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Impacts of Land-Use Changes on the Lakes across the Yangtze Floodplain in China

机译：土地利用变化对中国长江泛滥平原湖泊的影响

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摘要

The middle and lower Yangtze (MLY) floodplain has one of the most densely distributed lake clusters in China but suffered from long-term lake reclamation and wetland degradation due to intensive cultivation, fish rearing, and urban expansion over the past several decades. As a land-use alternation to support human life, the conversion of lakes to cropland, aquaculture ponds, and human settlements provides essential ecosystem goods at the expense of the deterioration of wetland environment. To quantify the driving factors of lake changes, we investigated the land-use transitions from lakes (≥1 km~2) between 1975 and 2015 using Landsat remote sensing data. We found that the dramatic decline in lake area (a net decrease of 13.8 ± 1.4%) over the four decades was largely attributed to human-induced transformation from lakes to cropland, fish ponds, and built-up areas, accounting for 34.6%, 24.2%, and 2.5% of the total area reduction, respectively. The remaining loss, associated with vegetation (37.3%) and bare land (1.4%) and coming mainly from China's two largest freshwater lakes (Poyang and Dongting), can be explained by climate variation, sediment deposition, and hydrological regulation. These findings shed new light on the quantitative impacts of human activities and climate variation on lake changes and provide a scientific foundation for wetland management decision-making.
机译：长江中下游（MLY）泛滥平原是中国分布最密集的湖泊群之一，但由于过去几十年的集约耕作，养鱼和城市扩张，长期遭受湖泊填海和湿地退化的困扰。作为支持人类生活的土地利用交替方案，将湖泊转变为农田，水产养殖池塘和人类住区提供了必不可少的生态系统产品，但以湿地环境的恶化为代价。为了量化湖泊变化的驱动因素，我们使用Landsat遥感数据调查了1975年至2015年之间湖泊（≥1km〜2）的土地利用转变。我们发现，在过去的40年中，湖区的急剧下降（净下降13.8±1.4％）在很大程度上归因于人为导致的从湖泊到农田，鱼塘和建成区的转变，占34.6％，分别减少了总面积的24.2％和2.5％。剩下的与植被（37.3％）和光秃秃的土地（1.4％）有关的损失主要来自中国的两个最大的淡水湖（and阳和洞庭），可以通过气候变化，沉积物沉积和水文调节来解释。这些发现为人类活动和气候变化对湖泊变化的定量影响提供了新的思路，并为湿地管理决策提供了科学依据。

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  • 来源
    《Environmental Science & Technology》 |2017年第7期|3669-3677|共9页
  • 作者

    Cong Xie; Xin Huang; Hongqiang Mu; and Wei Yin;

  • 作者单位

    State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, People's Republic of China;

    School of Remote Sensing and Information Engineering, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, People's Republic of China,State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, People's Republic of China;

    Yangtze Valley Water Resources Protection Bureau, Changjiang Water Resources Commission, Wuhan 430010, People's Republic of China;

    Yangtze River Water Resources Protection Science Institute, Wuhan 430051, People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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