Research on the eco-geological environment carrying capacity in pingwu county after the wenchuan earthquake based on the modified AHP

Many counties in southwestern China were devastated by the Wenchuan earthquake, and this earthquake also induced several geological hazards. Therefore, evaluation of eco-geological environment disaster area is essential for county restoration ecological remediation. This research considers Pingwu County, which located 89 km from epicenter as study to evaluate carrying capacity. First, three index layers are built an capacity model after including geological, social environments. Then, evolutionary algorithm used modify analytic hierarchy process (AHP). By optimizing consistency ratio AHP, most consistent matrix can be obtained. Finally, we calculate via best obtain a hierarchical map through grid rasterization. The results indicate that current County mainly contains two states, equilibrium surplus states. According map, suggests focusing on protection monitoring eastern northern areas Pingwu, large infrastructures should central southern areas, land use capability further improved. Moreover, construction optimized, scale regional controlled, original species natural maintained.