Use of hypolimnetic oxygen depletion rate as a trophic state index for lakes
Use of hypolimnetic oxygen depletion rate as a trophic state index for lakes
复制标题
DOI：
10.1029/wr015i006p01463
复制
发表时间：
1979-12
影响因子：
5.4
通讯作者：
W. W. Walker-W.
中科院分区：
文献类型：
--
作者：
W. W. Walker-W.
在过去10年中，随着评估富营养化问题的相对简单的经验方法的发展，湖泊水质管理规划的可行性大大增加。这些与磷负荷，水文，和形态等传统的营养状态指数，磷浓度，叶绿素a浓度和透明度。与使用这些方法有关的困难之一是，与有益使用有关的水质标准通常不符合“营养状态”的主观定义。本文试图通过将磷、叶绿素a和/或透明度的测量与下湖溶解氧相关联来改进现有的方法，这与现有的水质标准直接相关，特别是对于渔业管理。Carlson（1977）营养状态指数的一个修正版本总结了夏季、表层水测量的总磷、叶绿素a和透明度之间的关系。从30个湖泊的数据的基础上，该指数被证明是高度相关的面积hypolimnetic氧耗率时，平均深度的明显影响也被考虑在内（R2 = 0.91）。86个湖泊的独立数据库上的经验模型的测试表明，该方法可以用来预测基于湖泊形态和营养指数的氧状态。该方法提供了磷质量平衡模型和现有的溶解氧水质标准之间的联系。
The feasibility of lake water quality management planning has been greatly increased over the past 10 years with the development of relatively simple, empirical methods for assessing eutrophication problems. These relate phosphorus loading, hydrology, and morphometry to such traditional trophic state indices as phosphorus concentration, chlorophyll-a concentration, and transparency. One of the difficulties associated with use of these methods is that water quality criteria, as related to beneficial use, do not generally correspond to subjective definitions of ‘trophic state.’ This paper attempts to improve upon existing methods by relating measures of phosphorus, chlorophyll-a, and/or transparency to hypolimnetic dissolved oxygen, which is of direct relevance to existing water quality standards, particularly for fisheries management. A modified version of Carlson's (1977) trophic state index summarizes relationships among summer, epilimnetic measurements of total phosphorus, chlorophyll-a, and transparency. On the basis of data from 30 lakes this index is shown to be highly correlated with areal hypolimnetic oxygen depletion rate when the apparent effects of mean depth are also taken into account (R2 = 0.91). Tests of the empirical model on a separate data base of 86 lakes indicate that the approach can be used to predict oxygen status based upon lake morphometry and trophic index. The methodology provides a link between phosphorus mass balance models and existing water quality criteria for dissolved oxygen.