GNSS-R陆面遥感为重要补充的土壤水分监测体系设计

The Design of a Soil Moisture Observation System with GNSS-R Land Remote Sensing as a Major Supplement

介绍了GNSS-R陆面遥感的原理和发展现状,在重庆市土壤水分监测现状分析基础上,设计了一种面向用户需求的土壤水分综合监测体系.在方案设计中,对人工测墒、地面气象站、自动土壤水分监测、卫星遥感干旱监测、 GNSS-R陆面遥感等5种监测手段进行了时间分辨率、空间分辨率、观测代表性的对比分析,说明将GNSS-R陆面遥感作为重要补充进行综合土壤水分监测体系设计是可行的、有益的.研究表明, GNSS-R路面遥感的应用可进一步提高重庆市土壤水分监测体系时空分辨率,填补自动土壤水分观测和卫星遥感在时间分辨率、空间分辨率之间的衔接空白,拓展GNSS连续跟踪站网新应用.与雷达估测降水、卫星重力、陆面资料同化结合,可为长江上游水资源动态监测提供支撑.

In this paper, the principle of GNSS-R land remote sensing and its current development are described. Based on an analysis of the current situation of soil moisture monitoring in Chongqing, a customer demand-oriented comprehensive soil moisture monitoring system is designed. In the project design, based on a comparison of the temporal resolution, spatial resolution and representativeness among manual soil moisture measurement, surface meteorological station, automatic soil moisture monitoring, satellite remote sensing soil moisture monitoring and the proposed GNSS-R land remote sensing, the feasibility and desirableness of designing a comprehensive soil moisture monitoring system with GNSS-R land remote sensing as an important supplement are proved. It is significantly increase the soil moisture monitoring network density, fill the gap between automatic soil moisture stations and satellite remote sensing in temporal and spatial resolution, and also expand the new application of the GNSS-CORS network. Combined with the radar-estimated precipitation, satellite gravity and land data assimilation. This comprehensive soil moisture monitoring system may provide a powerful support for the dynamic water resource monitoring of the Yangtze River.