Estimating winter wheat straw amount and spatial distribution in Qihe County, China, using GF-1 satellite images
Estimating winter wheat straw amount and spatial distribution in Qihe County, China, using GF-1 satellite images
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利用高分一号卫星影像估算中国齐河县冬小麦秸秆数量及空间分布
DOI：
10.1063/5.0033639
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发表时间：
2021-02
影响因子：
2.5
通讯作者：
Cao Jinxin
中科院分区：
文献类型：
--
作者：
Mou Huawei;Li Huan;Zhou Yuguang;Zheng Yongjun;Dong Renjie;Cao Jinxin
农作物秸秆被认为是一种重要的可再生能源。中国每年生产约10亿吨农作物秸秆，但其中35%没有得到有效利用。为促进秸秆资源回收利用，提出了一种新的区域冬小麦秸秆产量估算方法。获得了齐河县的中分辨率（16 m）GF-1卫星图像。通过对冬小麦与林地、裸地、水体、居民点等其他土地覆盖类型进行区分，利用时间序列归一化差分植被指数（WNDVI）值对样本进行加权，生成冬小麦WNDVI图像。采用支持向量机的四种核函数进行图像分类。选取精度最高的线性核函数构建了山东省齐河县冬小麦种植园面积提取模型，建立了该地区冬小麦秸秆理论资源总量和空间分布的估算方法。结果表明：齐河县冬小麦秸秆主要集中在中南部地区，其次是北方地区;中北部地区中心城区秸秆浓度最低。全县冬小麦秸秆资源理论总量为690 497 t，理论可采量为504 063 t。估计数据与统计数据的误差仅为1.27%，表明SVM和WNDVI能够准确识别齐河县冬小麦，并能估计齐河县冬小麦秸秆的空间分布。
Crop straw is considered an important renewable energy source. China produces approximately one billion tons of crop straw annually, but 35% of this yield is not used effectively. In this study, a novel method for estimating the regional winter wheat straw yield was developed to promote straw resource recovery. Medium resolution (16 m) GF-1 satellite images of Qihe County were obtained. A weighted normalized difference vegetation index (WNDVI) image of winter wheat based on time-series normalized difference vegetation index values was generated by weighting samples to distinguish winter wheat from other land cover types, such as woodland, bare land, water, settlement, and other cultivated land. Four kernel functions of support vector machines (SVMs) were used for image classification. The linear kernel function with the highest accuracy was selected to construct the extraction model of the winter wheat plantation area in the Qihe County, Shandong Province, China, and the estimation method for total theoretical resources and spatial distribution of winter wheat straw in the region was established. The results show that the winter wheat straw in the Qihe County was mainly concentrated in the central and southern regions.followed by the northern region; the central urban districts in the central-north region had the lowest straw concentration. The theoretical total quantity of straw resources of winter wheat in the county was 690 497 t; and the theoretical recoverable resource quantity was 504 063 t. The error between the estimated data and statistical data was only 1.27%, indicating that SVM and WNDVI can accurately identify winter wheat and estimate the spatial distribution of winter wheat straw in Qihe County.
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DOI：
10.1016/j.ejrs.2016.12.005
发表时间：
2018-04-01
影响因子：
--
作者：
Islam, Kamrul;Jashimuddin, Mohammed;Nath, Tapan Kumar
通讯作者：
Nath, Tapan Kumar
DOI：
10.5194/isprsarchives-xl-7-w3-45-2015
发表时间：
2015-04
期刊：
ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
影响因子：
--
作者：
N. Kussul;S. Skakun;A. Shelestov;M. Lavreniuk;B. Yailymov;O. Kussul
通讯作者：
N. Kussul;S. Skakun;A. Shelestov;M. Lavreniuk;B. Yailymov;O. Kussul
影响因子：
7.5
作者：
Zhi-Hua Zhou
通讯作者：
Zhi-Hua Zhou
DOI：
10.1007/978-3-540-73170-2_4
发表时间：
2007
期刊：
--
影响因子：
--
作者：
A. Ukil
通讯作者：
A. Ukil
影响因子：
6
作者：
M. Tum;J. Zeidler;K. Günther;T. Esch
通讯作者：
M. Tum;J. Zeidler;K. Günther;T. Esch