Fitzroy River (WA)

Surface Water & Rainfall Dynamics Report

Calendar recurrence of annual peak and trough timing was established (peak Kuiper p = 0.001; trough Kuiper p = 0.001; alpha = 0.05). Dynamic hydrological-year boundaries are detected per year.

Seasonal

hydrological regime
assessed seasonal strength

Peak and trough recur

seasonality evidence
Kuiper p-values: peak=0.001; trough=0.001. Both reject 12-month uniformity (alpha = 0.05).

Per-Year Detection

analytical route
how hydro-year boundaries were derived

0.0% zero-water months

observability
0 whole-zero years; 11/21 years support both peak and trough timing

hydrological years
Jan 2005 to Dec 2025; recurrence alpha=0.05; 19 detectable years, 19 timing-eligible years, 21 qualifying years.

12.0

mean cycle length
months per hydro-year

February

Typical peak month
maximum of mean monthly extent

November

Typical trough month
minimum of mean monthly extent

well-observed years
out of 21 total years; data/window quality (selection_support >= 0.8)

point-identifiable boundary years
out of 21 total years; timing resolved to an exact date, not an interval or unresolved extremum

wet events
episodes above the record's 75th percentile

8 mo

longest low-extent spell
longest continuous run below baseline

years without a wet event
out of 21 usable years

6.2%

average invalid/cloud cover
mean across 252 months of observations

Monthly Surface Water Extent

Seasonal Context

Wet Event Characterisation

A wet event begins once extent climbs above 0.1% (baseline 0.1% plus a margin sized to this record's own month-to-month noise) and continues until it falls back below 0.1% -- hysteresis, so a wobbling recession is not counted as several separate floods. Events shorter than 1 month(s) are dropped; episodes closer than 1 month(s) apart are merged into one.

Low-Extent Spells

A low-extent spell is a run of at least 2 consecutive months below 0.1% (baseline 0.1% minus a margin sized to the same noise scale), counted independently of wet events -- a catchment that never floods can still have long low-extent spells. About 32.9% of this record's months sit below that line, so a spell describes a sustained below-typical period, not an absence of water.

Yearly Cycle Details

Expand individual hydrological years to view monthly breakdowns and detailed statistics.

▶HY 2025Dec 2024 – Nov 2025

Cycle: 12.0 mosAmplitude: 0.23%LOW CONFIDENCE

Peak Wet MonthJanuary 2025 – March 20250.27% extent

Mid-Dry TargetJuly 20250.08% extent

End Dry MonthOctober 2025 – November 20250.03% extent

Low confidence: Boundary is provisional and was not confirmed.

Month	Phase	Water Extent	Invalid/Cloud Cover	Key Event
Dec 2024	Rising	0.07%	4.65%
Jan 2025	Rising	0.26%	3.77%	Wet Interval
Feb 2025	Rising	0.27%	6.24%	Wet Peak (interval)
Mar 2025	Receding	0.25%	2.82%	Wet Interval
Apr 2025	Receding	0.23%	2.82%
May 2025	Receding	0.12%	2.82%
Jun 2025	Receding	0.10%	2.82%
Jul 2025	Receding	0.08%	2.83%	Mid Dry
Aug 2025	Receding	0.06%	2.82%
Sep 2025	Receding	0.05%	2.82%
Oct 2025	Receding	0.04%	2.82%	Dry Interval
Nov 2025	Receding	0.03%	3.13%	Dry End (interval)

▶HY 2024Feb 2024 – Nov 2024

Cycle: 10.0 mosAmplitude: 0.41%MEDIUM CONFIDENCE

Peak Wet MonthMarch 20240.44% extent

Mid-Dry TargetJuly 20240.07% extent

End Dry MonthAugust 2024 – November 20240.04% extent

Medium confidence: Boundary is provisional and was not confirmed.

Month	Phase	Water Extent	Invalid/Cloud Cover	Key Event
Feb 2024	Rising	0.20%	2.82%
Mar 2024	Rising	0.44%	2.95%	Wet Peak
Apr 2024	Receding	0.17%	2.81%
May 2024	Receding	0.11%	2.82%
Jun 2024	Receding	0.09%	2.82%
Jul 2024	Receding	0.07%	2.82%	Mid Dry
Aug 2024	Receding	0.05%	2.82%	Dry Interval
Sep 2024	Receding	0.04%	2.82%	Dry Interval
Oct 2024	Receding	0.04%	2.81%	Dry Interval
Nov 2024	Receding	0.04%	5.82%	Dry End (broad)

▶HY 2023Dec 2022 – Jan 2024

Cycle: 14.0 mosAmplitude: 1.32%HIGH CONFIDENCE

Peak Wet MonthJanuary 20231.36% extent

Mid-Dry TargetJuly 20230.14% extent

End Dry MonthSeptember 2023 – January 20240.04% extent

Month	Phase	Water Extent	Invalid/Cloud Cover	Key Event
Dec 2022	Rising	0.29%	2.83%
Jan 2023	Rising	1.36%	7.07%	Wet Peak
Feb 2023	Receding	0.89%	3.01%
Mar 2023	Receding	0.42%	2.82%
Apr 2023	Receding	0.32%	3.64%
May 2023	Receding	0.16%	2.83%
Jun 2023	Receding	0.13%	2.92%
Jul 2023	Receding	0.14%	2.82%	Mid Dry
Aug 2023	Receding	0.10%	2.82%
Sep 2023	Receding	0.06%	2.82%	Dry Interval
Oct 2023	Receding	0.05%	2.82%	Dry Interval
Nov 2023	Receding	0.04%	3.44%	Dry Interval
Dec 2023	Receding	0.04%	2.86%	Dry Interval
Jan 2024	Receding	0.04%	5.46%	Dry End (broad)

▶HY 2022Nov 2021 – Nov 2022

Cycle: 13.0 mosAmplitude: 0.51%HIGH CONFIDENCE

Peak Wet MonthFebruary 20220.55% extent

Mid-Dry TargetJuly 20220.06% extent

End Dry MonthJuly 2022 – November 20220.05% extent

Month	Phase	Water Extent	Invalid/Cloud Cover	Key Event
Nov 2021	Rising	0.05%	2.77%
Dec 2021	Rising	0.05%	3.13%
Jan 2022	Rising	0.07%	4.33%
Feb 2022	Rising	0.55%	2.82%	Wet Peak
Mar 2022	Receding	0.27%	8.98%
Apr 2022	Receding	0.16%	2.82%
May 2022	Receding	0.09%	2.82%
Jun 2022	Receding	0.08%	2.82%
Jul 2022	Receding	0.06%	2.86%	Mid Dry
Aug 2022	Receding	0.06%	2.82%	Dry Interval
Sep 2022	Receding	0.05%	2.82%	Dry Interval
Oct 2022	Receding	0.05%	2.82%	Dry Interval
Nov 2022	Receding	0.05%	2.82%	Dry End (broad)

▶HY 2021Nov 2020 – Oct 2021

Cycle: 12.0 mosAmplitude: 0.97%MEDIUM CONFIDENCE

Peak Wet MonthMarch 20211.02% extent

Mid-Dry TargetJune 20210.11% extent

End Dry MonthSeptember 2021 – October 20210.05% extent

Medium confidence: Boundary is provisional and was not confirmed.

Month	Phase	Water Extent	Invalid/Cloud Cover	Key Event
Nov 2020	Rising	0.05%	12.04%
Dec 2020	Rising	0.40%	13.92%
Jan 2021	Rising	0.25%	3.46%
Feb 2021	Rising	0.99%	9.54%
Mar 2021	Rising	1.02%	4.03%	Wet Peak
Apr 2021	Receding	0.25%	2.79%
May 2021	Receding	0.15%	2.77%
Jun 2021	Receding	0.11%	2.79%	Mid Dry
Jul 2021	Receding	0.10%	2.78%
Aug 2021	Receding	0.08%	2.78%
Sep 2021	Receding	0.06%	2.78%	Dry Interval
Oct 2021	Receding	0.05%	2.77%	Dry End (interval)

▶HY 2020Jan 2020 – Oct 2020

Cycle: 10.0 mosAmplitude: 0.35%MEDIUM CONFIDENCE

Peak Wet MonthMarch 20200.38% extent

Mid-Dry TargetJune 20200.10% extent

End Dry MonthSeptember 2020 – October 20200.03% extent

Medium confidence: Boundary is provisional and was not confirmed.

Month	Phase	Water Extent	Invalid/Cloud Cover	Key Event
Jan 2020	Rising	0.16%	7.21%
Feb 2020	Rising	0.19%	5.06%
Mar 2020	Rising	0.38%	2.80%	Wet Peak
Apr 2020	Receding	0.17%	2.78%
May 2020	Receding	0.11%	2.79%
Jun 2020	Receding	0.10%	2.80%	Mid Dry
Jul 2020	Receding	0.07%	2.79%
Aug 2020	Receding	0.06%	2.78%
Sep 2020	Receding	0.05%	2.77%	Dry Interval
Oct 2020	Receding	0.03%	2.90%	Dry End (interval)

▶HY 2019Jan 2019 – Dec 2019

Cycle: 12.0 mosAmplitude: 0.06%HIGH CONFIDENCE

Peak Wet MonthFebruary 20190.09% extent

Mid-Dry TargetJuly 20190.04% extent

End Dry MonthNovember 2019 – December 20190.03% extent

Month	Phase	Water Extent	Invalid/Cloud Cover	Key Event
Jan 2019	Rising	0.07%	3.31%
Feb 2019	Rising	0.09%	4.16%	Wet Peak
Mar 2019	Receding	0.07%	3.09%
Apr 2019	Receding	0.06%	3.07%
May 2019	Receding	0.05%	2.78%
Jun 2019	Receding	0.05%	2.81%
Jul 2019	Receding	0.04%	2.80%	Mid Dry
Aug 2019	Receding	0.04%	2.80%
Sep 2019	Receding	0.04%	2.87%
Oct 2019	Receding	0.04%	2.78%
Nov 2019	Receding	0.03%	2.78%	Dry Interval
Dec 2019	Receding	0.03%	3.29%	Dry End (interval)

▶HY 2018Dec 2017 – Dec 2018

Cycle: 13.0 mosAmplitude: 0.70%HIGH CONFIDENCE

Peak Wet MonthFebruary 20180.73% extent

Mid-Dry TargetJuly 20180.08% extent

End Dry MonthNovember 2018 – December 20180.04% extent

Month	Phase	Water Extent	Invalid/Cloud Cover	Key Event
Dec 2017	Rising	0.09%	3.44%
Jan 2018	Rising	0.29%	16.76%
Feb 2018	Rising	0.73%	7.55%	Wet Peak
Mar 2018	Receding	0.22%	2.79%
Apr 2018	Receding	0.16%	2.78%
May 2018	Receding	0.11%	2.78%
Jun 2018	Receding	0.09%	2.78%
Jul 2018	Receding	0.08%	2.78%	Mid Dry
Aug 2018	Receding	0.06%	2.78%
Sep 2018	Receding	0.05%	2.78%
Oct 2018	Receding	0.04%	2.79%
Nov 2018	Receding	0.04%	2.90%	Dry Interval
Dec 2018	Receding	0.04%	2.79%	Dry End (interval)

▶HY 2017Dec 2016 – Nov 2017

Cycle: 12.0 mosAmplitude: 2.33%HIGH CONFIDENCE

Peak Wet MonthFebruary 20172.37% extent

Mid-Dry TargetJuly 20170.11% extent

End Dry MonthSeptember 2017 – November 20170.04% extent

Month	Phase	Water Extent	Invalid/Cloud Cover	Key Event
Dec 2016	Rising	0.06%	11.73%
Jan 2017	Rising	1.36%	9.24%
Feb 2017	Rising	2.37%	15.26%	Wet Peak
Mar 2017	Receding	0.60%	4.82%
Apr 2017	Receding	0.27%	2.97%
May 2017	Receding	0.18%	2.78%
Jun 2017	Receding	0.15%	3.34%
Jul 2017	Receding	0.11%	2.80%	Mid Dry
Aug 2017	Receding	0.09%	2.78%
Sep 2017	Receding	0.07%	2.78%	Dry Interval
Oct 2017	Receding	0.05%	2.78%	Dry Interval
Nov 2017	Receding	0.04%	2.87%	Dry End (interval)

▶HY 2016Dec 2015 – Nov 2016

Cycle: 12.0 mosAmplitude: 0.10%MEDIUM CONFIDENCE

Peak Wet MonthFebruary 2016 – March 20160.13% extent

Mid-Dry TargetJuly 20160.05% extent

End Dry MonthSeptember 2016 – November 20160.03% extent

Medium confidence: Boundary is provisional and was not confirmed.

Month	Phase	Water Extent	Invalid/Cloud Cover	Key Event
Dec 2015	Rising	0.04%	4.51%
Jan 2016	Rising	0.08%	3.08%
Feb 2016	Rising	0.13%	4.87%	Wet Peak (interval)
Mar 2016	Receding	0.12%	2.86%	Wet Interval
Apr 2016	Receding	0.07%	2.79%
May 2016	Receding	0.09%	2.80%
Jun 2016	Receding	0.06%	2.80%
Jul 2016	Receding	0.05%	2.79%	Mid Dry
Aug 2016	Receding	0.05%	2.79%
Sep 2016	Receding	0.04%	2.78%	Dry Interval
Oct 2016	Receding	0.03%	2.98%	Dry Interval
Nov 2016	Receding	0.03%	2.79%	Dry End (interval)

▶HY 2015Dec 2014 – Nov 2015

Cycle: 12.0 mosAmplitude: 0.28%MEDIUM CONFIDENCE

Peak Wet MonthJanuary 20150.32% extent

Mid-Dry TargetJune 20150.07% extent

End Dry MonthSeptember 2015 – November 20150.03% extent

Medium confidence: Boundary is provisional and was not confirmed.

Month	Phase	Water Extent	Invalid/Cloud Cover	Key Event
Dec 2014	Rising	0.09%	6.39%
Jan 2015	Rising	0.32%	30.11%	Wet Peak
Feb 2015	Receding	0.21%	3.07%
Mar 2015	Receding	0.16%	3.27%
Apr 2015	Receding	0.10%	3.22%
May 2015	Receding	0.08%	2.85%
Jun 2015	Receding	0.07%	2.79%	Mid Dry
Jul 2015	Receding	0.05%	2.78%
Aug 2015	Receding	0.05%	2.78%
Sep 2015	Receding	0.04%	2.78%	Dry Interval
Oct 2015	Receding	0.03%	2.78%	Dry Interval
Nov 2015	Receding	0.03%	2.80%	Dry End (interval)

▶HY 2014Dec 2013 – Nov 2014

Cycle: 12.0 mosAmplitude: 0.79%HIGH CONFIDENCE

Peak Wet MonthFebruary 20140.82% extent

Mid-Dry TargetJuly 20140.07% extent

End Dry MonthNovember 20140.03% extent

Month	Phase	Water Extent	Invalid/Cloud Cover	Key Event
Dec 2013	Rising	0.10%	42.56%
Jan 2014	Rising	0.13%	9.09%
Feb 2014	Rising	0.82%	10.04%	Wet Peak
Mar 2014	Receding	0.19%	4.25%
Apr 2014	Receding	0.11%	2.80%
May 2014	Receding	0.09%	3.05%
Jun 2014	Receding	0.07%	2.80%
Jul 2014	Receding	0.07%	2.79%	Mid Dry
Aug 2014	Receding	0.06%	2.78%
Sep 2014	Receding	0.04%	2.78%
Oct 2014	Receding	0.04%	2.78%
Nov 2014	Receding	0.03%	3.67%	Dry End

▶HY 2013Nov 2012 – Nov 2013

Cycle: 13.0 mosAmplitude: 0.16%MEDIUM CONFIDENCE

Peak Wet MonthMarch 20130.19% extent

Mid-Dry TargetJuly 20130.05% extent

End Dry MonthAugust 2013 – November 20130.03% extent

Medium confidence: Boundary is provisional and was not confirmed.

Month	Phase	Water Extent	Invalid/Cloud Cover	Key Event
Nov 2012	Rising	0.03%	42.42%
Dec 2012	Rising	0.02%	21.05%
Jan 2013	Rising	0.03%	33.42%
Feb 2013	Rising	0.11%	13.45%
Mar 2013	Rising	0.19%	8.45%	Wet Peak
Apr 2013	Receding	0.08%	3.31%
May 2013	Receding	0.08%	4.04%
Jun 2013	Receding	0.08%	4.28%
Jul 2013	Receding	0.05%	2.78%	Mid Dry
Aug 2013	Receding	0.04%	2.79%	Dry Interval
Sep 2013	Receding	0.04%	2.79%	Dry Interval
Oct 2013	Receding	0.03%	2.86%	Dry Interval
Nov 2013	Receding	0.03%	2.79%	Dry End (broad)

▶HY 2012Oct 2011 – Oct 2012

Cycle: 13.0 mosAmplitude: 0.27%MEDIUM CONFIDENCE

Peak Wet MonthMarch 20120.30% extent

Mid-Dry TargetJune 20120.08% extent

End Dry MonthSeptember 2012 – October 20120.03% extent

Medium confidence: Boundary is provisional and was not confirmed.

Month	Phase	Water Extent	Invalid/Cloud Cover	Key Event
Oct 2011	Rising	0.07%	15.79%
Nov 2011	Rising	0.07%	9.37%
Dec 2011	Rising	0.09%	16.86%
Jan 2012	Rising	0.21%	30.30%
Feb 2012	Rising	0.13%	12.38%
Mar 2012	Rising	0.30%	22.07%	Wet Peak
Apr 2012	Receding	0.18%	7.91%
May 2012	Receding	0.09%	11.54%
Jun 2012	Receding	0.08%	9.27%	Mid Dry
Jul 2012	Receding	0.07%	8.57%
Aug 2012	Receding	0.06%	5.47%
Sep 2012	Receding	0.04%	4.65%	Dry Interval
Oct 2012	Receding	0.03%	6.30%	Dry End (interval)

▶HY 2011Jan 2011 – Sep 2011

Cycle: 9.0 mosAmplitude: 3.68%MEDIUM CONFIDENCE

Peak Wet MonthMarch 20113.73% extent

Mid-Dry TargetJune 20110.13% extent

End Dry MonthSeptember 20110.05% extent

Medium confidence: The peak month was far more obscured than that month usually is, so the cycle's peak could not be trusted.

Month	Phase	Water Extent	Invalid/Cloud Cover	Key Event
Jan 2011	Rising	0.25%	6.90%
Feb 2011	Rising	0.56%	28.18%
Mar 2011	Rising	3.73%	63.36%	Wet Peak
Apr 2011	Receding	0.41%	4.52%
May 2011	Receding	0.20%	4.74%
Jun 2011	Receding	0.13%	2.79%	Mid Dry
Jul 2011	Receding	0.12%	10.58%
Aug 2011	Receding	0.10%	3.40%
Sep 2011	Receding	0.05%	3.97%	Dry End

▶HY 2010Dec 2009 – Dec 2010

Cycle: 13.0 mosAmplitude: 0.12%LOW CONFIDENCE

Peak Wet MonthJanuary 20100.16% extent

Mid-Dry TargetJuly 20100.07% extent

End Dry MonthNovember 2010 – December 20100.05% extent

Month	Phase	Water Extent	Invalid/Cloud Cover	Key Event
Dec 2009	Rising	0.05%	5.37%
Jan 2010	Rising	0.16%	9.55%	Wet Peak
Feb 2010	Receding	0.12%	2.80%
Mar 2010	Receding	0.10%	9.68%
Apr 2010	Receding	0.08%	2.96%
May 2010	Receding	0.07%	9.34%
Jun 2010	Receding	0.05%	4.76%
Jul 2010	Receding	0.07%	14.84%	Mid Dry
Aug 2010	Receding	0.05%	11.72%
Sep 2010	Receding	0.04%	34.02%
Oct 2010	Receding	0.12%	30.78%
Nov 2010	Receding	0.05%	2.98%	Dry Interval
Dec 2010	Receding	0.05%	2.87%	Dry End (interval)

▶HY 2009Dec 2008 – Nov 2009

Cycle: 12.0 mosAmplitude: 1.14%HIGH CONFIDENCE

Peak Wet MonthFebruary 20091.17% extent

Mid-Dry TargetJuly 20090.06% extent

End Dry MonthSeptember 2009 – November 20090.03% extent

Month	Phase	Water Extent	Invalid/Cloud Cover	Key Event
Dec 2008	Rising	0.04%	4.02%
Jan 2009	Rising	0.20%	4.67%
Feb 2009	Rising	1.17%	7.19%	Wet Peak
Mar 2009	Receding	0.26%	2.78%
Apr 2009	Receding	0.15%	2.78%
May 2009	Receding	0.10%	2.86%
Jun 2009	Receding	0.05%	3.67%
Jul 2009	Receding	0.06%	2.86%	Mid Dry
Aug 2009	Receding	0.06%	2.78%
Sep 2009	Receding	0.04%	2.78%	Dry Interval
Oct 2009	Receding	0.04%	2.80%	Dry Interval
Nov 2009	Receding	0.03%	2.78%	Dry End (interval)

▶HY 2008Nov 2007 – Nov 2008

Cycle: 13.0 mosAmplitude: 0.25%MEDIUM CONFIDENCE

Peak Wet MonthFebruary 20080.28% extent

Mid-Dry TargetJuly 20080.06% extent

End Dry MonthAugust 2008 – November 20080.02% extent

Medium confidence: The peak month was far more obscured than that month usually is, so the cycle's peak could not be trusted.

Month	Phase	Water Extent	Invalid/Cloud Cover	Key Event
Nov 2007	Rising	0.03%	6.26%
Dec 2007	Rising	0.08%	20.54%
Jan 2008	Rising	0.09%	9.17%
Feb 2008	Rising	0.28%	29.09%	Wet Peak
Mar 2008	Receding	0.20%	2.96%
Apr 2008	Receding	0.14%	2.77%
May 2008	Receding	0.08%	2.77%
Jun 2008	Receding	0.10%	8.84%
Jul 2008	Receding	0.06%	10.11%	Mid Dry
Aug 2008	Receding	0.04%	2.78%	Dry Interval
Sep 2008	Receding	0.04%	2.83%	Dry Interval
Oct 2008	Receding	0.03%	2.79%	Dry Interval
Nov 2008	Receding	0.02%	2.81%	Dry End (broad)

▶HY 2007Nov 2006 – Oct 2007

Cycle: 12.0 mosAmplitude: 0.26%MEDIUM CONFIDENCE

Peak Wet MonthMarch 20070.29% extent

Mid-Dry TargetJune 20070.07% extent

End Dry MonthJuly 2007 – October 20070.03% extent

Medium confidence: The peak month was far more obscured than that month usually is, so the cycle's peak could not be trusted.

Month	Phase	Water Extent	Invalid/Cloud Cover	Key Event
Nov 2006	Rising	0.03%	4.42%
Dec 2006	Rising	0.03%	3.09%
Jan 2007	Rising	0.13%	10.31%
Feb 2007	Rising	0.10%	2.86%
Mar 2007	Rising	0.29%	34.49%	Wet Peak
Apr 2007	Receding	0.24%	2.77%
May 2007	Receding	0.09%	2.77%
Jun 2007	Receding	0.07%	2.84%	Mid Dry
Jul 2007	Receding	0.06%	2.78%	Dry Interval
Aug 2007	Receding	0.05%	2.77%	Dry Interval
Sep 2007	Receding	0.04%	2.79%	Dry Interval
Oct 2007	Receding	0.03%	4.07%	Dry End (broad)

▶HY 2006Nov 2005 – Oct 2006

Cycle: 12.0 mosAmplitude: 0.68%MEDIUM CONFIDENCE

Peak Wet MonthJanuary 20060.70% extent

Mid-Dry TargetJune 20060.07% extent

End Dry MonthOctober 20060.02% extent

Medium confidence: The peak month was far more obscured than that month usually is, so the cycle's peak could not be trusted.

Month	Phase	Water Extent	Invalid/Cloud Cover	Key Event
Nov 2005	Rising	0.03%	2.82%
Dec 2005	Rising	0.08%	29.12%
Jan 2006	Rising	0.70%	58.42%	Wet Peak
Feb 2006	Receding	0.28%	5.48%
Mar 2006	Receding	0.61%	8.97%
Apr 2006	Receding	0.13%	2.80%
May 2006	Receding	0.09%	2.82%
Jun 2006	Receding	0.07%	2.80%	Mid Dry
Jul 2006	Receding	0.06%	2.79%
Aug 2006	Receding	0.05%	2.78%
Sep 2006	Receding	0.03%	2.78%
Oct 2006	Receding	0.02%	2.80%	Dry End

▶HY 2005Jan 2005 – Oct 2005

Cycle: 10.0 mosAmplitude: 0.09%MEDIUM CONFIDENCE

Peak Wet MonthMarch 20050.12% extent

Mid-Dry TargetJune 20050.04% extent

End Dry MonthOctober 20050.02% extent

Medium confidence: This year's start is inferred from the record's first observed month, not a detected trough — there is no data before it to confirm where the previous dry season ended.

Month	Phase	Water Extent	Invalid/Cloud Cover	Key Event
Jan 2005	Rising	0.03%	3.80%
Feb 2005	Rising	0.08%	2.88%
Mar 2005	Rising	0.12%	5.26%	Wet Peak
Apr 2005	Receding	0.06%	4.14%
May 2005	Receding	0.05%	2.78%
Jun 2005	Receding	0.04%	2.79%	Mid Dry
Jul 2005	Receding	0.04%	2.80%
Aug 2005	Receding	0.03%	2.78%
Sep 2005	Receding	0.03%	2.79%
Oct 2005	Receding	0.02%	2.80%	Dry End

Raw Data Browser

Filter and explore the monthly extent data directly.

Date	Phase	Hydro Year	Extent (%)	Invalid (%)	Data quality	Wet event	Low-extent spell

Rainfall context (supplied CSV)

Agree

Rainfall regime: seasonal
Comparison: Agree
Extent peak / trough: February / November
Rain peak / trough: January / August
Peak lag: 1 month(s)

Both rainfall and observed surface-water extent show a reproducible annual cycle. Peak lags rainfall by 1 month(s). Water availability here plausibly tracks local rainfall seasonality; this is consistent with, not proof of, a direct rainfall-driven relationship.