为加强公路建设对表土资源的保护，研究提出了一种公路建设表土资源的识别和量化方法。首先采用3S 技术对公路区域遥感影像进行解译，识别公路沿线土地利用类型，再根据不同土地利用类型在遥感解译图上布设现场调查的位置并开展表土调查，通过分析评价表土的类型、结构和养分等具体指标，识别出公路沿线需要开展表土资源保护的土地利用类型、厚度、位置以及保护剥离总量。该方法在海南中线高速公路建设中进行了试验应用，取得了较好的表土资源保护效果，表明该方法具有可行性和推广性。

In order to strengthen the protection of topsoil resources in highway construction, a method to identify and quantify the topsoil resource in highway construction was provided. Firstly, remote sensing image of highway area was interpreted by 3S technology to identify the land use types along highway. Then according to different land use types, site survey locations were lied on the map of remote sensing interpretation. After that topsoil investigation was carried out at each location including the type, structure, nutrient and other specific indicators. Finally, the data of the indicators was analyzed and evaluated to identify the types, thickness, amount and locations of topsoil that needed protection. Practical experiments and applications were applied in the construction of Middle Line Expressway in Hainan and got a well protective effect on topsoil. The results show that this method has certain feasibility and promotion.