鲁西北平原冬小麦种植格局时空变化: 2000―2014

doi:10.6046/gtzyyg.2017.02.25

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摘要

鲁西北地区是我国主要粮食生产基地之一,冬小麦是该区最主要的夏粮作物。鲁西北地区冬小麦种植信息和时空变化特征,是该地区粮食安全研究的现实基础。根据鲁西北平原冬小麦的物候历,选取合适时间窗口下的Landsat TM/ETM⁺/OLI中、高空间分辨率卫星影像,获取其归一化植被指数; 设置合理阈值,识别了2000年和2014年鲁西北地区冬小麦的空间格局; 采取野外考察和Google Earth选取样本点相结合的方法进行了精度验证。研究结果表明: 鲁西北地区德州市辖区、夏津县、东营市利津县、沾化县、无棣县和聊城市辖区等6个区县的冬小麦分布较少,其余地区分布都比较广; 2000―2014年间鲁西北地区冬小麦种植面积由171.19万hm²减少到149.39万hm²,减少21.8万hm²,减幅为12.73%,集中分布在该区东北部、西部地区和区县中心的城市周边地区; 2014年鲁西北平原冬小麦提取总体精度为96.8%。

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关键词 ： PolSAR, 极化分解, Freeman/Eigenvalue分解, Neumann体散射模型

Abstract：

Winter wheat is one of the main food crops in northwest Shandong Province, a main grain production base in China, and therefore the application of remote sensing technique to monitoring the spatio-temporal pattern change of the winter wheat area has the important practical significance. In this study, the appropriate time window was selected according to calendar of main crops in northwest Shandong Province, and then the NDVIs of Landsat TM/ETM⁺/OLI images were calculated. After that, the threshold value range of NDVI was set to extract winter wheat in 2000 and 2014. Finally, 1404 sampling points were chosen through field survey and Google Earth to calculate the accuracy. The results show that winter wheat is spatially widely distributed in northwest Shandong Province, whereas things in Dezhou Municipal District, Xiajin County, Lijin County, Zhanhua County, Wudi County and Liaocheng Municipal District are just the opposite. The winter wheat area in 2000 in northwest Shandong Province was 1.71×10⁶ hm² and was 1.49 ×10⁶ hm² in 2014, with the decreasing range being 2.18×10⁵ hm² and the rate of change being -12.73%. The accuracy of extraction in 2014 was 96.8%.

Key words： PolSAR polarimetric decomposition Freeman/Eigenvalue decomposition Neumann volume scattering model

收稿日期: 2015-11-04 出版日期: 2017-05-03

基金资助:

国家自然科学基金重点项目“中国水土资源利用与粮食生产的平衡关系定量分析与数字模拟”(编号: 41430861)资助

通讯作者: 姜鲁光(1978-),男,副研究员,主要从事水土资源综合评价方面的研究。Email: jianglg@igsnrr.ac.cn。

作者简介: 赵庆庆(1990-),女,硕士研究生,主要研究方向为水土资源综合评价。Email: zhaoqq.13s@igsnrr.ac.cn。

引用本文:

赵庆庆, 姜鲁光, 李文叶, 封志明. 鲁西北平原冬小麦种植格局时空变化: 2000―2014[J]. 国土资源遥感, 2017, 29(2): 173-180.
ZHAO Qingqing, JIANG Luguang, LI Wenye, FENG Zhiming. Spatial-temporal pattern change of winter wheat area in northwest Shandong Province during 2000―2014. REMOTE SENSING FOR LAND & RESOURCES, 2017, 29(2): 173-180.

链接本文:

https://www.gtzyyg.com/CN/10.6046/gtzyyg.2017.02.25 或 https://www.gtzyyg.com/CN/Y2017/V29/I2/173

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