Research on urban eco-environmental water requirements in Ningbo

Urban eco-environmental water requirements (UEEWR) is a new integrating concept, involving multi disciplinary content. Based on the present researches on UEEWR, this paper describes the efficient methods of calculation on UEEWR and takes the UEEWR calculation in Ningbo as an instance. In the paper, he author points out that a city's eco-environmental water requirements should include two parts: vegetation water requirement and river and lake water requirements. Though applying the calculation method and referring to related materials, including Landsat Image Map of Ningbo, History and Geography Book of Ningbo and Statistical Yearbook of Ningbo, etc, the author figures out that the annual UEEWR of Ningbo is 8 369.98× 104m3.