NZ Historic Weather Events Catalogue

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ModerateNovember 1957 Lower South Island Flooding ( 1957-11-19 )

38 years

Notes: Heavy rain caused flooding in Otago and Southland which had only just recovered from flooding in May. Most affected were areas in the lower Clutha such as Inch Clutha and Stirling.

Otago

Heavy RainHeavy Rain at Otago
Comments:

CauseA rapidly deepening depression which had formed in the central Tasman Sea moved down the cold front then passed into Fiordland

CauseThe combination of exceptionally heavy rain and melting late snow in the catchments above the lakes caused initial flooding

CauseFurther rain occurred on the 19th and 20th of November as another depression crossed Otago from the north west

DurationThe rains lasted 3 or 4 days

CommentHeavy rainfall occurred in Central and West Otago catchment areas of the Clutha River

CommentSome of the heaviest falls were in the lower catchment and coincided with the arrival of the flood peak

FloodingFlooding
Comments:

CommentA series of floods in the Clutha gave rise the most severe and the most prolonged and damaging flooding experienced since 1919

CommentPractically the whole of the catchment was affected with the position particularly bad in South Otago, which had hardly recovered from May floods

CommentWorst affected South Otago areas were Inch Clutha and areas near Stirling and Kaitangata

CommentFlooding in central Otago and in the Lakes districts was also severe

Affected LifelineRoaring Meg and other small hydro power stations were put out of action

Affected LifelineThe damage caused to roads and bridges was the worst experienced for many years

DamageRiver and drainage works suffered severe damage

Damage CostDamage and economic loss total was estimated at £650,000 ($27,738,000 2009 dollars)

Damage CostDamage estimated to river and drainage works was £125,000 ($5,334,000 2009 dollars)

Damage CostDamage estimated to homes and crops was £90,000 ($3,841,000 2009 dollars)

Damage CostDamage estimated to communications was £7000 ($300,000 2009 dollars)

Damage CostProduction loss in the current season was estimated to be £285,000 ($12,162,000 2009 dollars)

Damage CostProduction loss in the next season was estimated to be £143,000 ($6,102,000 2009 dollars)

Affected LifelineThe main railway line between Dunedin and Invercargill was closed for up to 2 weeks

ImpactCoal supplies were delayed

Heavy RainHeavy Rain at Hukarere
Comments:

Physical CharacteristicHukarere at the headwaters of Pomahaka River recorded 1 in (2.54cm) in four hours to 8:30pm on the 20th

FloodingFlooding at Lake Wakatipu
Map Location: -45.058135 168.633686
Comments:

CommentLakes Wakatipu and Lake Hawea were high and rising on the night of the 20th

CommentLake Wakatipu rose to its peak flood level which was the highest since 1924

Heavy RainHeavy Rain at Queenstown
Map Location: -45.041441 168.645105
Comments:

CommentRain began early in the afternoon on the 20th and a south-west wind during the night brought more heavy showers

FloodingFlooding
Comments:

Affected LifelinePower were supplies cut

CommentLake Wakatipu reached the streets of Queenstown on the night of the 20th

Affected LifelineWater was half way across Rees Street and was still rising late on the night of the 20th and the road to the park gates was flooded early in the afternoon

ImpactPlanks had to be used to gain entry to some businesses

FloodingFlooding at Earnscleugh
Map Location: -45.215932 169.31466
Comments:

ImpactFraser River broke through at Earnscleugh on the 19th and inundated 12 homesteads. The rain kept them isolated on the 20th and food and mail was brought to them by horseback on the 21st

Stock DamageNo stock losses were reported

FloodingFlooding at Lake Wanaka
Map Location: -44.638329 169.076955
Comments:

Physical CharacteristicLake Wanaka maximum inflow was 165000 cusecs (4672 cumecs) which had been exceeded only twice since 1924

CommentLake Wanaka was over the main jetty and still rising on the 20th. It was as high as it had ever been

CommentClutha River was running bank-high at Wanaka and the rivers, streams and watercourses feeding the higher reaches of the Clutha River were swollen

Affected LifelineThe main road from Wanaka to Cromwell was impassable with washouts at Luggate and Lowburn

FloodingFlooding at Roaring Meg
Comments:

ImpactThe Roaring Meg powerhouse water dropped 8-9 ft (2.4-2.7m) during the day, left 4 in (10cm) of silt in building and caused silt damage to machinery

FloodingFlooding at Kawarau
Map Location: -45.020175 168.966862
Comments:

Physical CharacteristicKawarau River rose and fell erratically. It peaked at 2ft (61cm) below the Ministry of Works pump at Ripponvale and started dropping on the 20th

Multi HazardMulti Hazard
Comments:

Affected LifelineHeavy rains caused many slips which closed the main highway through Kawarau Gorge

FloodingFlooding at Clyde
Map Location: -45.187564 169.329189
Comments:

Physical CharacteristicClutha River reached a peak of 13 ft 9 in (4.2m) above normal at 2pm on the 20th then fell steadily

Peak DischargeAt the Clyde recorder the Clutha River had a maximum discharge of 94,000 cusecs (2662 cumecs) with a catchment area of 4640 sq miles (12 018km^2) (the gauge height was at 15.42ft)

ImpactSome houses on the west of the river were isolated

Physical CharacteristicLots of debris was flowing down the river at this point

FloodingFlooding at Alexandra
Map Location: -45.253862 169.375391
Comments:

Physical CharacteristicThe Clutha River at the Alexandra bridge reached 36 ft (11m) but had fallen to 33 ft (10m) by 8pm on the 20th

FloodingFlooding at Roxburgh
Map Location: -45.54246 169.300336
Comments:

Physical CharacteristicDischarge from the Roxburgh Hydro Dam went from 30,000 to 91,000 cusecs (850 to 2577 cumecs) from 4pm on the 18th to 6pm on the 20th

Physical CharacteristicThe spillway level of the Roxburgh Dam was 17ft (5.2m) but dropped to 15ft (4.6m) late on the 20th

CommentIt was still raining heavily in the back country on the 21st

Physical CharacteristicThe slaughter yards were under 8-10ft (2.4-3m) of water

FloodingFlooding at Ettrick
Map Location: -45.636095 169.371395
Comments:

Physical CharacteristicSeveral orchardists were isolated with water up to 30 in (76cm) deep in some orchards

FloodingFlooding at Tapanui Flat
Map Location: -45.945409 169.268023
Comments:

CommentAll creeks were running high at Tapanui Flat

FloodingFlooding at Ophir
Map Location: -45.109548 169.608839
Comments:

Peak DischargeManuherikia River had a peak discharge at Ophir of 12,300 cusecs (348 cumecs)

FloodingFlooding at Balclutha
Map Location: -46.23013 169.733472
Comments:

Peak DischargeAt Balclutha the Clutha River had a peak discharge of 125,000 cusecs (3540 cumecs) which was the third largest flood in nearly a hundred years of record

Physical CharacteristicThere were three further peaks with the highest being 90,000 cusecs (2549 cumecs) which occurred as a result of continued bad weather

CommentA break occurred in the Koau stopbanks

EvacueesMany people were evacuated

DamageHouses, buildings, fences, roads and drains suffered severe damage

Crop DamageCrops were lost and farming operations were completely disrupted for long periods

CasualtiesFour people drowned in a boating accident while trying to cross the Clutha River

CommentClutha River overflowed onto the low-lying areas past Balclutha at approximately 12pm on the 20th

ImpactStopbanks protecting the Otanomomo district were overtopped and 4800 acres (1942 ha) were inundated

ImpactIn the lower Clutha area approximately 19000 acres (7689 ha) were under water and at least half of this flooding was serious

EvacueesBalclutha's elderly and children from homesteads in badly flooded areas were evacuated

Stock DamageStock losses may have been serious

Affected LifelineThe main south railway line to Invercargill was closed during the afternoon of the 20th due to scour danger

CommentThe town of Balclutha and railway lines were sandbagged

Physical CharacteristicThe highway through the town was covered by water almost 1ft (30cm) deep

Affected LifelineThe railway yards at the front of the station and parts of the railway line were covered with several feet of water

Affected LifelineNorth to south rail traffic was cancelled on the 21st

Peak River LevelClutha River reached a maximum level of 72 ft 8 in (22.1m) at 9:30pm on the 20th

Affected LifelineA washout of the railway line just south of the Balclutha station caused cancellation of services between Dunedin and Invercargill

Affected LifelineThe Invercargill to Lyttelton express was cancelled on the morning of the 21st

Physical CharacteristicOn the 21st the Clutha River had dropped 9 in (23cm) at Balclutha since the peak level which occurred at 12am on the 20th

Physical CharacteristicPomahaka River rose 7 ft (2.1m) above normal

CommentBalclutha's sandbag defences withstood the flood

FloodingFlooding at Inch Clutha
Map Location: -46.288561 169.780158
Comments:

DamageDamage was more pronounced in lower Inch Clutha where flood waters flowed back into the river

ImpactDozens of people were marooned on Inch Clutha

Physical CharacteristicAn estimated 10000 acres (4047 ha) of land including 6000 acres (2428 ha) of Inch Clutha was under water at midnight on the 20th

FloodingFlooding at Owaka
Map Location: -46.451552 169.649906
Comments:

Affected LifelineAt Owaka the railway lines were washed out

FloodingFlooding at Barnego
Map Location: -46.229256 169.717954
Comments:

ImpactBarnego stopbanks were overtopped and badly breached. Siltation occurred in areas adjacent to the breaks

Damage500 acres (202 ha) were flooded with considerable damage to pastures and fences

FloodingFlooding at Stirling
Map Location: -46.253158 169.786026
Comments:

Physical CharacteristicStopbanks below Balclutha were overtopped to depths of over 2 ft (61cm). The first major failure occurred at Hermitage on the Matau branch immediately upstream of Stirling on the night of the 20th

Physical CharacteristicA tremendous volume of water which was over 8 ft (2.44m) deep in places passed through Stirling township

DamageIt badly damaged houses and property and inundated low lying areas

Physical Characteristic6000 acres (2428 ha) were flooded

Affected LifelineRoads were scoured, rail and communications were disrupted for 3 days

EvacueesResidents of Stirling were evacuated

FloodingFlooding at Kaitangata
Map Location: -46.283362 169.855758
Comments:

ImpactKaitangata was practically isolated for nearly 2 weeks

FloodingFlooding at Kelso
Map Location: -45.905986 169.231867
Comments:

ImpactOverflows from the Pomahaka River inundated Kelso, isolating the township

Physical CharacteristicThe main street had 17 in (43cm) of water which made it impassable in the morning of the 21st but there was little damage done

Southland

Heavy RainHeavy Rain at Southland
Comments:

CauseContinuous warm rain on already softened snow caused unusually high and prolonged runoff into headwaters of all rivers where flood conditions occurred

FloodingFlooding
Comments:

CommentRivers overtopped their banks, stopbanks failed in places and drainage systems were overtaxed or unable to function

CommentOn the 19th the Oreti, Mataura and Aparima Rivers were "spewing their muddy, foaming torrents across the plains of central Southland"

CommentWyndham and Queenstown were awash

ImpactMany thousands of acres of rural and urban lands were inundated

Affected LifelineRoad, rail and telephone links were completely disrupted

Affected LifelineSome areas including townships were isolated

CommentFlooding was the worst that Southland had experienced in many years

DamageScouring and erosion was very pronouced in some places particularly in Dipton and Winton Channels

Affected LifelineOvertopping of Eyre Creek stopbanks caused damage to the railway

DamageRoads and highways suffered limited damage, mainly loss of gravel

Stock DamageSeveral farmers lost between 20 and 30 sheep

DamageWithin the farming community the assessment of losses and damages was considerable

CommentOreti and Aparima Rivers fell slightly on 20th

DamageFrom Wrey's Bus to Otautu (on Aparima River) and from Dipton to the Winton district (on Oreti), the flood waters left a trail of broken lines, strewn fences and hedges, pastures covered in silt, and crops and gardens scoured and smashed

CommentMuddy water poured over stopbanks for many miles below Gore, isolating farmhouses and cutting new channels throughout countryside

CommentOver a 14 mile stretch from Mandeville to Cattle Flat thousands of sheep stood belly deep in flood waters on the night of the 20th

Affected LifelineDozens of highways and minor roads throughout Southland were impassable on the 20th

Heavy RainHeavy Rain at Wyndham
Map Location: -46.325789 168.855161
Comments:

CommentIn Wyndham heavy rain was still falling on the 20th

FloodingFlooding
Comments:

CommentOn the night of the 20th an emergency rescue and relief station was set up in Wyndham

CommentFlood waters invaded the township from Mimihau Stream

Physical CharacteristicWater flooding to 12-18 in (30-46cm) in many parts of township at 11pm on the 20th

Affected LifelineRoads on all sides were closed

EvacueesApproximately 7 families were evacuated

FloodingFlooding at Riversdale
Map Location: -45.899134 168.738796
Comments:

CommentConsidered to be the worst flood in 44 years

Affected LifelineThe flood waters of Mataura River smashed through the protective banks near the iron traffic bridge and surged back half a mile to cover the township's main street knee deep

Heavy RainHeavy Rain at Dipton
Map Location: -45.899764 168.3735
Comments:

CommentTorrential rain fall and hail commenced late afternoon on the 20th

FloodingFlooding
Comments:

CommentThe main street was flooded from an early hour

CommentAt the township the was river still running half a mile wide on the night of the 20th and not falling much

FloodingFlooding at Riverton
Map Location: -46.353826 168.015058
Comments:

Physical CharacteristicAt the Riverton Highway Bridge the Oreti River had a discharge of 29984 cusecs (849 cumecs), with a catchment area of 860 sq miles (2227km^2)

FloodingFlooding at Mataura Island
Map Location: -46.425652 168.787326
Comments:

Physical CharacteristicAt the Mataura Island Bridge the Mataura River had a discharge of 41000 cusecs (1161 cumecs), with a catchment area of 1960 sq miles (5076km^2)

Heavy RainHeavy Rain at Mid Dome
Map Location: -45.584835 168.53739
Comments:

Physical CharacteristicMid Dome recorded 2.01 in (5.1cm) of rain in 24 hours

Heavy RainHeavy Rain at Drummond
Map Location: -46.14319 168.1515
Comments:

Physical CharacteristicDrummond recorded 1.76 in (4.5cm) of rain in 13 hours

Heavy RainHeavy Rain at Invercargill
Map Location: -46.436318 168.35975
Comments:

Physical CharacteristicInvercargill recorded 1.66 in (4.2cm) of rain in 17 hours

FloodingFlooding at Mataura
Map Location: -46.18797 168.855413
Comments:

Peak DischargeThe annual maximum flood discharge occurred during the May floods with a discharge of 963 cumecs at Mataura

References

Flood report July 2003, Environment Southland
O:\RSKD102\RawData\Archives\Documentation\1957-11-19th-21st Lower South Island FloodingTable of rivers within the Southland region
Hydrology Annual No.5 1957, Soil Conservation and Rivers Control Council, Wellington, New Zealand
O:\RSKD102\RawData\Archives\Documentation\1957-11-19th-21st Lower South Island FloodingTable of the discharge of rivers within the Otago region
Hydrology Annual, No.5 1957, Soil Conservation and Rivers Control Council, Wellington, New Zealand.
Hydrology Annual, No. 15, 1967, Part 1, A.R. Shearer, 1970, Government Printer, Wellington, Water and Soil Division, New Zealand
Major weather events in New Zealand, FLOODS AND HIGH RAINFALL, Floods to 31st July 2006
Headline: Balclutha Defences Hold.
Otago Daily Times, 21 November 1957.
Headline: Families Evacuate Stirling: Worst Flood Since 1919.
Otago Daily Times, 21 November 1957.
Headline: Flood's Grip Has Loosened: But Struggle Not Ended Yet.
Otago Daily Times, 22 November 1957.
Headline: Mataura In Full Cry.
Otago Daily Times, 21 November 1957.
Headline: Rising Lake Reaches Streets Of Queenstown.
Otago Daily Times, 21 November 1957.
Headline: Train Changes.
Otago Daily Times, 21 November 1957.
Surface Water Hydrology of the Mataura River Catchment.
The Southland Times, Invercargill, Sunday, January 1, 1950 - Thursday, December 31, 1959, Special souvenir edition, A century of news, p. 14.

ModerateNovember 1957 Lower South Island Flooding ( 1957-11-19 )

38 years

Notes: Heavy rain caused flooding in Otago and Southland which had only just recovered from flooding in May. Most affected were areas in the lower Clutha such as Inch Clutha and Stirling.

Otago

Heavy RainHeavy Rain at Otago
Comments:

CauseA rapidly deepening depression which had formed in the central Tasman Sea moved down the cold front then passed into Fiordland

CauseThe combination of exceptionally heavy rain and melting late snow in the catchments above the lakes caused initial flooding

CauseFurther rain occurred on the 19th and 20th of November as another depression crossed Otago from the north west

DurationThe rains lasted 3 or 4 days

CommentHeavy rainfall occurred in Central and West Otago catchment areas of the Clutha River

CommentSome of the heaviest falls were in the lower catchment and coincided with the arrival of the flood peak

FloodingFlooding
Comments:

CommentA series of floods in the Clutha gave rise the most severe and the most prolonged and damaging flooding experienced since 1919

CommentPractically the whole of the catchment was affected with the position particularly bad in South Otago, which had hardly recovered from May floods

CommentWorst affected South Otago areas were Inch Clutha and areas near Stirling and Kaitangata

CommentFlooding in central Otago and in the Lakes districts was also severe

Affected LifelineRoaring Meg and other small hydro power stations were put out of action

Affected LifelineThe damage caused to roads and bridges was the worst experienced for many years

DamageRiver and drainage works suffered severe damage

Damage CostDamage and economic loss total was estimated at £650,000 ($27,738,000 2009 dollars)

Damage CostDamage estimated to river and drainage works was £125,000 ($5,334,000 2009 dollars)

Damage CostDamage estimated to homes and crops was £90,000 ($3,841,000 2009 dollars)

Damage CostDamage estimated to communications was £7000 ($300,000 2009 dollars)

Damage CostProduction loss in the current season was estimated to be £285,000 ($12,162,000 2009 dollars)

Damage CostProduction loss in the next season was estimated to be £143,000 ($6,102,000 2009 dollars)

Affected LifelineThe main railway line between Dunedin and Invercargill was closed for up to 2 weeks

ImpactCoal supplies were delayed

Heavy RainHeavy Rain at Hukarere
Comments:

Physical CharacteristicHukarere at the headwaters of Pomahaka River recorded 1 in (2.54cm) in four hours to 8:30pm on the 20th

FloodingFlooding at Lake Wakatipu
Map Location: -45.058135 168.633686
Comments:

CommentLakes Wakatipu and Lake Hawea were high and rising on the night of the 20th

CommentLake Wakatipu rose to its peak flood level which was the highest since 1924

Heavy RainHeavy Rain at Queenstown
Map Location: -45.041441 168.645105
Comments:

CommentRain began early in the afternoon on the 20th and a south-west wind during the night brought more heavy showers

FloodingFlooding
Comments:

Affected LifelinePower were supplies cut

CommentLake Wakatipu reached the streets of Queenstown on the night of the 20th

Affected LifelineWater was half way across Rees Street and was still rising late on the night of the 20th and the road to the park gates was flooded early in the afternoon

ImpactPlanks had to be used to gain entry to some businesses

FloodingFlooding at Earnscleugh
Map Location: -45.215932 169.31466
Comments:

ImpactFraser River broke through at Earnscleugh on the 19th and inundated 12 homesteads. The rain kept them isolated on the 20th and food and mail was brought to them by horseback on the 21st

Stock DamageNo stock losses were reported

FloodingFlooding at Lake Wanaka
Map Location: -44.638329 169.076955
Comments:

Physical CharacteristicLake Wanaka maximum inflow was 165000 cusecs (4672 cumecs) which had been exceeded only twice since 1924

CommentLake Wanaka was over the main jetty and still rising on the 20th. It was as high as it had ever been

CommentClutha River was running bank-high at Wanaka and the rivers, streams and watercourses feeding the higher reaches of the Clutha River were swollen

Affected LifelineThe main road from Wanaka to Cromwell was impassable with washouts at Luggate and Lowburn

FloodingFlooding at Roaring Meg
Comments:

ImpactThe Roaring Meg powerhouse water dropped 8-9 ft (2.4-2.7m) during the day, left 4 in (10cm) of silt in building and caused silt damage to machinery

FloodingFlooding at Kawarau
Map Location: -45.020175 168.966862
Comments:

Physical CharacteristicKawarau River rose and fell erratically. It peaked at 2ft (61cm) below the Ministry of Works pump at Ripponvale and started dropping on the 20th

Multi HazardMulti Hazard
Comments:

Affected LifelineHeavy rains caused many slips which closed the main highway through Kawarau Gorge

FloodingFlooding at Clyde
Map Location: -45.187564 169.329189
Comments:

Physical CharacteristicClutha River reached a peak of 13 ft 9 in (4.2m) above normal at 2pm on the 20th then fell steadily

Peak DischargeAt the Clyde recorder the Clutha River had a maximum discharge of 94,000 cusecs (2662 cumecs) with a catchment area of 4640 sq miles (12 018km^2) (the gauge height was at 15.42ft)

ImpactSome houses on the west of the river were isolated

Physical CharacteristicLots of debris was flowing down the river at this point

FloodingFlooding at Alexandra
Map Location: -45.253862 169.375391
Comments:

Physical CharacteristicThe Clutha River at the Alexandra bridge reached 36 ft (11m) but had fallen to 33 ft (10m) by 8pm on the 20th

FloodingFlooding at Roxburgh
Map Location: -45.54246 169.300336
Comments:

Physical CharacteristicDischarge from the Roxburgh Hydro Dam went from 30,000 to 91,000 cusecs (850 to 2577 cumecs) from 4pm on the 18th to 6pm on the 20th

Physical CharacteristicThe spillway level of the Roxburgh Dam was 17ft (5.2m) but dropped to 15ft (4.6m) late on the 20th

CommentIt was still raining heavily in the back country on the 21st

Physical CharacteristicThe slaughter yards were under 8-10ft (2.4-3m) of water

FloodingFlooding at Ettrick
Map Location: -45.636095 169.371395
Comments:

Physical CharacteristicSeveral orchardists were isolated with water up to 30 in (76cm) deep in some orchards

FloodingFlooding at Tapanui Flat
Map Location: -45.945409 169.268023
Comments:

CommentAll creeks were running high at Tapanui Flat

FloodingFlooding at Ophir
Map Location: -45.109548 169.608839
Comments:

Peak DischargeManuherikia River had a peak discharge at Ophir of 12,300 cusecs (348 cumecs)

FloodingFlooding at Balclutha
Map Location: -46.23013 169.733472
Comments:

Peak DischargeAt Balclutha the Clutha River had a peak discharge of 125,000 cusecs (3540 cumecs) which was the third largest flood in nearly a hundred years of record

Physical CharacteristicThere were three further peaks with the highest being 90,000 cusecs (2549 cumecs) which occurred as a result of continued bad weather

CommentA break occurred in the Koau stopbanks

EvacueesMany people were evacuated

DamageHouses, buildings, fences, roads and drains suffered severe damage

Crop DamageCrops were lost and farming operations were completely disrupted for long periods

CasualtiesFour people drowned in a boating accident while trying to cross the Clutha River

CommentClutha River overflowed onto the low-lying areas past Balclutha at approximately 12pm on the 20th

ImpactStopbanks protecting the Otanomomo district were overtopped and 4800 acres (1942 ha) were inundated

ImpactIn the lower Clutha area approximately 19000 acres (7689 ha) were under water and at least half of this flooding was serious

EvacueesBalclutha's elderly and children from homesteads in badly flooded areas were evacuated

Stock DamageStock losses may have been serious

Affected LifelineThe main south railway line to Invercargill was closed during the afternoon of the 20th due to scour danger

CommentThe town of Balclutha and railway lines were sandbagged

Physical CharacteristicThe highway through the town was covered by water almost 1ft (30cm) deep

Affected LifelineThe railway yards at the front of the station and parts of the railway line were covered with several feet of water

Affected LifelineNorth to south rail traffic was cancelled on the 21st

Peak River LevelClutha River reached a maximum level of 72 ft 8 in (22.1m) at 9:30pm on the 20th

Affected LifelineA washout of the railway line just south of the Balclutha station caused cancellation of services between Dunedin and Invercargill

Affected LifelineThe Invercargill to Lyttelton express was cancelled on the morning of the 21st

Physical CharacteristicOn the 21st the Clutha River had dropped 9 in (23cm) at Balclutha since the peak level which occurred at 12am on the 20th

Physical CharacteristicPomahaka River rose 7 ft (2.1m) above normal

CommentBalclutha's sandbag defences withstood the flood

FloodingFlooding at Inch Clutha
Map Location: -46.288561 169.780158
Comments:

DamageDamage was more pronounced in lower Inch Clutha where flood waters flowed back into the river

ImpactDozens of people were marooned on Inch Clutha

Physical CharacteristicAn estimated 10000 acres (4047 ha) of land including 6000 acres (2428 ha) of Inch Clutha was under water at midnight on the 20th

FloodingFlooding at Owaka
Map Location: -46.451552 169.649906
Comments:

Affected LifelineAt Owaka the railway lines were washed out

FloodingFlooding at Barnego
Map Location: -46.229256 169.717954
Comments:

ImpactBarnego stopbanks were overtopped and badly breached. Siltation occurred in areas adjacent to the breaks

Damage500 acres (202 ha) were flooded with considerable damage to pastures and fences

FloodingFlooding at Stirling
Map Location: -46.253158 169.786026
Comments:

Physical CharacteristicStopbanks below Balclutha were overtopped to depths of over 2 ft (61cm). The first major failure occurred at Hermitage on the Matau branch immediately upstream of Stirling on the night of the 20th

Physical CharacteristicA tremendous volume of water which was over 8 ft (2.44m) deep in places passed through Stirling township

DamageIt badly damaged houses and property and inundated low lying areas

Physical Characteristic6000 acres (2428 ha) were flooded

Affected LifelineRoads were scoured, rail and communications were disrupted for 3 days

EvacueesResidents of Stirling were evacuated

FloodingFlooding at Kaitangata
Map Location: -46.283362 169.855758
Comments:

ImpactKaitangata was practically isolated for nearly 2 weeks

FloodingFlooding at Kelso
Map Location: -45.905986 169.231867
Comments:

ImpactOverflows from the Pomahaka River inundated Kelso, isolating the township

Physical CharacteristicThe main street had 17 in (43cm) of water which made it impassable in the morning of the 21st but there was little damage done

Southland

Heavy RainHeavy Rain at Southland
Comments:

CauseContinuous warm rain on already softened snow caused unusually high and prolonged runoff into headwaters of all rivers where flood conditions occurred

FloodingFlooding
Comments:

CommentRivers overtopped their banks, stopbanks failed in places and drainage systems were overtaxed or unable to function

CommentOn the 19th the Oreti, Mataura and Aparima Rivers were "spewing their muddy, foaming torrents across the plains of central Southland"

CommentWyndham and Queenstown were awash

ImpactMany thousands of acres of rural and urban lands were inundated

Affected LifelineRoad, rail and telephone links were completely disrupted

Affected LifelineSome areas including townships were isolated

CommentFlooding was the worst that Southland had experienced in many years

DamageScouring and erosion was very pronouced in some places particularly in Dipton and Winton Channels

Affected LifelineOvertopping of Eyre Creek stopbanks caused damage to the railway

DamageRoads and highways suffered limited damage, mainly loss of gravel

Stock DamageSeveral farmers lost between 20 and 30 sheep

DamageWithin the farming community the assessment of losses and damages was considerable

CommentOreti and Aparima Rivers fell slightly on 20th

DamageFrom Wrey's Bus to Otautu (on Aparima River) and from Dipton to the Winton district (on Oreti), the flood waters left a trail of broken lines, strewn fences and hedges, pastures covered in silt, and crops and gardens scoured and smashed

CommentMuddy water poured over stopbanks for many miles below Gore, isolating farmhouses and cutting new channels throughout countryside

CommentOver a 14 mile stretch from Mandeville to Cattle Flat thousands of sheep stood belly deep in flood waters on the night of the 20th

Affected LifelineDozens of highways and minor roads throughout Southland were impassable on the 20th

Heavy RainHeavy Rain at Wyndham
Map Location: -46.325789 168.855161
Comments:

CommentIn Wyndham heavy rain was still falling on the 20th

FloodingFlooding
Comments:

CommentOn the night of the 20th an emergency rescue and relief station was set up in Wyndham

CommentFlood waters invaded the township from Mimihau Stream

Physical CharacteristicWater flooding to 12-18 in (30-46cm) in many parts of township at 11pm on the 20th

Affected LifelineRoads on all sides were closed

EvacueesApproximately 7 families were evacuated

FloodingFlooding at Riversdale
Map Location: -45.899134 168.738796
Comments:

CommentConsidered to be the worst flood in 44 years

Affected LifelineThe flood waters of Mataura River smashed through the protective banks near the iron traffic bridge and surged back half a mile to cover the township's main street knee deep

Heavy RainHeavy Rain at Dipton
Map Location: -45.899764 168.3735
Comments:

CommentTorrential rain fall and hail commenced late afternoon on the 20th

FloodingFlooding
Comments:

CommentThe main street was flooded from an early hour

CommentAt the township the was river still running half a mile wide on the night of the 20th and not falling much

FloodingFlooding at Riverton
Map Location: -46.353826 168.015058
Comments:

Physical CharacteristicAt the Riverton Highway Bridge the Oreti River had a discharge of 29984 cusecs (849 cumecs), with a catchment area of 860 sq miles (2227km^2)

FloodingFlooding at Mataura Island
Map Location: -46.425652 168.787326
Comments:

Physical CharacteristicAt the Mataura Island Bridge the Mataura River had a discharge of 41000 cusecs (1161 cumecs), with a catchment area of 1960 sq miles (5076km^2)

Heavy RainHeavy Rain at Mid Dome
Map Location: -45.584835 168.53739
Comments:

Physical CharacteristicMid Dome recorded 2.01 in (5.1cm) of rain in 24 hours

Heavy RainHeavy Rain at Drummond
Map Location: -46.14319 168.1515
Comments:

Physical CharacteristicDrummond recorded 1.76 in (4.5cm) of rain in 13 hours

Heavy RainHeavy Rain at Invercargill
Map Location: -46.436318 168.35975
Comments:

Physical CharacteristicInvercargill recorded 1.66 in (4.2cm) of rain in 17 hours

FloodingFlooding at Mataura
Map Location: -46.18797 168.855413
Comments:

Peak DischargeThe annual maximum flood discharge occurred during the May floods with a discharge of 963 cumecs at Mataura

References

Flood report July 2003, Environment Southland
O:\RSKD102\RawData\Archives\Documentation\1957-11-19th-21st Lower South Island FloodingTable of rivers within the Southland region
Hydrology Annual No.5 1957, Soil Conservation and Rivers Control Council, Wellington, New Zealand
O:\RSKD102\RawData\Archives\Documentation\1957-11-19th-21st Lower South Island FloodingTable of the discharge of rivers within the Otago region
Hydrology Annual, No.5 1957, Soil Conservation and Rivers Control Council, Wellington, New Zealand.
Hydrology Annual, No. 15, 1967, Part 1, A.R. Shearer, 1970, Government Printer, Wellington, Water and Soil Division, New Zealand
Major weather events in New Zealand, FLOODS AND HIGH RAINFALL, Floods to 31st July 2006
Headline: Balclutha Defences Hold.
Otago Daily Times, 21 November 1957.
Headline: Families Evacuate Stirling: Worst Flood Since 1919.
Otago Daily Times, 21 November 1957.
Headline: Flood's Grip Has Loosened: But Struggle Not Ended Yet.
Otago Daily Times, 22 November 1957.
Headline: Mataura In Full Cry.
Otago Daily Times, 21 November 1957.
Headline: Rising Lake Reaches Streets Of Queenstown.
Otago Daily Times, 21 November 1957.
Headline: Train Changes.
Otago Daily Times, 21 November 1957.
Surface Water Hydrology of the Mataura River Catchment.
The Southland Times, Invercargill, Sunday, January 1, 1950 - Thursday, December 31, 1959, Special souvenir edition, A century of news, p. 14.