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1995 November – 1997 April. Winnellie Drain (Darwin). Pesticides detected: DDT, Chlordane, Dieldrin, Heptachlor

The Quality of Run-Off and Contaminant Loads to Darwin Harbour, 1995 – 2000. A. Padovan (2001)

This study measured the quality and quantity of run-off from catchments representing the major land uses around Darwin Harbour, including urban, light industrial, rural and

undisturbed. Surface water samples (flow weighted composite) were collected from 1 site within each representative catchment area throughout the 1995/96, 1996/97 and 1999/2000 wet seasons. 8 sampling events occurred for the undisturbed catchment. 12 sampling events occurred for the rural catchment. 22 sampling events occurred for the urban catchment. 16 sampling events occurred for the light industrial catchment.

Undisturbed Catchment (Celia Creek) G8150151

No pesticides were detected.

Rural Catchment (Elizabeth River) G8150018

Chlordane: December 1996 – 0.01μg/L

Urban Catchment (Moil drain) G8150231

Dieldrin: Nov/Dec 1995 – 0.02 μg/L, Sept/Oct 1996 – 0.02 μg/L, October 1996 – 0.02 μg/L, Nov/Dec 1996 – 0.01 μg/L, December 1996 – 0.02 μg/L, December 1996 – 0.01 μg/L, December 1996 – 0.02 μg/L, January 1997 – 0.07 μg/L, Jan/Feb 1997 – 0.04 μg/L, February 1997 – 0.02 μg/L, Mar/Apr 1997 – 0.02μg/L, April 1997 – 0.02 μg/L, May/June 1997 – 0.01μg/L.

Triclopyr: January 1997 – 7.0 μg/L Jan/Feb 1997 – 34.0 μg/L

Light Industrial (Winnellie Drain) G8150016

DDT: Nov/Dec 1995 – 0.05μg/L, Dieldrin: Nov/Dec 1995 – 0.02 μg/L, November 1996 – 0.01 μg/L, Dec 96/Jan 97 – 0.02μg/L, Jan/Feb 1997 – 0.01 μg/L, Mar/Apr 1997 – 0.02μg/L. Heptachlor: Nov/Dec 1995 – 0.01μg/L December 1996 – 0.01μg/L

The Quality of Run-Off and Contaminant Loads to Darwin Harbour, 1995 – 2000. A. Padovan (2001)

Sediment Contamination Investigation, 1997. A. Padovan (unpublished data).

Sediment samples were collected from 12 sites within drainage areas throughout the Darwin Harbour Catchment. 1 sampling event occurred for each site in December 1997. Analysis was conducted for 23 pesticides.

Rural Catchment Howard Springs Tip

Dieldrin – 0.02 mg/kg Endosulfan – 0.01 mg/kg

Light Industrial Catchment

Winnellie Drain

Chlordane – 0.01 mg/kg

Dieldrin – 0.03 mg/kg

https://www.lrm.nt.gov.au/__data/assets/pdf_file/0017/13850/pesticide-study-appendices.pdf

This entry was posted in Water Pollution on March 11, 2015 by Anthony.

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