利用1990年和2000年的影像及统计数据,分析了珠江三角洲交通与土地利用的空间关系。结果表明,沿交通干线城镇建设用地与耕地呈现明显的廊道效应,离交通线距离越远,耕地所占比例逐渐增加,而城镇建设用地所占比例逐渐减少,空间分异现象明显。城镇建设和居民点建设以交通干线为依托,交通干线发展建设对耕地的冲击较强。通过对综合土地利用动态度和交通干线变化度的相关性分析,交通干线是影响区域土地利用变化的一个重要因素。如果不加控制地发展交通干线,势必对区域的土地利用产生不良的影响,特别是不利于耕地的保护。因此,要适当地控制交通干线的选址和建设规模,以稳定土地变化的速率,使整个珠江三角洲区域向良性、可持续地方向发展。
The paper analyses the spatial relationship between transportation and land-use,through the remote sensing figures and data statistics in the year of 1990 and 2000.It showed that the town constructed land and cultivated land show a corridor effect obviously along the transportation trunk line.The spatial differentiation is visible and the further the distance from the transportation line,the more the cultivated land,meanwhile the less the town constructed land.Town constructed land and residential area development rely on transportation development which will strike much on cultivated land.Through the pertinent analysis on dynamic degree of comprehensive land utilization and diversification degree of transportation trunk line,it reveals that the transportation trunk line is one of the key factors influencing the regional land utilization diversification.The exorbitant and inconsequential development of the transportation trunk line certainly will make negative effects on the regional land utilization,especially on the protection of cultivated land.Therefore,for the purpose of stabilizing the rate of land diversification,and the sustainable development of Pearl River Delta,the location and scale of transportation trunk line should be controlled properly.
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