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The project is focussing on three main impact types: morphological degradation, organic pollution and acidification.<\/jats:p><jats:p>This paper presents the outline of the AQEM project with special emphasis on:<\/jats:p><jats:p>\u2013 an overview of assessment systems with benthic invertebrates presently applied in Europe<\/jats:p><jats:p>\u2013 an overview of stream typology approaches in Europe<\/jats:p><jats:p>\u2013 the selection process of the stream types investigated in AQEM<\/jats:p><jats:p>\u2013 the criteria used to select reference sites<\/jats:p><jats:p>\u2013 the design of the sampling programme<\/jats:p><jats:p>\u2013 the microhabitat\u2010based sampling method applied in AQEM<\/jats:p><jats:p>\u2013 the links and possibilities of integration between AQEM and existing assessment systems.<\/jats:p>","DOI":"10.1002\/iroh.200390030","type":"journal-article","created":{"date-parts":[[2003,7,10]],"date-time":"2003-07-10T16:07:46Z","timestamp":1057853266000},"page":"345-361","source":"Crossref","is-referenced-by-count":182,"title":["The Development of a System to Assess the Ecological Quality of Streams Based on Macroinvertebrates \u2013 Design of the Sampling Programme within the AQEM Project"],"prefix":"10.1002","volume":"88","author":[{"given":"Daniel","family":"Hering","sequence":"first","affiliation":[]},{"given":"Andrea","family":"Buffagni","sequence":"additional","affiliation":[]},{"given":"Otto","family":"Moog","sequence":"additional","affiliation":[]},{"given":"Leonard","family":"Sandin","sequence":"additional","affiliation":[]},{"given":"Mario","family":"Sommerh\u00e4user","sequence":"additional","affiliation":[]},{"given":"Ilse","family":"Stubauer","sequence":"additional","affiliation":[]},{"given":"Christian","family":"Feld","sequence":"additional","affiliation":[]},{"given":"Richard","family":"Johnson","sequence":"additional","affiliation":[]},{"given":"Paulo","family":"Pinto","sequence":"additional","affiliation":[]},{"given":"Nikos","family":"Skoulikidis","sequence":"additional","affiliation":[]},{"given":"Piet","family":"Verdonschot","sequence":"additional","affiliation":[]},{"given":"Svetlana","family":"Zahr\u00e1dkov\u00e1","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2003,7,9]]},"reference":[{"key":"e_1_2_1_2_1","unstructured":"Agences de L'Eau 1998: SEQ milieu physique: syst\u00e8me d'\u00e9valuation de la qualit\u00e9 du milieu physique des cours d'eau. \u2013 Les etudes des Agences de l'Eau (testing version 0)."},{"key":"e_1_2_1_3_1","doi-asserted-by":"crossref","first-page":"51","DOI":"10.23818\/limn.04.06","article-title":"Un metodo rapido y simple para evaluar la calidad biologica de las aguas corrientes basado en el de Hellawell (1978)","volume":"4","author":"Alba\u2010Tercedor J.","year":"1988","journal-title":"Limnetica"},{"key":"e_1_2_1_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/0043-1354(83)90188-4"},{"key":"e_1_2_1_5_1","unstructured":"Association Francaise de Normalisation 1985: Essais des eaux. 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