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An Integrated Approach for Assessing Aquatic Ecological Carrying Capacity: A Case Study of Wujin District in the Tai Lake Basin, China

机译:水生生态承载力综合评价方法-以太湖流域武进区为例

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Aquatic ecological carrying capacity is an effective method for analyzing sustainable development in regional water management. In this paper, an integrated approach is employed for assessing the aquatic ecological carrying capacity of Wujin District in the Tai Lake Basin, China. An indicator system is established considering social and economic development as well as ecological resilience perspectives. While calculating the ecological index, the normalized difference vegetation index (NDVI) is extracted from Moderate Resolution Imaging Spectroradiometer (MODIS) time-series images, followed by spatial and temporal analysis of vegetation cover. Finally, multi-index assessment of aquatic ecological carrying capacity is carried out for the period 2000 to 2008, including both static and dynamic variables. The results reveal that aquatic ecological carrying capacity presents a slight upward trend in the past decade and the intensity of human activities still exceeded the aquatic ecological carrying capacity in 2008. In terms of human activities, population has decreased, GDP has quadrupled, and fertilizer application and industrial wastewater discharge have declined greatly in the past decade. The indicators representing aquatic ecosystem conditions have the lowest scores, which are primarily attributed to the water eutrophication problem. Yet the terrestrial ecosystem is assessed to be in better condition since topographic backgrounds and landscape diversity are at higher levels. Based on the work carried out, it is suggested that pollutant emission be controlled to improve water quality and agricultural development around Ge Lake (the largest lake in Wujin District) be reduced.
机译:水生生态承载力是分析区域水资源管理可持续发展的有效方法。本文采用一种综合的方法对太湖流域武进区的水生生态承载力进行了评估。建立了考虑社会和经济发展以及生态恢复观点的指标体系。在计算生态指数时,从中分辨率成像光谱仪(MODIS)的时间序列图像中提取归一化差异植被指数(NDVI),然后进行植被覆盖的时空分析。最后,对2000年至2008年的水生生态承载力进行了多指标评估,包括静态和动态变量。结果表明,过去十年水生生态承载力略有上升趋势,人类活动强度仍超过2008年的水生生态承载力。在人类活动方面,人口减少,国内生产总值翻两番,肥料使用在过去的十年中,工业废水的排放量大大减少了。代表水生生态系统状况的指标得分最低,这主要归因于水体富营养化问题。然而,由于地形背景和景观多样性处于较高水平,因此陆地生态系统处于更好的状态。根据所做的工作,建议控制污染物排放以改善水质,并减少葛湖(武进区最大的湖泊)周围的农业发展。

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