680000mECape Wessel 700000mE (Rimbija Island) Low Point 8780000mN WATER RESOURCES OF EAST ARNHEM LAND 660000mE Mort Point Auster Point GROUNDWATER FEATURES: GENERAL FEATURES kilometres 0 2 4 6 8 10 20 30 40 kilometres Groundwater boundary Homeland name BLACK NUMBERED LINES ARE 10000 METRE INTERVALS OF THE AUSTRALIAN MAP GRID, ZONE 53 Bore Country name PROJECTION : UNIVERSAL TRANSVERSE MERCATOR Small spring, discharge up to 10 L/s Place name HORIZONTAL DATUM : AUSTRALIAN GEODETIC DATUM 1966 Stream gauging station - open, closed Jensen Bay GS 8260134 Stream gauging station number Sphink Head Widespread aquifer of poorly consolidated sandstone in the north-east and south; Rainfall station - open, closed limestone in the west and vuggy sandstone on Groote Eylandt. (Gedge Point) Large quantities of groundwater exist, sufficient for irrigation and industrial purposes. Rainfall station number Bore yields typically more than 10 L/s with a maximum of 50 L/s. R 8260053 operated by Water Resources Division 8760000mN High success rate expected. This aquifer provides the base flow for the major streams. Rainfall station number 640000mE (Marchinbar Island) YIRRKALA ANNUAL RAINFALL DR 014502 operated by Bureau of Meteorology 2500 Rainforest (may indicate groundwater discharge) Local aquifers in sand and fractured sandstone, siltstone, dolomite and volcanic rocks. 6 YEAR MOVING AVERAGE Stock and domestic quanities of groundwater are available at selected sites. Road 2000 Bore yields typically range from 0.5 to 5.0 L/s. Moderate success rate expected. Vehicle track (Red Point) Landing ground 1500 Narrow zones of high yielding sand aquifers occuring as valley infill in the north-east; Landing ground - disused thin, lateritised sandstone occurring across a dissected plateau, inthe north-west and Lagoon Bay hard sedimentary rocks and poorly consolidated sandstone in the south. Yields generally 1000 up to 0.5 L/s with moderate to low success rate expected. Occasional higher yields Rainfall (mm) Nip Point with careful bore site selection. 500 Small, isolated aquifers in weathered granite, cemented sandstone, volcanic rocks and 0 sand layers within clay in the north-east and south. Bore yields up to 1.0 L/s. Small supplies with low success rate expected. In the north-west, muds and clays are underlain by a 8740000mn 8760000mn 8780000mn 8740000mN 36/37 37/38 38/39 39/40 40/41 41/42 42/43 43/44 44/45 45/46 46/47 47/48 48/49 49/50 50/51 51/52 52/53 53/54 54/55 55/56 56/57 57/58 58/59 59/60 60/61 61/62 62/63 63/64 64/65 65/66 66/67 67/68 68/69 69/70 70/71 71/72 72/73 73/74 74/75 75/76 76/77 77/78 78/79 79/80 80/81 81/82 82/83 83/84 84/85 85/86 86/87 87/88 88/89 89/90 90/91 91/92 92/93 93/94 94/95 95/96 96/97 97/98 black shale with low to nil groundwater prospects. 620000mE Water Year ARAFURA SEA Indicates saline groundwater, generally underlying saline coastal flats. MINIMUM ANNUAL WATER TABLE LEVEL 20 NOTE : Sand dunes may form a local aquifer. 18 Observation Bore No. 1 (RN 7980) near Yirrkala Creek 16 (Data supplied by Nabalco Pty. Ltd.) 14 12 10 SURFACE WATER FEATURES 8 Surface water divide Level (m AHD) 6 River with a flow of more than 100 L/s at the end of the Dry season 4 ARAFURA SEA River with a flow of between 10 and 100 L/s 2 at the end of the Dry season 0 River with permanent waterholes and flows up to 10 L/s 8720000mN at the end of the Dry season (Stevens Island) 600000mE 70/71 71/72 72/73 73/74 74/75 75/76 76/77 77/78 78/79 79/80 80/81 81/82 82/83 83/84 84/85 85/86 86/87 87/88 88/89 89/90 90/91 91/92 92/93 93/94 94/95 95/96 96/97 97/98 River which is dry at the end of the Dry season Water Year (Raragala Island) Lake, perennial (Djeergaree Island) Lake, intermittent 4000 Burgunngura Island Waterhole River flows recorded from gauging station at: Swamp or marsh (Truant Island) Angurugu Creek 3000 Mangrove Drysdale Island Habgood River Subject to inundation Goyder River Yirrkala Creek 2000 (Jirrgari Island) Flow (L/s) Note: - 66/67 means the water year September 1966 to August 1967. 1000 Graham Island - predicted values based on correlation with Yirrkala Creek and shown as broken line. 8700000mN (Bumaga Island) 0 580000mE (Wigram Island) 66/67 67/68 68/69 69/70 70/71 71/72 72/73 73/74 74/75 75/76 76/77 77/78 78/79 79/80 80/81 81/82 82/83 83/84 84/85 85/86 86/87 87/88 88/89 89/90 90/91 91/92 92/93 93/94 94/95 95/96 96/97 97/98 Water Year (Warnawi Island) (Elcho Island) 480000mE 500000mE 520000mE 540000mE 560000mE (Cape Wilberforce) (Alger Island) (Astell Island) Herald Islet (Pobassoo Island) (Mooroongga Island) Warnga Point Cape Stewart Point Napier False Point Bosanquet Island (Elcho Island) ARAFURA SEA ARAFURA SEA (Crocodile Abbott Island (Darbada Island) DR014504 CADELL STRAIGHT Island) (Yabooma Island) STRAIGHTS Point Bristow (Inglis Island) Veronica Island (Boojiragi Island) Worrmi Point Flinders Point Milingimbi (Mardaraingup (Gananggarngur Jigaimara Point Malga Point Garalja Island Island NALWARUNG Island) Island) Ngurubudanamirri PERA CHANNEL DR014402 East Bremer Islet Bay BUCKINGHAM BAY R8240001 Bremer Island (Probable Island) 8660000mn 8680000mn 8700000mn 8720000mn Howard Island Mallison Island (East Woody Island) NHULUNBUY (West Woody Island) Point Guy (Gwakura Island) R 8260010 DR 014512 Castlereagh Bay DR 014513 DR 014512 Rekala Island ULUNDURWI Rhodes Point BAY GS 8260134 DR 014502 Banyan Island Everett (Strath Island) R 8260055 Island GS 8260054 Melville Bay (Miles Island) R 8260004 DR 014509 DR 014508 Rocky Bay (Hardy Island) ARNHEM BAY GS 8260001 GS 8260053 R 8260053 R 8260052 R 8260061 R 8260001 GS 8260052 GULARRI GAPU Dalywoi Bay GS 8260219 (Cape (Low Island) Arnhem) Ramungir Bay R 8260060 GS 8260006 R 9010003 Ganumbali Island GS 9010003 G8250003 Port DR014515 Bradshaw R 9010005 G8260007 (Gwapilina Point) Binanangoi Point ROAD ARNHEM CENTRAL Mount Alexander Wanyanmera Point F R E D E R I C K H I L L S GULF Grays Bay OF CARPENTARIA Caledon Bay Point Alexander 8580000mN 8600000mN 8620000mN 8640000mN 8660000mN 8680000mN GS 9010002 (Bridgland Island) (McNamara Island) GS 9010001 Mount Caledon (Dudly Island) G8250002 ARNHEM ROAD CENTRAL Trial Bay Cape Grey Guyuwiri Point Bald Point Myaoola Bay Bagbiringula Point Wardarlea Bay Grindall Bay 8540000mN 8560000mN Jalma Bay Mount Grindall Point Arrowsmith Gumbula Bay Point Blane (Round Hill Island) Mount Parsons (Gooninnah Island) (Fowler Island) Cape Shield Mount Fleming Mount Ramsay BLUE (Cool Yal You Ma Island) Marrinan Island Meringa Island (Isle Woodah) (Nicol Island) (Morgan MUD Island) BAY 8500000mn 8520000mn 8540000mn 8560000mn 8580000mn 8600000mn 8620000mn 8640000mn Amagbirra Island Mount Ranken Wedge Rock (Burney Island) Hawknest Island (North Point Island) Cape Barrow (Chasm Island) Nimaguwa Island (Hawk Island) (Lane Island) Milyema Island Bennet Bay (Jagged Head) (Bustard Island) Amagiladjura Point Finch Island (Bickerton Island) North Bay Alyinga Island (Winchelsea Island) Scott Point Northwest Bay Port Langdon Yarranya Island (McComb Point) Hand Islet Woody Island Thompson Bay South Bay (Connexion Island) Little Lagoon Alexander gs n Hill ri p S us o r e m u N s g n ri p s 8460000mN 8480000mN 8500000mN 8520000mN s u Mount Leane ro me (Central Hill) u N R 9290120 Bluff Hill DR 014506 GS 9290006 GULF Mount Poiziers Lilyangumanja Point 480000mE OF (Groote Eylandt) CARPENTARIA GS 9290211 500000mE Lugadamanja Point (Castle Rock) 8440000mN GS 9290005 Angwarikba Point INDEX TO 1 : 250 000 Alyilyakba Point MAP SHEETS (Dalumbu Bay) JUNCTION BAY WESSEL ISLANDS TRUANT ISLAND SC5314 SC5315 SC5316 MAP LOCALITY Rantyirrity Point Sandy Hill Minintirri Island (Tasman Point) GOVE MILINGIMBI ARNHEM BAY Amamarrity Island SD5302 SD5303 SD5304 NORTHERN (South Point) TERRITORY MOUNT WESTERN QUEENSLAND MARUMBA BLUE MUD BAY PORT LANGDON AUSTRALIA SD5306 SD5307 SD5308 SOUTH AUSTRALIA NEW SOUTH Nungkanangka Island 8420000mn 8440000mn 8460000mn 8480000mn 8420000mN WALES (Inamalamandja Point) 520000mE (Cape Beatrice) URAPUNGA ROPER RIVER CAPE BEATRICE VICTORIA SD5310 SD5311 SD5312 TASMANIA GULF OF CARPENTARIA 600000mE 620000mE 640000mE 660000mE 680000mE 700000mE Map compiled by G. Prowse, U. Zaar, S. Tickell and I. Matthews. NATURAL RESOURCES HOMELANDS Project co-ordination by P. Jolly. Nyinpinti Point NATIONAL NUMBULWAR Sandy Island HOMELANDS Cartography by L. J. Fritz, Resource Assessment Mapping Unit, LANDCARE COUNCIL ASSOC using Microstation graphic applications. PROGRAM INCORP Microstation Design File: East_Arnhem_Wrs_500k_m53 Northern Territory Government LAYNHAPUY 8400000mN Plot File: East_Arnhem_Wrs_500k 8400000mN ASSOCIATION Geology modified from maps of the Northern Territory Geological Survey, Department of Mines and Energy, and the Australian Edward Island Geological Survey Organisation, Canberra, Australian Capitol Territory. discrepancies may occur. If there any concerns please contact Wilipili Island RAMINGINING AUSLIG TOPO-250K data supplied through the Land Information 540000mE GUMATJ Division, Department of Lands, Planning and Environment, HOMELANDS Northern Territory ASSOCIATION RESOURCE Published and available from: Wuyagiba Beach INCORPORATED Natural Resources Division CENTRE Department of Lands, Planning and Environment MILINGIMBI HOMELANDS Goyder Centre NGADUNGGAY HOMELAND MARTHAKAL HOMELAND GULIN GULIN ABORIGINAL 25 Chung Wah Terrace, Palmerston RESOURCE CENTRE & OUTSTATIONS RESOURCE CENTRE Northern Territory, July 1999 ABORIGINAL CORPORATION RESOURCE CENTRE RESOURCE ASSOCIATION INC Low Rock 560000mE 580000mE.