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Title: Analysis of 1995 Survey Data: Phase 1. Unit III
Author: R T Clarke
Author: M T Furse
Author: J Davy-Bowker
Author: Environment Agency
Document Type: Monograph
Annotation: Environment Agency Project ID:EAPRJOUT_1608, Representation ID: 13, Object ID: 1343
Abstract:
i v vii ix 1 1.1 1.2 OBJECTIVES Context Specific Objectives 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17 THE HISTORY OF NATIONAL RIVER QUALITY SURVEYS Context The 1958 Survey The 1970 Survey The 1972 Survey The 1973 Survey The 1976 Survey The Biological Monitoring Working Party The 1980 Survey The Development of RIVPACS The 1985 Survey Development of a System for Classifying the Biological Condition of Sites The 1990 Survey External Quality Audit Internal Analytical Control The 1995 Survey The Development of RIVPACS III+ The 2000 GQA Survey 3 3 3 3 4 4 4 5 6 6 7 7 7 8 9 9 10 12 3 3.1 3.2 3.3 3.4 METHODS General Approach Development of the Questionnaire Circulation of the Questionnaire Presentation and Interpretation of the Responses 13 13 13 14 14 4 4.1 4.2 RESULTS OF THE QUESTIONNAIRE The level of Response The Replies to Each Question 15 15 16 R and D Technical Report E102 1 1 2 iii 5 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 5.10 5.11 5.12 EVALUATION OF QUESTIONNAIRE REPLIES Number of Samples Sampling Methods Sample Sorting Identification and Quantification Internal AQC and External Audit Banding (Grading) of Biological Condition Other Forms of Data Collection and Interpretation Environmental Data Equipment Reporting Survey Design Summary of Recommendations 6 EFFECTS OF SAMPLE ANALYTICAL ERRORS ON THE DETECTION OF CHANGE IN BIOLOGICAL CONDITION 125 Introduction 125 Methods of Assessment 127 Detectable Differences in Relation to Analytical Bias 127 Summary 133 6.1 6.2 6.3 6.4 7 79 79 80 83 86 91 94 100 104 110 110 112 115 7.1 7.2 7.3 7.4 FACTORS ASSOCIATED WITH POOR PERFORMANCE IN SAMPLE PROCESSING Availability of Audited Samples in 1995 Sample Processing Biases in Relation to Site Quality Sample Processing Biases in Relation to Environmental Characteristics of Sites Summary 135 135 135 136 140 8 REFERENCES 141 R and D Technical Report E102 iv LIST OF
Publisher: Environment Agency
Subject Keywords: Water quality surveys; Surveys
Extent: 162
Permalink: http://www.environmentdata.org/archive/ealit:4362
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