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Development and application of an effective conceptual framework for the analysis of water resources based on the DPSIR technique (Case study: Bagh Faiz neighborhood of Tehran)

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Abstract

Nowadays, providing safe water is one of the most important issues in big cities. Due to its location in the arid and semi-arid region, Tehran suffers from a lot of water stress despite the fact that it benefits from water resources such as canals and canals. Bagh Faiz neighborhood of Tehran is also one of the neighborhoods that has faced unfavorable ecological damages due to encroachment on water resources. Using the descriptive-analytical method, this research develops an effective conceptual framework to analyze and investigate water resources, specifically the status of water resources in the Bagh Faiz neighborhood, based on the DPSIR technique. The findings show that population growth, the increase in industrial complexes, and the lack of institutional support have been the driving forces for increasing water consumption, reducing underground water resources, adverse land use changes, environmental pollution, and the loss of vegetation in Bagh Faiz neighborhood; These have caused a shortage of water reservoirs, an increase in impervious surfaces, a decrease in the quantity and quality of underground water reserves, which has adverse effects such as land subsidence, increased risk of destruction due to floods and earthquakes, the destruction of plant and animal species, and endangering public health and safety. Therefore, the DPSIR technique by analyzing the cause-effect relationship based on driving force, pressure, situation, effect, and response, tries to provide appropriate answers in the field of existing environmental problems to the policymakers and provides the ability to communicate between scientific findings and real-world issues.

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The Hunjiang River, a vital water system in northeastern China, has suffered severe ecological damage due to overexploitation. This study analyzes the basin’s environmental conditions from 2016 to 2020, identifies key restoration factors, and examines practical restoration projects. Investigating five major pollutants (permanganate index, chemical oxygen demand (COD), biochemical oxygen demand, ammonia nitrogen, total phosphorus) in eight sections, the study finds the Xicun section most polluted, mainly from Baishan City’s industrial and domestic discharges. The ammonia nitrogen concentration at the Zian section also shows deterioration. Using a DPSIR (Driving forces, Pressures, State, Impacts, Responses) framework, the study elucidates the relationship between environmental and socio-economic issues. Results indicate that population changes, industrial development, and water resource management have complex ecological impacts. Evaluating the urban water resource carrying capacity with the entropy weight method and correlation coefficient weighting method, the study finds that increasing forest coverage, improving wastewater treatment efficiency, and reducing COD emissions are crucial. Quantitative assessment of integrated protection and restoration projects involving mountains, rivers, forests, farmlands, lakes, and grasslands demonstrates their positive impact. This research reveals the interplay between the ecological environment and social factors, proposes practical restoration measures, and clarifies project effects, providing reliable decision-making schemes for policymakers.
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