Geomorphic and biophysical factors affecting water tracks in northern Alaska. Issue 3 (10th March 2016)

• Record Type: Journal Article
• Authors: Trochim, E. D.; Jorgenson, M. T.; Prakash, A.; Kane, D. L.
• Is Part Of: Earth and space science. Volume 3:Issue 3(2016:Mar.)
• Page Start: 123
• Page End: 141
• Publication Date: 2016-03-10
• Subjects: hydrology -- Arctic -- water drainage -- biophysical factors -- permafrost -- geomorphology; Space sciences -- Periodicals; Geophysics -- Periodicals; 500.5
• DOI: 10.1002/2015EA000111
• Languages: English
• ISSNs: 2333-5084

Abstract

Abstract: A better understanding of water movement on hillslopes in Arctic environments is necessary for evaluating the effects of climate variability. Drainage networks include a range of features that vary in transport capacity from rills to water tracks to rivers. This research focuses on describing and classifying water tracks, which are saturated linear‐curvilinear stripes that act as first‐order pathways for transporting water off of hillslopes into valley bottoms and streams. Multiple factor analysis was used to develop five water tracks classes based on their geomorphic, soil, and vegetation characteristics. The water track classes were then validated using conditional inference trees, to verify that the classes were repeatable. Analysis of the classes and their characteristics indicate that water tracks cover a broad spectrum of patterns and processes primarily driven by surficial geology. This research demonstrates an improved approach to quantifying water track characteristics for specific areas, which is a major step toward understanding hydrological processes and feedbacks within a region. Key Points: Five water track classes were developed using robust statistical methods Water tracks represent a range of preferential flow paths in Arctic landscapes Differences between water tracks are important for future study designs