基于地形起伏度的耕地与聚落耦合关系演变研究——以都江堰市为例

Research on the Development of the Coupling Relationship between Cultivated Lands and Settlements Based on Relief Amplitude: Take the Case of Dujiangyan City

基于DEM数据提取都江堰市地形起伏度,利用都江堰市2005年与2011年耕地、聚落数据,借助Arc GIS软件平台,定量分析了都江堰市耕地、聚落及耕地-聚落耦合类型的时空分布特征及其分异规律.结果表明:1)都江堰市的地形起伏度以平原为主、台地和丘陵次之,山地面积较小;2)耕地、聚落在平原地区分布面积最大,并且随地形起伏度的增加不断减少;3)耕地偏少型主要分布在城区及建制镇,耕地偏多型主要分布在台地地区,耕地—聚落均衡类型主要分布在都江堰市城区周边;4)在不同地形起伏度上,以小起伏山地为界,耕地—聚落不同耦合类型在平原、台地、丘陵地区变化较明显,耕地偏少型都处于增加趋势,而其它类型则都处于减少趋势,在小起伏山地至极大起伏山地地区,各类型的变化幅度小且变化的趋势比较复杂.

Based on the extracted relief amplitude from DEM data and the data of cultivated lands and settlements in 2005 and 2011 of Dujiangyan City, and the use of AreGIS software, this paper gave a quantitative analysis of the spatiotemporal distribution and its difference law of cultivated lands, settlements and the coupling type of settlements and cultivated lands. The results are as follow： 1 ） among the relief amplitude zone in Dujiangyan City, the plain covers the largest area, and mesa and hills second, and the mountains is the smallest; 2） in the plain, the area of cultivated lands and settlements is the largest, and decreases with the increase of relief amplitude; 3 ） the urban and the organic town have the less cultivated lands which mainly distribute in the mesa area and the balanced type of settlements and cultivated lands are mostly located in the surroundings of Dujiangyan City; 4） in the interior of each kind of landscape in every relief zone, take the low relief amplitude mountain as a boundary, the different coupling patterns of cultivat- ed lands and settlements in plain, mesa and hills have a significant change. The type of more cultivated lands tends to increase and other types are decreasing. From the low relief amplitude mountain to the higher, each type varies within a small range and has a com- plex changing trend.