林芝市退耕还林时期土地利用变化研究
A Study of Land Use Changes in Linzhi City During the Grain for Green Program Period
为揭示林芝市退耕还林后土地利用变化特征,探究不同的驱动因素与土地利用转化变化的关系,为西藏生态工程提供科学依据,本研究基于2000年、2010年和2020年林芝市土地利用变化数据,并结合统计资料展开分析。研究结果显示,在2000年至2020年期间,林芝市农田面积呈现增加趋势,具体面积变化为增加72.05 km²,可能与当地人口增长有关。土地利用中农田转换为森林、灌木、草地面积分别为56.30 km²、2.06 km²、60.53 km²。土地利用动态度方面,农田单一动态度由-1.83%变化为3.93%。农田转化为灌木和草地土地利用转化强度具有相对倾向性,农田转入森林相对强度与灌木和草地数值相似。在驱动因素与土地利用关系上,生产总值、第一、二、三产业生产总值与农田之间存在正相关性。经济增长和退耕还林政策的执行可能对林芝市土地利用改变产生了影响,政策对区域生态系统土地利用变化的具体影响,仍有待进一步验证。
To reveal the characteristics of land use changes after the conversion of farmland to forest in Linzhi City, explore the relationship between different driving factors and land use conversion changes, and provide a scientific basis for ecological projects in Xizang, this study was based on the land use change data of Linzhi City in 2000, 2010, and 2020, and combined statistical materials for analysis. According to the research results, during the period from 2000 to 2020, the farmland area in Linzhi City showed an increasing trend, with a specific area change of an increase of 72.05 km², which may be related to the local population growth. In terms of land use, the areas of farmland converted to forest, shrubland, and grassland were 56.30 km², 2.06 km², and 60.53 km², respectively. Regarding the dynamic degree of land use, the single dynamic degree of farmland changed from -1.83% to 3.93%. There was a relative tendency in the conversion intensity of farmland to shrubland and grassland. The relative intensity of farmland converted to forest was similar to the values of shrubland and grassland. In terms of the relationship between driving factors and land use, there was a positive correlation between the gross domestic product, the gross product of the primary, secondary, and tertiary industries, and farmland. Economic growth and the implementation of the policy of converting farmland to forest may have influenced the land use changes in Linzhi City. The specific impact of the policy on the land use changes of the regional ecosystem still needs further in-depth verification.
Land change / Dynamic degree / Transfer matrix / Linzhi City
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