River Health in the New South Wales Lower North Coast, Hunter and Central Coast Catchments

A report of AusRivAS assessments 1994 - 1999
Grant Hose and Eren Turak
Environment Protection Agency, 2004
ISBN 0 642 55099 9 ISSN 1447-1280

Hunt03 - Allyn River at Halton

Site Condition Summary
Sampling Data and Assessments
Site report cards

Site Condition Summary

This site was within grazing country in the Hunter Valley. Water quality was generally good with most nutrient concentrations below reporting limits. Visual assessments of instream habitat indicated some disturbance which may be attributed to cattle accessing the river. Native bank vegetation had mostly been cleared and replaced by exotic species. Stream shading was low which may facilitate algal growth.

AusRivAS assessments indicated macroinvertebrate communities sampled at this site were similar to those expected from reference sites (band A). This was the case for both riffle and edge habitats. Instances where O/E values fell into band B most likely reflected environmental factors or chance omission of some predicted taxa.

Location Map

Location Details
Map Name	Allynbrook 9233-3-N
Map Zone	56
Map Scale	1:25000
Easting	359900
Northing	6423400
Distance from source (m)	33420
Elevation (m asl)	110
Average Annual Rainfall (mm)	850

Single Season Assessments

Edge
	Spring '94	Autumn '95	Spring '95	Autumn '96	Autumn '97	Spring '97	Autumn '98	Spring '98	Autumn '99	Spring '99
	11-Oct-94	3-May-95	18-Oct-95	1-Apr-96	17-Apr-97	22-Oct-97	6-Apr-98	14-Oct-98	4-May-99	16-Dec-99
O/E Taxa	0.79	0.87	1.25	0.85	0.98	1.07	1.13	0.93	0.99	0.73
Band	B	A	X	A	A	A	A	A	A	B
O/ E SIGNAL	0.87	1.11	0.94	1.03	0.98	0.93	0.90	0.95	1.00	1.01

Riffle
	Autumn '95	Autumn '96	Autumn '97	Spring '98	Autumn '99	Spring '99
	3-May-95	1-Apr-96	17-Apr-97	14-Oct-98	4-May-99	16-Dec-99
O/E Taxa	0.87	0.94	0.94	0.89	0.94	0.77
Band	A	A	A	A	A	B
O/ E SIGNAL	1.04	1.02	0.99	0.94	0.99	0.90

Combined Season Assessments

Edge
Seasons	SPR94AUT95	AUT95SPR95	SPR95AUT96	AUT97SPR97	SPR97AUT98	AUT98SPR98	SPR98AUT99	AUT99SPR99
Model	Eastern	Eastern	Eastern	Eastern	Eastern	Eastern	Eastern	Eastern
O/E Taxa	0.90	1.10	1.05	1.03	1.00	1.05	0.96	0.98
Band	A	A	A	A	A	A	A	A
O/ E SIGNAL	0.98	0.96	0.92	0.92	0.92	0.95	0.97	0.95

Riffle
Seasons	AUT98SPR98	SPR98AUT99	AUT99SPR99
O/E Taxa	0.96	1.06	1.01
Band	A	A	A
O/ E SIGNAL	0.99	1.02	1.04

Taxa Collected

X= Taxa Predicted & Collected, O = Taxa Predicted & NOT Collected, + = Taxa Collected & NOT Predicted

Edge
			Spring '94	Autumn '95	Spring '95	Autumn '96	Autumn '97	Spring '97	Autumn '98	Spring '98	Autumn '99	Spring '99
Phylum	Class/Order	Family	11-Oct-94	3-May-95	18-Oct-95	1-Apr-96	17-Apr-97	22-Oct-97	6-Apr-98	14-Oct-98	4-May-99	16-Dec-99
Annelida	Hirudinea					+					+
Annelida	Oligochaeta		+			+						+
Arachnida	Hydracarina		X	X	X	X	X	X	X	X	O	X
Crustacea	Amphipoda	Ceinidae	+
Crustacea	Decapoda	Atyidae	X	X	X	X	X	X	X	X	X	X
Crustacea	Ostracoda	Ostracoda				+		+	+			+
Insecta	Coleoptera	Dytiscidae	X	X	X	X	X	X	X	X	X	X
Insecta	Coleoptera	Elmidae	X	X	X	X	X	X	X	X	O	X
Insecta	Coleoptera	Gyrinidae	O							O
Insecta	Coleoptera	Hydraenidae	+	+	+	+
Insecta	Coleoptera	Hydrophilidae	X	X	X	X	O	X	X	X	X	O
Insecta	Coleoptera	Psephenidae	+		+						+	+
Insecta	Coleoptera	Staphylinidae			+
Insecta	Collembola	Collembola			+
Insecta	Diptera	Ceratopogonidae				+		+		+
Insecta	Diptera	Chironomidae	+		+
Insecta	Diptera	Chironominae	O	O	X	O	X	X	X	X	X	X
Insecta	Diptera	Dixidae								O
Insecta	Diptera	Orthocladiinae	X	O	X	X	O	X	X	X	O	O
Insecta	Diptera	Simuliidae			+
Insecta	Diptera	Syrphidae						+
Insecta	Diptera	Tanypodinae	X	X	X	O	X	X	X	X	X	X
Insecta	Diptera	Tipulidae			+
Insecta	Ephemeroptera	Baetidae	O	X	X	O	X	O	X	X	X	O
Insecta	Ephemeroptera	Caenidae	X	O	X	X	X	X	X	+	X	X
Insecta	Ephemeroptera	Leptophlebiidae	O	X	X	X	X	X	O	X	X	X
Insecta	Hemiptera	Corixidae	X	X	X	X	X	X	X	+	X	X
Insecta	Hemiptera	Gerridae	O	O	X	O	X	O	X	O	O	O
Insecta	Hemiptera	Hebridae							+
Insecta	Hemiptera	Naucoridae							+
Insecta	Hemiptera	Notonectidae	+	+	+		+	+	+	O		+
Insecta	Hemiptera	Veliidae	O	X	X	X	X	X	X	X	X	O
Insecta	Lepidoptera	Pyralidae							+
Insecta	Megaloptera	Sialidae				+						+
Insecta	Odonata	Aeshnidae						+
Insecta	Odonata	Coenagrionidae	+	+		+		+	+	+		+
Insecta	Odonata	Corduliidae			+							+
Insecta	Odonata	Gomphidae	+	O		O	O	O	X		X	O
Insecta	Odonata	Isostictidae	+									+
Insecta	Odonata	Libellulidae		O	+	O	X	X	X	+	X	O
Insecta	Odonata	Protoneuridae	+					+		+		+
Insecta	Plecoptera	Eustheniidae								+
Insecta	Trichoptera	Atriplectididae										+
Insecta	Trichoptera	Calamoceratidae	O	X	O	X	O	O	O	O	X	O
Insecta	Trichoptera	Conoesucidae					+	+
Insecta	Trichoptera	Helicopsychidae			+		+	+	+		+	+
Insecta	Trichoptera	Hydropsychidae			+
Insecta	Trichoptera	Hydroptilidae	+		+			X	+	+		X
Insecta	Trichoptera	Leptoceridae	X	X	X	X	X	X	X	X	X	X
Mollusca	Bivalvia	Corbiculidae										+
Mollusca	Gastropoda	Lymnaeidae			+			+	+		+
Mollusca	Gastropoda	Physidae	+		+		+	+	+	+		O
Mollusca	Gastropoda	Planorbidae							+
Platyhelminthes	Turbellaria	Dugesiidae	+	+	+	+	+	+		+	+

X= Taxa Predicted & Collected, O = Taxa Predicted & NOT Collected, + = Taxa Collected & NOT Predicted

Riffle
			Autumn '95	Autumn '96	Autumn '97	Spring '98	Autumn '99	Spring '99
Phylum	Class/Order	Family	3-May-95	1-Apr-96	17-Apr-97	14-Oct-98	4-May-99	16-Dec-99
Annelida	Oligochaeta		X	O	O	O	O	O
Arachnida	Hydracarina		X	X	O	X	X	X
Crustacea	Decapoda	Atyidae	X	X	X	+	X
Insecta	Coleoptera	Dytiscidae				+
Insecta	Coleoptera	Elmidae	X	X	X	X	X	X
Insecta	Coleoptera	Hydrophilidae						+
Insecta	Coleoptera	Psephenidae	X	X	X	O	X	X
Insecta	Coleoptera	Scirtidae				O		O
Insecta	Diptera	Athericidae						+
Insecta	Diptera	Ceratopogonidae		+		+
Insecta	Diptera	Chironominae	O	X	X	X	X	X
Insecta	Diptera	Muscidae				+
Insecta	Diptera	Orthocladiinae	X	X	X	X	X	X
Insecta	Diptera	Simuliidae	O	O	X	O	X	O
Insecta	Diptera	Tanypodinae	O	O	X	X	O	O
Insecta	Diptera	Tipulidae		+	+	X		X
Insecta	Ephemeroptera	Baetidae	X	X	X	X	X	X
Insecta	Ephemeroptera	Caenidae	X	X	X	X	X	X
Insecta	Ephemeroptera	Leptophlebiidae	X	X	X	O	O	X
Insecta	Hemiptera	Corixidae
Insecta	Hemiptera	Veliidae	+
Insecta	Lepidoptera	Pyralidae			+		+
Insecta	Megaloptera	Corydalidae	X	X	X	X	X	X
Insecta	Odonata	Aeshnidae	O	X	O	O	X	O
Insecta	Odonata	Amphipterygidae			+		+
Insecta	Odonata	Corduliidae
Insecta	Odonata	Gomphidae				X	+	X
Insecta	Odonata	Libellulidae		+	+	+	+	+
Insecta	Odonata	Megapodagrionidae		+
Insecta	Odonata	Odonata	+
Insecta	Plecoptera	Gripopterygidae	X	X	X	X	X	O
Insecta	Trichoptera	Calamoceratidae	+					+
Insecta	Trichoptera	Calocidae						+
Insecta	Trichoptera	Conoesucidae			+	+		+
Insecta	Trichoptera	Helicopsychidae		+	+			+
Insecta	Trichoptera	Hydrobiosidae	X	O	O	X	X	O
Insecta	Trichoptera	Hydropsychidae	X	X	X	X	X	X
Insecta	Trichoptera	Hydroptilidae				+	+
Insecta	Trichoptera	Leptoceridae	X	O	O	X	O	O
Insecta	Trichoptera	Philopotamidae	O	X	X	O	X	O
Mollusca	Bivalvia	Corbiculidae				+
Mollusca	Gastropoda	Ancylidae				+	+
Mollusca	Gastropoda	Physidae		+		+	+	+
Mollusca	Gastropoda	Planorbidae				+
Platyhelminthes	Turbellaria	Dugesiidae	O	O	O		O

Water Quality Data

	Spring '94	Autumn '95	Spring '95	Autumn '96	Autumn '97	Spring '97	Autumn '98	Spring '98	Autumn '99	Spring '99
Variable	11-Oct-94	3-May-95	18-Oct-95	1-Apr-96	17-Apr-97	22-Oct-97	6-Apr-98	14-Oct-98	4-May-99	16-Dec-99
Water Temperature (°C)	22.6	18	17.5	23.2	16.8	18.5	20.6	22.1	17.2	26.4
Conductivity (µS/Cm)	314	242	205	156	30	150	175	284	130	195
Dissolved Oxygen (mg/L)	9.3	7.66	7.2	9.8	9.3	14.1	10	8.9	9.6	8.9
Alkalinity (mg CaCO₃ /L)	98	68	50	80	91	54	61	75	40	12.5
pH	8.57	8.49	7.7	8.11	7.88	9.25	8.37	8.79	8	8.09
Turbidity	1.6	2.3	0.5	5.9	1.9	1.9	2.5	0	1.5	0
Turbidity (NTU)	33		15	23	<12	19	<12	<12	<12	21
Low Total Phosphorus (µg/L)								4	9	12
NOx Nitrogen (µg/L)	30		20	<10	<10	<10	6	3	4	12
Total Kjeldahl Nitrogen (µg/L)	0.48		<0.3	<0.3	<0.3	<0.3	0.39	<0.3	<0.3	<0.3
Ammonia								9	8	15
Nitrate								2	3	12
Nitrite								<1	<1	<1

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