Agricultural Water Efficiency Evaluation Method Based on Remote Sensing Technology
Water resources are not only natural resources for all living things, but also economic resources with important strategic significance. Water shortages have become an important constraint to global and regional food security and ecological security. At the same time, the efficiency of irrigation water use in China is generally low, the construction standards of irrigation districts are low, the supporting methods are incomplete, and the irrigation methods are extensive. The scientific and accurate evaluation of irrigation scale and crop water use efficiency in arid area is an important part of water resources management. Sustainable use and sustainable social development are essential. Among them, remote sensing technology is an important means of monitoring agricultural conditions in recent years. With its macroscopic, periodic and economical access to surface information, it has obvious advantages in monitoring crop planting conditions. At the irrigation area scale, meteorological and vegetation factors have great spatial variability. In addition to ground observations, remote sensing has become the main means of obtaining information on evapotranspiration in irrigation districts. In this paper, environmental satellite remote sensing data is used as an auxiliary data source, and stratified sampling is taken as the core to study the method of water use efficiency of crops. Using remote sensing technology to obtain surface spectral information for soil condition monitoring, which makes the focus of remote sensing monitoring of soil condition monitoring research, and studies the application of remote sensing evapotranspiration and crop yield estimation results in irrigation water use efficiency and crop water use efficiency evaluation in irrigation areas, and Data on specific studies of crops that can adapt to complex planting structures.