绵阳市土地利用程度差异性研究

摘要

Based on the second land survey data in 2009 and land survey data in 1995,difference of land use degree in Mianyang City were analyzed by using mathematical model.The results indicated that:the changing condition of land use degree presents obvious regional difference.With the accelerating of urbanization,the change value of land use degree is the highest in Fucheng District and Youxian District,the area of residential and industrial land and traffic and transmission land and garden plot increased,the area of cultivated land and forest land reduced in two districts; the change value of land use degree is at moderate level in Santai County and Yanting County and Zitong County and Jiangyou City,the area of cultivated land and forest land increased in hilly area; the change value of land use degree is the lowest in Pingwu County and Beichuan County.All land area reduced in Pingwu County except forest land area.Due to the influence of Wenchuan earthquake,some cultivated land was damaged in Beichuan County,the engineering measures and biological measures such as land reclamation were used to repair land.%根据1995年绵阳市土地利用详查数据和2009年绵阳市第二次土地调查数据,运用数学模型对绵阳市所辖各区县土地利用程度变化状况及其区域差异进行分析.结果表明,不同区县间土地利用程度变化情况呈现出明显的地域性.位于主城区的涪城区、游仙区土地利用程度变化值最大,随着城市化进程的加快,2区城镇村及工矿用地、交通运输用地、园地增长迅速,耕地、林地有所减少；地处丘陵区的三台县、盐亭县、梓潼县、江油市等土地利用程度变化值总体处于中等水平,境内耕地和林地面积呈增长态势；平武县和北川县2个山区县土地利用程度变化值相对较小,平武县除林地外其余地类面积都不同程度地减少,北川县耕地等地类在汶川地震中被部分损毁,目前正通过土地复垦等工程和生物措施进行修复.