Characteristics of Land Use Structure Change in Beiluo River Basin During 1970-2019 Based on Google Erath Engine

Zou Yadong; He Liang; Zhang Xiaoping; Ma Baoyou; Wang Haojia; Wang Miaoqian; Xue Fan; He Jie

doi:10.13961/j.cnki.stbctb.2021.06.028

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Characteristics of Land Use Structure Change in Beiluo River Basin During 1970-2019 Based on Google Erath Engine

- Characteristics of Land Use Structure Change in Beiluo River Basin During 1970-2019 Based on Google Erath Engine
- Bulletin of Soiland Water Conservation Vol. 41, Issue 6, Pages: 209-219(2021)
- 作者机构：
  
  1. 西北农林科技大学水土保持研究所黄土高原土壤侵蚀与干旱农业国家重点实验室, 陕西杨凌,712100
  2. 中国科学院水利部水土保持研究所, 陕西杨凌,712100
  3. 延安市黄龙国有林管理局,陕西,延安,71600
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2021.06.028
  CLC： X87;TP79;F301.1
- Published：2021
- 稿件说明：
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Zou Yadong, He Liang, Zhang Xiaoping, et al. Characteristics of Land Use Structure Change in Beiluo River Basin During 1970-2019 Based on Google Erath Engine[J]. Bulletin of Soiland Water Conservation, 2021, 41(6): 209-219.
DOI：

Zou Yadong, He Liang, Zhang Xiaoping, et al. Characteristics of Land Use Structure Change in Beiluo River Basin During 1970-2019 Based on Google Erath Engine[J]. Bulletin of Soiland Water Conservation, 2021, 41(6): 209-219. DOI： 10.13961/j.cnki.stbctb.2021.06.028.

摘要

[目的] 探究北洛河流域土地利用时空变化及其驱动力，为该区土地资源优化、环境质量改善和水沙生态要素变化分析等提供科学依据。[方法] 基于GEE平台整理和处理北洛河流域1970—2019年间6期遥感影像数据，从时间变化、动态度、转移方向和空间分布等角度分析流域土地利用变化特征，并对其驱动因素进行探讨。[结果] 研究时段内，北洛河流域土地利用类型以耕地、林地和草地为主，数量结构从2000年前的1：1.1：0.6变化到2000年后的1：2.7：0.7。1970—2019年研究区耕地、草地和水域的减少率分别为16.6%，6.7%和0.1%，林地和建设用地的面积增加率为19.9%和1.3%。流域耕地和草地斑块趋于分散且简单化，林地斑块趋于聚集和复杂化。土地利用转移主要以耕地转林地、耕地转建设用地和草地转林地为主。流域土地利用综合动态度先增后减，2000—2010年间达最大。流域中，上游丘陵沟壑区土地利用结构变化最为显著，其次为中游的甘泉、宜君、华池、合水等县。[结论] 国家政策的演变、社会经济发展和人口增长决定了土地利用变化的方向和程度，自然因素为长期辅助影响因素。

Abstract

[Objective] The spatial-temporal changes and associated driving forces of land use in the Beiluo River basin were investigated in order to provide a scientific basis for the optimization of land resources

the improvement of environmental quality and further exploration on runoff-sediment dynamics in the area.[Methods] Based on the google erath engine (GEE) platform

we sorted and processed six-phase remote sensing images acquired in 1970-2019 for the Beiluo River basin. The characteristics of land use change in the basin were captured from the perspectives of temporal variation

dynamics attitude

transfer direction and spatial structure

and the associated driving factors were explored.[Results] During the study period

the land use types in the Beiluo River basin were mainly woodland

cultivated land and grassland

and the quantitative structure changed from 1:1.1:0.6 before 2000 to 1:2.7:0.7 after 2000. During 1970-2019

cultivated land

grassland and water area in the basin decreased by 16.6%

6.7% and 0.1%

respectively

while contrarily woodland and construction land have increased by 19.9% and 1.3%

respectively. The patches of cultivated land and grassland in the basin tended to be dispersed and simple

while the woodland tended to be aggregated and complicated. Land use transfer mainly occurred as the conversion of cultivated land to woodland and construction land

and the conversion of grassland to woodland. The comprehensive land use dynamic attitude of the basin increased firstly and then decreased

reaching a peak during 2000-2010. In the basin

the upstream hilly and ravine area saw the most significant change of land use structure

followed by Ganquan

Yijun

Huachi and Heshui counties in the middle reaches.[Conclusion] The evolution of national policies

socio-economic development and population growth determine the direction and extent of land use change

and natural factors are long-term auxiliary influencing factors.

关键词

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