Abstract: Taking the Hexi Corridor in Gansu Province,a typical arid area in northwest China,as the research subject,this paper established the resource-environmental pressure index(REPI)and evaluation criteria for the regional urbanization development and resource-environmental pressure,on the basis of the pressure index(PI) of resource and environment. REPI is composed ofRECI(resource-environmental consumption index)and EPI (environmental pollution index). By using REPI,the urbanization development and resource-environmental pressure in the Hexi Corridor in Gansu Province from 2000 to 2015 were evaluated and predicted,which can provide references for the collaborative development of economic society and resources environment. The results show as follows:(1)the eco-environmental pressure index(REPI)was increasing in the process of the urbanization of the Hexi Corridor from 2000 to 2015. From 2000 to 2002,the upward trend was gentler,but since 2003,REPI increased quickly,especially after 2006,the average growth rate of REPI per annum reached 4.4%,indicating that the resource-environmental pressure has been increasing and the rate of the deterioration of ecological environment was quickening. According to the prediction of the regression equation,on the current trends,the resource-environmental pressure in the Hexi corridor will become enormous in 2026.(2)The change trend of RECI and EPI was significantly different in the study area from 2000 to 2015. RECI increased rapidly and the average growth rate of RECI per annum reached 5.9%. The pressure value calculated in 2012 reached 77.12,and in 2013, it broke through the cut-off point of 80 and the pressure was enormous. However,EPI changed little and fluctuated between 28 and 33,namely,the pressure was small.(3)The distribution characteristics of the data points show that the resource-environmental pressure was mainly resulted from the consumption of resources and energy. The emissions of industrial pollutants was not the main reason causing the resource-environmental pressure in the region and were under control. The innovations are:predicting the resource-environmental pressure index in the Hexi Corridor by using regression model,and proposing that the future development in Hexi Corridor should take the comprehensively regional natural resources,ecological environments and coordinated development of urbanization into consideration,and natural resources should be in the low consumption and high efficiency,ecological environment should be in the low pressure and reinforced protection,economic development should be in the high efficiency and urban development should be in the balanced coordination.

Key words: urbanization, resource-environmental pressure, pressure index, the Hexi Corridor