A Systematic, Automated Approach for River Segmentation Tested on the Magdalena River (Colombia) and the Baker River (Chile)

被引:5
|
作者
Nardini, Andrea [1 ,2 ]
Yepez, Santiago [3 ,4 ]
Mazzorana, Bruno [5 ]
Ulloa, Hector [5 ]
Bejarano, Maria Dolores [6 ]
Laraque, Alain [7 ]
机构
[1] Fdn CREACUA Ctr Recuperac Ecosistemas ACUaticos, Riohacha 40001, La Guajira, Colombia
[2] Univ Politecn Madrid UPM, ETSI Montes Forestal & Medio Nat, PhD Program Adv Forestry Engn, Madrid 28040, Spain
[3] Univ Concepcion UdeC, Fac Ciencias Forestales, Dept Manejo Bosques & Medio Ambiente, Concepcion 407374, Chile
[4] Univ Concepcion UdeC, Lab Geotecnol & Modelamiento Recursos Nat LGM, Concepcion 407374, Chile
[5] Univ Austral Chile, Fac Ciencias, Inst Ciencias Tierra, Valdivia 5090000, Chile
[6] Univ Politecn Madrid UPM, ETSI Montes Forestal & Medio Nat, Dept Sistemas & Recursos Nat, Madrid 28040, Spain
[7] CNRS, IRD, UPS, GET,UMR,UMR 5562,UMR 234, 900 Rue JF Breton, F-34090 Montpellier, France
关键词
river reaches; segmentation; automated approach; fluvial geomorphology; River Styles; PATTERNS;
D O I
10.3390/w12102827
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This paper proposes a systematic procedure to identify river reaches from a geomorphic point of view. Their identification traditionally relies on a subjective synthesis of multi-dimensional information (e.g., changes of slope, changes of width of valley bottom). We point out that some of the attributes adopted to describe geomorphic characters of a river (in particular sinuosity and confinement) depend on the length of reaches, while these latter are not yet identified; this is a source of ambiguity and introduces, at least conceptually, an unpleasant, implicit, iterative procedure. We introduce a new method which avoids this difficulty. Furthermore, it is simple, objective, and explicitly defined, and as such, it is automatable. The method requires to define and determine a set of intensive attributes, i.e., attributes that are independent of the segment length. The reaches are then identified by the intersection of the segmentations induced by such attributes. We applied the proposed procedure in two case studies, the Magdalena River (Colombia) and the Baker River (Chile), and investigated whether the adoption of the traditional approach for the definition of reaches would lead to a different result. We conclude that there would be no detectable differences. As such, the method can be considered an improvement in geomorphic river characterization.
引用
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页数:25
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