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Today, water resources management is one of the most important concerns of developed and developing countries, as well as policy makers on a national and international scale. Water resources management is vitally important both in terms of maintaining the balance of water reserves and supplying water for various uses, and in terms of water hazards and loss of life and capital. Today, modern technologies and green technology have helped human knowledge and improved the management of water resources. Integrated Water Management (IWM) has different decision-making components on the basis of climate, geology and topography of each region. In our country, due to the incorrect  modeling of water resources management methods of imported waters from different countries, there is not enough versality and appropriateness with the specific conditions of the country with this regard, recently in Iran, similar to the developing countries, water resources management, changed to the management structure of the catchment's basins. Whit regards to the up-to-date structure of the water resources management of the country, it is hopefulness the modern methods will be on the agenda.  Our country, due to facing frequent droughts and climate changes together, with the lack of water resources and on the other hand, is greatly affected by water hazards such as floods. Based to the available statistics and available data, despite the decrease in the amount of rainfall in recent decades, floods are at the top of  the hazards and damaging natural disasters. For example, the events of the flood in Khuzestan and Sistan and Baluchistan in 1398 and the Esfand flood in 1402 in Chabahar and Dashtiari regions in the east of the country, which caused a lot of damage. According to statistics and information, damages caused by floods in some parts of the world, especially in Asia, are in the first place among damages caused by natural disasters. In terms of the time of the event, it is important to point out that earthquakes and droughts occur every few years, but annual floods occur at least in one place in Iran. Therefore, flood management is one of the most important governance duties of the trustee bodies. The amount of flooding in different parts of the country varies from one point to another. But based on available hydrogeological and hydrological information as well as statistical data, the southeast region of the country is one of the most flood-prone parts of the country.

The region of Sistan and Baluchistan has always suffered from water crisis due to repeated droughts and wet-years. In Isfand 1402, the southern part of Balochistan, the coastal and hinterland of the Makran Sea, which has been suffering from drought for four to eight years, has experienced seasonal floods. In the investigation of the factors leading to the increase of flooding in the southeast of the country, two categories of phenomena can be mentioned. The first factor is the climatic conditions of the region, which are accompanied by torrential rains under the influence of southwest Asian monsoon systems, and on the other hand, part of the Mediterranean fronts and the low pressure Sudan system, such as the rains of the Currents year which lead to severe torrential rains and destructive floods, so that the rainfall of March 1402 in the amount of 200 mm in two days was the main cause of destructive floods.

Southern Baluchistan region and a wide area of discharge of Kaju and other rivers, is the path of floods from the mountainous region to the Gulf of Gavatr, which is approximately cover an area about 150×160 km. This zone is a vast plain area whose inhabitants have learned over time how to organize their environment and nature, which is based on an agricultural and livestock economy, in such a way that they suffer the least damage in drought and heavy rains. People over time with the experience they have gained have somehow reached to a local successful water engineering that had received a relatively adequate response until the last few decades. Perhaps the historical experiences of the people in creating "hotaks" to store drinking water for animals and humans and weir (degars) in the most basic form and with the least facilities, and relying solely on human and animal  labor is not understandable for provincial and national authorities in which, how people in South Baluchistan region such as Chahan and Zarabad, with their deep knowledge 

Of nature's behavior, by constructing kilometers of a low height earth dams controlled the floods from the point of entry into the plain and lead them throughout the plain. In fact, they implemented a kind of watershed engineering and in this way, they spread the floods in the whole plain to reduce the power of possible destruction.

However, without attention to the reality of the natural geography of the region and the long-term experience of the local people, with a theoretical mindset and without serious study and knowledge of the natural geography of South Balochistan, the construction of various roads and dam construction projects without respecting the privacy of rivers and bridge constructions with small spans. during heavy and torrential rains, it has led to the creation of widespread surface runoff in the region.

Implementation of any plan in Sistan and Baluchistan province and Makran region requires scientific studies. Implementing any plan without studying and understanding the environmental realities of the area will be fruitless and repeating previous mistakes and wasting funds on the one hand and repeating the disaster imposed on the homeless people on the other hand.

The important fact is that the constructing costly dams to compare with the mountainous areas of the Alborz or Zagros watersheds, the natural geographical structure of Balochistan, it is not suitable for large water storage for two reasons; First, the slope of the land from the entrance of the floods to the plain is very low, with almost the ability of water to stand still and its natural distribution in the plain. This gentle slope continues until entering the Gulf of Gavatr on the Makrani coast, and the water slowly enters the ocean. Therefore, taking into account the geological and climatic conditions of the southeastern region of Iran, specifically Sistan and Baluchistan province, one of the most important measures is water storage in natural reservoirs. This solution brings many advantages, such as reducing damage caused by floods by an average of 2000 billion tomans per year, the absence of problems related to waste in the water desalination project, no change in biodiversity in the area, no need for fresh water and pumping station, supplying drinking water to the region as well as water supply for industrial and agricultural purposes. One of the best areas for storing water and preventing floods in Sistan and Baluchistan province is the Chahan syncline, which is located in the south of the Chahan river in the northernmost part of the coastal Makran. In this syncline, the rate of evaporation to compare with surrounding plains is lower and water storage is better, and the necessity for dam construction in the region is not important.

Considering all the above, mentioned items and the terrible flood of 2018 and also the flood of Esfand 1402, which caused heavy damage to residential areas, agriculture, animal husbandry, industry, health, services, environment and the road network of the province, and followed by the significant volume of water, (was estimated between million cubic meters to two thousand million cubic meters), entered the Oman Sea. Since 2019, The Fakoor Sanat Tehran Engineering company has conducted some studies in the southern Baluchistan region to control and guide these floods using innovative and compatible environmental methods. The results obtained from mentioned studies, which presented by the Barsad Shid Iranian Company promis a brigh future for the development of the Makran Region.

Mohammad Vahid Sheikh Zade Najar