丹江口水库核心水源区土地利用变化特征研究

2021-12-18 15:24:22李明蔚马方正
安徽农业科学 2021年23期

李明蔚 马方正

摘要 丹江口市是南水北調中线工程核心区,其土地利用变化对丹江口水库水质有重要影响。基于丹江口市2007、2012、2017年遥感影像,人机交互解译获取3期土地利用数据,构建0~1 km、>1~13 km、>13~36 km缓冲区,定量和定性方法相结合,综合分析2007—2017年丹江口市土地利用时空变化特征。结果表明:①研究区土地利用类型以林地和农地为主,土地利用变化速度2012—2017年大于2007—2012年;土地利用变化速度由大到小依次是>1~13 km缓冲区、0~1 km缓冲区、>13~36 km缓冲区;农地面积持续减少,建设用地面积持续增长。②土地利用类型转移面积由大到小依次是>1~13 km缓冲区、0~1 km缓冲区、>13~36 km缓冲区,0~1 km缓冲区内,主要是农地转变为林地、草地和水域;>1~13 km缓冲区内,农地、林地和草地相互转变,建设用地持续增加;>13~36 km缓冲区内,主要是农地、林地和草地的转变。③研究区土地利用程度由大到小依次是>1~13 km缓冲区、0~1 km缓冲区、>13~36 km缓冲区;0~1 km缓冲区土地利用程度降低,土地开发利用减弱;>1~13 km缓冲区处于土地利用发展期,土地开发利用逐渐增大;>13~36 km缓冲区土地利用程度变化很小。

关键词 土地利用;变化特征;丹江口市

中图分类号 F 301.24  文献标识码 A

文章编号 0517-6611(2021)23-0092-05

doi:10.3969/j.issn.0517-6611.2021.23.025

Spatio-temporal Variability Characteristics of Land Use in Key Water Source Area of Danjiangkou Reservoir

LI Ming-wei, MA Fang-zheng

(College of Resources and Environmental Science,Hubei University / Hubei Key Laboratory of Region Development and Environment Response, Wuhan,Hubei 430062)

Abstract Danjiangkou City is the central water source area of Middle Route Project of South-to-North Water Diversion in China, the land use change has a significant impact on the water quality of Danjiangkou Reservoir. In order to analyze spatio-temporal LUCC in Danjiangkou City from 2007 to 2017,the authors took the remote sensing images of the year in 2007, 2012 and 2017 as the main data sources,acquired the LUCC information of Danjiangkou City by using man computer interactive image processing methods,constructed 0-1 km, >1-13 km and 13-36 km buffer zones ,and combined method of qualitative and quantitative analysis. The results showed that: ①The main type of land use in the study area is woodland and farmland. The rate of land use change is 2012-2017>2007-2012;the rate of land use change in descending order is >1-13 km buffer zone, 0-1 km buffer zone, >13-36 km buffer zone.In the past 10 years, construction land increased significantly, while the farmland showed a trend of decrease.②The transfer area of land use types in descending order is >1-13 km buffer zone, 0-1 km buffer zone, >13-36 km buffer zone. Within the area of 1-13 km,it is mainly exchanges between farmland, woodland and grassland. Within the range of 13-36km, it is mainly the mutual transformation of farmland, woodland and grassland.③ The degree of land use in the study area in descending order is >1-13 km buffer zone, 0-1 km buffer zone, >13-36 km buffer zone.It is the decline phase of land use in the range of 0-1km,and the land development intensity gradually weakened. It is the development period of land use, and the land development intensity gradually increased.

Key words Land use;Change characteristics;Danjiangkou City

基金项目 国家自然科学基金项目(41471227)。

作者简介 李明蔚(1995—),女,山东日照人,硕士研究生,研究方向:水土资源利用。

收稿日期 2021-03-16

土地利用变化是全球变化中最普遍活跃的地球景观现象之一[1],因而是全球變化研究的热点问题之一。相关研究主要集中在土地利用变化与环境变化之间的联系[2-3],土地利用模型模拟及变化预测[4-5]和驱动因素研究[6-7]等方面。……

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