The main purpose of this study was modeling the suitability of recreational services in order to identify the high-priority areas for the development of recreational activities. To identify the spatial patterns of recreational services, the landscape attractiveness index, visit rate estimation, and access distribution were combined using a set of sub-indices. Moreover, the weight of each index was calculated using CRITIC weighting method and the importance of each index in the formation of recreational services spatial suitability was determined. The results showed that the presentation of highly recreational services is mainly done in the areas with forest ecosystems, protected areas, and aquatic ecosystems such as rivers and wetlands that have diverse landscapes. On the contrary, urban and human-built areas have the least potential for the provision of recreational services. Getis-Ord Gi* statistic was used to model the recreational suitability, identify recreational suitability clusters, and zoning. With its very low suitability, Zone 1 covers 19.9 percent of the area under study. This zone is mainly filled with agricultural lands (54.7%), grasslands (36.1%), and urban lands (6.8%). In contrast, with its very high recreational suitability, Zone 5 covers 16.5 percent of the area under study. The main uses of the lands in this zone are forest lands (55.5%) and aquatic layers including rivers and wetlands (17.2%).  Zone 3, which has an average suitability rate, covers more than half of the area under study. The approach presented in this study helps identify the development priorities in the light of the recreational potentials of the ecosystems existing in an area. Thus, it can be used to improve the spatial planning of recreation and tourism in order to preserve ecosystem services and sustainable use of them.

Hospitals are among the most important service centers, and the selection of the optimal site for them is a very important (yet complex) undertaking, as it can bring about optimal spatial distribution of hospitals and can make them optimally accessible for citizens. In the present study, in order to optimally locate hospitals in District 5 of Tehran metropolis, a combination of the geographical information system, objective weighting methods, and multi-criteria decision making method was used. The geographical information system was used to analyze and manage the optimal hospital locating criteria, the CRITIC weighting method was implemented to account for the correlation between the criteria, and Shannon's entropy method was used to model the existing uncertainty in the criteria. CODAS multi-criteria decision making method was used due to its novelty and the evaluation of alternatives based on two criteria. Based on the results obtained from CRITIC weighting method, distance from health centers, and based on the results of Shannon's entropy method, distance from industrial areas were the most important optimal hospital locating criteria. The results of ranking the candidate sites using CRITIC-CODAS and Shannon’s entropy-CODAS were almost the same, and both methods identified the sites on the western side of the District (that did not have any hospital) as the appropriate sites. The results of the study indicated the high accuracy of combined objective weighting and multi-criteria decision making methods in optimal locating of the hospitals. It might be asserted that these methods can replace thematic weighting methods such as analytical hierarchy process.

Sustainable development has gradually and over time brought about various approaches with different goals. Ecological city is one of these approaches that has a stronger emphasis on environment issue as well as the relationships between city development and nature. The purpose of this study was to determine the local factors effective on the achievement of ecological city in order to sustainably develop Darcheh city. This study was mixed-methods (qualitative-quantitative) in terms of paradigm, and descriptive-analytical and exploratory in terms of nature. Data was collected using document analysis and field study through two means: interviews with experts using the Delphi method and a questionnaire. In the qualitative phase (the Delphi method), 30 experts and specialists were interviewed. In the quantitative phase, the statistical population of the study was comprised of Darcheh citizens aging over 15, who were 37367 individuals in the year 2016. From among these, 375 participants were selected using cluster sampling. The face validity of the questionnaire was confirmed by the urban planning experts, and its reliability was corroborated through Chronbach’s alpha coefficient. The results of the study in both phases (qualitative and quantitative) showed that the environmental and economic dimensions – with the average scores of 4.23 and 4.11 and (beta) regression coefficients of .345 and .349 – best describe the achievement of ecological city, there is a relative homogeneity among various neighborhoods of the city in terms of ecological city indices, and the ecological city development can be attained through a clear model. Moreover, according to Pearson correlation coefficient, the citizens who have had a higher educational level have shown a higher tendency (.585) to help implement the ecological city project.

The risk of earthquake always influences the human communities and inflicts irreparable damages to them. Therefore, preparation against this crisis through the identification and elimination of vulnerable parts is effective in reducing the damages of earthquakes. As Iran is located on one of the two major seismic belts of the world and has many faults, the occurrence of earthquake in the Iranian plateau is natural. Iran is among the top ten countries with the highest rates of earthquakes. Urmia city, which is located on the skirts of Zagros mountain range, is not an exception in this regard, and every year many earthquakes with different intensities occur in this city. Therefore, in order to confront the foregoing issue, we need precise studies regarding construction and safety. In this study, to evaluate the rate of vulnerability to earthquakes, the effective parameters were identified and then were weighted using fuzzy hierarchical analysis. The vulnerability map was prepared using index and fuzzy logic overlay method for Urmia statistical blocks and was presented in the spatial information system environment. The obtained results indicated the vulnerability of nearly 50 percent of the city area to earthquake (i.e., 151574 m2), with .005 percent having a very high vulnerability grade and .40 percent (i.e., 11538359 m2) a high vulnerability grade to earthquake.

The disasters of recent years indicate that communities and individuals are getting increasingly vulnerable and risks are progressively growing. Nonetheless, the need to reduce risks and vulnerabilities are often ignored up until the occurrence of disasters. In the study at hand, which was done based on the descriptive-analytical method, it was tried to examine and predict the vulnerability perspective of the areas located within District six of Ahvaz metropolis during a potential earthquake based on the main purpose of this study. The theoretical data of the study was collected through library research method. After the extraction of the related indices, the spatial analysis of each index was carried out through fuzzy Delphi method, IHWP vulnerability model, and GIS software analyses. The analysis of the findings illustrated that considering the first and second priorities of the crises management, 15.03 percent of all areas of the district under study are highly vulnerable to earthquake. That is to say, in case of a strong earthquake in the district, they will be vulnerable. The study concluded that the physical qualities of the building are as important as the factors such as land use, population density, and time of earthquake occurrence. These have all effective roles in the vulnerability rate and the rescue activities.

The purpose of this study was examining the course of development of Qazvin urban area in order to optimize the decisions of related authorities to enhance sustainable spatial efficiency and exploitation. Through a meta-analysis, four urban area perspectives were extracted, including natural-cultural, administrative-political, functional, and communicative. This was then followed by a theoretical conclusion. GIS spatial statistics were used for the analysis purposes. The results indicated the presence of only the physical and political perspective. The administrative-political perspective of urban area (as the only formal area) and functional urban area (only in an informal manner) were identified as the urban perspectives of Qazvin. The investigation of the natural-cultural perspective of Qazvin urban area led to the identification of southern Alborz area, which based on water resources approximately conforms to the political borders of Qazvin province. Due to its use as a crossroads, this area does not have cultural coherence, and its closeness to the political capital of Iran has made its environmental conditions critical and has changed the role of this area. To solve these problems, it is suggested that first an ecological planning is done as the basis of spatial planning and development decisions. Moreover, due to the cultural inconsistency of Qazvin area, it is suggested to adopt creation of identity through regional governance. Moreover, the economic areas resulting from functionally connected areas should be enhanced and directed in the light of the ecological conditions of the area. Although the application of neo-regionalism viewpoint at transnational level is not possible due to the specific political conditions of Iran, its application in regional and local levels seems to be unavoidable in order to reduce ecologic crisis (water resources) and enhance identity creation in Qazvin urban area.

The vulnerability appraisal is one of the prerequisites of risk analysis in disaster management. Vulnerability to earthquake, especially in urban areas, has increased over years due to the existence of complex urban structures and rapid development. In order to take preemptive measures and reduce the damages of earthquake, the determination of vulnerable areas and implementation of necessary measures seem inevitable. Accordingly, the present study set out to examine the vulnerability of Tehran urban blocks via a location-base model. To attain this objective, first the criteria effective on the evaluation of earthquake vulnerability were divided into three groups, namely exposure, sensitivity, and adaptation capability (16 location criteria in general). Using the expert opinions and network analysis model, the importance of each of the criteria was determined. Fuzzy functions and ordered weighted averaging method were used to normalize the criteria map and develop vulnerability maps under various scenarios. Finally, the sensitivity analysis of the criteria was carried out. The results showed that vulnerable population density and average slope were the criteria with the most and least importance, respectively. The vulnerability maps demonstrated that the areas to the north of the area under study are in the vulnerable class under all scenarios. The stability and dependability of the output results were assessed using sensitivity analysis. The results indicated that changing the weight of the criteria does not have a significant effect on the model outputs, a finding that clearly proves the stability of the model.

As the distinguishing boundaries between upper and lower levels, regional plans and programs have an effective role in bringing about coordination between planning levels and improving their effectiveness and functioning. Due to the importance of planning and the results obtained from regional programs, the study at hand set out to examine plans at national, regional, and provincial levels based on regional approach with an emphasis on Gilan province plans. In this study, qualitative research method was used, and to classify the existing knowledge, the required data was divided into research analysis units, namely the plans and programs at the three foregoing levels. These were then analyzed using content analysis and document analysis methods in NVIVO 12 software. After data analysis, 96 open codes were achieved. The homogeneity of the open codes of each of the three levels led us to extract the main axial code titled “region-oriented approach in plans and programs at national, regional, and provincial levels” along with three other secondary axial codes, namely “holism and movement toward abstract and stereotypical concepts and issues,” “regional plans following macro plans,” and “lack of a regional decision making mechanism at the province level.” It is noteworthy that the highest regional approach presence was found at province level with 49 open codes.

Despite having abundant wealth, power, and resources and making great efforts to bring about regional balance, there is a deviation from spatial equality in Iran’s structure, which has led to the establishment of center-periphery structure as the dominant model in Iran. This structure has been created due to many factors, forces, and currents. Therefore, the purpose of this study was to present a theoretical model of spatial inequality in Iran using Lynham’s theorizing method. There were five steps in the application of this method. In the first method, i.e., conceptualization, the theoretical model was developed using meta-synthesis method and MAXQDA software. The obtained model entailed a host of concepts and components. These included  context-based  theory-driven discourse, centralization and making the periphery dependent, the reverse results of development plans, unequal power relations, inequality of benefits and wealth (economic inequality), inappropriate policymaking and management, weak local and regional management as opposed to central power, unbalanced distribution of population and activity in geographical spaces, and unbalanced distribution of natural resources. These concepts, grouped into ideological, economic-political, and contextual discourses, have created spatial inequality and center-periphery relationship in Iran.

In order to explain the ecological-sociological strategy of Tehran land use network/ land cover, the present study was tried to identify the spatial process of the change in the landscape mosaic pattern and its effect on carbon sequestration over the course of 3 decades from 1990 to 2020. In this study, the role of landscape measures in the identification of landscape mosaic spatial pattern changes and its combination with data obtained from ecosystem service modeling was shown. To this end, after examining the process of structural-functional changes in landscape mosaic using decision tree algorithm and InVEST model, the complexity of the relationship between landscape spatial pattern and the quantity of carbon sequestration regulatory services at the two levels of class and landscape was addressed using the measures and data obtained from InVEST model. The findings indicated that the volume of carbon sequestration regulatory services in all periods had reduced due to the effects of the spatial process of “accumulation” in construction strains. Moreover, in the 1990-2020 period, the highest rate of carbon storage loss (291656 tones, 9.58%) occurred due to the effects of the spatial processes of “deletion” in green lands and “fragmentation” in barren lands. In the 2000-2010 and 2010-2020 periods, the volume of carbon storage reduction were 182209 (6.62%) and 159688 (6.22%) tones, respectively. Pertaining to this discussion was the finding that the effect of the change in the index of strain numbers in green and barren lands for all periods was accompanied by increased fineness, which indicates its reverse relationship with carbon sequestration rate. On the other hand, the reduction of other measures in green and barren lands reveals the existence of a direct relationship with the loss of a volume of carbon sequestration in the foregoing period. At the landscape level, the reduction of heterogeneity and simplification of the landscape mosaic spatial pattern led to the reduction of carbon sequestration. From this perspective, it is necessary to prioritize the identification of the spatial processes effective on the landscape structure model in the completion of the processes of the evaluation of the urban development effects on the carbon sequestration service current.