Spot-5遥感数据在北方农牧交错带景观结构特征研究中的应用——以河北省沽源县为例

Character of Landscape Structure in the Ecotone between Agriculture and Animal Husbandry in Northern China Using Spot-5 Remote Sensing Data

受尺度的限制,空间分辨率较低的遥感影像很难对特定村落景观进行分析,而高分辨率影像可以更好的反映地类空间信息、地物的尺寸、形状等特征,该文利用高分辨率的SPOT 5影像,以河北省沽源县为例,分析了北方农牧交错带不同地貌部位的村级景观单元在景观结构上的不同特征。位于农牧交错带的沽源县,由于其高亢的地势与农牧交错的特殊人类活动方式,使其形成了显著区别于华北农区而又不同于内蒙牧区的特殊的农田与牧场犬牙交错的地表基本景观结构。论文归纳出牧业占优势的南部山地牧林农景观、以农为主的中部丘陵平原农牧过渡景观、农业占优势的西部波状高原农牧景观、牧业占优势的北部河漫滩冲积平原牧农景观4个景观结构类型,对其不同的景观结构特征进行了描述。

Limited by the scale,it is difficult to analyse the special village-landscapes using remote sencing images of low spatial resolution .But the high-resolution remote sencing images of such as spot-5,could reflect the spatial information and the relation of size and shape of landscape and the abundant detail information the best. The paper recounts the geometric correction,matching and fusion of 2.5m panchromatic and multi-spectrum data using 1∶10 000 landuse map or relief map and digital elevation model(DEM)in brief.Based on high-resolution remote Sensing image,this paper analyses the different characters of the village-level landscapes structure in different physiognomy positon in big scale in Guyuan count of Hebei province lying in the ecotone between agriculture and animal husbandry in northern China.For the highland topography and the special human activity between agriculture and animal husbandry,the base landscape structure of the study area is crisscross motion between cropland and pastureland that is obviously different with the farming area in north china and the pasturing area in Neimeng.The paper concludes four landscape types: the pastureland being in the ascendant pasture-farm-forest mountanious region landscape in south area,the cropland being in the ascendant farm-pasture hilly region and plain transition landscape in middle area,the cropland being in the ascendant farm-pasture undulant highland landscape in west,and the pastureland being in the ascendant pasture-farm river valley and alluviation plain in north.From the analysis of the landscape structure,the transformation laws because of the interaction of natural and human being should be found in the four village-landscapes.