The Lake Habitat Survey for Polish Lakes (LHS_PL) is a method for the hydromorphological investigation of lakes employed for the assessment of the ecological status of surface water bodies in Poland. It was developed based on the British Lake Habitat Survey method. In 2015, after almost a decade of work on the adaptation, the LHS method was finally adjusted to Polish conditions, and since 2016, it has been implemented in the State Environmental Monitoring programme. This paper presents the assumptions and evolution of the method and the approach for determining boundary values for the high/good (H/G) and good/less than good (G/LTG) ecological status classes. The method involves the assessment of the morphological features of the lake and anthropogenic pressures at 10 observation plots as well as the analysis of hydrological alterations and anthropogenic activities within the lake basin and the entire catchment area. The data collected in the field are used to calculate the index of lake hydromorphological alteration, that is, the Lake Habitat Modification Score for Polish Lakes (LHMS_PL). The LHMS_PL values range from 0 to 144, where 0 means no modification and 144 refers to a hydromorphologically highly modified state. The boundary values for the H/G and G/LTG status classes have been determined using the quartile method based on the relationship between hydromorphological modifications of lakes and the condition of the phytoplankton and macrophyte communities therein.

中文翻译：

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波兰湖泊的水文形态评估：制定波兰湖泊的湖泊栖息地调查 (LHS_PL) 方法并确定基于生态的湖泊分类边界值

波兰湖泊湖泊栖息地调查 (LHS_PL) 是一种湖泊水文形态调查方法，用于评估波兰地表水体的生态状况。它是根据英国湖泊栖息地调查方法开发的。2015 年，经过近十年的适应工作，LHS 方法终于适应波兰的条件，并从 2016 年开始在国家环境监测计划中实施。本文介绍了确定高/良好 (H/G) 和良好/欠佳 (G/LTG) 生态状况类别边界值的方法和方法的假设和演变。该方法包括评估湖泊形态特征和 10 个观测点的人为压力，以及分析湖盆和整个流域内的水文变化和人为活动。现场采集的数据用于计算湖泊水文形态变化指数，即波兰湖泊的湖泊栖息地变化评分（LHMS_PL）。LHMS_PL 值的范围为 0 到 144，其中 0 表示没有修改，144 表示高度修饰状态。H/G 和 G/LTG 状态等级的边界值已使用四分位数方法根据湖泊水文形态变化与其中浮游植物和大型植物群落状况之间的关系确定。