Nigeria is the country holding the large population of 120 million occupying 15 % of total population in Africa and producing oil and gas ranking 8th in the world. There are existing also large land resources suitable for agriculture and surface and ground water resources such as the large river basins of Niger, Benue, Sokoto, etc. Nigeria has carried out many water resources development projects for agriculture and domestic and industrial water supply since 1970s. However, the large scale reservoir dams had been mostly constructed by the credit of foreign contractor based on security of oil fund, but not properly operated by the government. Accordingly urban and rural areas have been suffered from water shortage problem. In order to improve the existing water use and promote the proper water resources development and water use in future, the following master plan for the national water resources is set up and proposed to Ministry of Water Resources in Nigeria.

-The country is divided into more than 500 sub-basins and small sub-basins by using satterite image and hydrological conditions.

-Potential and available water resources, existing and future land use for forest and farm land, water demand for agriculture and urban and rural water supply, population and provincial domestic product, etc. are estimated on the sub-basin basis.

-As for the existing developed water resources, the improved plan for reservoir water use, water allocation based on water demand, irrigation water supply system, water supply system, operation and maintenance organization is set up.

-As for the new water resources development, the medium and small scale irrigation plan, water treatment plan for major city, ground water development plan by wells in rural water supply, etc. are set up.