Developing an integrated long-term monitoring program for Darwin Harbour : Water Quality Pilot Project WP1: Neap Tide Trial
Details:
Title
Developing an integrated long-term monitoring program for Darwin Harbour : Water Quality Pilot Project WP1: Neap Tide Trial,
Other title
Water Quality Pilot Project WP1: Neap Tide Trial,
Creator
Makarynska, Dina,
Collection
E-Publications,
E-Books,
PublicationNT,
10/2019,
Date
2019-03-11,
Location
Darwin Harbour,
Description
The Darwin Harbour Integrated Marine Monitoring and Research Program (IMMRP) is a 40-year
program under the Ichthys Project Voluntary Offsets Agreement between the Northern Territory
Government and INPEX Operations Australia Pty Ltd. The intent of this program is to provide greater
understanding of the biophysical patterns and ecological processes in Darwin Harbour, and to improve
the knowledge of potential risks posed by coastal developments to marine health and resilience in
Darwin Harbour.
The IMMRP comprises of three sub-programs for the themes of water quality, sediment and mangroves.
The water quality sub-program aims to:
1. Improve the scientific rigour and basis of the Northern Territory Department of Environment and
Natural Resources (DENR) Water Quality Monitoring Program (WQMP) and the Darwin Harbour
Region Report Cards
2. Ensure the early detection of change and incremental impact to water quality by quantifying
variability
3. Determine optimal sampling design, method and accuracy
4. Improve our knowledge of processes affecting water quality in Darwin Harbour
5. Provide baseline water quality data to inform future inter-annual monitoring assessments.,
Notes
Made available via the Publications (Legal Deposit) Act 2004 (NT).,
Table of contents
1 Summary -- 2 Introduction -- 2.1 Background -- 2.1.1 Darwin Harbour: physical characteristics -- 2.1.2 Water quality in Darwin Harbour -- 2.1.3 DENR WQMP -- 2.2 Study Objectives -- 3 Method -- 3.1 General approach -- 3.2 Field stations and neap tide dates -- 3.2.1 Measured parameters -- 3.3 Tidal range -- 3.4 Field techniques -- 3.4.1 In-situ field measurements -- 3.4.2 Sample collection and analysis -- 3.5 Data analysis and visualisation -- 3.5.1 Monitoring windows -- 3.5.2 Data visualising techniques -- 3.5.3 Statistical parameters -- 3.5.3.1 Coefficient of variation and mean -- 3.5.3.2 Standard errors -- 3.5.4 Hypothesis testing -- 3.5.4.1 Wilcoxon rank sum test -- 3.5.4.2 Ansari-Bradley test -- 3.5.4.3 Analysis of variance -- 3.5.5 Principal component analysis -- 3.5.6 Generalised linear mixed modelling -- 4 Results and discussion -- 4.1 Explanatory parameters -- 4.1.1 Depth -- 4.1.2 Current speed -- 4.2 Physico-chemical results -- 4.2.1Summary statistics -- 4.2.2 Surface water temperature -- 4.2.2.1 Intra-seasonal variability -- 4.2.2.2 Spatial trend -- 4.2.2.3 Monitoring window assessment -- 4.2.2.3.1 Tidal (flood/ebb) variability -- 4.2.3 Salinity and electrical conductivity -- 4.2.3.1 Intra-seasonal variability -- 4.2.3.2 Spatial trend -- 4.2.3.3 Monitoring window assessment -- 4.2.3.3.1 Tidal (flood/ebb) variability -- 4.2.4 pH -- 4.2.4.1 Intra-seasonal variability -- 4.2.4.2 Spatial trend -- 4.2.4.3 Monitoring window assessment -- 4.2.4.3.1 Tidal (flood/ebb) variability -- 4.2.5 Turbidity -- 4.2.5.1 Intra-seasonal variability -- 4.2.5.2 Spatial trend -- 4.2.5.3 Monitoring window assessment -- 4.2.5.3.1 Tidal (flood/ebb) variability -- 4.2.6 Dissolved oxygen -- 4.2.6.1 Intra-seasonal variability -- 4.2.6.2 Spatial trend -- 4.2.6.3 Monitoring window assessment -- 4.2.6.3.1 Tidal (flood/ebb) variability -- 4.3 Nutrients – Nitrogen and Phosphorus -- 4.3.1 Anthropogenic sources of nutrients in the study area -- 4.3.2 Summary statistics -- 4.3.3 Ammonia -- 4.3.3.1 Intra-seasonal variability --
4.3.3.2 Spaial trend -- 4.3.3.3 Monitoring window assessment -- 4.3.3.3.1 Tidal (flood/ebb) variability -- 4.3.4 Oxides of nitrogen -- 4.3.4.1 Intra-seasonal variability -- 4.3.4.2 Spatial trend -- 4.3.4.3 Monitoring window assessment -- 4.3.4.3.1 Tidal (flood/ebb) variability -- 4.3.5 Total filterable (dissolved) nitrogen -- 4.3.5.1 Intra-seasonal variability -- 4.3.5.2 Spatial trend -- 4.3.5.3 Monitoring window assessment -- 4.3.5.3.1 Tidal (flood/ebb) variability -- 4.3.6 Total nitrogen -- 4.3.6.1 Intra-seasonal variability -- 4.3.6.2 Spatial trend -- 4.3.6.3 Monitoring window assessment -- 4.3.6.3.1 Tidal (flood/ebb) variability -- 4.3.7 Soluble reactive phosphorus as P -- 4.3.7.1 Intra-seasonal variability -- 4.3.7.2 Spatial trend -- 4.3.7.3 Monitoring window assessment -- 4.3.7.3.1 Tidal (flood/ebb) variability -- 4.3.8 Total filterable (dissolved) phosphorus -- 4.3.8.1 Intra-seasonal variability -- 4.3.8.2 Spatial trend -- 4.3.8.3 Monitoring window assessment -- 4.3.8.3.1 Tidal (flood/ebb) variability - 4.3.9 Total phosphorus -- 4.3.9.1Intra-seasonal variability -- 4.3.9.2Spatial trend -- 4.3.9.3 Monitoring window assessment -- 4.3.9.3.1 Tidal (flood/ebb) variability -- 4.4 Phytoplankton biomass -- 4.4.1 Summary statistics -- 4.4.2 Chlorophyll -- 4.4.2.1 Intra-seasonal variability -- 4.4.2.2 Spatial trend -- 4.4.2.3 Monitoring window assessment -- 4.4.2.3.1 Tidal (flood/ebb) variability -- 4.4.3 Euphotic depth -- 4.4.3.1 Intra-seasonal variability -- 4.4.3.2 Spatial trend -- 4.4.3.3 Monitoring window assessment -- 4.4.3.3.1 Tidal (flood/ebb) variability -- 5 Summary of results -- 5.1 Coefficient of variation -- 5.2 Variability trends -- 5.2.1 Physico-chemical parameters -- 5.2.2 Nutrients -- 5.2.3 Algal biomass -- 5.3 Principal component analysis -- 5.3.1 Intra-seasonal variability -- 5.3.2 Spatial variability -- 5.3.3 Windows -- 5.3.4 Windows-tides -- 5.4 Study limitations -- 6 Conclusions and recommendations -- 7 References -- 8 Acknowledgement -- 9 Appendix A: Current speed analyses for nutrients -- 9.1 Ammonia -- 9.2 Oxides of nitrogen -- 9.3 Total dissolved (filterable) nitrogen -- 9.4 Total nitrogen -- 9.5 Soluble reactive phosphorus -- 9.6 Total dissolved (filterable) phosphorus -- 9.7 Total phosphorus -- 10 Appendix B: Generalised linear mixed model results for nutrients -- 10.1 Ammonia -- 10.2 Oxides of nitrogen -- 10.3 Total dissolved (filterable) nitrogen -- 10.4 Total nitrogen -- 10.5 Soluble reactive phosphorus -- 10.6 Total dissolved (filterable) phosphorus -- 10.7 Total phosphate -- 11 Appendix C: Dry season 2017 -- 12 Appendix D: Elizabeth river stream discharge data,