Alejandro Gómez-Pazo

Alejandro Gómez-Pazo
University of Santiago de Compostela | USC · Department of Geography

PhD
My research focuses on the coastal variations and the rocky coast evolution.

About

28
Publications
16,103
Reads
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87
Citations
Introduction
My research interests are related to coastal geomorphology, focusing on rocky coasts; remote sensing and GIS systems. In my PhD thesis I was analyzed the rocky coast dynamics in Galicia (Northwestern Iberian Peninsula) with different tools as UAVs images, or RFID sensors.
Additional affiliations
October 2017 - present
University of Santiago de Compostela
Position
  • Researcher
Education
September 2015 - September 2016
University of Alcalá
Field of study
  • Geographic information systems
September 2011 - July 2015
University of Santiago de Compostela
Field of study
  • Geography and spatial planning

Publications

Publications (28)
Article
Full-text available
In this study, we propose a new baseline and transect method, the open-source digital shoreline analysis system (ODSAS), which is specifically designed to deal with very irregular coastlines. We have compared the ODSAS results with those obtained using the digital shoreline analysis system (DSAS). Like DSAS, our proposed method uses a single baseli...
Article
Full-text available
Rocky coastal regions are often inaccessible due to steep slopes and high relief. Remotely sensed data can, therefore, be useful, but they often have low spatial and temporal resolution and, in the case of airborne LiDAR, if not publically available , are costly to obtain. This paper reports on the use of high-resolution images from unmanned aerial...
Article
Most research on shore platforms has been at fairly large spatial scales over distances ranging from hundreds to thousands of metres. Other work at much smaller scales, ranging from one to several decimetres, often corresponds to the dimensions of micro-erosion meter stations. Few studies have been concerned with platform morphology in which the ba...
Article
Previous studies using unmanned aerial vehicles and remote sensing techniques have provided data on group sediment dynamics and overall mobility of a boulder beach at Oia in Galicia, northwestern Spain. They recorded changes in the location and disposition of hundreds of clasts but were unable to trace the intermittent movement of individual boulde...
Article
An unmanned aerial vehicle (UAV) was flown over a boulder beach (area 20,000 m²) on the southern coast of Galicia (northwestern Spain) in May 2016, continuing earlier work based on flights over the same beach in July 2012, May 2013, and late March 2014. Digital Surface Models (DSMs) with 1.8 cm resolution were constructed from the 2014 and 2016 dat...
Article
Full-text available
Coasts are continually changing and remote sensing from satellite has the potential to both map and monitor coastal change at multiple scales. This study aims to assess the application of shorelines extracted from Multi-Spectral Imagery (MSI) and Synthetic Aperture Radar (SAR) from publicly available satellite imagery to map and capture sub-annual...
Thesis
Full-text available
The aim of this research is to deepen the knowledge of rocky coasts in general, and the Galician coasts in particular. This project carries out an analysis in different scales using the new technologies as the base to improve the coastal knowledge. Devices such as the Equotip are used at the microscale, in the mesoscale this project used RFID (Radi...
Research
Full-text available
Os humidais costeiros desempeñan un papel esencial na conservación da biodiversidade, pero tamén no control da calidade das augas de baixa profundidade da costa e como sumidoiros do CO 2 atmosférico, funcións estas non sempre recoñecidas. Malia a súa importancia ecosistémica, no contexto global, pero tamén galego, ao longo das últimas décadas asist...
Article
Full-text available
Rocky coasts represent three quarters of all coastlines worldwide. These areas are part of ecosystems of great ecological value, but their steep configuration and their elevation make field surveys difficult. This fact, together with their lower variation rates, explains the lower numbers of publications about cliffs and rocky coasts in general com...
Article
Full-text available
This work analyzes the evolution of the large shifting dune included in the Corrubedo Natural Park from 1956 until the present day. The analysis was carried out using aerial images, orthophotographs, topographic surveys and LiDAR (Light Detection and Ranging) data. Variations were analyzed in terms of four different aspects: evolution of pathways i...
Article
Full-text available
The Natura 2000 network is an ambitious European project aimed at nature conservation. Nevertheless, the identification and delimitation of habitats is a complex task and simultaneously essential for correct ecosystem management. In this study we compared the current habitat delimitation and designation and the results produced by Geographic Inform...
Chapter
Full-text available
In the Iberian Peninsula, the Alpine juniper (Juniperus communis subsp. alpina) scrub constitutes a Subalpine community associated with the highlands. After some considerations regarding its taxonomy, results are provided through vegetation mapping of two extreme locations where it can be found: Montseny Massif, located south-east of the Pyrenees,...
Conference Paper
Full-text available
La presente investigación se centra en el análisis de los cambios volumétricos producidos en una playa de bloques de granitos de grano medio localizada en una costa de alta energía en donde durante el invierno las olas pueden superar los 9 metros. En estudios previos se demostró la gran movilidad de este sector en el período 2012-2014 usando la car...
Article
Full-text available
Coastal lagoons are habitats of great environmental value. However, they are currently subject to major threats, particularly due to increasing sea levels. This study aims to identify changes-both natural and induced by anthropic activity-and their impact on the recent evolution of three different types of coastal lagoons in Galicia (Louro, Vixán,...
Article
Full-text available
Sedimentary coastal areas change rapidly and are economically and environmentally important. This research focuses on determining the extent to which natural dynamics and human activity have contributed to visible changes on Rodas, Cíes Islands in southwestern Galicia (NW Spain). The number of visitors to the islands has increased in recent years,...
Chapter
The coastline of Galicia is more than 2100 km long (POL Galicia 2010) (Fig. 2.1). Two broad types of coast can be differentiated in the region: zones with rías and zones without rías. Marine inlets dominate in the former, whereas rectilinear stretches dominate in the latter and only small coves or estuaries occur. The megaforms of coastal relief in...
Chapter
En este estudio se pretende clasificar distintas zonas del litoral gallego para así poder visualizar con claridad sus diferencias y analizar las razones que marcan los distintos paisajes. Para alcanzar este objetivo inicialmente se realizó un análisis cuantitativo en el que se han considerado la altitud del sector costero (6 categorías) y la rugosi...
Article
Full-text available
The coast of Galicia has more than 2.100 km for length. It is characterized by the chaining of rocky and sandy coast and it's located in a high energy context, subject to the passage of depressions and marine storms. In the context of global change, it is essential to know the dynamics that interact in the Galician coast to identify the most vulner...
Article
Full-text available
La costa de Galicia tiene más de 2.100 km de longitud. Se caracteriza por el encadenamiento de sectores de costa rocosa y arenosa y se halla situada en un contexto de alta energía, sometida al paso de borrascas y temporales marinos. Por ello, en el contexto del cambio global en el que nos encontramos, es fundamental conocer las dinámicas que intera...
Conference Paper
Full-text available
Recent technological advances have made it possible to improve the accuracy of coastal studies through devices such as RFID (Radio Frequency IDentification). These sensors allow the monitoring of elements of the environment at any time since its placement and offer a great level of detail. This research is developed in a boulder beach in Oia (Ponte...
Chapter
Full-text available
Esta investigación busca profundizar en el conocimiento de las costas rocosas en general, y de las gallegas en particular. En el estudio se realizarán análisis a tres escalas: en la microescala se emplearán sensores TMEM para comprobar la microerosion en la costa sur gallega. En la mesoescala el estudio se realizará con sensores RFID para conocer l...
Article
Full-text available
This study proposes a model of danger of ignition of wildfires in Galicia, the Spanish region with more fires recorded annually caused mostly by human causes. The model is based on the one proposed by Chuvieco et al. (2014), improving the spatial resolution from 1000 to 500 m, creating specific layers of human and natural causality and keeping meth...
Article
Full-text available
La preocupación por las regiones costeras ha sido muy importante a lo largo de la historia. En los últimos años, con la evolución experimentada por los SIG ha surgido una gran oportunidad de profundizar en su mejor conocimiento. La presente investigación se ha centrado en buscar una aproximación metodológica semiautomática a las costas rocosas que...
Poster
Full-text available
Caracterización de los tipos de costa que se pueden encontrar en las Illas Cíes mediante el empleo de Sistemas de Información Geográfica (SIG).
Conference Paper
Full-text available
Located at the entrance of Ría de Vigo, Illas Cíes stand out for its asymmetrical profile, with two very different facades. On the western facade, cliffs dominate reaching over 160 m of altitude and 80º slope. The eastern facade is characterized by a smooth topography with slopes that do not reach 75º and heights not exceeding 150 m chaining cliffs...

Questions

Question (1)
Question
I have a shapefile with points and a table with the points position in different dates, with your location in UTM. Each point represents an unique ID.
I want to measure de distance between the same points, same ID, in the three moments. Also, I need draw the vectors between the point in their different positions.
Someone knows how to make this in R, ArcGIS or QGIS?
Thanks!

Network

Cited By

Projects

Project (1)
Project
This project collect different works that explain the Galician coast characteristics and the main factors for their evolution