Analysis of Ecological Impact and Mitigation Measrues

4.2 Analysis of Ecological Impact and Mitigation Measrues

4.2.1.1 Analysis of land use impact

According to the airport the airport total plane plans, the need to levy permanent land 148.8573hm². In construction period, evaluation area for airport construction leads to the change of land use in Table 5-1-1.

Table 5-1-1 Conditions of change in land use type of evaluation area

Airport Road projects all front to commandeer land 27.8 hm². In addition to construction site, temporary road, material yard and other temporary land. The expropriation of land occupied land cover types are permanently change, land vegetation removed permanently, the functions of land use change, surface covering properties change. The temporary occupation of land surface vegetation destruction, surface properties change, regional surface exposed to increase, environmental stability decreases, for wind, hydraulic action sensitivity enhancement, more prone to deterioration of ecological environment. In addition, road construction to take up civilian curtilage, will cause the relocation of residents, to occupy the new land. However, Airport Avenue project covers an area of small, supporting pipeline engineering and drainage engineering without permanent occupation, not on land use pattern produces an effect.

(1) Biomass loss

Construction period to evaluation area vegetation mainly manifested as airport terminal area engineering, site formation, Earth cut and fill the original soil structure is changed, the destruction of the original vegetation of the area, resulting in vegetation composition and structure to change, which causes the plant biomass loss. Through consulting relevant literature collection of plant communities, the local forestry departments have investigation on evaluation area; the main type of plant community biomass is estimated in Table 5-1-2.

Table 5-1-2 Statistics of plants biomass in evaluation area and occupied area