Study On Sustainable Land Use In Haidong City Based On Ecological Carrying Capacity

Land is the material foundation of human survival and development,the sustainable land use is a economic and social sustainable development important supporting conditions.However,due to the unreasonable economic development model and way of land use,soil and water loss,land desertification,soil salinization,soil pollution,biodiversity decrease and a series of ecological environment problems highlighted,the land ecological security and regional sustainable development pose a serious threat.Study on regional sustainable land use,therefore,is not only the urgent needs of the construction of regional ecological security pattern,and guarantee the sustainable development of regional economy,social reality.Haidong city in Qinghai province is located in the Qinghai-tibet plateau and the loess plateau transition zone,belongs to the ecological fragile zone and environmental sensitive area.The regional ecological environment,ecological carrying capacity level,is not only the long-term effects of land use in the past as a result,is also the future ecological foundation of sustainable land use.Papers use Haidong city from 2005 to2013 in land use change data and statistical data,analyzes Haidong city of land use dynamic changes(including quantity,dynamic,land use degree,five aspects such as the structure and intensity change);In combination with related literature at home and abroad,the selection of ecological elastic force,resources and environment carrying capacity,and social and economic indicators,pressure three aspects to build its action,evaluation index system of ecological carrying capacity,the evaluation of the level of regional ecological carrying capacity in 2013,reveals the regional ecological carrying capacity evolution from 2005 to 2013;uses the grey correlation analysis method,discusses its action,the response of the relationship between land use change and ecological carrying capacity.The main research conclusions are as follows:(1)Haidong city land use type its mainly as forest land,grassland and farmland.Between 2005 ~ 2013,the land use types have more obvious changes,the number of the garden,grassland and other land area is being reduced,cultivated land,forest land and construction land area increased;in land use dynamic change of land for traffic >other land > forest land > land for water facilities > garden land > urban and ruralconstruction land > cultivated land > grassland;Degree of land use change and the rate of change is positive;2005 ~ 2009,the land use structure change,and relatively stable land use structure change from 2009 to 2013;Index of land use intensity change order from large to small is: other land > forest land > grassland > cultivated land > land for water facilities > urban and rural construction land > land for traffic >garden land.(2)Haidong city districts and counties of ecological carrying capacity in 2013 are differences,Huzhu county,Ledu district,Xunhua county,Hualong county and Ping'an district of ecological carrying capacity in the general level,Minhe county is in the lower level;Although Haidong city from 2005 to 2013 in improving continuously the ecological carrying capacity,but still are in average.(3)Haidong city of land use change and the evolution trend of ecological carrying capacity is relatively consistent,social economic activities is the main driving factors of land use change in Haidong city.