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Prof. Esperanza Ayuga-Téllez
Departamento de Ingeniería y Gestión Forestal y Ambiental, Universidad Politécnica de Madrid, Madrid, España

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0 Agroforestry
0 Environmental Engineering
0 Higher Education
0 Landscape
0 Public Participation

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Agroforestry
Landscape
Public Participation
Valuation methods of urban trees

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Journal article
Published: 22 August 2021 in Forests
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We present a new method for the classification of beech (Fagus sylvatica L.) forest plots based on discriminant and frequency analysis. This method can be used as a tool to allow experts to stratify beech forests in a simple and precise way. The method is based on discriminant analysis with cross-validation of 13 variables measured in 142 plots from the 2005 Second National Forest Inventory and 63 plots from an inventory installed in specific locations together with a frequency analysis of the qualifying variables. In the first stage, the method uses the results of a frequency analysis fitted with an iterative discriminant analysis that allows improving the subsequent classifications taking into account the results of the analysis and the correctly- and wrong-classified plots. This method is applied to beech forest in Burgos (Spain) where six structural groups were described. The discriminant functions show that forest structure depends basically on diameter distribution and almost 94% of the plots are correctly classified using this methodology. The high level of correctly assigned plots indicates an accurate classification of structure that can be used to stratify beech forests with only the diameter at breast height measurement.

ACS Style

Alvaro Sánchez-Medina; Esperanza Ayuga-Téllez; Maria Angeles Grande-Ortiz; Concepción González-García; Antonio García-Abril. Iterative Method of Discriminant Analysis to Classify Beech (Fagus sylvatica L.) Forest. Forests 2021, 12, 1128 .

AMA Style

Alvaro Sánchez-Medina, Esperanza Ayuga-Téllez, Maria Angeles Grande-Ortiz, Concepción González-García, Antonio García-Abril. Iterative Method of Discriminant Analysis to Classify Beech (Fagus sylvatica L.) Forest. Forests. 2021; 12 (8):1128.

Chicago/Turabian Style

Alvaro Sánchez-Medina; Esperanza Ayuga-Téllez; Maria Angeles Grande-Ortiz; Concepción González-García; Antonio García-Abril. 2021. "Iterative Method of Discriminant Analysis to Classify Beech (Fagus sylvatica L.) Forest." Forests 12, no. 8: 1128.

Research paper
Published: 28 January 2021 in Annals of Forest Science
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We successfully transformed Pinus sylvestris yield tables into diameter distribution models. The best results were obtained with the parameter recovery method based on both mean and quadratic mean diameter, which explained 70% of the variability of frequencies by diameter classes and provided better results in the analysis of errors. On the other hand, the method based on stand density, dominant diameter and quadratic mean diameter explained less variability of frequencies by diameter classes (64.4%). Old datasets used to develop yield table models can be recovered to transform those yield tables into diameter distribution models that provide a more detailed description of size variability and forest structure. We used archived measurements collected to develop yield table models for Pinus sylvestris L in central Spain, to transform those yield tables into a diameter distribution model by using parameter recovery methods. We compared two different parameter recovery methods, one based on both mean and quadratic mean diameter and another one based on dominant diameter, stand density and quadratic mean diameter and used a set of 104 even aged plots to analyze the performance of the said methods for the transformation of Pinus sylvestris L yield tables in central Spain into a diameter distribution model. The parameter recovery method based on both mean and quadratic mean diameter explained 70% of the variability of frequencies by diameter classes and provided better results than the method based on stand density, dominant diameter and quadratic mean diameter that explained 64.4% of the variability of frequencies by diameter classes. However, more important than the method itself were the errors that propagated from the models predicting the different variables used in the parameter recovery. Based on the results from the analysis of errors by diameter classes, the method using both mean and quadratic mean diameter outperformed the method using dominant diameter, stand density and quadratic mean diameter and is the best option to transform P. sylvestris yield tables into diameter distribution models.

ACS Style

Francisco Mauro; Antonio García-Abril; Esperanza Ayuga-Téllez; Alberto Rojo-Alboreca; Ruben Valbuena; José Antonio Manzanera. Comparison of two parameter recovery methods for the transformation of Pinus sylvestris yield tables into a diameter distribution model. Annals of Forest Science 2021, 78, 1 -15.

AMA Style

Francisco Mauro, Antonio García-Abril, Esperanza Ayuga-Téllez, Alberto Rojo-Alboreca, Ruben Valbuena, José Antonio Manzanera. Comparison of two parameter recovery methods for the transformation of Pinus sylvestris yield tables into a diameter distribution model. Annals of Forest Science. 2021; 78 (1):1-15.

Chicago/Turabian Style

Francisco Mauro; Antonio García-Abril; Esperanza Ayuga-Téllez; Alberto Rojo-Alboreca; Ruben Valbuena; José Antonio Manzanera. 2021. "Comparison of two parameter recovery methods for the transformation of Pinus sylvestris yield tables into a diameter distribution model." Annals of Forest Science 78, no. 1: 1-15.

Journal article
Published: 23 February 2020 in Agronomy
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The determination of an asset’s economic value has always been an important step in improving its management. The Madrid Region legislated the application of the first version of the Norma Granada as a method of appraising ornamental trees. However, the trees in the city of Madrid are only assessed in terms of ecosystem services (i-Tree Eco). A photograph of the asset to be appraised is often used in studies on the valuation of publicly-owned socio-environmental assets such as trees or landscapes. As a tree’s value is very closely linked to its size and to a number of features that can be seen through direct observation of the specimen, it is important to verify the validity of photographs as a method for obtaining the public’s opinion. This work presents a comparison between the valuations chosen by members of the public when observing the tree in situ and in a photograph. The aim is to verify the validity of photographs for their application to a larger sample and to understand qualitatively how citizens assess the trees in a city. The following appraisal methods were used: the American method, Council of Tree Landscape Appraisers (CTLA), Norma Granada and the Burnley method. The survey consisted of ten specimens from ten different species, and ten surveys were taken for each stem, making a total of 100 for each tree species and 1000 surveys in all. The surveys were done randomly and individually. Each interviewed chose one of the three values they were shown when observing the specimen in the photograph and in situ; 84% of the 1000 surveys gave as a result the same value choice when looking at the specimen on site and seeing it in a photograph.

ACS Style

Claudia García-Ventura; Alfonso Bermejo; Concepción González-García; M. Ángeles Grande-Ortíz; Esperanza Ayuga-Téllez; Álvaro Sánchez De Medina-Garrido; Juan José Ramírez-Montoro. Analysis of Differences in the Choice of the Economic Value of Urban Trees in Madrid When Displayed in Situ and in Photographs. Agronomy 2020, 10, 311 .

AMA Style

Claudia García-Ventura, Alfonso Bermejo, Concepción González-García, M. Ángeles Grande-Ortíz, Esperanza Ayuga-Téllez, Álvaro Sánchez De Medina-Garrido, Juan José Ramírez-Montoro. Analysis of Differences in the Choice of the Economic Value of Urban Trees in Madrid When Displayed in Situ and in Photographs. Agronomy. 2020; 10 (2):311.

Chicago/Turabian Style

Claudia García-Ventura; Alfonso Bermejo; Concepción González-García; M. Ángeles Grande-Ortíz; Esperanza Ayuga-Téllez; Álvaro Sánchez De Medina-Garrido; Juan José Ramírez-Montoro. 2020. "Analysis of Differences in the Choice of the Economic Value of Urban Trees in Madrid When Displayed in Situ and in Photographs." Agronomy 10, no. 2: 311.

Journal article
Published: 04 July 2018 in Forests
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This paper formulates a new strategy for participatory forest management consisting of encouraging public participation as long as it increases empathy among participants. The strategy requires the homogeneous representation of the opinion of a participant (i.e., to determine how they assess a forest plan and identify the best one). Utility assessments are prepared for participants through pair-comparisons between meaningful points in the territory and from value functions based on forest indicators. The best plan is designed by applying combinatorial optimization algorithms to the utility of a participant. The calculating of empathy—of one participant relative to another—is based on the equivalence of their respective utilities when the current forest plan is modified. This involves calculating the opinions that are due to systematic changes in the collective plan for those participants that each participant supposes will affect the utility of the other participants. Calculating empathy also requires knowing the interactions among participants, which have been incorporated through agent-based simulation models. Application of the above methodology has confirmed the association between increases in empathy and convergence of opinions in different scenarios: well and medium-informed participants and with and without interaction among them, which verifies the proposed strategy. In addition, this strategy is easily integrated into available information systems and its outcomes show advantages over current participatory applications.

ACS Style

Eugenio Martínez-Falero; Concepción González-García; Antonio García-Abril; Esperanza Ayuga-Téllez. Validation of a Methodology for Confidence-Based Participatory Forest Management. Forests 2018, 9, 399 .

AMA Style

Eugenio Martínez-Falero, Concepción González-García, Antonio García-Abril, Esperanza Ayuga-Téllez. Validation of a Methodology for Confidence-Based Participatory Forest Management. Forests. 2018; 9 (7):399.

Chicago/Turabian Style

Eugenio Martínez-Falero; Concepción González-García; Antonio García-Abril; Esperanza Ayuga-Téllez. 2018. "Validation of a Methodology for Confidence-Based Participatory Forest Management." Forests 9, no. 7: 399.

Journal article
Published: 10 March 2018 in Forests
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Urban trees are generally considered to be a public asset and are an important part of a city’s heritage. The aim of this work is to analyse the influence of season on the economic appraisal of various trees in Madrid. Photographs were taken of 43 individual tree specimens in summer and winter. The survey was designed to compare differences of opinion in the economic assessment of trees. The trees were assessed by eight valuation methods used worldwide. A total of 78 agroforestry engineering students answered a written survey, and the variables considered were: percentage of students who always evaluated the tree equally (%0), percentage of students who assigned more value to the summer photograph (%S), and percentage of students who assigned more value to the winter photograph (%W). The results were analysed by the statistical test of equal proportions and ANOVA to detect differences according to tree type (evergreen or deciduous), species, and other groupings made by the authors in previous works. W and S percentages are similar. The ANOVA analysis rejects the equality of percentages of S and W between groups. The Welch test rejects the equality of the percentage of S, W, and O between species.

ACS Style

Claudia García-Ventura; Álvaro Sánchez-Medina; M. Ángeles Grande-Ortíz; Concepcion Gonzalez-Garcia; Esperanza Ayuga-Téllez. Comparison of the Economic Value of Urban Trees through Surveys with Photographs in Two Seasons. Forests 2018, 9, 132 .

AMA Style

Claudia García-Ventura, Álvaro Sánchez-Medina, M. Ángeles Grande-Ortíz, Concepcion Gonzalez-Garcia, Esperanza Ayuga-Téllez. Comparison of the Economic Value of Urban Trees through Surveys with Photographs in Two Seasons. Forests. 2018; 9 (3):132.

Chicago/Turabian Style

Claudia García-Ventura; Álvaro Sánchez-Medina; M. Ángeles Grande-Ortíz; Concepcion Gonzalez-Garcia; Esperanza Ayuga-Téllez. 2018. "Comparison of the Economic Value of Urban Trees through Surveys with Photographs in Two Seasons." Forests 9, no. 3: 132.

Journal article
Published: 07 July 2017 in Sustainability
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It is important today to take account of the opinions of both experts and stakeholders in the sustainable management of forests. SILVANET (Universidad Politécnica de Madrid, Madrid, Spain) is a software package that offers a useful methodology for assessing the preferences of individuals or groups, and applying them to the design of a sustainable forest management plan. The program starts by identifying the personal preferences of the evaluators based on information provided individually when comparing and selecting sustainability options from a series of site pairs. The evaluator is given information on certain sustainability indicators obtained in the area to be assessed. The scope of the evaluator’s knowledge of sustainable forest management and the consistency of his/her decisions is assessed, and he/she is then included in a group of people with similar systems of preferences to encourage interaction between evaluators in the same group. The preferences are characterized by matrices that encode individual assessments, the maximization of their utility and the analysis of past decisions. Finally, by identifying preferences, we are able to design the forest management system that maximizes the concept of sustainability for each individual or group of individuals. In this paper, we present the results of its application to mono-specific conifer forest stands, although it can be adapted to other forest types. The forestry management experts classify its usability as good, although non-expert users give it a lower rating.

ACS Style

Jose Eugenio Martínez-Falero; Esperanza Ayuga-Tellez; Concepcion Gonzalez-Garcia; M. Angeles Grande-Ortiz; Alvaro Sánchez De Medina Garrido. Experts’ Analysis of the Quality and Usability of SILVANET Software for Informing Sustainable Forest Management. Sustainability 2017, 9, 1200 .

AMA Style

Jose Eugenio Martínez-Falero, Esperanza Ayuga-Tellez, Concepcion Gonzalez-Garcia, M. Angeles Grande-Ortiz, Alvaro Sánchez De Medina Garrido. Experts’ Analysis of the Quality and Usability of SILVANET Software for Informing Sustainable Forest Management. Sustainability. 2017; 9 (7):1200.

Chicago/Turabian Style

Jose Eugenio Martínez-Falero; Esperanza Ayuga-Tellez; Concepcion Gonzalez-Garcia; M. Angeles Grande-Ortiz; Alvaro Sánchez De Medina Garrido. 2017. "Experts’ Analysis of the Quality and Usability of SILVANET Software for Informing Sustainable Forest Management." Sustainability 9, no. 7: 1200.

Journal article
Published: 18 January 2017 in Computer Applications in Engineering Education
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ACS Style

María A. Grande-Ortiz; Gonzalo Tevar-Sanz; Esperanza Ayuga-Téllez; Concepción González-García; Álvaro Sánchez-De Medina; Juan José Ramírez-Montoro. Cooperative learning in Forestry Engineering with NIPPE Descartes software. Computer Applications in Engineering Education 2017, 25, 103 -111.

AMA Style

María A. Grande-Ortiz, Gonzalo Tevar-Sanz, Esperanza Ayuga-Téllez, Concepción González-García, Álvaro Sánchez-De Medina, Juan José Ramírez-Montoro. Cooperative learning in Forestry Engineering with NIPPE Descartes software. Computer Applications in Engineering Education. 2017; 25 (1):103-111.

Chicago/Turabian Style

María A. Grande-Ortiz; Gonzalo Tevar-Sanz; Esperanza Ayuga-Téllez; Concepción González-García; Álvaro Sánchez-De Medina; Juan José Ramírez-Montoro. 2017. "Cooperative learning in Forestry Engineering with NIPPE Descartes software." Computer Applications in Engineering Education 25, no. 1: 103-111.

Journal article
Published: 10 June 2016 in Journal of Agricultural Engineering
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This paper describes the entire process of the implementation of the Spanish low volume road network, including the design criteria, the construction techniques and the management policies during all the periods. The current situation of low volume roads in Spain was analyzed with respect to the legal framework and their actual condition. In addition, the budget required for the repair of 41 low volume roads throughout Spain was calculated in order to statistically analyze the influence of the pavement materials and the period of construction. The main conclusions were that low volume roads constructed during the 1970´s are currently those in the best state of repair and those requiring the lower repair costs, even lower than those constructed after 1980´s. In addition, low volume roads constructed with higher quality materials and using standardized techniques required five times lower repair costs than those made of lower quality materials.

ACS Style

Eutiquio Gallego; Manuel Moya; Esperanza Ayuga-Téllez; Ana I. García; Francisco Ayuga. The influence of management and construction methods in the repair costs of Spain’s low-volume road network. Journal of Agricultural Engineering 2016, 47, 118 .

AMA Style

Eutiquio Gallego, Manuel Moya, Esperanza Ayuga-Téllez, Ana I. García, Francisco Ayuga. The influence of management and construction methods in the repair costs of Spain’s low-volume road network. Journal of Agricultural Engineering. 2016; 47 (2):118.

Chicago/Turabian Style

Eutiquio Gallego; Manuel Moya; Esperanza Ayuga-Téllez; Ana I. García; Francisco Ayuga. 2016. "The influence of management and construction methods in the repair costs of Spain’s low-volume road network." Journal of Agricultural Engineering 47, no. 2: 118.

Journal article
Published: 07 March 2016 in Environmetrics
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Empirical best linear unbiased predictors (EBLUPs) based on auxiliary information are efficient for estimating means or totals of environmental attributes in small domains. In small area estimation, the EBLUPs and their approximately unbiased mean square error (MSE) estimators are obtained under the premise of having a large number of population units in the target domain. In remote sensing, single pixels are regarded as population units, and EBLUPs and MSE estimators may also be required for subdomains containing a low number of pixels or even single pixels. In this study, EBLUPs, their MSE, and an unbiased estimator of the MSE are derived when predicting linear parameters for subdomains with a small number of population units that do not intersect with the training sample. In these situations, an additional MSE component should be considered to prevent MSE underestimation. A case study illustrates the applicability of the obtained results in the context of a Light Detection and Ranging-based forest inventory, where estimates are provided for areas of interest sizing from single pixels or population units to thousands of hectares. Based on our results, we recommend to consider the additional component in the MSE estimator when estimating in pixels and domains of interest sizing few hectares. Copyright © 2016 John Wiley & Sons, Ltd.

ACS Style

F. Mauro; I. Molina; A. García-Abril; Ruben Valbuena; Esperanza Ayuga Tellez. Remote sensing estimates and measures of uncertainty for forest variables at different aggregation levels. Environmetrics 2016, 27, 225 -238.

AMA Style

F. Mauro, I. Molina, A. García-Abril, Ruben Valbuena, Esperanza Ayuga Tellez. Remote sensing estimates and measures of uncertainty for forest variables at different aggregation levels. Environmetrics. 2016; 27 (4):225-238.

Chicago/Turabian Style

F. Mauro; I. Molina; A. García-Abril; Ruben Valbuena; Esperanza Ayuga Tellez. 2016. "Remote sensing estimates and measures of uncertainty for forest variables at different aggregation levels." Environmetrics 27, no. 4: 225-238.

Journal article
Published: 01 January 2016 in Bosque (Valdivia)
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ACS Style

Esperanza Ayuga-Téllez; M Lucrecia Contato-Carol; Claudia García-Ventura; Álvaro Sánchez De Medina; M. Angeles Grande Ortiz; Concepción González-García. Obtención de valores unitarios mediante el método de árboles-tipo para la tasación del arbolado urbano: aplicación en Santiago del Estero (Argentina) y Madrid (España). Bosque (Valdivia) 2016, 37, 53 -62.

AMA Style

Esperanza Ayuga-Téllez, M Lucrecia Contato-Carol, Claudia García-Ventura, Álvaro Sánchez De Medina, M. Angeles Grande Ortiz, Concepción González-García. Obtención de valores unitarios mediante el método de árboles-tipo para la tasación del arbolado urbano: aplicación en Santiago del Estero (Argentina) y Madrid (España). Bosque (Valdivia). 2016; 37 (1):53-62.

Chicago/Turabian Style

Esperanza Ayuga-Téllez; M Lucrecia Contato-Carol; Claudia García-Ventura; Álvaro Sánchez De Medina; M. Angeles Grande Ortiz; Concepción González-García. 2016. "Obtención de valores unitarios mediante el método de árboles-tipo para la tasación del arbolado urbano: aplicación en Santiago del Estero (Argentina) y Madrid (España)." Bosque (Valdivia) 37, no. 1: 53-62.

Journal article
Published: 01 January 2016 in Formación universitaria
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ACS Style

Álvaro Sánchez-Medina; Claudia García-Ventura; Esperanza Ayuga-Téllez. Análisis y Comparación de la Información mostrada en las Webs Españolas y Extranjeras Relativa a Programas de Doctorado en el Área Agroforestal. Formación universitaria 2016, 9, 97 -106.

AMA Style

Álvaro Sánchez-Medina, Claudia García-Ventura, Esperanza Ayuga-Téllez. Análisis y Comparación de la Información mostrada en las Webs Españolas y Extranjeras Relativa a Programas de Doctorado en el Área Agroforestal. Formación universitaria. 2016; 9 (5):97-106.

Chicago/Turabian Style

Álvaro Sánchez-Medina; Claudia García-Ventura; Esperanza Ayuga-Téllez. 2016. "Análisis y Comparación de la Información mostrada en las Webs Españolas y Extranjeras Relativa a Programas de Doctorado en el Área Agroforestal." Formación universitaria 9, no. 5: 97-106.

Journal article
Published: 01 October 2014 in Computers and Electronics in Agriculture
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ACS Style

Esperanza Ayuga-Téllez; Francisco Mauro-Gutiérrez; Antonio García-Abril; Concepción González-García; J. Eugenio Martínez-Falero. Comparison of estimation methods to obtain ideal distribution of forest tree height. Computers and Electronics in Agriculture 2014, 108, 191 -199.

AMA Style

Esperanza Ayuga-Téllez, Francisco Mauro-Gutiérrez, Antonio García-Abril, Concepción González-García, J. Eugenio Martínez-Falero. Comparison of estimation methods to obtain ideal distribution of forest tree height. Computers and Electronics in Agriculture. 2014; 108 ():191-199.

Chicago/Turabian Style

Esperanza Ayuga-Téllez; Francisco Mauro-Gutiérrez; Antonio García-Abril; Concepción González-García; J. Eugenio Martínez-Falero. 2014. "Comparison of estimation methods to obtain ideal distribution of forest tree height." Computers and Electronics in Agriculture 108, no. : 191-199.

Journal article
Published: 01 April 2013 in Forest Systems
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Aim of study: The aim of this work is to test the positive effect of a substantially developed resin sector on rural demographic evolution. This work shows how in the period between 1970 and 2010 the demographic decline in the interior regions of Spain was more pronounced in areas characterized by the importance of resin-producing forest stands compared to other nearby rural municipalities where this natural resource is not present.Area of study: The study area consists of a set of rural municipalities in Central Spain, both resin and non-resin producing, in the provinces of Segovia, Avila, Valladolid, Burgos, Soria, Cuenca and Guadalajara.Material and methods: The relationship between resin production and population in resin and non-resin producing municipalities was modeled by means of linear regression analysis.Main results: Generally speaking, between 1950 and 1970 the production of resin halted demographic decline in the regions where this activity was substantially developed. However, when the resin sector entered into crisis in the 1970s, and the economic repercussions of this activity gradually ceased to be felt, the demographic decline in the regions which had been involved in resin production was much more acute than in other non-resin-producing rural areas.Research highlights: This work shows the relationship between resin extraction activity and population evolution in rural municipalities. Sustainable resin exploitation can contribute to the maintenance and development of rural communities, and should be used as a tool for generating employment in rural areas.Key words: demography; economic crisis; resin sector; rural development.

ACS Style

S. F. Ortuño Perez; F. Garcia-Robredo; Esperanza Ayuga Tellez; C. Fullana Belda. Effects of the crisis in the resin sector on the demography of rural municipalities in Spain. Forest Systems 2013, 22, 39 .

AMA Style

S. F. Ortuño Perez, F. Garcia-Robredo, Esperanza Ayuga Tellez, C. Fullana Belda. Effects of the crisis in the resin sector on the demography of rural municipalities in Spain. Forest Systems. 2013; 22 (1):39.

Chicago/Turabian Style

S. F. Ortuño Perez; F. Garcia-Robredo; Esperanza Ayuga Tellez; C. Fullana Belda. 2013. "Effects of the crisis in the resin sector on the demography of rural municipalities in Spain." Forest Systems 22, no. 1: 39.

Journal article
Published: 01 August 2012 in Journal of Food Engineering
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ACS Style

Carlos Gonzalez Montellano; José María Fuentes; Esperanza Ayuga Tellez; Francisco Ayuga. Determination of the mechanical properties of maize grains and olives required for use in DEM simulations. Journal of Food Engineering 2012, 111, 553 -562.

AMA Style

Carlos Gonzalez Montellano, José María Fuentes, Esperanza Ayuga Tellez, Francisco Ayuga. Determination of the mechanical properties of maize grains and olives required for use in DEM simulations. Journal of Food Engineering. 2012; 111 (4):553-562.

Chicago/Turabian Style

Carlos Gonzalez Montellano; José María Fuentes; Esperanza Ayuga Tellez; Francisco Ayuga. 2012. "Determination of the mechanical properties of maize grains and olives required for use in DEM simulations." Journal of Food Engineering 111, no. 4: 553-562.

Journal article
Published: 19 July 2012 in Water Resources Management
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Climate change, drought and the world’s growing population are increasing the demand for water which in turn requires improved water resources management. The sustainable management of a watershed requires a thorough knowledge of its water resources, including monthly streamflow. Spain is home to a large number of ungauged watersheds, the streamflows of which are often unknown. Chavez et al. (2007) reported a model for predicting monthly streamflow in ungauged watersheds that was validated for use in areas of tropical climate in Central America and a dry area in South America. This work reports an attempt to assess the performance of this model for eventual use with ungauged watersheds in Spain, using data for a number of watersheds for which gauging data were available. The proposed model took into account physical characteristics such us the soil infiltration rate, the slope of the terrain, plant fractional cover, the monthly moisture adequacy index, and the leaf area index. Comparisons of model-predicted monthly streamflows and those actually measured showed the Chavez et al. model unable to make reliable predictions for Spanish watersheds in its current form. A new approach has been developed considering only smaller watersheds in Spanish conditions, changing parameters in the original model. These parameters have been calibrated and validated, reaching adequate adjustment of results.

ACS Style

J. Vicente-Guillén; Esperanza Ayuga Tellez; D. Otero; J. L. Chavez; F. Ayuga; Ana Isabel Garcia. Performance of a Monthly Streamflow Prediction Model for Ungauged Watersheds in Spain. Water Resources Management 2012, 26, 3767 -3784.

AMA Style

J. Vicente-Guillén, Esperanza Ayuga Tellez, D. Otero, J. L. Chavez, F. Ayuga, Ana Isabel Garcia. Performance of a Monthly Streamflow Prediction Model for Ungauged Watersheds in Spain. Water Resources Management. 2012; 26 (13):3767-3784.

Chicago/Turabian Style

J. Vicente-Guillén; Esperanza Ayuga Tellez; D. Otero; J. L. Chavez; F. Ayuga; Ana Isabel Garcia. 2012. "Performance of a Monthly Streamflow Prediction Model for Ungauged Watersheds in Spain." Water Resources Management 26, no. 13: 3767-3784.

Journal article
Published: 01 January 2012 in Formación universitaria
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Se presenta la elaboración de un cuestionariopara evaluar conocimientos básicos de estadística para estudiantes de ingeniería. El cuestionario original incluyó un amplio número de ítems agrupados por bloques temáticos. Este se propuso a un panel de expertos, formado por nueve profesores de la asignatura de Estadística Aplicada de distintas titulaciones de ingeniería en universidades iberoamericanas

ACS Style

Esperanza Ayuga-Téllez; Concepción González-García; María A Grande-Ortiz; Eugenio Martínez-Falero; María A -Ortiz. Diseño de un cuestionario para evaluar conocimientos básicos de estadística de estudiantes del último curso de ingeniería. Formación universitaria 2012, 5, 21 -32.

AMA Style

Esperanza Ayuga-Téllez, Concepción González-García, María A Grande-Ortiz, Eugenio Martínez-Falero, María A -Ortiz. Diseño de un cuestionario para evaluar conocimientos básicos de estadística de estudiantes del último curso de ingeniería. Formación universitaria. 2012; 5 (1):21-32.

Chicago/Turabian Style

Esperanza Ayuga-Téllez; Concepción González-García; María A Grande-Ortiz; Eugenio Martínez-Falero; María A -Ortiz. 2012. "Diseño de un cuestionario para evaluar conocimientos básicos de estadística de estudiantes del último curso de ingeniería." Formación universitaria 5, no. 1: 21-32.

Journal article
Published: 01 September 2011 in Journal of Urban Planning and Development
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The urban canopy is a very valuable element in cities, and its environmental benefits are significant. It is very important for cities to assess adequately their canopy. An important part of its value is related to the tree number density according to the population density. The most commonly used methods for tree appraisal use subjective means to obtain the influence of location. A new methodology is developed in this work to obtain an objective location index. The proposed index gives a value to the tree according to its location in the city. A multiple regression model (function of the canopy density per inhabitant and the urban area percentage) is used to calculate the location index. The index has been calculated for the neighborhoods of the city of Santiago del Estero, Argentina, but can be applied to any city with objective variables, available from any local administration.

ACS Style

Esperanza Ayuga-Téllez; María Lucrecia Contato-Carol; Concepcion Gonzalez; María Ángeles Grande-Ortiz; Javier Velázquez. Applying Multivariate Data Analysis as Objective Method for Calculating the Location Index for Use in Urban Tree Appraisal. Journal of Urban Planning and Development 2011, 137, 230 -237.

AMA Style

Esperanza Ayuga-Téllez, María Lucrecia Contato-Carol, Concepcion Gonzalez, María Ángeles Grande-Ortiz, Javier Velázquez. Applying Multivariate Data Analysis as Objective Method for Calculating the Location Index for Use in Urban Tree Appraisal. Journal of Urban Planning and Development. 2011; 137 (3):230-237.

Chicago/Turabian Style

Esperanza Ayuga-Téllez; María Lucrecia Contato-Carol; Concepcion Gonzalez; María Ángeles Grande-Ortiz; Javier Velázquez. 2011. "Applying Multivariate Data Analysis as Objective Method for Calculating the Location Index for Use in Urban Tree Appraisal." Journal of Urban Planning and Development 137, no. 3: 230-237.

Journal article
Published: 31 August 2011 in Agriculture, Ecosystems & Environment
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The present work proposes a simplified model for assessing the quality of landscapes from rural roads in Spain. The proposed model is based on the full Cañas method but takes into account only four of the 16 factors, the latter contemplates: vegetation, land use, form (elements differing from the background) and texture (reflection of light from surfaces). The procedure was tested by assessing the landscapes captured in 109 photographs taken from sections of rural roads around Spain and comparing the results with (a) those obtained using the full Cañas model, and (b) the landscape preferences of the evaluators determined using the Likert scale. The correlation between the Cañas method and the proposed model was strong (R2 = 98.5%), indicating that the simplified model is sufficient for landscape quality assessment in the present setting. A strong correlation (R2 = 96.24%) was also found between the landscape quality values obtained using the simplified model and the landscape preferences of the evaluators recorded via the Likert scale. The proposed model differentiates between the landscapes seen from the rural roads better than the Cañas method and could be used in the planning of rural roads and other transport infrastructures (greenways, railways, highways, etc.) around Spain and even in other parts of the Mediterranean after further validation. It might also be employed in the decision-making process surrounding the investments to be made in existing but deteriorated rural roads with agricultural and/or leisure uses.

ACS Style

Alvaro Ramírez; Esperanza Ayuga-Téllez; Eutiquio Gallego; José María Fuentes; Ana Isabel Garcia. A simplified model to assess landscape quality from rural roads in Spain. Agriculture, Ecosystems & Environment 2011, 142, 205 -212.

AMA Style

Alvaro Ramírez, Esperanza Ayuga-Téllez, Eutiquio Gallego, José María Fuentes, Ana Isabel Garcia. A simplified model to assess landscape quality from rural roads in Spain. Agriculture, Ecosystems & Environment. 2011; 142 (3-4):205-212.

Chicago/Turabian Style

Alvaro Ramírez; Esperanza Ayuga-Téllez; Eutiquio Gallego; José María Fuentes; Ana Isabel Garcia. 2011. "A simplified model to assess landscape quality from rural roads in Spain." Agriculture, Ecosystems & Environment 142, no. 3-4: 205-212.

Journal article
Published: 01 January 2010 in Formación universitaria
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En este trabajo se establecen las competencias genéricas y específicas a conseguir en titulaciones de Ingeniería Forestal adaptadas al Espacio Europeo de Educación Superior en España. Basándose en el concepto de Ingeniería Forestal, la legislación y las recomendaciones de asociaciones de ingenieros europeos y latino americanos, se seleccionaron diez competencias genéricas y catorce específicas. Los resultados se validaron mediante la técnica de investigación cualitativa de grupos naturales de discusión. Las materias para desarrollar estas competencias se agruparon en básicas, fundamentos de la ingeniería y ciencias agroforestales. El estudio muestra que las ciencias agroforestales requieren formación práctica para adquirir competencias específicas de la Ingeniería Forestal.

ACS Style

Esperanza Ayuga-Téllez; Concepción González-García; María A Grande-Ortiz. Análisis de competencias en el Grado de Ingeniería Forestal para su adaptación al Espacio Europeo de Educación Superior. Formación universitaria 2010, 3, 3 -14.

AMA Style

Esperanza Ayuga-Téllez, Concepción González-García, María A Grande-Ortiz. Análisis de competencias en el Grado de Ingeniería Forestal para su adaptación al Espacio Europeo de Educación Superior. Formación universitaria. 2010; 3 (3):3-14.

Chicago/Turabian Style

Esperanza Ayuga-Téllez; Concepción González-García; María A Grande-Ortiz. 2010. "Análisis de competencias en el Grado de Ingeniería Forestal para su adaptación al Espacio Europeo de Educación Superior." Formación universitaria 3, no. 3: 3-14.

Journal article
Published: 31 October 2009 in Land Use Policy
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The purpose of this paper is to validate a model for predicting the public's preference for a landscape using simple statistical techniques. The model assigns numerical values to 42 landscape variables grouped into physical, aesthetic and psychological attributes. The landscape value is obtained using an additive value function. The results of the model on certain landscapes are compared with the preference expressed by the public in a survey of 183 people. The homogeneity of the survey responses was checked in each photograph. It was determined that means and standard deviations of the scores represent the true preference. A strong positive association was observed between preference and certain landscape attributes such as expression, soil use or colour. A marked negative association was detected with respect to landscape alterations. A linear regression was carried out to analyse the predictive capacity of the model. The independent variable was the global score assigned by the model to each photograph and the dependant variable was the mean of the scores assigned by the survey respondents. The high level of correlation obtained indicates that the model is a good predictor of the public's preferences in relation to the set of photographs shown in the survey. To complete the analysis of the model as a preference predictor, a multiple linear regression was carried out between the mean score obtained in the survey and the model elements. Attributes and variables that have the greatest influence on pubic preference were detected.

ACS Style

I. Cañas; E. Ayuga; F. Ayuga. A contribution to the assessment of scenic quality of landscapes based on preferences expressed by the public. Land Use Policy 2009, 26, 1173 -1181.

AMA Style

I. Cañas, E. Ayuga, F. Ayuga. A contribution to the assessment of scenic quality of landscapes based on preferences expressed by the public. Land Use Policy. 2009; 26 (4):1173-1181.

Chicago/Turabian Style

I. Cañas; E. Ayuga; F. Ayuga. 2009. "A contribution to the assessment of scenic quality of landscapes based on preferences expressed by the public." Land Use Policy 26, no. 4: 1173-1181.