In the last few years the notable increase in population and their environmental illiteracy has destroyed the worlds natural ecosystem; destruction is affecting all professions and sciences. The problem is global as well as local; Egypt and Ethiopia move closer to war over Nile river waters, also a lot of habitat disappears due to water pollution and the urbanization of coastal cities (such as Alexandria which struggles with storm water every winter because of ageing infrastructure) (Abdl Mawla, 2012). The problem calls for a more strategic and comprehensive approach to land conservation and the consideration of green infrastructure approach as a solution for the development of threatened regions.  Green infrastructure is an approach that maintains healthy waters, multiple environmental benefits and support sustainable communities (EPA,2012). Green infrastructure encompasses guidelines for water, energy, habitat, community and air values protection and restoration. This paper focuses on hydrological infrastructure as means for maximizing both the quality and quantity of storm water in coastal cities, case study Alexandria (Egypt). The paper methodology is to refer to case studies, publications, papers and books. It is expected that implementing a green infrastructure strategies in Alexandria will increase the water security and high quality of water, reduce the sewer overflow and support the natural habitats.