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野外人工降雨入渗实验是缺资料地区获取产流参数、开展水文计算的重要技术手段之一。福建省平潭岛属于典型稀缺资料地区,基础水文水资源观测数据缺乏。该文根据研究区地形坡度、土壤类型和植被覆盖等GIS空间信息,通过地学统计分析划分出11种下垫面类型区,结合野外调查确定典型实验点。利用自主产权的便携式野外人工降雨入渗实验装置开展不同下垫面和不同雨强等多情景条件下人工降雨入渗实验,获取降雨初损、土壤入渗率、产流系数等关键水文计算参数,为平潭岛水文模拟研究和水资源评估计算提供重要的科学依据。
Field artificial rainfall infiltration experiment is one of the important technical means to obtain runoff parameters in the lack of data area for hydrological calculation. Pingtan Island in Fujian Province is a typical scarce area with a lack of observational data on basic hydrological and water resources. Based on GIS spatial information such as topography gradient, soil type and vegetation coverage in the study area, 11 kinds of underlying surface type areas were identified by geostatistical analysis. Typical field survey sites were selected to determine the typical experimental sites. The artificial rainfall infiltration experimental device with independent property rights was used to carry out artificial rainfall infiltration experiments under multiple scenarios with different underlying surface and different rainfall intensity and to obtain the key hydrological calculation parameters such as initial loss of rainfall, soil infiltration rate and flow coefficient , Which provides an important scientific basis for hydrological simulation research and water resources assessment of Pingtan Island.