y., Warix, S., Derryberry, D., Zipper, S., Hale, R., Bond, C., Kuehn, K. (2023). Non-perennial stream networks as directed acyclic graphs: The R-package streamDAG. Environmental Modelling and Software, 167.
Available at: https://aquila.usm.edu/fac_pubs/22195