- General - definitions of the quality flags
- General - how accurate is the data?
- General - how can I download the data?
- General - how often is the Hydrometric data updated?
- General - I have an abstraction licence. Can I use this information?
- General - is all the Hydrological data recorded in Greenwich Mean Time (GMT)?
- General - what is a water day?
- General - what is sub-daily data?
- General - what is the difference between checked and unchecked data?
- Groundwater - what does MAOD mean?
- Groundwater - what is borehole depth?
- Groundwater - what is the difference between dipped, logged and telemetered data?
- Groundwater - why are there sometimes differences between dipped and groundwater telemetered data at the same site?
- Rainfall - how do I download historic rainfall data?
- Rivers - is river flow always a function of river level?
- Rivers - there are differences between the data available on the Environment Agency’s website and the National River Flow Archive, which time series should I use?
- Rivers - what is the difference between river level and river flow?
- Rivers - why do river levels or flow sometimes increase or decrease unexpectedly?
- Rivers - why is 15 minute (instantaneous) flow data only available for a small number of stations?
- Rivers - why is Real-Time Flow data only available for a small number of stations?
- Water Quality - how accurate is the data?
- Water Quality - how are the Water Quality sites selected?
- Water Quality - how do I analyse the data?
- Water Quality - how is the data different to the Water Quality Archive data?
- Water Quality - how often do we take readings?
Rivers - why is 15 minute (instantaneous) flow data only available for a small number of stations?
Created: 19 November 2018 Updated: 30 March 2023
The 15 minute data comes directly from our telemetry systems and only a small number of sites are set up to calculate 15 min flow data. For the vast majority of sites the raw level data is transferred to our archiving software which then calculates the flow data.