David Granado

Independent GIS Professional

Arga and Aragón Rivers have registered at their confluence an important fluvial dynamics until the middle of 20th century. However the impacts given in both basins have intensively reduced it and have affected the fluvial planform and sediment yield. A grain size characterization of the sediments on all the sediment bars has been done in order to s...

Se ha analizado la evolución y relación entre los usos del suelo, el cauce activo y las actuaciones realizadas en el último medio siglo en las cuencas de los ríos Oiartzun y Oria. Se constata una importante reducción de la superficie del cauce activo, con estrechamiento e incremento de la vegetación, coincidiendo en el tiempo con un aumento de la s...

La cartografía en general, y la cartografía digital en particular, es una de las herramientas principales en cualquier estudio relacionado con el territorio, cualquiera que sea el elemento del territorio a analizar. La cartografía topográfica, la cartografía temática, la ortofotografía, los modelos digitales nos permiten conocer desde la distancia...

Complete 3D models of five alluvial reaches affected by the removal of Inturia dam (Leitzaran River) have been obtained through laser scanner techniques. Removal was accomplished in four phases, 3 m per year, and completed in January 2016. Data registration started before the removal started in 2013 and every year after. Therefore erosion and sedim...

The use of topographic instruments for massive data capture, like laser scanner, automatic photogrammetry or drones, is very frequent in the geometric documentation of different realities like heritage, industry or geomorphology. However, the apparent simplicity in the handling of such devices and the high speed of the measurement hides the true wo...

River dynamics, global change and human pressure in Ebro basin, channel and delta. The river Ebro and its tributaries has undergone very remarkable changes since 1950. They have suffered marked process of simplification and stabilization, both in the main river and in its main Pyrenean and Iberian tributaries. They show important changes in the cha...

Resumen Se trata de la fase inicial de un proyecto que busca la puesta en valor de los ríos en gravas, muy amenazados y en claro proceso de desaparición, siendo al mismo tiempo de alto valor patrimonial. Se presenta el censo y la propuesta preliminar de tipologías de los ríos de gravas en el Pirineo central aragonés. A partir de fotointerpretación...

The methodology and results of two dam removals in two different rivers is presented and compared. One removed all-at-once and the second one in a four-stage removal process. Methodology included topographical measurements of the channel, TLS measurements of river bed and bars and sediment grain size and transport. Morphological channel adjustments...

The application of hydrogeomorphology as a tool for river management and decision making on reference condition definition for river restoration is presented. Water Framework Directive (2000/60/CE) requires the identification of reference conditions and attainable target images, to achieve the good ecological status, taking into account the direct...

RIVER DYNAMICS, GLOBAL CHANGE AND HUMAN PRESSURE IN EBRO BASIN, CHANNEL AND DELTA. The river Ebro and its tributaries has undergone very remarkable changes since 1950. They have suffered marked process of simplification and stabilization, both in the main river and in its main Pyrenean and Iberian tributaries. They show important changes in the cha...

Dam removal has been demonstrated to be one of the most frequent and effective fluvial restoration actions but at most dam removals, especially of small dams, there has been little geomorphological monitoring. The results of the geomorphological monitoring implemented in two dams in the rivers Urumea and Leitzaran (northern Spain) are presented. Th...

The development and application of a methodology for the identification of the morphological reference condition and target image for the morphological restoration in the Oiartzun and Oria basins (Gipuzkoa) is presented. The methodology started with the identification of the geomorphological homogeneous river reaches. Two reach-making processes wer...

The development and application of a methodology for the identification of the morphological reference condition and target image for river restoration is presented. The methodology started with the identification of the geomorphological homogeneous river reaches. Two reach-making processes were developed; one based on crossed variables by GIS tool...

RESUMEN: La restauración fluvial es un dominio científico-técnico de reciente y creciente desarrollo. En España y en todos los países es muy destacable la aportación de los geógrafos a la restauración fluvial, especialmente desde el ámbito de la hidrología y la geomorfología fluvial. En este trabajo de síntesis se exponen las principales líneas tem...

The Ebro river in Zaragoza has 22 riparian forests that occupy an area greater than 600 hectares. Despite its environmental and scenic interest, these forests are still unknown by many local people. The present paper aims to disseminate and publicize the quality and variety of the riparian forest to highlight their uniqueness and include them withi...

Resumen Se presenta la metodología diseñada para el seguimiento geomorfológico del derribo de las presas de Mendaraz (río Urumea) e Inturia (río Leitzaran) en Gipuzkoa, así como los resultados obtenidos. Se han realizado secciones transversales, perfiles longitudinales, abundantes mediciones de procesos sobre testigos, mediciones con escáner láser...

Resumen Se presenta el desarrollo y la aplicación de una metodología para la identificación de la condición de referencia e imagen objetivo alcanzable para la restauración de la morfología fluvial en las cuencas de Oiartzun y Oria en Gipuzkoa. El principio metodológico lo constituye una tipificación, que identifica tramos homogéneos geomorfológicam...

In the last five decades, mountain and lowland rivers of the Iberian Peninsula have undergone noticeable hydrological and geomorphological change, in response to an overall reduction of discharge, floods and sediment supply. The causes are humaninduced land use change, the building of reservoirs and gradual climate change. In lowland river floodpla...

A methodology for dam removal monitoring and the results of two case studies is presented: Mendaraz dam (Urumea River) and Inturia dam (Leitzaran River), both located in Gipuzkoa. This monitoring is conducted by river survey cross-sections, measurements of processes and granulometrical analysis. Fast sediment erosion and sedimentation together with...

A methodology for dam removal monitoring and the results of two case studies is presented: Mendaraz dam (Urumea River) and Inturia dam (Leitzaran River), both located in Gipuzkoa. This monitoring is conducted by river survey cross-sections, measurements of processes and granulometrical analysis. Fast sediment erosion and sedimentation together with...

Small hydropower plants (SHP) affect river flow and sediment transport and thus impact river morphology. Eight hydropower schemes were studied along the meandering middle and lower reaches of Aragón River (Spain) to assess their effects on channel morphology and sediment dynamics from 1927 to 2010. GIS tools were used to measure changes in fluvial...

The geomorphological monitoring made for one year after the dam removal of Mendaraz (Gipuzkoa) has consisted of river channel cross-sections, longitudinal profiles, lateral and vertical dynamics of river banks measurements from fix points and 200 marked trees, sediment grain size, mobility and transport assessment and river bed morphologies. River...

Intensas precipitaciones en los días 19 y 20 de octubre de2012 generaron crecidas en toda la red fluvial de los afluentes pirenaicos de la cuenca del Ebro. Se presentan brevemente los registros de precipitación alcanzados, las distintas respuestas hidrológicas y las principales situaciones de riesgo. Se reflexiona sobre las consecuencias de estas c...

On 19th and 20th October of 2012 an event of intense rainfall triggered flooding processes in the whole watershed of the Pyrenean tributaries of the Ebro basin. A brief description of rainfall data, hydrological responses and risk situations is presented. A reflection of the consequences of these floods is presented along with a necessity to change...

An updated version of the IHG index is presented. The index is based on three appraisal parameters: 1) the functional quality of the fluvial system, including a) flow regime naturalness, b) sediment supply and mobility, and c) floodplain functionality; 2) the channel quality, including a) channel morphology and planform naturalness, b) riverbed con...

ABSTRACT Fluvial geomorphology can be used as a diagnostic tool to assess the state of a river system and also for the spatial and temporal monitoring of channel restoration or rehabilitation actions. For these objectives a wide range of geomorphological control variables, processes, forms, attributes, indexes and ratios can be used. Within all of...

Geographical Information Systems tools are of great interest for the evaluation of changes in land-use and for the delimitation of Fluvial Territory, here applied in the confluence of Arga and Aragón Rivers. The results show an important reduction of the surface of natural areas and therefore an increase of the anthropogenic ones. The definition of...

Channel and floodplain changes in the Aragón-Arga river confluence. A diachronic analysis of the evolution of river system using GIS tools has been developed. With georeferenced aerial photographs and orthoimages, has been quantified and mapped both the evolution of channel planform as changes in land uses in the floodplain. The most significant ch...

Es necesario un cambio de mentalidad y un replanteamiento de principios, criterios, métodos y objetivos para desarrollar nuevas propuestas de gestión y restauración fluvial. La geomorfología fluvial es reivindicada como ciencia básica en el diagnóstico del estado ambiental y como clave para el diseño de programas de gestión y restauración. El terri...

La dinámica fluvial es la clave no sólo del funcionamiento, sino también del valor ecológico, paisajístico y ambiental de los sistemas fluviales. Si se quiere conservar un río como ecosistema y como corredor ambiental en el territorio se debe proteger ante todo su dinámica hidrogeomorfológica, porque ésta es la que va a garantizar la protección de...

Resumen: La dinámica fluvial es la clave no sólo del funcionamiento, sino tam-bién del valor ecológico, paisajístico y ambiental de los sistemas fluviales. Si se quiere conservar un río como ecosistema y como corredor ambiental en el terri-torio se debe proteger ante todo su dinámica hidrogeomorfológica, porque ésta es la que va a garantizar la pro...