The topic of land and how to use it have always been the main topic of the urban planning and the space-place assessment and organizing of the efficient and urban performances is one of the most important and most effective axis urban Sustainable Development. The aim of the performance of this reseach is the quality and quantity assessment of the urban land use with constant Sustainable Development in Piranshahr. The manner of this research is analytic descriptive. To this purpose, there indicators of capacity compatibility and social justice have been used to achieve the sustainable development. In the first stage, it is paid to the quantitative assessment of existing uses and capacity index analysis, in the second stage it is paid to the qualitative assessment of use in view point of compatibility by using compatibility matrix and analysis of social justice index with the model of the nearest neighbor and swot model. The results of the quality and quantity analysis show that often efficient face with lack. This lack equals with 175.5 hectar. Also the most extent of Inconsistency is in the Usage Industry, Administrative, Residential and educational. This situation is expressive of the lack of the balance and disharmonious between the efficient that was caused by the urban planners lack enough attention. So it is essential to fit the environmental balance and economic and cultural of the urban Sustainable Development in the planning process.

The petrochemical industry makes environmental impact and land suitability assessment is important for the petrochemical industry. The objective of this research is to develop a model to analyze the land suitability and site selection for petrochemical idusrty through a spatial-geographical study and environmental palnning and management approach. To this purpose, the land suitability and site selection were performed using the PROMETHEE II and ELECTERE III methods in combination with GIS. These methods were used to undertake the study objective in three stages. Firstly, a review of the literature led to the formulation of analytic land suitability importance for site selection of petrochemical idusrty. Secondly, the major factors influencing the identification of suitable locations for petrochemical idusrty were identified using experts. The outranking methods were used to determine final zoning map. The final zoning map shows about 16% ( 45.207 Km2) by PROMETHEE II and 10% ( 29.207 Km2) by ELECTERE III is suitable for development of petrochemical industry. Sensitivity analysis shows suitable area is consistent with each of input factors in the model. So, this model is suitable to analyze land suitability and site selection for petrochemical idusrty.

The planning literature has passed the prediction, forecasting and exploration of future concepts and has reached to futurology and foresight. Regional development planning is not exempt from this and needs a futuristic approach in order to be used after being planned. Identifying the future uncertainties and the underlying assumptions in the regional development planning by which the long-term plans have been established, is one of the most important main fields in the identification of problems and facing challenges of development documents. Post-planning also deals with the success or failure evaluation of the developed policy and planning in the future time horizon. Assumption Based Planning (ABP) is one of the post-planning methods, which could be used in preparing stable and compatible programs. This research is a combination of documentary and surveying methods in terms of the research type and is analytical and exploratory based on the new methods of futurology science in terms of the research nature which is conducted by a combination of qualitative and quantitative models. Data collection methods and techniques Delphi questionnaire was used and questionnaires are experts in developing and development issues surrounding region During two separate questionnaires have been completed. In this way, the correlation between each strategy uncertainty with mining experts from both questioners (strategies, inventory uncertainty) is calculated. The results show which areas are considered the most vulnerable strategies. Analysis of the results indicate that utilizing the ABP could be implemented in the regional development planning, which helps planners to have a consensus and commitment to the output. Thus, weaknesses and waivers existing in the long-term regional development planning could be identified and reviewed by utilizing the ABP.