Estimation of Carrying Capacity with Emphasis on Water Resources Using Load and Load Carrier Method (Case Study: Tehran Province)

Today, with the rapid growth of the economy and the development of urban communities, we are witnessing an intensification of the conflict between the resources used by humans. Therefore, awareness of the capacity of available resources in order to achieve the goals of planning is an undeniable necessity. On the other hand, the increasing trend of pollutant production is a major challenge in the planning process. Therefore, in this study, in addition to examining the resources available at the urban level, human-produced pollutants are also considered. Among these, water resources and the pressure applied to water resources are considered as a key factor. This helps to form strategies for achieving sustainable development. This helps to form strategies for achieving sustainable development. In this research, we try to describe the range of Urban environment carrying capacity Condition the province based on resources as a basis for construction and management of residential areas, which means sustainable housing. In fact, assessing the carrying  capacity of urban environment resources leads to awareness of sustainability and increases the link between human activities and urban sustainability. Due to the high importance of resources in the issue of sustainability and the existing and increasing problems of Tehran province, in this study we have tried to estimate the carrying capacity of the province with emphasis on water resources of the province. In this study, the criteria are divided into two groups of carrier and load. Carriers have been studied from three dimensions of water facilities, water supply and environmental and the load caused by human activity in the sectors of water consumption and production wastewater, socio-economic and pollution in the two sectors of waste and air. Shannon entropy method has been used to weight the indices. Finally, using the interaction of loads to carriers, the carrying  capacity of Tehran province was estimated. According to the obtained results and with the available reports related to the existing conditions in Tehran province, it was determined that among the indicators related to water supply carrier, which has been considered as a key factor in this study, The groundwater resources index, the value of which is determined by the weight of 0.0086, is the most important. According to the results of the carrying capacity related to the interaction of loads with carriers, respectively, carriers of water resources with the amount of 23.748 the highest available capacity, then carriers of the environment of 6.5663 and finally carriers of water facilities as the lowest capacity of Tehran province. There are three carriers with a value of 3.7092.Finally, the numerical value of the total carrying capacity of Tehran province based on the specified indicators is 34.0235. In future studies, if the data and information related to other provinces are completed by implementing the method used in this study for other provinces, it will be possible to compare the values of carrying capacity at the national level, The results can help to improve the planning process based on comparisons between provinces.