【摘要】 通过对地面数字高程模型的分析,基于3维地学模型的理论进行水源涵养林耗水量化分析和可视化模拟。根据不同时相的地面林斑、光照、温度、坡向、林分类型变化进行的水源涵养林耗水量的计算。小流域水源涵养林耗水量化分析对于水源涵养林的建设、保护水源、生态环境保护利用具有十分重要的意义。立足于3S技术应用的研究,通过GPS,RS获取空间数据,以GIS为分析平台,建立数字高程模型(DEM),土地利用类型、水源涵养林分类型、土壤类型等矢量图层,进行空间数据与属性数据连接、矢量数据运算等操作,采用综合彭曼公式分析了研究区域的水源涵养林单木耗水量。更多还原

【Abstract】 This article describes the use of a distance model, which is based on the 3S model theories of global positioning systems(GPS), geographical information systems (GIS) and remote sensing (RS). The distance model is used to analyse the amount of water consumed in real and simulated water conservation forestry. The quantitative analysis of water conservation forestry is useful to macro-decision making in relation to water consumption. Calculation of the amount of water consumed accounts for forestry plot conditions, forest type, slope direction, solar radiation incidence and temperature. The 3S based model utilises spatial information and a resulting digital elevation model to generate vector graphs for land use, water conservation, forest type and soil type. These are used with Penman-Monteith to calculate the water consumption of the research forest area.更多还原