Table 4 P-values from permutation testing differences in interval means and variances for, April–May and JJAS precipitation for Blowering Dam, Burrinjuck Dam, and Tumut; inflows into Blowering Dam and Burrinjuck Dam; Murrumbidgee River heights at Blowering Dam, Burrinjuck Dam, Wagga Wagga and Hay.

From: From the 1990s climate change has decreased cool season catchment precipitation reducing river heights in Australia’s southern Murray-Darling Basin

Catchment location

Precipitation

Net Inflows (% Volume)

Murrumbidgee River level

Apr–May

JJAS

Apr–May

JJAS

Apr–May

JJAS

Mean

Var

Mean

Var

Mean

Var

Mean

Var

Mean

Var

Mean

Var

Blowering Dam

1965–1991 vs 1992–2018

0.007*

0.012*

0.202

0.978

–

–

–

–

–

–

–

–

1976–1997 vs 1998–2019

–

–

–

–

0.0348*

0.301

0.0018*

0.0714*

0.0346*

0.426

0.0024*

0.087*

Burrinjuck Dam

1911–1937 vs 1992–2018

0.102

0.237

0.918

0.422

–

–

–

–

–

–

–

–

1938–1964 vs 1965–1991

0.772

0.644

0.846

0.424

0.145

0.093*

0.058*

0.352

0.357

0.268

0.094

0.605

1938–1964 vs 1992–2018

0.0034*

0.0486*

0.905

0.818

0.566

0.391

0.104

0.0708*

0.476

0.544

0.0706*

0.051*

1965–1991 vs 1992–2018

0.0024*

0.002*

0.761

0.635

0.0676*

0.517

0.003

0.328

0.148

0.606

0.0026*

0.115

Tumut

1884–1910 vs 1938–1964

0.149

0.289

0.463

0.045*

–

–

–

–

–

–

–

–

1938–1964 vs 1965–1991

0.528

0.278

0.308

0.984

–

–

–

–

–

–

–

–

1884–1910 vs 1992–2018

0.285

0.46

0.353

0.008*

–

–

–

–

–

–

–

–

1965–1991 vs 1992–2018

0.0062*

0.0026*

0.227

0.505

–

–

–

–

–

–

–

–

Wagga Wagga

1911–1937 vs 1938–1964

–

–

–

–

–

–

–

–

–

–

0.399

0.55

1911–1937 vs 1992–2018

–

–

–

–

–

–

–

–

–

–

0.0002*

0.013*

1938–1964 vs 1965–1991

–

–

–

–

–

–

–

–

–

–

0.374

0.275

1965–1991 vs 1992–2018

–

–

–

–

–

–

–

–

–

–

0.0044*

0.095*

Hay

1911–1937 vs 1965–1991

–

–

–

–

–

–

–

–

–

–

0.19

0.683

1911–1937 vs 1992–2018

–

–

–

–

–

–

–

–

–

–

0.0068*

0.001*

1938–1964 vs 1965–1991

–

–

–

–

–

–

–

–

–

–

0.309

0.332

1965–1991 vs 1992–2018

–

–

–

–

–

–

–

–

–

–

0.236

0.005*

  1. Significant values (p < 0.10) are italicized with an asterisk. Note that the p-value for each variance test is calculated after one sample has had bias correction in the mean. Note that the p-value for each variance test is calculated after one sample has had bias correction in the mean. Key points to note are highly significant April–May precipitation decreases from 1965 to 1991 to 1992–2018, highly significant recent JJAS net inflows into Blowering and Burrinjuck Dams, and some significant recent decreases in mean or variance of JJAS river heights at Wagga Wagga and Hay.
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