Various irrigation schemes in India were classified by the erstwhile planning commission into three parts viz. Minor, Medium and Major irrigation schemes. Major irrigation schemes are those schemes which have a culturable command areas (CCA) of More than 10,000 hectares. The medium irrigation schemes have a culturable command areas of hectares. Minor schemes are those with culturable command areas up to 2000 hectares. Cultural command area is the basis for the design of water course and basis for the design of an irrigation project. It is the proportion of the Gross Command Area which is Culturable and cultivable.