WFD Cycle 2 trac DIN classification

This dataset is a subset of "WFD Classification Status Cycle 2" and contains classification data for Winter Dissolved Inorganic Nitrogen (Winter DIN) in transitional and coastal water bodies. Physico-chemistry, in this case Winter DIN, is a supporting element that underpins the ecological status of a transitional or coastal water body. Data consisting of Winter DIN, salinity and Suspended Particulate Matter (SPM) records are run through the Winter DIN Water Framework Directive (WFD) classification tool. The actual (observed) values of Winter DIN are compared with a predicted value, using a different method for Clear water bodies and Not-Clear water bodies (these categories are based on average SPM). Clear waters are classified using the predicted relationship between average Winter DIN and average salinity in pristine waters; not-clear waters are classified using the predicted relationship between a 99%ile value of Winter DIN and average SPM in pristine waters. The comparison between the observed and expected values of Winter DIN is used to produce a Winter DIN classification (High, Good or Moderate only) of a transitional or coastal water body for WFD purposes. Attribution statement: © Environment Agency copyright and/or database right 2016. All rights reserved.

本数据集系“WFD 分类状态循环 2”的子集，包含过渡性和海岸水体中冬季溶解无机氮（Winter DIN）的分类数据。在此情境下，物理化学性质，即冬季溶解无机氮，是支撑过渡性或海岸水体生态状况的基础要素。数据集包含冬季溶解无机氮、盐度和悬浮颗粒物（SPM）的记录，通过冬季溶解无机氮水框架指令（WFD）分类工具进行处理。实际（观测）的冬季溶解无机氮值与预测值进行比较，针对清澈水体和非清澈水体（这些类别基于平均悬浮颗粒物）采用不同的方法。清澈水体通过预测的原始水体中平均冬季溶解无机氮与平均盐度之间的关系进行分类；非清澈水体则通过预测的原始水体中冬季溶解无机氮的第99百分位数与平均悬浮颗粒物之间的关系进行分类。通过观测值与预期值的比较，可用于生成过渡性或海岸水体的冬季溶解无机氮分类（仅限于高、良好或中等），以满足水框架指令（WFD）的目的。归属声明：© 环境局版权和/或数据库权利2016。保留所有权利。