论文部分内容阅读
农田蒸散是农田土壤蒸发和作物蒸腾的总称,基于热红外遥感的农田蒸散估算方法研究是农业遥感领域重要前沿课题之一。经过30多年的发展,基于热红外遥感的遥感蒸散算法逐渐成熟并广泛应用于农业、气象以及水文等多个领域。简要回顾基于热红外遥感地表温度与空气温度温差的经验方法、地表能量平衡的单层和双层模型、基于热红外遥感数据源的彭曼公式以及遥感参数化的Priestley-Taylor模型等多种遥感蒸散模型的基本原理、核心算法以及存在问题等研究。针对这些方法的优缺点,指出了基于热红外遥感的农田蒸散估算方法在农业遥感中尚需解决的关键问题,并提出可能的解决途径。
Farmland evapotranspiration is a general term for farmland soil evaporation and crop transpiration. Research on estimation of farmland evapotranspiration based on thermal infrared remote sensing is one of the most important frontier issues in the field of agricultural remote sensing. After more than 30 years of development, remote sensing evapotranspiration based on thermal infrared remote sensing has gradually become mature and widely used in many fields such as agriculture, meteorology and hydrology. A brief review of empirical methods based on thermal infrared remote sensing of temperature difference between surface temperature and air temperature, single-layer and double-layer models of surface energy balance, Penman formula based on thermal infrared remote sensing data sources, Priestley-Taylor model with remote sensing parameters, The basic principle of evapotranspiration model, the core algorithm and the existing problems. In view of the advantages and disadvantages of these methods, the key problems to be solved in agricultural remote sensing based on thermal infrared remote sensing are pointed out, and the possible solutions are proposed.