基于土层空间变异性的大比例尺土壤调查制图研究

该文提出了根据土层的空间变异性进行大比例尺土壤制图研究.该制图方法可顺次分为以下几步:①用GPS定位观察土壤剖面,划分土层;②确定调查区土壤类型,建立空间和属性数据库;③进行主要土层(诊断层)厚度的空间变异分析,选择和确定调查区土壤划分依据(诊断标准);④叠置分析,获得土壤类型图.通过对一个发育于页岩低丘陵土壤样区的应用研究表明,该方法制图可获得较高的准确性(94%).

Large scale soil survey and mapping based on the spatial variation of soil horizons

This paper put forward a proposal of large-scale soil survey and mapping based on characterization of the spatial variation of soil horizons.The framework of the method can be divided into four steps:(i) positioning of observation points with Global Positioning System(GPS),observing soil profiles and classifying soil horizon;(ii) determining soil types in the studied area,and establishing a database of soil attributes and spatial parameters;(iii) analyzing the spatial variations of thickness of the selected soil horizons(diagnostic horizon) supported by the Geographical Information System(GIS),and defining standards for soil classification;(iv) overlay processing of soil horizon maps,and developing a soil map.The method was applied to soil survey of a 28.3 hm~2 low hill where soils were developed from shale.Three soil series were identified in the studied area.The results indicated that the method was applicable for large-scale soil survey with a high accuracy(94%).