Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Titre : Evaluation of rainwater harvesting with a different approach

Yağmur suyu hasadının farklı bir yaklaşım ile değerlendirilmesi

Auteur : BÖRÜ Songül

Université de soutenance : Dicle Üniversitesi

Grade : Master Thesis 2022

Résumé partiel
From the past to present, one of the most important human needs beings has been water. The rapid increase in the world population brings with it an increase in the water demand. At the same time, increasing in urbanization and industrial activities, which are depends mostly on population, negatively affect the cycle of water on earth. With the global climate change, which is a result of greenhouse gases emitted into the atmosphere and which poses a great danger, leads the occurrence of anomaly hydrological and events (i.e. floods, droughts, forest fires, etc.). The biggest negative effect of this change in climate on a global scale is on water resources. For a solution to the ever-increasing water scarcity/stress problem, new alternative sources (i.e. wastewater re-uses, desalination, rainwater harvesting, etc.) are sought in our country as well as in the rest of the world. On the other hand, there are many published studies in the current literature on such alternative water supply methods. Although rainwater harvesting systems, those history dates back to BC, have begun to lose the necessary interest in time and have become one of the waters that flow without intervention on the earth, today it has started to attract attention again because it is cheaper and easier to obtain than other alternative sources. Especially in arid and water-scarce regions, rainwater harvesting becomes more important and almost a necessity. In ancient times, cisterns of different sizes and geometries and built with different building materials, mostly natural, were replaced by artificial storage volumes. Again, the cistern waters, which were used mostly for drinking and usage purposes, are not used for this purpose today due to health concerns. It is mostly used for irrigation, siphon use, animal husbandry and similar activities. Again, rainwater, which was collected from natural environments in the hydrological cycle, has now begun to be harvested from artificial environments such as roofs, roads, and squares, which have impermeable properties. Thus, water is classified as clean (used for drinking and domestic use), gray (used for siphon, irrigation, etc.), and dirty water (more used for irrigation) are used accordingly. It is seen that the use of harvested water for different purposes also provides benefits in terms of sustainability by reducing the pressure on water resources. A large investigation has been made on the literature and the works conducted on rainwater harvesting, precipitation hydrology, the impact of the collection area of rainwater and the optimum sizing of the tank in case of storage were reviewed.

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