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Title: Calculating terrain indices along streams: A new method for separating stream sides

Author: Grabs, T. J.; Jencso, K. G.; McGlynn, B. L.; Seibert, J.;

Date: 2010

Source: Water Resources Research. 46: W12536.

Publication Series: Scientific Journal (JRNL)

Description: There is increasing interest in assessing riparian zones and their hydrological and biogeochemical buffering capacity with indices derived from hydrologic landscape analysis of digital elevation data. Upslope contributing area is a common surrogate for lateral water flows and can be used to assess the variability of local water inflows to riparian zones and streams. However, current geographic information system algorithms do not provide a method for easily separating riparian zone and adjacent upland lateral contributions on each side of the stream. Here we propose a new algorithm to compute side�]separated contributions along stream networks. We describe the new algorithm and illustrate the importance of distinguishing between lateral inflows on each side of streams with hillslope-riparian zone-stream hydrologic connectivity results from high�]frequency water table data collected in the 22 km2 Tenderfoot Creek catchment, Montana.

Keywords: streams, riparian zones

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Grabs, T. J.; Jencso, K. G.; McGlynn, B. L.; Seibert, J. 2010. Calculating terrain indices along streams: A new method for separating stream sides. Water Resources Research. 46: W12536.

 


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