A projection of future climate refugee growth rate in South eastern Nigeria

: The water resources shortage and water environment worsen have been becoming primary restraining factors to development of economy and society in Beijing- Tianjin- Hebei region. The evaluation of water resources carrying capacity is the key to regional water reasonable utilization. In this paper, according to the view of development of economy and society is supported by water resources, the eleven factors which mainly effect water resources carrying capacity have been selected as assessment indexes. An evaluation approach of research the effect on water resources carrying capacity by water transfer based on water quantity, water quality, water area and water flow has been established. The results indicate that the water carrying capacity are belong overloaded in Beijing-Tianjin-Hebei region, especially in Tianjin and Beijing. The carrying press is mostly from water resources system, the water shortage is the major reason of water carrying capacity overloading in Beijing-Tianjin-Hebei region, and the per capita water resources is the key factor to regional water carrying capacity. The water transfer is certainly important to improve water carrying capacity in Beijing- Tianjin- Hebei region, especially for Beijing and Tianjin. In drought period, the results of improve water carrying capacity by water transfer is more evident, for example the water resources carrying capacity had been improved 13% in Tianjin through water transfer from Luan River and Yellow River to Tianjin in 2000, when is very dry year. The south water to north make water carrying capacity improve 5% in Beijing and Tianjin, respectively. It supply an foundation for water resources reasonable utilization in Beijing-Tianjin-Hebei to research of effect on water resources carrying capacity by water transfer, and it is also important to realize the harmony among water resources, economy and society in region.