水生植物腐烂分解作为湖泊生态系统物质循环以及能量流动的关键环节，是维持湖泊生态系统功能的主要过程之一。

As a key aspect of material cycle and energy flow of lake ecosystem, decomposition of lake aquatic plants is one of the main process of maintaining the lake ecosystem functions.

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利用修正后的“流域水资源承载力平衡指数(IWSD)”方法，研究了海河流域1960 - 2030年水生态环境状况的变迁过程。

Using a modified method of Index of water Supply and Demand (IWSD), this paper studies the transitional track of water ecosystem in the Hai River Basin from1960to2030.

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利用修正后的“流域水资源承载力平衡指数(IWSD)”方法，研究了海河流域1960 - 2030年水生态环境状况的变迁过程。

Using a modified method of Index of water Supply and Demand (IWSD), this paper studies the transitional track of water ecosystem in the Hai River Basin from1960to2030.

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