Drainage network characterization based on confluence organization and tortuosity
Por:
Ramirez Nunez, Carolina, Parrot, Jean-Francois
Publicada:
10 sep 2022
Categoría:
Water science and technology
Resumen:
Automatic drainage network characterization provides basic information
on lithology. Thus, a new Tortuosity and Confluence Organization (TACO)
index, based on the notion of confluence density coupled with the
calculation of tortuosity, is proposed. This index can be used to
compare thinned riverbeds as they appear on topographic maps or when
extracted from a digital elevation model. This new index distinguishes
meanders with a high degree of tortuosity from linear and parallel
structures or meanders with low tortuosity. The distinction between
meanders and linear patterns from dendritic arrangements depends on the
number of confluences observed in a moving window. The tested area
belongs to the Coatzacoalcos basin, which presents the configurations
considered by this index. Results show that the meander configuration
has values lower than 80, linear patterns have values around 100, and
dendritic configurations are between 120 and 200. Thus, this index can
be used to map a region according to the drainage network configuration.
Filiaciones:
Ramirez Nunez, Carolina:
Univ Nacl Autonoma Mexico, Escuela Nacl Ciencias Tierra ENCiT, Mexico City, DF, Mexico
Parrot, Jean-Francois:
Univ Nacl Autonoma Mexico, Inst Geog, Lab Anal Geoespacial, Mexico City, DF, Mexico
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