You should complete your own quality assurance process before you share your flood hydrology study with the client.įlood hydrology is not an exact science. People who review these models should be different to those who build them. If this is not practical, they should work together throughout the project. Ideally, the hydrologist and hydraulic modeller should be the same person. You should consider the hydrology and hydraulics together - information in one can affect the outcome of the other. You should complete a new flood hydrology study if the existing one is more than 5 years old, to account for new data and methods.ĭo not complete or review your flood hydrology study without considering the extents, needs and assumptions of your hydraulic model. If it’s not good enough or there is no existing study, you’ll need to complete a new one. If the existing study is good enough you can reuse it. If a flood hydrology study exists, you should review it. You should always include a flood hydrology study as part of your modelling project. catchments that join the river along the modelled lengthĪ catchment is an area of land that water drains from before flowing into the fluvial system.inflows to the river from upstream topographic catchments.This refers to the ‘source’ part of the source, pathway, receptor ( SPR) model.įor fluvial systems, examples of ‘sources’ are:
You must have the appropriate knowledge, skills and experience to complete these studies and allow enough time for the task.Ī flood hydrology study estimates flood flows from rainfall and river flow data. These standards give you an introduction to the topic. Hydrological analysis is a complex process with many aspects. You should use this guidance alongside these documents. These standards do not replace the FEH and FEG. You should use the Flood Estimation Handbook ( FEH) and the latest Environment Agency (EA) LIT 11832: Flood Estimation Guidelines ( FEG) to inform your flood flow estimation and hydrological analysis in England. Read all the documents to make sure you have the information you need to start your modelling project. There are 4 more documents that cover this topic. This document is part of the flood modelling standards for river systems.
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