Eureka! Institutional Repository

Climate change has led to a decrease in the volume of rainfall in our country in recent decades and has created many problems, which are linked to reduced rainfall and magnified by ever greater water demand. We have increasing demand for water for agricultural use to cover the lack of water in crops due to reduced precipitation, but also due to the need to increase irrigated areas. We also have increasing demand for water for industrial use due to the growth of the economy. Finally, we have increasing demand for water for domestic use, due to an increase in the standard of living of citizens. For these reasons the precious natural resource, water, is located or threatened to be in shortage and therefore it is necessary to limit its waste, to stop its degradation with any pollution or contamination and to be reused after someone cleaning or without it, where possible. Thus, in the T.O.E/V. of Agios Athanasios Thessalonikis in recent years they have been trying to deal with the lack of irrigation water by reusing the waters of the drainage trench network that had hitherto been driven to the sea. Already the waters of some draining ditches, the drainage network, are recycled and used for irrigation. For the waters recycled for irrigation purposes, we need to know their quality characteristics through some chemical and microbiological analyses, but also their suitability, through some criteria, for irrigation of the crops that we Interest. In this work, the needs of water per acre and per crop that exists in the plain that is irrigated by the network of the T.O.E/V. of Agios Athanasios Thessaloniki s.a. are calculated with the help of the computational program Cropwat 8.0. These are compared to the recorded similar needs measured by employees of the T.O.E/V. of Agios Athanasios Thessalonikis. It was also considered to reuse the drainage water of drainage moat 1T (dirty canalo). To this end, twelve samples were taken from the waters of this moat throughout the irrigation period of 2017, approximately 10 days, in which a chemical analysis was carried out in the laboratories of the Institute of Land Improvements in Sindos, Thessaloniki, as well as two samples for microbiological analysis. Finally, for the calculation of the average supply of the draining ditch, two measurements of its supply were made