摘要
This paper, taking Beiwenquan Town of Beibei, Chongqing as an example, assessed the impacts of land use on ecological health by comprehensive index method, and discussed methodological system of sustainable land use planning based on ecological health. Results indicated that: 1) From 1992 to 2002, land use changes focused on 12 patterns with the total conversion area of 92.11%, which were related to cultivated land, residential and industrial-mining area, and orchard land. Urbanization and economic reconstruction were the leading driving forces. 2) There was obvious difference of the areas of ecotypes driven by land use change in wide valley and mild slope between 1992 and 2002, while there were little or no difference in steep slope and very steep slope. 3) Both of the conditions of ecological health in 1992 and 2002 were sound, and the ecotypes focused on the types of health and sub-health. But, health ecosystem in 1992, with an area of 764.64ha, accounting for 38.51% of the total evaluation area, was better than that in 2002, with an area of 636.10ha, accounting for 34.19% of the total evaluation area. 4) The ecotypes involved into different ranges have already degenerated, due to humankind’s disturbance, while the conditions of ecological health in the same ranges in 1992, regardless of stability and reconstruction, were better than that in 2002. 5) The planning scenario based on ecological health was accorded with the practice condition of Beiwenquan Town: 388.29ha of cultivated land could meet the Beiwenquan demand of food and byproduct; 1045.26ha of forest land area, the Beiwenquan demand of ecological health; and 1004.73ha of the residential and industrial-mining area, the Beiwenquan building demand. 6) Sustainable land use planning based on ecological health had higher useful value, because it not only stood to ecological theory, but also satisfied the developmental demand of society and economy.
This paper, taking Beiwenquan Town of Beibei, Chongqing as an example,assessed the impacts of land use on ecological health by comprehensive index method, and discussedmethodological system of sustainable land use planning based on ecological health. Results indicatedthat: 1) From 1992 to 2002, land use changes focused on 12 patterns with the total conversion areaof 92.11%, which were related to cultivated land, residential and industrial-mining area, andorchard land. Urbanization and economic reconstruction were the leading driving forces. 2) There wasobvious difference of the areas of ecotypes driven by land use change in wide valley and mild slopebetween 1992 and 2002, while there were little or no difference in steep slope and very steepslope. 3) Both of the conditions of ecological health in 1992 and 2002 were sound, and the ecotypesfocused on the types of health and sub-health. But, health ecosystem in 1992, with an area of764.64ha, accounting for 38.51% of the total evaluation area, was better than that in 2002, with anarea of 636.10ha, accounting for 34.19% of the total evaluation area. 4) The ecotypes involved intodifferent ranges have already degenerated, due to humankind's disturbance, while the conditions ofecological health in the same ranges in 1992, regardless of stability and reconstruction, werebetter than that in 2002. 5) The planning scenario based on ecological health was accorded with thepractice condition of Beiwenquan Town: 388.29ha of cultivated land could meet the Beiwenquan demandof food and byproduct; 1045.26ha of forest land area, the Beiwenquan demand of ecological health;and 1004.73ha of the residential and industrial-mining area, the Beiwenquan building demand. 6)Sustainable land use planning based on ecological health had higher useful value, because it notonly stood to ecological theory, but also satisfied the developmental demand of society and economy.
基金
Under the auspices of the Key Project of Science and Technology oftheMinistryofEducation(No .03111) and In-cubationFund ProjectofScienceand Technology Committee ofChongqing (No .017079)
