Assessing the chromatic contrast in open surface excavations: a comparative study between subjective and quantitative approaches

Menegaki, Maria; Koutiva, Ifigeneia; Kaliampakos, Dimitris

doi:10.1080/17480930.2013.866791

Cited by 12 publications

(11 citation statements)

References 21 publications

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“…The first step aims to define the characteristics of the quarry. Recent studies (Menegaki et al, 2015), have underlined the fact that observers tend to take particular notice of the chromatic contrast between the excavated area and the colour around the edge of the site and this aspect of alteration tends to vary according to the characteristics of the material being quarried. Hence, one of the first parameters to be quantified is the extent of the Exposed Quarried Area (EQA) which varies considerably according to the position of the receptor (i.e., the viewpoint) and the choice of the exploitation method.…”

Section: Methodsmentioning

confidence: 99%

Application of a Multi Stage Method to Assess the Landscape Alteration Induced by Quarrying Sites: A Comparative Analysis

Lippiello¹,

Degan²,

Agostini³

et al. 2016

American Journal of Environmental Sciences

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The aim of this study is to provide a design tool to forecast the effects that extraction methods and reclamation plans will generate on the land surrounding quarry sites. The method is based on a graphical approach and it consists of three consecutive phases. The first phase focuses on the quarry plant and aims to quantify the extent of the quarry area exposed to a potential observer. Various possible exploitation methods are compared by plotting several layouts which are compatible with the characteristics of the mineral deposit. The extent of the resulting quarried area is then assessed for each layout. The second phase allows the selected solutions to be compared and analysed in relation to the topographic characteristics of the surroundings. Through the adoption of a parameter which quantifies the zone of visual influence of the quarry, the visual impact each exploitation method would have on the surrounding landscape throughout the lifetime of the quarry may be assessed quantitatively. The final phase combines the findings of the previous phases, thus taking into account both the extent of exposed quarried area and the features of the surrounding landscape so as to define input data in order to select and design the least intrusive layout. The procedure is tested on two case studies and, after comparing the two sets of results, some general principles are proposed and discussed which may be applied in relation to activities of both quarrying and reclamation.

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Section: Methodsmentioning

confidence: 99%

Application of a Multi Stage Method to Assess the Landscape Alteration Induced by Quarrying Sites: A Comparative Analysis

Lippiello¹,

Degan²,

Agostini³

et al. 2016

American Journal of Environmental Sciences

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“…Therefore one or more comparison surfaces need to be selected in order to quantify the degree of chromatic contrast (Dentoni et al 2004). Recent studies confirmed that people tend to compare the exposed excavation with the adjacent area, instead that with the sky or with more distant areas (Menegaki et al 2014).…”

Section: The LVI Indicatormentioning

confidence: 99%

Assessment of visual impact due to surface mining with the Lvi method

Dentoni¹,

Grosso²,

Massacci³

2014

Legislation, Technology and Practice of Mine Land Reclamation

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“…Indirect methods are based on the quantification of a number of measurable variables that characterize the landscape modification (Pinzari and Re 1990;Pinto et al 2002;Misthos and Menegaki 2016). With specific reference to the visual impact produced by surface excavation, Menegaki et al (2014) performed a comparative analysis between direct and indirect methods. The current trend is the use of psychophysical criteria, where the two approaches are integrated.…”

Section: Introductionmentioning

confidence: 99%

Visual impact evaluation of mines and quarries: the updated Lvi method

et al. 2020

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The article deals with the evaluation of the visual impact arising from quarrying, mining and civil engineering works that involve extensive surface excavation. An indirect method has been formerly proposed to quantify the level of visual impact (Lvi) based on the two physical variables that define the magnitude of change in a natural landscape: the solid angle subtended by the visible alteration from a given viewpoint (Ω v) and the chromatic contrast between the alteration and the surrounding landscape (ΔE μ). These two objective variables are determined by elaborating the digital images of the landscape under investigation, taken from the most representative viewpoints. The Lvi indicator has proven to be highly correlated with the judgement values expressed by potential observers and thus may represent a valuable operative tool in the environmental impact assessment (EIA) procedures, both for the proponent of new projects and for the governmental authorities in charge of decision-making. This article describes a further development of the Lvi method, which aims at improving the repeatability of the impact evaluation by eliminating some critical issues related to the definition of both the excavation limits and the natural comparison surfaces representing the natural landscape. To that end, the original calculation code has been implemented with two image segmentation algorithms, which objectively designate the areas within the picture to be used for the automatic calculation of the impact level Lvi. The updated code has been validated against the original Lvi method, thus confirming the suitability of the revised methodology to represent the perception of potential observers.

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Assessing the chromatic contrast in open surface excavations: a comparative study between subjective and quantitative approaches

Cited by 12 publications

References 21 publications

Application of a Multi Stage Method to Assess the Landscape Alteration Induced by Quarrying Sites: A Comparative Analysis

Application of a Multi Stage Method to Assess the Landscape Alteration Induced by Quarrying Sites: A Comparative Analysis

Assessment of visual impact due to surface mining with the Lvi method

Visual impact evaluation of mines and quarries: the updated Lvi method

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