In the past, the construction of the dam was mainly for drinking water supply and irrigation of agricultural fields, but today it has been further developed due to the need for hydropower and other purposes. The estimated 20 billion cubic meters of freshwater abstraction in the world is one of the reasons for the importance of dam construction in today's world. Another important goal of dam construction is to improve and develop the irrigation and agriculture network of downstream lands. In countries such as Iran, where the temporal and spatial distribution of rainfall is inadequate and precipitation occurs in seasons that may require less water or most of the precipitation is concentrated in some areas. The only solution to this problem is to build reservoirs, and this is inevitable, especially in countries that rely on agriculture. At present, agricultural irrigation and water supply networks in Iran have led to the development, improvement and economic prosperity of the regions. Another major goal of dam construction is the use of hydroelectric power. The use of this resource, which is the cheapest type of energy in most countries of the world, has different purposes depending on the needs and construction characteristics. Today, the construction of dams with the aim of generating hydropower is a common practice and developed and even developing countries are taking full advantage of this existing potential. Iran ranks third in the world in dam construction. Khuzestan province has played an important role in promoting this position by placing one third of the country's water in its heart. Sazab Pardazan Consulting Engineers has been building capacity in this field since the early years of its presence in the field of consulting services and is proud to provide all aspects of river engineering services including studies with 30 years of activity and participation in the development and advancement of the country's development projects.Design and supervise 20 projects to fulfill their national duty in this regard. This consultant provides the following engineering services in this specialty. Feasibility studies - Surface and groundwater resources studies - Planning and water economy - Integration of surface and groundwater resources - River engineering - Water diversion facilities - Flood control and disposal - Improvement of river and concrete dams Engineering services for storage and Water control and tunnel power generation - Hydropower plants and ancillary structures - Other buildings and facilities related to dam construction - Design of a system for collecting and removing urban water in the description of water engineering services