测绘通报 ›› 2021, Vol. 0 ›› Issue (10): 34-38.doi: 10.13474/j.cnki.11-2246.2021.302

• 黄河流域生态保护 • 上一篇    下一篇

黑河中下游植被覆盖度变化遥感监测

胡洁1, 姜成桢1, 杨勇2, 何晓锋3, 李凯4   

  1. 1. 黄河勘测规划设计研究院有限公司, 河南 郑州 450008;
    2. 河南交通规划设计研究院股份有限公司, 河南 郑州 450000;
    3. 杭州市河道与农村水利管理服务中心, 浙江 杭州 310014;
    4. 黄河水利委员会黑河流域管理局, 甘肃 兰州 730030
  • 收稿日期:2021-06-15 修回日期:2021-08-14 出版日期:2021-10-25 发布日期:2021-11-13
  • 作者简介:胡洁(1981-),女,硕士,高级工程师,主要从事地理信息与遥感技术应用工作。E-mail:379673853@qq.com
  • 基金资助:
    高分辨率对地观测系统重大专项(80-H30G03-9001-20/22)

Vegetation coverage change remote sensing monitoring of the middle and lower reaches of the Heihe River

HU Jie1, JIANG Chengzhen1, YANG Yong2, HE Xiaofeng3, LI Kai4   

  1. 1. Yellow River Engineering Consulting Co., Ltd., Zhengzhou 450008, China;
    2. Henan Provincial Communications Planning and Design Institute Co., Ltd., Zhengzhou 450000, China;
    3. Hangzhou River and Rural Water Conservancy Management Service Center, Hangzhou 310014, China;
    4. Heihe Bureau of the Yellow River Conservancy Commission, Lanzhou 730030, China
  • Received:2021-06-15 Revised:2021-08-14 Online:2021-10-25 Published:2021-11-13

摘要: 自2000年国家决策实施水量统一调度以来,黑河中下游生态环境得到好转,但缺乏一个客观公正的评价方法加以验证。本文考虑黑河中下游区域面积大、数据资料缺乏等特点,提出了基于卫星遥感影像提取生长季植被指数计算植被覆盖度(VFC),并对VFC的空间分布特征、面积占比、变化趋势等进行了分析。研究表明,2000—2017年18年间,黑河中下游区域均存在低覆盖植被向其他类型覆盖植被转化现象,高植被覆盖区域面积增加,植被覆盖情况整体趋好。该结论与黑河中下游区域生态环境变化现状相符,证明本文方法可以作为区域生态环境评价的重要方法支撑。

关键词: 卫星遥感, 黑河中下游, 像元二分模型, 植被覆盖度, NDVI

Abstract: After the national decision to conduct the unified water resource regulation in 2000, the ecological environment in the middle and lower reaches of the Heihe River is improved. However, an objective and impartial ecological environment evaluation method is lacked. Because of the large area and little data in the middle and lower reaches of the Heihe River, the method to calculate vegetation fractional coverage (VFC) by extracting normalized difference vegetation index (NDVI) during growing season from satellite remote sensing images is proposed, and the spatial distribution, area proportion and trend of VFC are analysed. This research finds that there is a transformation from low-cover vegetation to other types of vegetation in the middle and lower reaches of the Heihe River during 2000 and 2017. Besides that, the area of high-cover vegetation increases and the overall vegetation coverage is good. The conclusion is consistent with the ecological environment change in the middle and lower reaches of the Heihe River, which proves that the proposed method is reliable to assess the regional ecological environment.

Key words: satellite remote sensing, middle and lower reaches of the Heihe River, dimidiate pixel model, vegetation fractional coverage, normalized difference vegetation index

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