基于GIS的丘陵区耕地景观格局时空演变特征分析

以四川省绵阳市涪城区为例，运用景观格局原理与GIS空间分析方法，分析1996--2009年期间耕地景观时空格局及其演变机理（驱动力）。结果表明：13年间，研究区耕地面积呈急剧减少的趋势，变化率明显高于省内丘陵区平均水平；耕地景观空间格局稳定性逐步降低，格局时空变化的地形分异特征显著；变化趋势受坡度、新增建设用地、人口密度、高程、城镇化水平、GDP、起伏度等负向驱动力与灌溉条件、等级公路水平、土地整理程度等正向驱动力因子共同影响。

The spatial-temporal evolution of landscape pattern for farmland in the hilly area based on GIS

Based on the landscape theory, remote sensing （RS） and geographic information system （GIS）, taking Fucheng District, Mianyang City, Sichuan province, as an example, it analyses the northwest hilly farmland structure and its spatial evolution and temporal patterns, and probes into the temporal evolution of land mechanism （driving force） by using the land use database （1996-2009）. The result indicates that during the past 13 years, there has been a sharp decline trend in arable land in the studied area, and its dynamic equilibrium is much higher than the average level of the province. The stability of farmland landscape pattern in the studied area has been reduced gradually, and the pattern of temporal and spatial variation of the terrain varies significantly. The temporal evolution of farmland landscape has been jointly affected by such negative driving forces as the slope land, the new construction sites, the population density, the elevation, the urbanization＇ GDP, such positive driving forces as the irrigation conditions, the level of high-grade highways, and the land intensity, etc.