Reflections off the water

Lakes

There are a number of ephemeral lakes along the Darling River. Menindee Lakes are the most likely to have water, but even these will mostly dry out with prolonged dry spells.

The following is a digest of key statistics of the major lakes including the Menindee Lakes.

Lake Listing

Location Storage Area Perimeter Inflows Outflow
Menindee Lakes
Wintlow Lake 0.5 sq km 2.8 km Five Mile Creek
Malta Lake 3.0 sq km 6.6 km Malta Creek
Balaka Lake 12.6 sq km 13 km
Lake Bijiji 9.3 sq km 14.5 km Bijijie Creek Bijijie Creek
Lake Wetherell 192.6 GL 30.5 sq km 75 km Darling River Darling River, Lake Pamamaroo
Tandure Lake 21.1 sq km 19.1 km Darling River
Lake Pamamaroo 277.7 GL 37.8 sq km 32.5 km Darling River Darling River, Copi Hollow
Copi Hollow 3.0 sq km 8.5 km Lake Pamamaroo Lake Menindee
Lake Menindee 629.5 GL 156.7 sq km 53.5 km Copi Hollow Little Menindee Creek (Darling River), Cawndilla Creek (Lake Cawndilla)
Lake Speculation 4.4 sq km 19.2 km
Lake Eurobilli 2.1 sq km 10.2 km
Lake Cawndilla 631.1 GL 93.1 sq km 54.0 km Cawndilla Creek (Lake Menindee) Cawndilla Channel
Lake Spectacle 4.1 sq km 0.8 km
Darling River
Emu Lake 11.3 sq km 14.9 km Billabong Creek
Still dry on the 2021-12-09 (15 GL/day), filling 2021-12-24 (17.5 GL/day), mostly fill 2022-01-23.
Cuthero Lake 2.2 sq km 9.7 km
First signs of water flowing up from the Darling around 2022-07-07 and lower was mostly fill 2022-07-27.
Yartla Lake 10.8 sq km 17.5 km
First signs of water flowing up from the Darling on 2022-01-03. Cloudy period but mostly fill 2022-02-02. Indications that the upstream anabranches start flowing 2022-07-27.

Flow Notes

I've used Sentinel-Hub to try and estimate the key flows for various unregulated lakes and creeks.

The upper Menindee Lakes are difficult to predict start to fill flows with delays from Wilcannia readings and only height data on Lake Wetherell. I've used a 5 day delay to estimate the time it takes the flow from Wilcania to reach Lake Wetherell.

Wintlow Lake

The lake will fill via flow down Five Mile Creek or from a flow from Malta Creek feeding up into Five Mile Creek.

The lake hasn't filled in other recent floods around 30 GL/day, and there wasn't even any indication of the swamp below middle lake getting any flow at 29.2 GL/day.

The only time in recent history was with the major flood in Dec 2022. Assuming a flow of 35 GL/day, the last time it filled was likely in 1990.

Date River Flow* Lake Height Storage
2022-11-24 30.8 GL/day 60.59 m 53.5 GL (27.8 %)
2022-12-14 33.0 GL/day 60.42 m 47.3 GL (24.5%)
2022-12-24 36.9 GL/day 61.03 m 74.2 GL (38.5%)
2023-01-01 38.3 GL/day 62.49 m 194.2 GL (101%)

* Wilcania minus 5 days
Lake Wetherell

Satellite Imagery
Floodplain filling
2022-11-24
Satellite Imagery
Middle lake fill
2022-12-14
Satellite Imagery
Wintlow fill
2022-12-24
Satellite Imagery
Flood peak
2023-01-03

Five Mile Creek Start to Flow

The access road down to Boolkamena appears to cause a blockbank on Five Mile Creek but flows around 30 GL/day appear to connect both ends of the creek.

The image was captured on 2022-02-17, with an estimated flow of 29,000 ML/day and no flow was seen at the access road.

Satellite Imagery
  1. Five Mile Creek
  2. Boolkamena Access Road
  3. Malta Creek
  4. Unnamed "middle" lake.
  5. Wintlow Lake
  6. Malta Lake

Malta Lake

Looking at a flow of around 15 GL/day to 20 GL/day fill the lake, 25 GL/day to connect directly to Balaka Lake. Recent flow events saw:

2020-04-03
Slight inflow started at 12 GL/day, but never filled.
2024-05-27
Slight inflow started at 12.2 GL/day, and half filled. Peak was 12.7 GL/day.
2021-04-28
Slight inflow had started and was filled by 2021-05-18. Cloudy period with est. flow of 20 GL/day.
Date Flow
2021-04-18 8,816 ML/day
2021-04-28 16,720 ML/day
2021-05-13 23,770 ML/day
2021-05-18 25,420 ML/day
Satellite Imagery
No flow
2021-04-18
Satellite Imagery
Creek filling
2021-04-28
Satellite Imagery
Lake filling
2021-05-13
Satellite Imagery
Lake fill
2021-05-18

Balaka, Bijiji and Tandure

Lake Tandure can almost be considered an extension of Lake Wetherell and makes for an enjoyable detour on the way down even if you only poke your nose in. Balaka and Bijiji are usually separated fully from Lake Wetherell.

Lake Tandure will fill alongside Lake Wetherell, although when fully dry it appears that Tandure will start to fill before Wetherell. Both Balaka and Bijiji will start to fill around 10 GL/day, faster in higher flows. When Lake Wetherell nears capacity, the floodplains will effectively interconnect all of the lakes.

Date Flow
2020-03-09 0 ML/day
2020-03-14 8,400 ML/day
2020-03-19 12,300 ML/day
2020-03-24 13,100 ML/day
2020-04-03 10,200 ML/day
2020-04-13 10,500 ML/day
Satellite Imagery
All dry
2020-03-09
Satellite Imagery
Tandure filling
2020-03-14
Satellite Imagery
Tandure fill
2020-03-19
Satellite Imagery
Balaka and Bijiji filling
2020-03-24
Satellite Imagery
Balaka fill
2020-04-03
Satellite Imagery
Bijiji mostly fill
2020-04-13

Emu Lake

Emu Lake seems to start filling around 5 m, mostly fill at 6 m and fill at 7 m, as measured at Weir 32.

These are based on just two high flow events.

Date Dry/No inflow Filling Mostly Fill Fill
Dec 2021 4.2 m 15 GL/day 5.85 m 17.5 GL/day 5.96 m 18 GL/day N/A
2021-12-09 2021-12-24 2022-01-08
May 2022 4.67 m 13.3 GL/day 4.91 m 14.1 GL/day 6.42 m 20 GL/day 7.12 m 30 GL/day
2022-05-03 2022-05-08 2022-06-07 2022-11-24
Satellite Imagery
Emu Lake dry
2021-12-09
Satellite Imagery
Emu Lake filling
2021-12-24
Satellite Imagery
Emu Lake mostly fill
2022-01-08

Cuthero Lake

A single flood event suggests a flow of 19.0 GL/day and height of 8.8 m is needed as measured at the Darling Anabranch.

Date Dry/No inflow Bottom filling Bottom fill Top fill
Dec 2021 8.55 m 17.8 GL/day 8.77 m 18.8 GL/day 8.83 m 19.0 GL/day 8.87 m 19.2 GL/day
2022-06-07 2022-06-27 2022-07-17 2022-07-27

Yartla Lake

Two recent flood events suggest that the lake starts to fill around the 8.0 m mark with a flow of around 16 GL/day is needed as measured at the Darling Anabranch.

Date No inflow Swamp fill Inflow Fill
Dec 2021 5.69 m 7.9 GL/day 7.95 m 15.4 GL/day 8.20 m 16.4 GL/day 8.35 m 17.0 GL/day
2021-12-09 2021-12-24 2022-01-03 2022-02-02
May 2022 7.12 m 12.4 GL/day 7.79 m 14.8 GL/day 8.11 m 16.1 GL/day N/A
2022-05-03 2022-05-18 2022-05-23 already fill

There are indications that the upstream anabranches between Cuthero Lake and Yartla Lake started flowing around 2022-07-27.

Map

Map of all of the main lakes of the Darling River including the Menindee Lakes.

  • Wintlow Lake
  • Malta Lake
  • Balaka Lake
  • Lake Bijiji
  • Copi Hollow
  • Tandure Lake
  • Lake Pamamaroo
  • Lake Speculation
  • Lake Wetherell
  • Lake Menindee
  • Lake Spectacle
  • Lake Eurobilli
  • Emu Lake
  • Lake Cawndilla
  • Cuthero Lake
  • Yartla Lake