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Estimación de la velocidad de flujo del agua en cauces efímeros no aforados a partir de datos Lidar y GPS-RTK

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Estimación de la velocidad de flujo del agua en cauces efímeros no aforados a partir de datos Lidar y GPS-RTK

dc.contributor.author	Colmenárez López, Gerson R.
dc.contributor.author	Segura Beltrán, Francisca S.
dc.contributor.author	Pardo Pascual, Josep E.
dc.contributor.author	Ruiz Fernández, Luis Ángel
dc.contributor.author	Palomar Vázquez, J.
dc.date.accessioned	2013-07-16T11:25:27Z
dc.date.available	2013-07-16T11:25:27Z
dc.date.issued	2013
dc.identifier.citation	Colmenárez López, Gerson R. Segura Beltrán, Francisca Pardo Pascual, Josep Ruiz Fernández, Luis Ángel Palomar Vázquez, J. 2013 Estimación de la velocidad de flujo del agua en cauces efímeros no aforados a partir de datos Lidar y GPS-RTK Boletin de la Asociacion de Geografos Espanoles 62 7 23
dc.identifier.uri	http://hdl.handle.net/10550/29221
dc.description.abstract	The Manning formula is one of the most used to calculate the average velocity of water flow in ungauged channels. In order to be applied, it is necessary to measure in field the hydraulic radius (RH), the slope of the water surface (S), and to obtain the roughness coefficient (n), usually through tables created for this purpose. This involves a difficult, inefficient and subjective data collection in the field. This study evaluates the possibility to obtain these parameters in a more efficient manner, reducing the time of the process and allowing to work in larger areas. To achieve these objectives, the data used in this work were: 1) digital terrain models generated from airborne LiDAR data with a density of 2 points/ m2 , acquired when the channel was dry; 2) the height of the waterline and channel geometry measurements in the field using GPS; 3) Flow measurements. With this information, the velocity (Ve) was estimated and related to the average velocity of water flow (Vc) calculated from data measured in the field. The coefficient of determination between both velocity values was 73.52%, suggesting that the proposed methodology is useful to obtain the average velocity of flow, especially in remote areas or dry riverbeds.
dc.relation.ispartof	Boletin de la Asociacion de Geografos Espanoles, 2013, vol. 62, p. 7-23
dc.subject	Topografia
dc.subject	Relleu (Geografia)
dc.title	Estimación de la velocidad de flujo del agua en cauces efímeros no aforados a partir de datos Lidar y GPS-RTK
dc.type	journal article	es_ES
dc.date.updated	2013-07-16T11:25:27Z
dc.identifier.idgrec	089795
dc.rights.accessRights	open access	es_ES
dc.identifier.url	http://www.boletinage.com/62/01-COLMENAREZ.pdf