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首页> 外文期刊>Theoretical and applied climatology >Detecting changes in surface water area of Lake Kyoga sub-basin using remotely sensed imagery in a changing climate
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Detecting changes in surface water area of Lake Kyoga sub-basin using remotely sensed imagery in a changing climate

机译：在气候变化的情况下，使用遥感图像检测京贺湖流域的地表水面积的变化

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摘要

Detection of changes in Earth surface features, for example lakes, is important for understanding the relationships between human and natural phenomena in order to manage better the increasingly scarce natural resources. This work presents a procedure of using modified normalised difference water index (MNDWI) to detect fluctuations of lake surface water area and relate it to a changing climate. The study used radiometrically and geometrically rectified Landsat images for 1986, 1995 and 2010 encompassing the Kyoga Basin lakes of Uganda, in order to investigate the changes in surface water area between the respective years. The standard precipitation index (SPI) and drought severity index (DSI) are applied to show the relationship between variability of surface water area and climate parameters. The present analysis reveals that surface water area fluctuation is linked to rainfall variability. In particular, Lake Kyoga sub-basin lakes experienced an increase in surface water area in 2010 compared to 1986. This work has important implications to water resources management for Lake Kyoga and could be vital to water resource managers across Ugandan lakes.
机译：为了更好地管理日益稀缺的自然资源，检测例如湖泊等地球表面特征的变化对于理解人与自然现象之间的关系非常重要。这项工作提出了一种使用修正的归一化差异水指数（MNDWI）来检测湖泊地表水面积波动并将其与气候变化联系起来的程序。这项研究使用了经过辐射和几何校正的1986年，1995年和2010年的Landsat影像，这些影像涵盖了乌干达的Kyoga盆地湖泊，以调查各年之间地表水面积的变化。应用标准降水指数（SPI）和干旱严重度指数（DSI）来显示地表水面积变化与气候参数之间的关系。目前的分析表明，地表水面积的波动与降雨的变化有关。尤其是，与1986年相比，2010年的京嘉湖次流域湖泊地表水面积有所增加。这项工作对京嘉湖的水资源管理具有重要意义，并且可能对乌干达各湖泊的水资源管理者至关重要。

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  • 来源
    《Theoretical and applied climatology》 |2017年第2期|327-337|共11页
  • 作者

    Nsubuga F. W. N.; Botai Joel O.; Olwoch Jane M.; Rautenbach C. J. deW; Kalumba Ahmed M.; Tsela Philemon; Adeola Abiodun M.; Sentongo Ausi A.; Mearns Kevin F.;

  • 作者单位

    UNISA, Dept Environm Sci, Coll Agr & Environm Sci, Florida Campus,Private Bag X6, ZA-1710 Florida, South Africa;

    Univ Pretoria, Dept Geog Geoinformat & Meteorol, ZA-0002 Pretoria, South Africa;

    South African Natl Space Agcy, Pretoria, South Africa;

    Univ Pretoria, Dept Geog Geoinformat & Meteorol, ZA-0002 Pretoria, South Africa;

    Univ Pretoria, Dept Geog Geoinformat & Meteorol, ZA-0002 Pretoria, South Africa;

    Univ Pretoria, Dept Geog Geoinformat & Meteorol, ZA-0002 Pretoria, South Africa;

    Univ Pretoria, Dept Geog Geoinformat & Meteorol, ZA-0002 Pretoria, South Africa;

    Univ Pretoria, Dept Geog Geoinformat & Meteorol, ZA-0002 Pretoria, South Africa;

    UNISA, Dept Environm Sci, Coll Agr & Environm Sci, Florida Campus,Private Bag X6, ZA-1710 Florida, South Africa;

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