库布奇沙漠IWEMS (Integrated Wind-Erosion Modelling System)模型数据集
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一、概述 本数据集包含了IWEMS模型运行所需要的地形数据、土壤数据、气象数据、土地利用数据、NDVI数据等。所有图件与相关点位坐标（气象站）都采用了等角投影UTM/WGS94坐标系统。 二、数据处理说明 将所有图件和相关的点位坐标（气象站）都采用等角投影UTM/WGS84坐标系统。 三、数据内容说明 数据内容主要包括： 基础地形数据包括库不齐沙漠（DEM）及流域河网，河网作为风沙传输的边界，DEM格网的大小为250 * 250 m，河网是利用ASTER-GDEM地形数据利用河道烧录法提取而出。 土壤数据，包括土壤物理、化学及土壤类型空间分布资料。根据中国1:100万土壤数据库剪切而来，转化为ESRI-grid格式，格网大小为250 * 250 m。 气象数据，包括库不齐沙漠周围包头、东胜与临河气象站的逐日数据，时段为2002-2010年。包括降水、风速与风向数据。 土地利用数据，2000年土地利用数据，比例尺为1:10万。将其转为ESRI-grid格式，格网大小为250 * 250 m。 四、数据使用说明 对黄河沿岸风沙危害进行评价，对黄河上游风沙入黄量进行估算，对该地区建立风沙危害预警系统提供数据支持。
1. Overview This dataset contains topographic data, soil data, meteorological data, land use data, NDVI data and other necessary data for the operation of the IWEMS model. All maps and relevant point coordinates (meteorological stations) adopt the conformal projection UTM/WGS94 coordinate system. 2. Data Processing Instructions All maps and relevant point coordinates (meteorological stations) shall adopt the conformal projection UTM/WGS84 coordinate system. 3. Data Content Description The data content mainly includes: Basic topographic data includes the Kubuqi Desert DEM and the basin river network. The river network serves as the boundary for sand and dust transport. The grid size of the DEM is 250 * 250 m, and the river network is extracted from ASTER-GDEM topographic data using the channel burning method. Soil data includes spatial distribution data of soil physical and chemical properties and soil types. It is clipped from the China 1:1,000,000 Soil Database, converted to ESRI-grid format with a grid size of 250 * 250 m. Meteorological data includes daily data from Baotou, Dongsheng and Linhe meteorological stations around the Kubuqi Desert, covering the period from 2002 to 2010, including precipitation, wind speed and wind direction data. Land use data: 2000 land use data with a scale of 1:100,000, which is converted to ESRI-grid format with a grid size of 250 * 250 m. 4. Data Usage Instructions This dataset provides data support for evaluating sand and dust hazards along the Yellow River, estimating the amount of sand and dust entering the Yellow River in the upper reaches of the Yellow River, and establishing a sand and dust hazard early warning system in this region.
