The Detecting of Irrigated Croplands Changes in 1987–2015 in Zhangjiakou
The distribution of irrigated and rained croplands has a large impact on agricultural production and ecological systems. Zhangjiakou, which is the water conservation area of Jing-jin-ji agglomeration and the host city for the 2022 Winter Olympic Games, has large irrigated croplands and a fragile eco...
Main Authors: | , , , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
IEEE
2021-01-01
|
Series: | IEEE Access |
Subjects: | |
Online Access: | https://ieeexplore.ieee.org/document/9464954/ |
id |
doaj-dd780eeac2d1464787a94f3346bb84d3 |
---|---|
record_format |
Article |
spelling |
doaj-dd780eeac2d1464787a94f3346bb84d32021-07-13T23:00:36ZengIEEEIEEE Access2169-35362021-01-019960769609110.1109/ACCESS.2021.30924089464954The Detecting of Irrigated Croplands Changes in 1987–2015 in ZhangjiakouZijuan Zhu0https://orcid.org/0000-0002-4314-1394Zengxiang Zhang1Lijun Zuo2Feifei Sun3Tianshi Pan4Jun Li5Xiaoli Zhao6Xiao Wang7Chinese Academy of Sciences, Aerospace Information Research Institute, Beijing, ChinaChinese Academy of Sciences, Aerospace Information Research Institute, Beijing, ChinaChinese Academy of Sciences, Aerospace Information Research Institute, Beijing, ChinaChinese Academy of Sciences, Aerospace Information Research Institute, Beijing, ChinaChinese Academy of Sciences, Aerospace Information Research Institute, Beijing, ChinaZhangjiakou Academy of Agricultural Sciences, Zhangjiakou, Heibei, ChinaChinese Academy of Sciences, Aerospace Information Research Institute, Beijing, ChinaChinese Academy of Sciences, Aerospace Information Research Institute, Beijing, ChinaThe distribution of irrigated and rained croplands has a large impact on agricultural production and ecological systems. Zhangjiakou, which is the water conservation area of Jing-jin-ji agglomeration and the host city for the 2022 Winter Olympic Games, has large irrigated croplands and a fragile ecological environment. The methods of sample selection based on spectral analysis and partitioned extraction of irrigated croplands were proposed with medium-high-resolution images, then the spatiotemporal changes of irrigated and rainfed croplands were explored in Zhangjiakou. The growing season time series curves of normalized difference vegetation index (NDVI) and normalized difference water index (NDWI) based on Landsat images were employed to distinguish irrigated and rainfed croplands in 1987, 2000, and 2015. Through transfer matrix analysis of the three stages of classification results, it was found that the irrigated croplands of Bashang, a semi-arid region, increased sharply (66025 hectares, 7.55%), while the irrigated croplands of Baxia, a mountainous region with small basins and plains, decreased slightly (−8239 hectares, −0.60%). From the perspective of temporal changes, irrigated croplands grew rapidly in the early stage and slowly decline in the later stage, peaking at 377,117 hectares in 2000. According to the analysis, the decline of irrigated croplands was due to a project employed to quit irrigation and return to drought, and further analyses should be conducted in order to realize the rational utilization of water resources and guarantee ecological security. This paper is helpful in supporting extraction methods of irrigated croplands for semi-dry and arid areas, especially when historical samples are lacking. It is also helpful for policy adjustments of agricultural structure of Zhangjiakou and other similar areas.https://ieeexplore.ieee.org/document/9464954/Irrigated croplandsZhangjiakouspatia–temporal changetime series |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Zijuan Zhu Zengxiang Zhang Lijun Zuo Feifei Sun Tianshi Pan Jun Li Xiaoli Zhao Xiao Wang |
spellingShingle |
Zijuan Zhu Zengxiang Zhang Lijun Zuo Feifei Sun Tianshi Pan Jun Li Xiaoli Zhao Xiao Wang The Detecting of Irrigated Croplands Changes in 1987–2015 in Zhangjiakou IEEE Access Irrigated croplands Zhangjiakou spatia–temporal change time series |
author_facet |
Zijuan Zhu Zengxiang Zhang Lijun Zuo Feifei Sun Tianshi Pan Jun Li Xiaoli Zhao Xiao Wang |
author_sort |
Zijuan Zhu |
title |
The Detecting of Irrigated Croplands Changes in 1987–2015 in Zhangjiakou |
title_short |
The Detecting of Irrigated Croplands Changes in 1987–2015 in Zhangjiakou |
title_full |
The Detecting of Irrigated Croplands Changes in 1987–2015 in Zhangjiakou |
title_fullStr |
The Detecting of Irrigated Croplands Changes in 1987–2015 in Zhangjiakou |
title_full_unstemmed |
The Detecting of Irrigated Croplands Changes in 1987–2015 in Zhangjiakou |
title_sort |
detecting of irrigated croplands changes in 1987–2015 in zhangjiakou |
publisher |
IEEE |
series |
IEEE Access |
issn |
2169-3536 |
publishDate |
2021-01-01 |
description |
The distribution of irrigated and rained croplands has a large impact on agricultural production and ecological systems. Zhangjiakou, which is the water conservation area of Jing-jin-ji agglomeration and the host city for the 2022 Winter Olympic Games, has large irrigated croplands and a fragile ecological environment. The methods of sample selection based on spectral analysis and partitioned extraction of irrigated croplands were proposed with medium-high-resolution images, then the spatiotemporal changes of irrigated and rainfed croplands were explored in Zhangjiakou. The growing season time series curves of normalized difference vegetation index (NDVI) and normalized difference water index (NDWI) based on Landsat images were employed to distinguish irrigated and rainfed croplands in 1987, 2000, and 2015. Through transfer matrix analysis of the three stages of classification results, it was found that the irrigated croplands of Bashang, a semi-arid region, increased sharply (66025 hectares, 7.55%), while the irrigated croplands of Baxia, a mountainous region with small basins and plains, decreased slightly (−8239 hectares, −0.60%). From the perspective of temporal changes, irrigated croplands grew rapidly in the early stage and slowly decline in the later stage, peaking at 377,117 hectares in 2000. According to the analysis, the decline of irrigated croplands was due to a project employed to quit irrigation and return to drought, and further analyses should be conducted in order to realize the rational utilization of water resources and guarantee ecological security. This paper is helpful in supporting extraction methods of irrigated croplands for semi-dry and arid areas, especially when historical samples are lacking. It is also helpful for policy adjustments of agricultural structure of Zhangjiakou and other similar areas. |
topic |
Irrigated croplands Zhangjiakou spatia–temporal change time series |
url |
https://ieeexplore.ieee.org/document/9464954/ |
work_keys_str_mv |
AT zijuanzhu thedetectingofirrigatedcroplandschangesin1987x20132015inzhangjiakou AT zengxiangzhang thedetectingofirrigatedcroplandschangesin1987x20132015inzhangjiakou AT lijunzuo thedetectingofirrigatedcroplandschangesin1987x20132015inzhangjiakou AT feifeisun thedetectingofirrigatedcroplandschangesin1987x20132015inzhangjiakou AT tianshipan thedetectingofirrigatedcroplandschangesin1987x20132015inzhangjiakou AT junli thedetectingofirrigatedcroplandschangesin1987x20132015inzhangjiakou AT xiaolizhao thedetectingofirrigatedcroplandschangesin1987x20132015inzhangjiakou AT xiaowang thedetectingofirrigatedcroplandschangesin1987x20132015inzhangjiakou AT zijuanzhu detectingofirrigatedcroplandschangesin1987x20132015inzhangjiakou AT zengxiangzhang detectingofirrigatedcroplandschangesin1987x20132015inzhangjiakou AT lijunzuo detectingofirrigatedcroplandschangesin1987x20132015inzhangjiakou AT feifeisun detectingofirrigatedcroplandschangesin1987x20132015inzhangjiakou AT tianshipan detectingofirrigatedcroplandschangesin1987x20132015inzhangjiakou AT junli detectingofirrigatedcroplandschangesin1987x20132015inzhangjiakou AT xiaolizhao detectingofirrigatedcroplandschangesin1987x20132015inzhangjiakou AT xiaowang detectingofirrigatedcroplandschangesin1987x20132015inzhangjiakou |
_version_ |
1721304771714875392 |