This paper calculated the ecological footprint

ecological carrying capacity

ecological surplus/loss in the Weihe basin of Guanzhong region in Shaanxi province during the period of 1986~2002

with the theory and method of the ecological footprint. In this paper

the concept of ecological pressure index was put forward

and two models were set up for calculating ecological pressure index as well as predicting ecological footprint

ecological carrying capacity

ecological surplus and ecological safety changing. At the same time it assessed the demand for ecological footprint for ten thousand yuan GDP of this area. The results of study indicated: (1)The ecological carrying capacity of this area showed a tendency of reduction.(2)The ecological footprint showed a tendency of increase. (3)The index of the ecological pressure increased from 0.75 to 1.20 from 1986 to 2001

and the increased range was 0.45 which was large comparatively.(4). Guanzhon region have already been overloaded heavily and developed in an unsafe state. (5)The ecological footprint for ten thousand yuan GDP was 3.11 hm~2

and the efficiency for utilizing resource was high relatively.