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Research on remote sensing information and WheatSM model-based winter wheat yield estimation

机译：基于遥感信息和WheatSM模型的冬小麦产量估算研究

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摘要

The research was implemented in a planted area dominated by winter wheat in the Hebi city of Henan Province driving method and EnKF assimilation method were used to coupling the optimized and reconstructed MODIS LAI time series data and the rigorously calibrated wheat growth model WheatSM(Wheat Growth and Development Simulation Model) developed according to the planting varieties of the winter wheat region in North China respectively, the research on winter wheat yield estimation was conducted at field scale and regional scale from 2013 to 2016.The results show that: (1) The coupling simulation precision was inferior to the pre-coupled simulation precision at field scale simulation.(2)When the grid was used for regional scale simulation, the simulation accuracy of 1 km resolution grid point is higher than 5km resolution.(3)At two kinds of grid resolutions, EnKF assimilation simulation has the highest accuracy, followed by the driving method, and the simulation precision before coupling is the lowest. The RMSE of the total output of the EnKF assimilation simulation area and the actual total output at the 1 km resolution grid is 15.1. Assimilation of remote sensing information at fine grid resolution can improve the precision of regionalization application of the WheatSM model.
机译：该研究是在河南省鹤壁市以冬小麦为主的种植区上进行的驱动方法，并使用EnKF同化方法将优化和重建的MODIS LAI时间序列数据与经过严格校准的小麦生长模型WheatSM（Wheat Growth and分别根据华北地区冬小麦种植品种的不同，开发了开发模拟模型，并于2013年至2016年在田间规模和区域规模上进行了冬小麦单产估算的研究，结果表明：（1）耦合模拟精度不如现场尺度模拟的预耦合模拟精度。（2）将网格用于区域尺度模拟时，1 km分辨率网格点的模拟精度高于5km分辨率。（3）两种在网格分辨率方面，EnKF同化模拟的精度最高，其次是驱动方法，耦合前的模拟精度是最低的。 EnKF同化模拟区域的总输出与1 km分辨率网格上的实际总输出的RMSE为15.1。以精细的网格分辨率对遥感信息进行同化可以提高WheatSM模型的区域化应用的精度。

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  • 来源
    《Land surface and cryosphere remote sensing IV》|2018年|107770T.1-107770T.9|共9页
  • 会议地点 Honolulu(US)
  • 作者

    Li Ying; Chen Huailiang; Tian Hongwei; Zhang Yu; Li Tongxiao;

  • 作者单位

    CMA·Henan Key Laboratory of Agrometeorological Support and Applied Technique, Zhengzhou 450003, China,Henan Institute of Meteorological Sciences, Zhengzhou 450003, China;

    CMA·Henan Key Laboratory of Agrometeorological Support and Applied Technique, Zhengzhou 450003, China,Henan Provincial Meteorological Service, Zhengzhou 450003, China;

    CMA·Henan Key Laboratory of Agrometeorological Support and Applied Technique, Zhengzhou 450003, China,Henan Institute of Meteorological Sciences, Zhengzhou 450003, China;

    College of Water Conservancy Environmental Engineering, Zhengzhou University 450001, China;

    CMA·Henan Key Laboratory of Agrometeorological Support and Applied Technique, Zhengzhou 450003, China,Henan Institute of Meteorological Sciences, Zhengzhou 450003, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    WheatSM; EnKF; Driving method; yield estimation;

    机译：WheatSM； EnKF；驱动方式产量估算;

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