Dynamic Monitoring of Grain for Green Program at Chaoyang City, Liaoning Province Based on Landsat Images During 1985-2020

Shuai Yanmin; Huo Ran; Qu Ge; Shao Congying; Tian Yanjun

doi:10.13961/j.cnki.stbctb.2023.03.015

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Dynamic Monitoring of Grain for Green Program at Chaoyang City, Liaoning Province Based on Landsat Images During 1985-2020

- Dynamic Monitoring of Grain for Green Program at Chaoyang City, Liaoning Province Based on Landsat Images During 1985-2020
- Bulletin of Soiland Water Conservation Vol. 43, Issue 3, Pages: 113-122(2023)
- 作者机构：
  
  1. 辽宁工程技术大学测绘与地理科学学院,辽宁,阜新,123000
  2. 浙江师范大学地理与环境科学学院,浙江,金华,321004
  3. 中国科学院中亚生态与环境研究中心,新疆,乌鲁木齐,830011
  4. 中国科学院大学,北京,100049
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2023.03.015
  CLC： P23;F301.21
- Published：2023
- 稿件说明：
移动端阅览
Shuai Yanmin, Huo Ran, Qu Ge, et al. Dynamic Monitoring of Grain for Green Program at Chaoyang City, Liaoning Province Based on Landsat Images During 1985-2020[J]. Bulletin of Soiland Water Conservation, 2023, 43(3): 113-122.
DOI：

Shuai Yanmin, Huo Ran, Qu Ge, et al. Dynamic Monitoring of Grain for Green Program at Chaoyang City, Liaoning Province Based on Landsat Images During 1985-2020[J]. Bulletin of Soiland Water Conservation, 2023, 43(3): 113-122. DOI： 10.13961/j.cnki.stbctb.2023.03.015.

摘要

[目的

]

分析辽宁省朝阳市退耕还林工程作用下的土地覆被情况，跟踪监测年际间地类变动趋势，探讨退耕还林工程对朝阳市荒山、耕地、林地和草地的影响，为朝阳市土地资源合理规划利用提供科学支撑。[方法

]

基于1985—2020年逐期Landsat影像，利用C5.0算法提取该地区地表覆被时空分布信息，借助土地利用动态度、土地利用转移矩阵等分析36 a间山田林草的动态变化及其驱动因素。[结果

]

①36 a间朝阳市荒山绿化面积达2 745.5 km

，退耕还绿的面积约933 km

，工程成效较为显著。②退耕区和还林区主要分布在坡度＞25°和海拔超过500 m的地区，二者变化主要表现在内部结构的转换，即增加海拔低于500 m和坡度＜25°的耕地比例，基本符合退耕还林政策要求。[结论

]

5个阶段内朝阳市的山田林草在年际间都存在相互转换的情况，相比前3个阶段，后两个阶段在政策实施的加持下“逆过程”现象减少，工程实施方面仍需加强监督，精确理解国家政策和项目技术规程，因地制宜地贯彻有关政策。

Abstract

[Objective] The land cover during the grain for green project (GGP) at Chaoyang City

Liaoning Province were analyzed

and the trend of inter annual land class changes were tracked and monitored

and the impact of the project on barren hills

cultivated land

woodlands

and grasslands at Chaoyang City were discussed

in order to provide scientific support for the rational planning and utilization of land resources at Chaoyang City.[Methods] We used the C5.0 algorithm with Landsat images from 1985 to 2020 to extract the spatial-temporal distribution information of land cover in the region. The dynamic changes and driving factors of forest and grassland in a mountainous area during the 36-year study period were determined by means of land use dynamic attitude and a land use transfer matrix.[Results] ① During the past 36 years

the afforestation area of barren hills at Chaoyang City reached 2 745.5 km2

and the afforestation area of cultivated land was about 933 km2. GGP had achieved remarkable benifits. ② The returned farmland and reforestation areas were mainly located in areas with slopes >25° and altitudes over 500 m. The changes were mainly reflected in the transformation of the internal structure

that is

increasing the proportion of arable land with elevations below 500 m and slopes <25°

basically meeting the requirements of the GGP policy.[Conclusion] The barren hills

cultivated land

forests and grassland of Chaoyang City in the five GGP stages were transformed from one year to another. Compared with the first three GGP stages

the "reverse process" phenomenon in the latter two GGP stages was reduced in response to policy adjustments and implementation. In terms of project implementation

it will still be necessary to strengthen supervision

accurately understand national policies and project technical regulations

and implement policies according to local conditions.

关键词

Keywords

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