Reference Waterbase - Lakes

Prod-ID: DAT-9-en
Created 23 May 2003 Published 23 May 2003 Last modified 15 Dec 2022
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This is an old version, kept for reference only.

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This page was archived on 07 Jul 2014 with reason: Other (New version data-and-maps/data/waterbase-lakes-10 was published)
Reference Waterbase is the EEA's database on the status and quality of Europe's rivers, lakes and groundwater bodies

European data

Reference WATERBASE - Lakes: chemical quality data

The Quality table contains data on nutrients and organic matter measured at the EUROWATERNET lake monitoring stations. Each station has been assigned a unique WATERBASE identifier (WaterbaseID) which can be used to link the Quality data with their respective Stations and Pressure data.

[+] Show table definition (records:   183977)

Median Median concentration over aggregation period float(8) 0
75Percentile 75th Percentile concentration during aggregation period float(8) 0
90Percentile 90th Percentile concentration during aggregation period float(8) 0
StandardDeviation Standard Deviation of concentration during aggregation period float(8) 0
10Percentile 10th Percentile concentration during aggregation period float(8) 0
25Percentile 25th Percentile concentration during aggregation period float(8) 0
Minimum Minimum concentration over aggregation period float(8) 0
Maximum Maximum concentration over aggregation period float(8) 0
Mean Average concentration over aggregation period float(8) 0
NoOfSamples Number of samples in aggregation period int(4) 0
Year Year of measurements range of years available: 1931 - 1939, 1949 - 2001 int(4) 0
PeriodLength Period Length Number of months in aggregation period int(4) 0
AggregationPeriod Period of aggregation Annual = aggregated over whole year, Summer = aggregated over summer months, Winter = aggregated over winter months nvarchar(10) 0
WaterbaseID Unique Waterbase Identifier internally produced, unique identifier used to represent the monitoring station for lakes varchar(22) -1
Determinand Determinand name As defined in Metadata section "Unit" nvarchar(50) 0
Unit Unit of measurement As defined in meta data section "Unit" nvarchar(30) 0


Additional information

The data contained in this database can be accessed through a series of web pages which form part of the EEA Data Service's public web site. Pre-defined applications have been designed to assist the user to extract and analyse the data in a format that is both helpful and meaningful. Reference Waterbase contains timely, reliable and policy-relevant data collected from EEA member countries through the Eurowaternet (EWN) process. EWN selects validated, mostly aggregated, monitoring data from national databases and adds information on the physical characteristics of the water bodies being monitored and on the pressures potentially affecting water quality. Although many countries make their highly aggregated data available over the Internet, the level and form of aggregation often varies from country to country making detailed quantitative comparisons difficult. The added value of Reference Waterbase is that data collected through the EWN process are from statistically stratified monitoring stations and groundwater bodies and are comparable at European level. These data are primarily used in the production of the EEA's indicator-based factsheets. Data disclaimer: The data in Reference Waterbase are sub-samples of national data assembled for the purpose of providing comparable indicators of pressures, state and impact of waters on a Europe-wide scale and the data sets are not intended for assessing compliance with any European Directive or any other legal instrument. Information on the national and sub-national scales should be sought from other sources.



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