Spatial-temporal pattern change of winter wheat area in northwest Shandong Province during 2000―2014

doi:10.6046/gtzyyg.2017.02.25

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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%.

Keywords PolSAR polarimetric decomposition Freeman/Eigenvalue decomposition Neumann volume scattering model

Issue Date: 03 May 2017

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	HE Lian
	QIN Qiming
	REN Huazhong

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HE Lian,QIN Qiming,REN Huazhong. Spatial-temporal pattern change of winter wheat area in northwest Shandong Province during 2000―2014[J]. REMOTE SENSING FOR LAND & RESOURCES, 2017, 29(2): 173-180.

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https://www.gtzyyg.com/EN/10.6046/gtzyyg.2017.02.25 OR https://www.gtzyyg.com/EN/Y2017/V29/I2/173

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