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http://dx.doi.org/10.3741/JKWRA.2019.52.8.515

A tool development for forced striation and delineation of river network from digital elevation model based on ModelBuilder  

Choi, Seungsoo (Department of Water and Sewage, Dongmyung Engineering)
Kim, Dongsu (Department of Civil & Environmental Engineering, Dankook University)
You, Hojun (Department of Civil & Environmental Engineering, Dankook University)
Publication Information
Journal of Korea Water Resources Association / v.52, no.8, 2019 , pp. 515-529 More about this Journal
Abstract
Geospatial information for river network and watershed boundary have played a fundamental roles in terms of river management, planning and design, hydrological and hydraulic analysis. Irrespective of their importance, the lack of punctual update and improper maintenance in currently available river-related geospatial information systems has revealed inconsistency issues between individual systems and spatial inaccuracy with regard to reflecting dynamically transferring riverine geography. Given that digital elevation models (DEMs) of high spatial resolution enabling to reproduce precise river network are only available adjacent to national rivers, DEMs with poor spatial resolution lead to generate unreliable river network information and thereby reduce their extensible applicabilities. This study first of all evaluated published spatial information available in Korea with respect to their spatial accuracy and consistency, and also provides a methodology and tool to modify existing low resolution of DEMs by means of striation of conventional or digitized river network to replicate input river network in various degree of further delineation. The tool named FSND was designed to be operated in ArcGIS ModelBuilder which ensures to automatically simulate river network striation to DEMs and delineation with different flow accumulation threshold. The FNSD was successfully validated in Seom River basin to identify its replication of given river network manually digitized based on recent aerial photograph in conjunction with a DEM with 30 meter spatial resolution. With the derived accuracy of reproducibility, substantiation of a various order of river network and watershed boundary from the striated DEM posed tangible possibility for highly extending DEMs with low resolution to be capable of producing reliable riverine spatial information subsequently.
Keywords
River network; DEM; Striation; Delineation; ModelBuilder;
Citations & Related Records
Times Cited By KSCI : 9  (Citation Analysis)
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