seyedeh maryam gilani - Department of urban planning, Faculty of architecture and urban planning, Qazvin branch, Islamic Azad University, Qazvin, Iran
Seyed Mohamadreza Khatibi - Department of urban planning, Faculty of architecture and urban planning, Qazvin branch, Islamic Azad University, Qazvin, Iran
Zohreh Davoudpour - Department of urban planning, Faculty of architecture and urban planning, Qazvin branch, Islamic Azad University, Qazvin, Iran
Maryam Khastou - Department of urban planning, Faculty of architecture and urban planning, Qazvin branch, Islamic Azad University, Qazvin, Iran

As an urban life support system and as a new method in planning,green infrastructure design can be more effective in the function of natural systems of cities through integration in sustainable regeneration processes as well as integrated and coordinated management of organizations involved. Multiple management systems and disharmony of state organizations and institutions in charge of urban regeneration in green infrastructure is one of the main issues in urban management. In this regard, using green infrastructure indicators in regeneration programs, in this research, conducted in Lahijan in ۲۰۱۹,the organizational relationships of staff members, including state institutions of the city were examined. Also,using descriptive-analytical method and library information, as well as ۴۰۰ questionnaires distributed among local residents and ۵۰ interviews with city managers as the staff members, after analysis and implication of the data through Pearson correlation,SPSS and social network analysis in UCINET environment, the connection between urban green infrastructure indicators and sustainable regeneration was determined, and the interactions of institutions involved in regeneration were studied.According to the results of the questionnaires, a significance level of under ۰.۰۱ was found for green infrastructure and sustainable regeneration components; therefore,as a certain level, the relationship between the indicators of green infrastructure and sustainable regeneration was measured ۰.۹۵. In terms of environmental indicators,due to higher correlation coefficients and mean, the impact was higher than the other two indicators.State institutions have a high ability to preserve the urban green heritage by increasing the inter-institutional interactions and awareness.Therefore,in order to realize this approach,it is necessary to raise the awareness of each institution and collaboration among actors to increase the executive power of the staff committee members.Accordingly,the executive power of institutions is based on inter-institutional relations and collaboration and increasing the managers' knowledge about sustainable indicators of regeneration in the rehabilitation of urban green infrastructure of Lahijan.

sustainable urban regeneration, urban green infrastructure, Sustainable Development, inter-organizational interaction