河流营养物基准制定方法研究进展

Progress in research on river nutrient criteria development methods

  • 摘要: 河流营养物基准是进行河流营养状态综合评估、地表水标准修订的重要依据。系统论述了国内外河流营养物基准制定方法的最新研究进展,提出了河流营养物基准制定的程序及候选指标等,着重阐述了河流营养物基准制定的统计分析法、模型推断法和压力—响应模型法,并对河流营养物基准制定方法的发展趋势进行了展望。通过梳理和比较提出:河流营养物基准制定方法中,统计分析法中的参照河段法最能反映河流的自然状态,但使用历史河流数据和受人类干扰较小的河流数据都会造成河流的过保护,忽略气候变化等自然因素的影响会导致河流的欠保护;模型推断法需要大量数据资料构建表征水体特征的函数模型,其复杂性使该方法的应用存在较大难度;压力—响应模型是目前国内外学者研究的热点,但仍需深入探究在人类活动和气候变化影响下河流中营养物浓度与着生生物、特殊敏感种群之间的响应机制,加强营养物基准制定和河流管理需求的紧密结合。

     

    Abstract: River nutrient criteria is an important basis for the comprehensive evaluation of river nutrient status and the revision of surface water standards. The latest research progress of the methods for the formulation of river nutrient criteria at home and abroad was systematically discussed, and the procedures and candidate indicators for the formulation of river nutrient criteria put forward. The statistical analysis method, model inference method and pressure-response model method for the determination of river nutrient criteria were emphasized, and the development trend of the method for the determination of river nutrient criteria prospected. Through combing and comparison, it was proposed that among the formulation methods of river nutrient criteria, the reference section method in the statistical analysis could best reflect the natural state of the river, but the use of historical river data and the data of the river with less human interference would lead to the over-protection of the river, and the neglect of the impact of natural factors such as climate change would also lead to the under-protection of the river. The model inference method needed a large amount of data to construct a functional model representing the characteristics of water body, and its complexity made the application of this method more difficult. At present, the pressure-response model was a hot topic for scholars at home and abroad, but the response mechanism between nutrient concentration in rivers and biogenic and special sensitive populations under the influence of human activities and climate change still needed to be deeply explored, and the close combination of nutrient criteria formulation and river management needs should be strengthened.

     

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