Research on Landscape Pattern Construction and Ecological Restoration of Jiuquan City Based on Ecological Security Evaluation

Jiuquan City is a typical ecologically fragile area in the arid areas of Northwest China, and unreasonable human activities directly affect regional ecological security. Scientifically, it necessary to construct an landscape pattern on basis security evaluation. This paper selected evaluation factors based perspective “environmental base interference”, used spatial principal component analysis (SPCA) comprehensively evaluate security, minimum cumulative resistance (MCR) model pattern. The results show that overall level study low, with moderate safety below 122,100 km2, accounting for 72.57% total area. identified source 6683 distribution extremely uneven, concentrated southern region; 32 corridors length 3817.8 km are identified, which corridor NO. 1–4 run through Qilian Mountains, 11 oasis areas, 14 nature reserves. 1376.1 km, 36.04% total. Forty-two nodes central more distributed; four restoration zones divided, including conservation zone, improvement control 34,380.3 61,884.4 21,134.4 50,648.3 respectively. Through delineation urban network composed corridors, nodes, as well zones, will be effectively improved. Furthermore, new method zoning used, hoping provide useful reference improving quality environment optimizing land.