scholarly journals SINKHOLE SUSCEPTIBILITY HAZARD ZONES USING GIS AND ANALYTICAL HIERARCHICAL PROCESS (AHP): A CASE STUDY OF KUALA LUMPUR AND AMPANG JAYA

2017 ◽  
Vol XLII-4/W5 ◽  
pp. 145-151 ◽  
Author(s):  
M. A. H. M. Rosdi ◽  
A. N. Othman ◽  
M. A. M. Zubir ◽  
Z. A. Latif ◽  
Z. M. Yusoff
Keyword(s):  
Groundwater Level ◽  
Pairwise Comparison ◽  
Capital City ◽  
Kuala Lumpur ◽  
Analytical Hierarchical Process ◽  
Pairwise Comparison Matrix ◽  
High Hazard ◽  
Very High ◽  
Sinkhole Hazard

Sinkhole is not classified as new phenomenon in this country, especially surround Klang Valley. Since 1968, the increasing numbers of sinkhole incident have been reported in Kuala Lumpur and the vicinity areas. As the results, it poses a serious threat for human lives, assets and structure especially in the capital city of Malaysia. Therefore, a Sinkhole Hazard Model (SHM) was generated with integration of GIS framework by applying Analytical Hierarchical Process (AHP) technique in order to produced sinkhole susceptibility hazard map for the particular area. Five consecutive parameters for main criteria each categorized by five sub classes were selected for this research which is Lithology (LT), Groundwater Level Decline (WLD), Soil Type (ST), Land Use (LU) and Proximity to Groundwater Wells (PG). A set of relative weights were assigned to each inducing factor and computed through pairwise comparison matrix derived from expert judgment. Lithology and Groundwater Level Decline has been identified gives the highest impact to the sinkhole development. A sinkhole susceptibility hazard zones was classified into five prone areas namely very low, low, moderate, high and very high hazard. The results obtained were validated with thirty three (33) previous sinkhole inventory data. This evaluation shows that the model indicates 64 % and 21 % of the sinkhole events fall within high and very high hazard zones respectively. Based on this outcome, it clearly represents that AHP approach is useful to predict natural disaster such as sinkhole hazard.

scholarly journals Strategic sourcing: Developing a progressive framework for make-or-buy decisions

2020 ◽  
Vol 13 (1) ◽  
pp. 133
Author(s):  
Rubén Medina-Serrano ◽  
Reyes González-Ramírez ◽  
Jose Gasco-Gasco ◽  
Juan Llopis-Taverner
Keyword(s):  
Supply Chain ◽  
Literature Review ◽  
Graphical Representation ◽  
Qualitative Interviews ◽  
Pairwise Comparison ◽  
Decision Matrix ◽  
Pairwise Comparison Matrix ◽  
Chain Management ◽  
Strategic Sourcing

Purpose: Make-or-buy decisions represent a critical dilemma faced by many firms. The appropriate decision between designing and manufacturing parts or services in-house, buying them from external providers or combining both is a fundamental firm process. This paper seeks to address this question by updating the traditional make-or-buy literature with new academic insights, developing a make-or-buy framework with a tool for its operationalisation to help managers evaluate sourcing decisions.Design/methodology/approach:  First, a literature review of the principal theories and approaches about make-or-buy decisions is discussed. Second, the development of the make-or-buy framework is described and explained based on the results of qualitative interviews with practitioners and a set of interviews of an in-firm case study. Third, the results and the implementation of the framework are outlined.Findings: Our study not only validates the proposed framework through a set of in-firm make-or-buy decisions, but also provides a structure for its implementation and design a decision matrix with a pairwise comparison tool for helping practitioners to put the framework into practice.Research limitations/implications: This paper aims to contribute to the study of the make-or-buy literature in supply chain management through the graphical representation of why and how make-or-buy decisions are made. Interestingly, the paper presents relevant dimensions and factors to be studied and evaluates possible outcomes when approaching make-or-buy decisions.Originality/value: Our results suggest that practitioners should combine this framework with a pairwise comparison matrix and a multi-criteria decision analysis based on the TOPSIS methodology to assess strategic sourcing decisions.

scholarly journals MULTICRITERIA DECISION ANALYSIS FOR PRIORITIZING AREAS FOR FOREST RESTORATION

CERNE ◽  
2017 ◽  
Vol 23 (1) ◽  
pp. 53-60 ◽  
Author(s):  
Roberta Averna Valente ◽  
Felipe Coelho de Souza Petean ◽  
Carlos Alberto Vettorazzi
Keyword(s):  
Forest Restoration ◽  
Pairwise Comparison ◽  
Forest Patches ◽  
Pairwise Comparison Matrix ◽  
Priority Areas ◽  
Priority Map ◽  
Definition Of ◽  
Criteria Importance ◽  
Structure And Functions ◽  
Very High

ABSTRACT Urbanization process transforms original landscapes into an anthropic mosaic, causing impacts on hydrologic cycles and on landscape structure and functions. Aiming at the maintenance of the water resources and biodiversity, in an urbanized watershed, the objective of this study was the definition of priority areas for forest restoration. We used a Multicriteria Evaluation (MCE) method, following the steps: criteria definition, identification of the criteria importance, and criteria aggregation through Weighted Linear Combination (WLC). According to the experts, consulted in the context of the Participatory Technique, only two criteria represented the studied landscape: proximity to drainage network and proximity to forest patches. The first criterion was considered twice more important than the second, and through the pairwise comparison matrix, it was obtained respectively the criterion weights of 0.83 and 0.17. The priority map was obtained through the criteria aggregation, using WLC, that considered the criterion weights. The result was a priority map, indicating 5.06% of the study area with very-high priority for forest restoration; 5.22% with high priority; 5.76% with medium priority; 5,42% with low and; 78.53% with very-low priority. We can say that the framework predefined for the study proposed a scenario for priority areas that allowed driving the actions in order to obtain a landscape restoration, beginning through a forest corridor in the riparian zone. Thus, we concluded that the definition of priority areas for forest restoration is possible in an urbanized landscape, using the traditional WLC Multicriteria method.

scholarly journals GIS-Based Spatial and Multi-Criteria Assessment of Riverine Flood Potential: A Case Study of the Nitra River Basin, Slovakia

2021 ◽  
Vol 10 (9) ◽  
pp. 578
Author(s):  
Matej Vojtek ◽  
Jana Vojteková ◽  
Quoc Bao Pham
Keyword(s):  
River Basin ◽  
Flood Events ◽  
Parameter Sensitivity Analysis ◽  
Analytical Hierarchical Process ◽  
Conditioning Factors ◽  
Multi Criteria Evaluation ◽  
Very High ◽  
Different Levels ◽  
The Eu

The aim of this study was to identify the areas with different levels of riverine flood potential (RFP) in the Nitra river basin, Slovakia, using multi-criteria evaluation (MCE)-analytical hierarchical process (AHP), geographic information systems (GIS), and seven flood conditioning factors. The RFP in the Nitra river basin had not yet been assessed through MCE-AHP. Therefore, the methodology used can be useful, especially in terms of the preliminary flood risk assessment required by the EU Floods Directive. The results showed that classification techniques of natural breaks (Jenks), equal interval, quantile, and geometric interval classified 32.03%, 29.90%, 41.84%, and 53.52% of the basin, respectively, into high and very high RFP while 87.38%, 87.38%, 96.21%, and 98.73% of flood validation events, respectively, corresponded to high and very high RFP. A single-parameter sensitivity analysis of factor weights was performed in order to derive the effective weights, which were used to calculate the revised riverine flood potential (RRFP). In general, the differences between the RFP and RRFP can be interpreted as an underestimation of the share of high and very high RFP as well as the share of flood events in these classes within the RFP assessment. Therefore, the RRFP is recommended for the assessment of riverine flood potential in the Nitra river basin.

scholarly journals An Integrated Multi Criteria Decision Making Model for Evaluating Park-and-Ride Facility Location Issue: A Case Study for Cuenca City in Ecuador

2021 ◽  
Vol 13 (13) ◽  
pp. 7461
Author(s):  
Jairo Ortega ◽  
Sarbast Moslem ◽  
Juan Palaguachi ◽  
Martin Ortega ◽  
Tiziana Campisi ◽  
...  
Keyword(s):  
Decision Making ◽  
Facility Location ◽  
Pairwise Comparison ◽  
Central Business District ◽  
Facility Location Problem ◽  
Location Factors ◽  
Pairwise Comparison Matrix ◽  
Park And Ride ◽  
Business District

A park-and-ride (P&R) system is a set of facilities where private vehicle users can transfer to public transport to continue their journey. The main advantage of the system is decreasing the congestion in the central business district. This paper aims to analyze the most significant factors related to a Park-and-Ride facility location by adopting a combined model of Analytic Hierarchy Process (AHP) and Best Worst Method (BWM). The integrated model is applicable for complex problems, which can be structured as a hierarchy with at least one 5 × 5 pairwise comparison matrix (PCM) (or bigger). Applying AHP for at least 5 × 5 PCM may generate inconsistent matrices, which may cause a loss of reliable information. As a solution for this gap, we conducted BWM, which generates more consistent comparisons compared to the AHP approach. Moreover, the model requires fewer comparisons compared to the classic AHP approach. That is the main reason of adopting the AHP-BWM model to evaluate Park-and-Ride facility location factors for a designed two-level hierarchical structure. As a case study, a real-world complex decision-making process was selected to evaluate the Park-and-Ride facility location problem in Cuenca city, Ecuador. The result shows that the application of multi-criteria methods becomes a planning tool for experts when designing a P&R system.

scholarly journals Mapping Mexican COVID-19 vulnerability at municipal scale

2020 ◽  
Author(s):  
Rainer Ressl ◽  
Carmen Luz Martínez ◽  
Miriam Elizabeth Piña Camacho ◽  
Florian Hruby ◽  
José Manuel Dávila Rosas ◽  
...  
Keyword(s):  
One Health ◽  
Pairwise Comparison ◽  
Vulnerability Index ◽  
Related Variable ◽  
Pairwise Comparison Matrix ◽  
Digital Atlas ◽  
Population Vulnerability ◽  
Interactive Map ◽  
Municipal Level ◽  
Very High

This paper presents an interactive map related to the population vulnerability concerning COVID-19 at the municipal level for Mexico. A vulnerability index was modeled using seven socioeconomic/sociodemographic variables and one health-care related variable, all with relevance to a health contingency such as COVID-19. The resulting indicator expresses the municipal vulnerability to face a sanitary crisis such as COVID-19 in five categories. Data for each of the eight variables were first categorized in quintiles. A pairwise comparison matrix was used to weight these variables in relation to their estimated relevance for the municipal vulnerability. With respect to COVID-19 vulnerability, Mexican municipalities show the following results: 1.6% (very low), 18.7% (low), 46.6% (medium), 24.6% (high), 8.5% (very high). The map forms part of a dashboard providing daily information on the development of the pandemic in Mexico, and is complemented by a digital atlas visualizing information for each variable of the indicator.

The World Class City, the homeless and soup kitchens in Kuala Lumpur

2017 ◽  
Vol 65 (4) ◽  
pp. 571-586 ◽  
Author(s):  
Seng-Guan Yeoh
Keyword(s):  
Capital City ◽  
City Centre ◽  
Kuala Lumpur ◽  
Henri Lefebvre ◽  
The World ◽  
World Class ◽  
Spatio Temporal ◽  
The City

Since the early 1990s, Kuala Lumpur, the capital city of Malaysia, has been entangled in the modality of World Class City building. Following key insights by critical scholars like Henri Lefebvre and Doreen Massey, in this article the author shows how spatio-temporal processes have historically produced variegated and contested relational spaces in the city centre. In particular, through the case-study of the recent spatial cleansing of the homeless and soup kitchens in downtown Kuala Lumpur, the author argues for not only critically appreciating the durability and mutability of hegemonic relational spaces but also their potential for irruption because of the ethical dynamic of ‘thrown-togetherness’ that these spaces churn up.

scholarly journals Landfill Site Selection Using GIS and (AHP): Case Study of Ranya City

2021 ◽  
Vol 10 (4) ◽  
pp. 39-49
Author(s):  
Sarkar Hamad Khdir ◽  
Kameran Taheer Saeed
Keyword(s):  
Site Selection ◽  
Pairwise Comparison ◽  
Residential Areas ◽  
Landfill Site Selection ◽  
Pairwise Comparison Matrix ◽  
North West ◽  
Suitability Index ◽  
Environmental Requirements ◽  
Hierarchy Process

Ranya City is located in North West of Sulaymaniyah Governorate, Iraq. It has an area of (76.7) km2. In 2018, it was home for (102,571) inhabitants. Presently, there are no landfills in the study area that fulfills necessary environmental requirements; thus, informal and unsuitable solid waste dumping is negatively impacting human health and the environment. Land fill site selection can be a difficult task as it is impacted by different factors and regulations. This study is an attempt to identify and evaluate suitable landfill locations in the study area using Analytical Hierarchy Process (AHP) and Geographic Information System (GIS). Ten criteria are used in this process which includes: groundwater depth, surface water, residential areas, Geological formations, slope, elevation, soil type, land use, roads and archeological sites. AHP was used to determine the weight for each criteria using pairwise comparison matrix. Three classes of suitability index were found: unsuitable (98.47%), moderately suitable (0.003%) and suitable (1.52%) of the study area. Three suitable landfill sites were identified as candidate sites that meet the requirements with an area of (0.29) km2, (0.12) km2 and (0.098) km2 respectively.

A Case Study of Malaysian Pedestrian Walking Speed at Shopping Malls in Kuala Lumpur, Malaysia using Human Behaviour Simulator (HBS)

2019 ◽  
Vol 11 (4) ◽  
Author(s):  
Mohd Firdaus Mohamad Ali ◽  
◽  
Muhammad Salleh Abustan ◽  
Siti Hidayah Abu Talib ◽  
◽  
...  
Keyword(s):  
Walking Speed ◽  
Human Behaviour ◽  
Shopping Malls ◽  
Kuala Lumpur

An Analytical Approach to Cruise Tourism As an Option For Development: a Case Study of the Sultanate of Oman

2020 ◽  
Vol 15 (2) ◽  
pp. 95-109
Author(s):  
Heba Aziz ◽  
Osman El-Said ◽  
Marike Bontenbal
Keyword(s):  
Capital City ◽  
Sultanate Of Oman ◽  
Policy Makers ◽  
Cruise Tourism ◽  
The Impact ◽  
The Relationship ◽  
Average Expenditure ◽  
Return Intention

The objective of this study was to measure the level of cruise tourists' satisfaction as well as the relationship between satisfaction, recommendation, return intention, and expenditure. Also, the impact of factors such as nationality, length of the visit, and age on the level of expenditure was measured. An empirical approach for data collection was followed and a total of 152 questionnaires were collected from cruise tourists visiting the capital city of Oman, Muscat, as cruise liners anchor at Sultan Qaboos Port. Results of the regression analysis supported the existence of a causal relationship between satisfaction with destination attributes, overall satisfaction, recommendation, return intention, and expenditure. It was found that the average expenditure varies according to age and length of the visit. Recommendations for policy makers were suggested on how to increase the role of cruise tourism in strengthening the economy.

RECYCLED WATER RISK PERCEPTION - A COMPARISON OF TWO CASE STUDIES

2007 ◽  
Vol 2 (4) ◽  
Author(s):  
A. Hurlimann
Keyword(s):  
Risk Perception ◽  
Case Studies ◽  
Perceived Risk ◽  
Capital City ◽  
Recycled Water ◽  
Urban Centre ◽  
On Line ◽  
Line Survey ◽  
Water Uses

This paper reports results from a study comparing perceived risk associated with various recycled water uses in two Australian locations, both in the state of Victoria: the capital city Melbourne, and Bendigo a regional urban centre. Both locations are experiencing ‘drought’, but Bendigo is experiencing this in a more acute manner. A case study is used in each location. Both case studies involve future use of recycled water in new commercial buildings. An on-line survey was used to measure attitudes to recycled water of the future occupants of both buildings. The study found perceived risk associated with 11 uses of recycled water increased as the use became increasingly personal. Interestingly, no difference in perceived risk associated with 11 uses of recycled water was found between locations. Prior experience (use) of recycled water was found to be a significant and positive factor in reducing risk perception. Various attitudinal variables were found to be significant influences on perceived risk. Results indicate that reducing perceived risk of recycled water use may increase satisfaction with its use.

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