Mangles River

{{Short description|River in the Tasman District, New Zealand}}

{{Use dmy dates|date=July 2019}}

{{Use New Zealand English|date=February 2024}}

{{Infobox river

| name = Mangles River

| image = Mangles River.jpg

| image_size =

| image_caption = Confluence of Mangles and Buller Rivers, circa 1900

| map = {{Maplink|frame=yes|type=line|plain=yes|zoom=10|frame-align=center|frame-width=270|frame-height=270|stroke-color=#0000ff|stroke-width=2}}

| map_size =

| map_caption = Route of the Mangles River

| map_alt =

| pushpin_map = New Zealand#New Zealand South Island

| pushpin_map_size = 270px

| pushpin_map_caption = Mouth of the Mangles River

| pushpin_map_alt =

| source1_location = Nuggety Creek Road

| source1_coordinates = {{coord|-41.76657|172.48169|format=dms|display=inline}}

| source1_elevation = {{convert|540|m|abbr=on}}

| mouth_location = Buller River

| mouth_elevation = {{convert|180|m|abbr=on}}

| mouth_coordinates = {{coord|-41.78723|172.36839|format=dms|display=inline,title}}

| subdivision_type1 = Country

| subdivision_name1 = New Zealand

| length = {{convert|25|km|abbr=on}}

| discharge1_avg =

| basin_size =

| progression = Mangles River → Buller River → Tasman Sea

| tributaries_left = Te Pātītī Stream, Te Peita Stream, Te Wīriki Stream, Tūtaki River, Blackwater River, Blue Duck Creek, Grey Duck Creek, Green Duck Creek

| tributaries_right = Campbell Creek, Harte Creek

| waterfalls =

| bridges =

}}

The Mangles River is in the South Island of New Zealand. Its main tributary is the Tūtaki River but it is also fed by water flowing off the Braeburn Range.{{Cite web|date=2021|title=Mangles at 5km u-s Buller River Quality|url=https://www.lawa.org.nz/explore-data/tasman-region/river-quality/upper-buller/mangles-at-5km-u-s-buller/|access-date=2021-05-19|website=Land, Air, Water Aotearoa (LAWA)}} It feeds into the Buller River near the town of Murchison.{{Cite news|date=27 March 2010|title=Buller River dreaming, and Murchison on my mind|work=The Nelson Mail|url=https://www.stuff.co.nz/nelson-mail/opinion/columnists/zane-mirfin/3515524/Buller-River-dreaming-and-Murchison-on-my-mind|access-date=20 May 2021}} The river is popular destination for kayaking and trout fishing.{{Cite web|last=Walrond|first=Carl|date=22 April 2015|title=Nelson places – Upper Buller River valley|url=https://teara.govt.nz/en/nelson-places/page-6|access-date=2021-05-19|website=teara.govt.nz|language=en}}{{Cite web|last=Robertson|first=Martin|date=June 9, 2020|title=Buller River Overview|url=https://www.packraftingtrips.nz/buller-river-overview/|access-date=2021-05-19|website=www.packraftingtrips.nz|language=en-US}}{{Cite web|date=2021|title=Buller River Access|url=https://fishandgame.org.nz/dmsdocument/119|access-date=20 May 2021|website=fishandgame.org.nz}}

William Fox was the New Zealand Company agent in Nelson when he explored the Buller as far south as Murchison in February 1846, with Thomas Brunner and Charles Heaphy. They renamed the lower section of the Tiraumea River,{{Cite web |date=14 March 1846 |title=Account of an Exploring Expedition to the S.W. of Nelson. Nelson Examiner and New Zealand Chronicle |url=https://paperspast.natlib.govt.nz/newspapers/NENZC18460314.2.3 |access-date=2023-01-01 |website=paperspast.natlib.govt.nz}} after the English MP, Ross Donnelly Mangles, one of the company's directors.{{Cite web |date=10 Jul 1923 |title=THE BULLER RIVER. EVENING POST |url=https://paperspast.natlib.govt.nz/newspapers/EP19230710.2.25 |access-date=2022-12-18 |website=paperspast.natlib.govt.nz}} The official name was gazetted as Mangles River on 27 May 2021.{{LINZ|id=28623|name=Mangles River|access-date=2022-12-18}}

River pollution has been monitored since 2016. About 75% of the catchment is in native forest, so that water quality is generally good, the only exception being nitrates.{{Cite web |title=Mangles at 5km u-s Buller River Quality |url=https://www.lawa.org.nz/explore-data/tasman-region/river-quality/upper-buller/mangles-at-5km-u-s-buller/ |access-date=2022-12-18 |website=Land, Air, Water Aotearoa (LAWA)}}

The river is bridged by SH6 near its confluence with the Buller.{{Cite web |title=Mangles River, Tasman |url=https://www.topomap.co.nz/NZTopoMap/nz36497/Mangles-River/ |access-date=2022-12-18 |website=NZ Topo Map |language=en}}