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首页> 外文会议>Asian conference on remote sensing;ACRS >URBANIZATION AND WETLAND ECOSYSTEMS - A CASE STUDY AT SRI JAYAWARDENAPURA KOTTE AND SUBURBS
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URBANIZATION AND WETLAND ECOSYSTEMS - A CASE STUDY AT SRI JAYAWARDENAPURA KOTTE AND SUBURBS

机译：城市化与湿地生态系统-以斯里贾亚瓦德纳普拉库特和郊区为例

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The landuse/ landcover of watersheds are facing frequent changes due to rapid increase of population. Land is converted to settlements or urban lands to fulfill the requirements of increasing population. Though it is an unavoidable phenomenon, the threat is the changes are not in a systematic way to put up with the side effects of such changes. In other words, the developments happen without proper planning and design guidelines. Generally, when land cover changes without proper plans, it affects the hydrology of watersheds, such as distortions of natural waterways, infiltration blocking and increase of runoff. It causes to have frequent flooding in catchments. Further it vanishes the natural flora and fauna from the landscape causing imbalances of the landscape. The main aim of this study was to find out the effect of urbanization on the wetland ecosystems and to show the importance of linking isolated wetlands to have a favorable balance between natural ecosystems and the urbanized landscape. For this study, Sri Jayawardenapura area and suburbs which face frequent flooding during recent years were selected. Aerial photographs and high resolution satellite images were selected for the demarcation of wetland ecosystems of the study area during 1956, 1972, 1999, 2007 and 2016 years. Rapid urbanization without understanding the ecological pattern of the landscape has fragmented the whole wetland network into smaller, scattered wetland patches and it caused to change the natural stream network during the study period. An attempt was taken to show the most feasible way of connecting isolated wetland patches to minimize the flooding events and to have ecological balance to the study area.
机译：由于人口的快速增长，流域的土地利用/土地覆盖面临着频繁的变化。为了满足人口增长的需求，土地被转为定居点或城市土地。尽管这是一种不可避免的现象，但威胁在于，这种变化还没有系统地承受这种变化的副作用。换句话说，如果没有适当的规划和设计指导，就会发生开发过程。通常，如果土地覆盖物没有适当的规划而发生变化，则会影响流域的水文状况，例如自然水道的扭曲，入渗阻塞和径流的增加。它导致流域频繁泛滥。此外，它从景观中消失了自然动植物，造成了景观的不平衡。这项研究的主要目的是找出城市化对湿地生态系统的影响，并表明将孤立的湿地联系起来以在自然生态系统和城市化景观之间取得良好平衡的重要性。对于本研究，选择了斯里兰卡贾亚瓦德纳普拉区和近年来面临频繁洪灾的郊区。在1956年，1972年，1999年，2007年和2016年期间，选择航拍照片和高分辨率卫星图像来划分研究区域的湿地生态系统。在不了解景观生态格局的情况下，快速的城市化进程将整个湿地网络分割成更小的，分散的湿地斑块，并在研究期间改变了自然流网络。试图显示出连接孤立的湿地斑块的最可行方法，以最大程度地减少洪水事件并在研究区域中实现生态平衡。

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