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River invertebrate classification with RICT2


                                               Ch2 S6 & S7
                                             RIVPACS sampling

                                                                        Ch2 S12 RIVPACS
                                                                        laboratory analysis
                    Ch2 S7.6 Sample
                   environmental data    Ch2 S13 & Ch3 S2.5
                     annual average    Laboratory analytical error      Ch3 S2.4 Calculate
                  (preferably long-term)   Bias from audit               WHPT indices


                                                                         Ch3 S3.2 & S3.3
                                                                         predict EQRs


                     CH3 S3.2 Map
                   environmental data
                                                          RICT2
                                                        software                           Optional for acid
                                                                        Ch3 S4.2 Classify     sites
                                                                            EQRs          Ch3 S6 Acidification
                                                                                            classification
                                                                                            WFD AWICsp
                  Key            User action or data
                  Numbers refer    RICT software
                  to chapters and
                  sections of this                                      Ch3 S4.1  Combine   Combine MINTA and
                  handbook       WFD AWIC software                     ASPT and NTaxa class   WFD AWICsp class =
                                                                        = WFD status class
                           RICT2                      Invertebrate status  MINTA class     Combined class
                      Outside RICT2
                                                                       General degradation  Acidification
                                                                                        (Scotland & Wales only)


                                                                                                   Figure 3.18
                     The UK's river invertebrate status classification and the Chapters (Ch) and Sections (S) in which each step is described in this book


























                      Planorbis albus                  Gammarus pulex                     Caenis pusilla


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