BS EN 16870:2017

European foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Determining the hydromorphological
  modifications of lakes
6 Interpreting and reporting hydromorphological
  modifications
Annex A (normative) - Characterization of lake
        modification based on hydromorphological
        features
Annex B (normative) - Alterations to mean annual
        water level range
Annex C (normative) - Land cover in the lake
        catchment
Annex D (informative) - Case study examples

Gives guidance on determining the degree of modification of lake hydromorphological features described in EN 16039.

This European Standard provides guidance on determining the degree of modification of lake hydromorphological features described in EN 16039. It enables consistent comparisons of hydromorphology between lakes within a country and between different countries in Europe, providing a method for broad based characterization across a wide spectrum of hydromorphological modification. Its primary aim is to assess ‘departure from naturalness’ for a given type of lake as a result of human pressures, and it suggests suitable sources of information that may contribute to characterizing the degree of modification of hydromorphological features. For wholly artificial lakes or reservoirs formed by damming rivers the aim is to assess the extent to which processes approximate to those in comparable natural water bodies. However, this standard does not replace methods that have been developed within particular countries for local assessment and reporting. Decisions on management for individual lakes require expert local knowledge and vary according to lake type.