ABSTRACT

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.

摘要

自动排水管网表征提供了岩性的基本信息。因此，提出了一种新的曲折度和合流组织（TACO）指数，该指数基于合流密度的概念与曲折度的计算相结合。该指数可用于比较变薄的河床，因为它们出现在地形图上或从数字高程模型中提取时。这个新指标将曲折度高的曲折与线性和平行结构或曲折度低的曲折区分开来。树枝状排列的曲折和线性图案之间的区别取决于在移动窗口中观察到的汇合点的数量。测试区域属于 Coatzacoalcos 盆地，呈现该指数考虑的构造。结果表明，曲折配置的值低于 80，