Gosford City Council Historical Water Quality Review & Analysis

CONTENTS
II
3.1.1.5 Salinity 3-6
3.1.1.6 Dissolved Oxygen 3-7
3.1.2 Chemical Parameters 3-8
3.1.2.1 Ammonia 3-8
3.1.2.2 Oxidised Nitrogen 3-9
3.1.2.3 Total Nitrogen 3-10
3.1.2.4 Orthophosphate 3-11
3.1.2.5 Total Phosphorus 3-12
3.1.3 Compound Water Quality Index 3-13
3.2 Water Quality Datasondes 3-14
3.2.1 Brisbane Water (Koolewong) 3-14
3.2.2 Avoca Lagoon 3-16
3.2.3 Cockrone Lagoon 3-17
3.3 Historical Water Quality Results 3-18
3.3.1 Chemical Parameters 3-18
3.3.2 Bacteria 3-19
3.3.3 Algae 3-19
3.3.3.1 Algal counts 3-19
3.3.3.2 Chlorophyll-a 3-20
3.3.4 Metals 3-21
4 FUTURE DIRECTIONS FOR WATER QUALITY / ENVIRONMENTAL HEALTH
MONITORING 4-1
4.1 Discussion of Previous Monitoring Programs 4-1
4.2 The Notion of ‘Environmental Health’ 4-1
4.2.1 Coastal CRC EHMP 4-1
4.2.1.1 Water quality 4-2
4.2.1.2 Seagrass 4-3
4.2.1.3 Sewage 4-3
4.2.1.4 Report cards 4-3
4.3 Review of ANZECC Monitoring Guidelines 4-5
4.3.1 Introduction 4-5
4.3.2 Setting Objectives 4-5
4.3.3 Study Design 4-7
4.3.4 Field Sampling Program 4-8
4.3.5 Laboratory Analysis 4-9
4.3.6 Data Analysis and interpretation 4-10
4.3.7 Reporting 4-11
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