Comparison of methodologies for automatic generation of limits and drainage networks for hidrographic basins

Revista Brasileira de Engenharia Agrícola e Ambiental

Sannier, Christophe²  Vitorino, Antonio C. T.¹  Alcaraz, Samantha A.³  Daniel, Omar¹ 

[1] Universidade Federal da Grande Dourados, Vila Progresso;Cranfield University, Cranfield;Cranfield University, Bedfordshire MK43 0AL

关键词: watershed;    catchment;    geographic information systemsRESUMO Propôs-se;    neste trabalho comparar metodologias para geração automática de limites e de redes de drenagem superficial na bacia hidrográfica do Rio Dourados;    com baixa variação de relevo;    usando-se sistemas de informações geográficas;   

DOI  :  10.1590/S1415-43662009000400001

学科分类：农业科学（综合）

来源: Universidade Federal de Campina Grande * Centro de Ciencias e Tecnologia

【 摘 要 】

The objective of this work was to compare methodologies for the automatic generation of limits and drainage networks, using a geographical information system for basins of low relief variation, such as the Dourados catchment area. Various data/processes were assessed, especially the ArcHydro and AVSWAT interfaces used to process 50 m resolution DTMs formed from the interpolation of digitalized contour lines using ArcInfo, ArcView and Spring GIS, and a 90 m resolution SRTM DTM acquired by interferometry radar. Their accuracy was estimated based upon the pre-processing of small basic sub-basin units of different relief variations, before applying the best combinations to the entire Dourados basin. The accuracy of the automatic stream network generation and watershed delineation depends essentially on the quality of the raw digital terrain model. The selection of the most suitable one then depends completely on the aims of the user and on the work scale.

【 授权许可】

CC BY-NC