Human activities such as using the river material destroyed the natural shape and population spot concentrate make this catastrophe more common with more damages than it was before.The river engineering plans attitude to protect and arrange the river’s shape in better way. The main activities categorize into following objects

۱٫ Take repossession of river bed and limits
۲٫ Protection and arrange the river critical points
۳٫ Flood control
۴٫ Dam investigation, study and design The objective of a hydro power

scheme is to convert the potential energy of a mass of water, flowing in a stream with a certain fall (termed the “head”), into electric energy at lower end of the scheme, where the power house is located .The important  point of this model of energy produced  could be categorized into low cost for construction and operation, environment friendly activity , working as a main electricity net assistant , good economic parameters, high revenue and as a result of that , high interest for private investors