A central issue for the Algerian city, in the dry environment, is awareness of the establishment and preservation of particular green spaces within the framework of sustainability. The overall goal of this study is to concentrate on the issues of green space provision in the city of Boussaada. Boussaada is a complex and fragile city with a rich history, archeological and natural diversity, and is under tremendous anthropogenic stress. The city of Boussaada has long had issues with the availability of green areas, a situation that is attributed, among other things, to a flawed urban design that places a premium on the environment. We attempted to define the quantity of green spaces in the city and quantify their richness through this study. The qualitative and quantitative study was carried out with the help of the normalized difference vegetation index (NDVI) and qualitative analysis and more specifically the species of trees in the new town of Boussaada.
In recent years, much attention has been drawn to the walkability, it is regarded as an important urban capability that needs to be achieved and enhanced, as the urban environment can either permit or hinder the propensity to walk. This paper aims to explain the spatial relations that describe the elements of urban design for a walkable urban environment; we also attempt to measure and specialize in public pedestrian spaces using a qualitative barometer (in the city centre of M?sila that becomes a commercial attraction). This barometer shows how urban design can be used as a way to create functional city centre, it also analyses the conditions under which the city centre offers an adequate and favourable environment for walking. Although the city centre of M?sila provides many positive things like diverse shopping places and a variety of functions other than shopping. However, it requires continuous development to urban design to meet the new social requirements. The pedestrian encounters many obstacles and difficulties in moving and accessing public spaces, especially during peak hours and holidays, which has prompted us to draw particular attention to further analysis of different elements of the layout.
From a sustainable development perspective, becoming aware of the preservation of green spaces and the creation of green infrastructure is a great challenge for the Algerian arid city, especially in the arid environment. Green infrastructure is multifunctional open space networks aimed at sustainable resource management and environmental improvement. We chose the city of Bou-saada as a case study to demonstrate the need for green infrastructure. This city, with a semi-arid climate, presents a very varied, complex and fragile historical, archeological and natural richness subjected to strong anthropogenic pressures. The overall objective of this research is to assess green infrastructure in the city of Bou-saada using a qualitative barometer. This method uses several themes around the concept of multifunctionality and thermal comfort, also using some subthemes to break down the themes. Green infrastructure in the city of Bou-saada can withstand the drought and heat emanating from this area, provide shade and reduce heat, prevent soil degradation and desertification by stabilizing the soil and mitigating wind-induced erosion. Through this research, we have also looked at several issues such as safeguarding the natural heritage, combating desertification, and siltation.
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