Changes in extent of open-surface water bodies in China's Yellow River Basin (2000–2020) using Google Earth Engine cloud platform

IF 3.3 2区 地球科学 Q2 ENVIRONMENTAL SCIENCES
Hongye Cao , Ling Han , Liangzhi Li
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引用次数: 6

Abstract

Dynamics of open surface water is of great significance to understand the impacts of global changes and human activities on water resources. However, long-term changes of open-surface water bodies in the Yellow River Basin have remained poorly characterized. In the study, 26,681 high-quality Landsat images were processed using the Google Earth Engine (GEE) cloud platform to study the long-term changes of the open water bodies in the Yellow River Basin from 2000 to 2020. A percentile-based image synthesis method was used to collect training samples. The multi-index water body extraction rule (MIWER) was proposed to rapidly extract surface water bodies. The results show that (1) The MIWER is suitable for long-term and large-scale surface water mapping based on Landsat images; (2) The average area of permanent and seasonal water in the last 20 years is 9062.59 km2 and 6918.83 km2, respectively, accounting for 56.7% and 43.3% of the total surface water in the Yellow River Basin, respectively; (3) From 2000–2020, both permanent and seasonal water in the whole Yellow River Basin and sub-basins have increased. In general, the total open surface water shows an increasing trend with obvious spatial heterogeneity; (4) The changes of surface water in the Yellow River Basin are related to climate change and intensive human activities, but the influencing factors vary in different regions. The findings of this study demonstrate a novel robust, low-cost water extraction method that satisfies the requirements of terrestrial water inundation mapping and management across the Yellow River Basin. The methodology of this study is expected to be extended to global surface waters, providing valuable information for global surface water resource planning and management.

Abstract Image

基于谷歌Earth Engine云平台的2000-2020年中国黄河流域地表水体范围变化
开放地表水的动态变化对认识全球变化和人类活动对水资源的影响具有重要意义。然而,黄河流域开放地表水体的长期变化特征仍不明显。利用Google Earth Engine (GEE)云平台对26681幅高质量Landsat图像进行处理,研究2000 - 2020年黄河流域开放水体的长期变化。采用基于百分位的图像合成方法采集训练样本。为了快速提取地表水体,提出了多指标水体提取规则(MIWER)。结果表明:(1)MIWER适用于基于Landsat影像的长期大尺度地表水制图;(2)近20 a来,黄河流域永久水和季节性水的平均面积分别为9062.59 km2和6918.83 km2,分别占流域地表水总量的56.7%和43.3%;(3) 2000-2020年,黄河流域及其子流域的永久水量和季节性水量均呈增加趋势。总体上,开放地表水总量呈增加趋势,空间异质性明显;(4)黄河流域地表水的变化与气候变化和人类活动强度有关,但不同区域的影响因素不同。本研究结果证明了一种新的可靠、低成本的水提取方法,可以满足黄河流域陆地水淹没测绘和管理的要求。本研究的方法有望推广到全球地表水,为全球地表水资源规划和管理提供有价值的信息。
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来源期刊
Anthropocene
Anthropocene Earth and Planetary Sciences-Earth and Planetary Sciences (miscellaneous)
CiteScore
6.30
自引率
0.00%
发文量
27
审稿时长
102 days
期刊介绍: Anthropocene is an interdisciplinary journal that publishes peer-reviewed works addressing the nature, scale, and extent of interactions that people have with Earth processes and systems. The scope of the journal includes the significance of human activities in altering Earth’s landscapes, oceans, the atmosphere, cryosphere, and ecosystems over a range of time and space scales - from global phenomena over geologic eras to single isolated events - including the linkages, couplings, and feedbacks among physical, chemical, and biological components of Earth systems. The journal also addresses how such alterations can have profound effects on, and implications for, human society. As the scale and pace of human interactions with Earth systems have intensified in recent decades, understanding human-induced alterations in the past and present is critical to our ability to anticipate, mitigate, and adapt to changes in the future. The journal aims to provide a venue to focus research findings, discussions, and debates toward advancing predictive understanding of human interactions with Earth systems - one of the grand challenges of our time.
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