南水北调中线水源区植被指数时空变化分析

doi:10.14088/j.cnki.issn0439-8114.2024.02.031

湖北农业科学 ›› 2024, Vol. 63 ›› Issue (2): 205-210.doi: 10.14088/j.cnki.issn0439-8114.2024.02.031

南水北调中线水源区植被指数时空变化分析

白景锋¹, 张海军¹, 白云帆²

1.南阳师范学院地理科学与旅游学院/河南省环境激光遥感技术与应用工程研究中心/南水北调中线水源区水安全协同创新中心,河南南阳 473061;
2.吉林师范大学博达学院,吉林四平 136000

收稿日期:2022-10-08 出版日期:2024-02-25 发布日期:2024-03-14
作者简介:白景锋（1972-）,男,陕西洛南人,教授,硕士,主要从事区域发展与资源开发研究,（电话）13782125717（电子信箱）nybjf813@163.com。
基金资助:
国家自然科学基金项目（42074094; 41801282）; 南阳师范学院STP项目（2020STP004）

Spatiotemporal variation analysis of vegetation index in water source region of the middle route of South-to-North Water Diversion Project

BAI Jing-feng¹, ZHANG Hai-jun¹, BAI Yun-fan²

1. School of Geographic Science and Tourism,Nanyang Normal University/Engineering Research Center of Environmental Laser Remote Sensing Technology and Application of Henan Province/ Collaborative Innovation Center of Water Security for Water Source Region of Middle Route of South-to-North Water Diversion Project, Nanyang 473061,Henan, China;
2. Boda College of Jilin Normal University,Siping 136000,Jilin, China

Received:2022-10-08 Online:2024-02-25 Published:2024-03-14

摘要/Abstract

摘要： 通过单线性回归（SLOPE）和地理加权回归（GWR）法,用植被指数（NDVI）研究南水北调中线水源区的植被分布变化趋势及机制,为保障水量和水质提供理论支撑。结果表明,2000—2019年水源区NDVI和入库流量呈现同步增长,植被逐渐变好,2007年以前NDVI增长幅度大,2008—2011年处于波动阶段,2012年以后增长幅度减小;NDVI变化最明显的是研究区东北部、西部和丹江口库区周边,这些区域地势相对低平、人口集中,中山和高山区NDVI变化不大;高程、坡度、人口数和城镇化是影响水源区NDVI分布的主要因素,降水、气温和产业比重是次要因素;各因素影响的强度和方向在空间上有异质性,自然地理因素对NDVI影响的最显著范围为高程1 090 m以下、年均降水量980 mm以上的区域,人文地理因素影响的显著范围区是人口密度大、城镇化率高的地区。

关键词: 南水北调中线水源区, NDVI, 时空变化

Abstract: The single linear regression （SLOPE） and geographically weighted regression （GWR） methods were used to study the variation trend and mechanism of vegetation distribution in the water source area of the middle route of the South-to-North Water Diversion Project by vegetation index （NDVI）, so as to provide theoretical support for guaranteeing water quantity and quality. The result showed that the NDVI and the inflow runoff increased synchronously in the water source area from 2000 to 2019. Vegetation gradually became better. The NDVI increase rate was large before 2007, but fluctuated from 2008 to 2011, and decreased after 2012. The NDVI changed obviously in the northeast, west and around the Danjiangkou reservoir area,these areas had low and flat terrain and concentrated population. The NDVI changed little in middle and high mountain areas. The elevation, slope, population and urbanization were the main factors affecting NDVI distribution in the water source region, while precipitation, temperature and industrial proportion were the secondary factors. The intensity and direction of the influencing factors had obvious heterogeneity. The most significant range affected by natural geographical factors on NDVI were the areas with elevation below 1 090 m and average annual precipitation above 980 mm. The significant range affected by human geographical factors were the areas with high population density and high urbanization rate.

Key words: water source region of the middle route of South-to-North Water Diversion Project, NDVI, spatiotemporal variation

中图分类号:

P237
X835

白景锋, 张海军, 白云帆. 南水北调中线水源区植被指数时空变化分析[J]. 湖北农业科学, 2024, 63(2): 205-210.

BAI Jing-feng, ZHANG Hai-jun, BAI Yun-fan. Spatiotemporal variation analysis of vegetation index in water source region of the middle route of South-to-North Water Diversion Project[J]. HUBEI AGRICULTURAL SCIENCES, 2024, 63(2): 205-210.

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南水北调中线水源区植被指数时空变化分析

Spatiotemporal variation analysis of vegetation index in water source region of the middle route of South-to-North Water Diversion Project

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