Territory Stories

End of Wet Season Stream Flow Measurements, Roper River, May 2014



End of Wet Season Stream Flow Measurements, Roper River, May 2014


Kerle, Errol; Waugh, Peter; Northern Territory. Department of Land Resource Management


E-Publications; E-Books; PublicationNT; Aug-14




Roper River


Early dry season snapshot measurements were taken on the Roper River to establish water quality and quantity conditions at commencement of baseflow conditions. The snapshot measurements are used to: 1. Refine and calibrate the hydrological model used to assess resource availability and allocations. 2. Better define aquifer recharge/discharge zones along the river, and 3. Provide a dataset of comparable flow and water quality measurements at identical periods in the annual water cycle.


Made available via the Publications (Legal Deposit) Act 2004 (NT)

Table of contents

Summary -- Aim -- Introduction -- Observations -- Discussion -- Conclusion -- Recommendations -- References




End of Wet Season Stream Flow Measurement

Publisher name

Northern Territory Government

Place of publication





24 pages : illustrations, colour maps ; 30 cm.

File type



1743500637; 9781743500637


Attribution International 4.0 (CC BY 4.0)

Copyright owner

Northern Territory Government



Parent handle


Citation address


Page content

8 Water Quality Water quality monitoring involved taking in-situ measurements with a Hydrolab Quanta multiparameter sonde and collection of water samples see Table 1.1. Table 1.1 Hydrolab Quanta Water Samples Electrical Conductivity (EC) pH Dissolved Oxygen (DO) Temperature Turbidity General Parameters Total Nutrients Filtered Nutrients Water quality measurements were performed to the required standards and quality assurance protocol, taking into account site conditions. Probes were calibrated prior to and after the snapshot measurement exercise and results adjusted for sensor drift. In-situ field results are presented in Appendix D. Nutrients. Nutrients occur naturally in rivers, but can also originate from human activities such as fertilizer application, storm runoff from pastoral and agricultural land, and wastewater. Water samples were collected for analysis of soluble (nitrite (NO2), nitrate (NO3), filterable reactive phosphorus(FRP)) and total nutrients (total nitrogen (TN), total phosphorus (TN)), Soluble nutrient samples were filtered through a 0.45 m filter in the field. All samples were refrigerated immediately after collection and frozen prior to sending to the laboratory. Samples were analysed according to APHA standard methods. The results are presented in Appendix E. Rainfall Telemetry rainfall data was collected from monitoring sites in the catchment over the same period as the snapshot exercise to identify if local runoff affected any field measurements.

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