# Lake Disappear > Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Lake_Disappear > Markdown URL: https://mediated.wiki/source/Lake_Disappear.md > Source: https://en.wikipedia.org/wiki/Lake_Disappear > Source revision: 1346851931 > License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) {{Short description|Intermittent volcanogenic lake in New Zealand}} {{Use New Zealand English|date=April 2024}} {{Infobox body of water | name = Lake Disappear | image = Lake Disappear full.JPG | alt = Lake Disappear when full viewed from Kawhia Rd | caption = Lake Disappear when full viewed from Kawhia Rd (July 2008) | image_bathymetry = | caption_bathymetry = | pushpin_map = New Zealand | pushpin_map_alt= Location of Lake Disappear | pushpin_map_caption = Lake Disappear is in the [Waikato](/source/Waikato) region of the North Island. | location = [Waikato District](/source/Waikato_District), [Waikato](/source/Waikato) region, [North Island](/source/North_Island) | coords = {{Coord|-37.926191|174.916549|region:NZ_type:waterbody|display=inline,title}} | lake_type = [Intermittent](/source/intermittent_lake) | inflow = Pakihi Stream | outflow = [Sinkhole](/source/Sinkhole) | catchment = {{convert|7|km2|abbr=on}} | basin_countries = [New Zealand](/source/New_Zealand) | length = {{convert|2|km|abbr=on}} | width = | area = | depth = Up to {{convert|15|m|abbr=on}} | max-depth = | volume = | residence_time = | shore = | elevation = {{convert|170|m|ft|abbr=on}} | islands = | cities = }} '''Lake Disappear''' is an [intermittent](/source/intermittent_lake) [volcanogenic lake](/source/volcanogenic_lake) situated in the [North Island](/source/North_Island) of New Zealand, just over {{convert|20|km}} from [Raglan](/source/Raglan%2C_New_Zealand), {{convert|4|km}} beyond [Bridal Veil waterfall](/source/Bridal_Veil_Falls_(Waikato)). It has also been described as a solution lake.{{Cite book|url = http://researchcommons.waikato.ac.nz/bitstream/handle/10289/9270/Lowe%20and%20Green%201992_all%20Lakes.pdf?sequence=3&isAllowed=y|title = Landforms of New Zealand|last = J D Green|first = D J Lowe|publisher = Longrnan Paul, Auckland|year = 1992|pages = 135}} The south end can be seen from Kawhia Rd and, when the north end is full, it can be seen from the end of Plateau Rd on the [Pipiwharauroa Way](/source/Te_Uku_Wind_Farm).{{cite web|url=http://www.raglan.gen.nz/about-raglan/pipiwharauroa-walking-and-biking-trail/ |title=Pipiwharauroa Walking and Biking Trail | The Raglan Website |publisher=Raglan.gen.nz |date=2011-08-27 |access-date=2012-12-26}} It is the largest known [polje](/source/polje) in the country.{{Cite web|url=https://www.waikatoregion.govt.nz/assets/PageFiles/37519/tr201458.pdf|title=Waikato Regional Council Technical Report 2014/58 Waikato region shallow lakes management plan: Volume 1 Objectives and strategies for shallow lake management}} == Lake formation, volcanism and limestone == Lake Disappear lies in a valley dammed by a [lava flow](/source/Volcanic_dam) (similar to the one which also formed [Bridal Veil waterfall](/source/Bridal_Veil_Falls_(Waikato)) - see map below) and drained through a limestone [sinkhole](/source/sinkhole). The lava flow, which covered the [limestone](/source/limestone), was part of the [Okete Volcanics](/source/Geology_of_the_Auckland_Region) about 2 million years ago, coming from a vent on Whataipu (see map), just over a kilometre away. Page 43 of the 'Geology of the Raglan-Kawhia Area' says, “Only a few specific areas within the larger catchments are prone to flooding where river flow is restricted, most notably at Lake Disappear (R15/795635 [now on Topo maps BD32 & BE32{{cite web|url=http://www.linz.govt.nz/topography/topo-maps/map-chooser/singleview.php?xPos=11014&yPos=6575&scale=2&extent=7-BD32 |title=Map Chooser | Land Information New Zealand (LINZ) - Toitū te whenua |publisher=LINZ |date=2010-10-03 |access-date=2012-12-18}}]) Here, the Pakoka River [should be Pakihi – [Pakoka](/source/Pakoka_River) is the next valley with Bridal Veil fall] drains underground through limestone (Elgood Limestone). During times of prolonged heavy rain, water backs up behind the outlet to form a sizable lake over what are normally dry alluvial flats.”Geology of the Raglan-Kawhia Area: Institute of Geological & Nuclear Sciences (N.Z.), Barry Clayton Waterhouse, P. J. White 1994 {{ISBN|0-478-08837-X}} Elgood Limestone (an outcrop is in the photo - see Gallery - to the left) is part of the Glen Massey Formation. The geology guide describes it as, “forming prominent bluffs or surface outcrops displaying solution channels, [lapiez](/source/Karst), and [sinkholes](/source/sinkholes), and is everywhere a light grey, flaggy limestone containing up to 95% CaCO3. [Glauconite](/source/Glauconite) is common throughout, together with [Mesozoic](/source/Mesozoic) pebbles and greensand near the base”. About its late [Whaingaroan](/source/List_of_geochronologic_names) (about 27 million years ago) creation, it says, “The change from estuarine, shallow brackish water conditions (Mangakotuku Formation), to fully marine, open sea, [aerobic](/source/Aerobic_organism) conditions (Glen Massey Formation) is evidenced by near shore accumulation of the [bioclast](/source/bioclast)ic Elgood Limestone, [onlap](/source/onlap) of the succeeding Dunphail [Siltstone](/source/Siltstone), and subsequent deposition of Ahirau [Sandstone](/source/Sandstone) in an inner to mid shelf environment.” == Biota == Pakihi is a Māori term now commonly used to describe poorly drained, infertile land.{{cite web|url=http://www.teara.govt.nz/en/rural-language/5/2 |title=Pakihi - Rural language - Te Ara: The Encyclopedia of New Zealand |publisher=Teara.govt.nz |date=2009-03-01 |access-date=2012-12-26}} Much of the watershed of Lake Disappear was [podocarp](/source/podocarp) forest but is now mostly sheep and beef farms, with [Te Uku Wind Farm](/source/Te_Uku_Wind_Farm) around the source. A 1999 survey reported the lake-bed as dominated by [adventive](/source/Adventive_species) pasture species, with some indigenous [sedges](/source/Cyperaceae), and a remnant of secondary [kahikatea](/source/Dacrycarpus_dacrydioides) forest.{{Cite web|url=https://www.waikatoregion.govt.nz/assets/PageFiles/37521/TR201459.pdf|title=Waikato Regional Council Technical Report 2014/59 Waikato region shallow lakes management plan: Volume 2 Shallow lakes resource statement: Current status and future management recommendations}} A survey for the windfarm described the Pakihi, {{convert|2|km}} up from the Lake (site PR2), as having poor to moderate ecological health, indicated by significant growths of long-green filamentous algae. Landcare Research says, “Enrichment of the water with nutrients causes algal blooms, and changes the algal community from a slow-growing, diverse mixture into one dominated by problem algae like thick filamentous mats”.http://www.landcareresearch.co.nz/__data/assets/pdf_file/0018/41418/chp_8_nutrients.pdf {{Dead link|date=February 2022}} Inanga, longfin eel, koura (freshwater crayfish), freshwater snails, shrimps and banded kokopu have been found in the stream and Kaoro [climbing galaxias](/source/climbing_galaxias) (Galaxias brevipinnis) may be present. A January 2008 survey identified these indicators of stream quality as being present (the numbers on the left are the MCI Score{{cite web |url=http://www.waitakere.govt.nz/AbtCit/ei/EcoWtr/macroinv/macroinvertebrates.asp |title=Underwater Life - Macroinvertibrates |publisher=Waitakere.govt.nz |access-date=2012-12-26 |archive-url=https://web.archive.org/web/20130208160901/http://www.waitakere.govt.nz/AbtCit/ei/EcoWtr/macroinv/macroinvertebrates.asp |archive-date=2013-02-08 |url-status=dead }} - the higher the score, the more sensitive these [macroinvertebrates](/source/macroinvertebrates) are to pollution. The words on the right show how common or rare they were in the Pakihi) - thumb|Empty Lake Disappear - compare with full lake in photo above. (9) Caddisfly ''[Olinga feredayi](/source/Olinga_feredayi)'' (9) spiny-gilled mayfly ''[Coloburiscus humeralis](/source/Coloburiscus_humeralis)'' occasional (8) mayfly Deleatidium occasional (7) double-gilled mayfly Zephlebia occasional (7) caddisfly Rhyacophilidae abundant (7) dobsonfly ''[Archichauliodes diversus](/source/Archichauliodes_diversus)'' common (6) riffle beetle Elmidae{{cite web |url=http://www.landcareresearch.co.nz/resources/identification/animals/freshwater-invertebrates/guide/jointed-legs/insects-and-springtails/adult-beetles/riffle-beetles2 |title=Riffle beetles |publisher=Landcare Research |date=2012-09-25 |access-date=2012-12-26 |archive-date=2013-02-16 |archive-url=https://web.archive.org/web/20130216184633/http://www.landcareresearch.co.nz/resources/identification/animals/freshwater-invertebrates/guide/jointed-legs/insects-and-springtails/adult-beetles/riffle-beetles2 |url-status=dead }} 6 occasional (5) stony-cased caddisfly Pycnocentrodes{{Cite web |url=http://www.waitakere.govt.nz/AbtCit/ei/EcoWtr/macroinv/macroinvertebrates.asp |title=Underwater Life - Macroinvertibrates |access-date=2012-12-21 |archive-url=https://web.archive.org/web/20130208160901/http://www.waitakere.govt.nz/AbtCit/ei/EcoWtr/macroinv/macroinvertebrates.asp |archive-date=2013-02-08 |url-status=dead }} common (5) Crustacea ''[Paratya curvirostris](/source/Paratya_curvirostris)'' occasional (4) mud snail ''[Potamopyrgus antipodarum](/source/Potamopyrgus_antipodarum)'' common (3) sand fly [Austrosimulium](/source/Austrosimulium) occasional (3) [New Zealand freshwater mussel](/source/New_Zealand_freshwater_mussel) Hyridella rare{{Cite web |url=http://www.wel.co.nz/files/Wind%20Generation/Kessels%20Feb%2008.PDF |title=Archived copy |access-date=2012-12-21 |archive-url=https://web.archive.org/web/20130206034207/http://wel.co.nz/files/Wind%20Generation/Kessels%20Feb%2008.PDF |archive-date=2013-02-06 |url-status=dead }} {{Clear}} == See also == * [List of lakes in New Zealand](/source/List_of_lakes_in_New_Zealand) * {{section link|Bullock Creek (New Zealand)|The polje}} * [Turlough (lake)](/source/Turlough_(lake)) == Gallery == File:Lake Disappear geology.jpg|Approximate maximum extent of Lake Disappear in blue, extent of Okete Volcanics in pink. The sinkhole is in the southwest corner of the lake. The stream re-emerges due south, near the foot of the map, disappears for another {{convert|200|m}}, then joins Te Maari Stream and runs into Aotea Harbour. Diagram based on the 1971 one inch (contours in feet) and 1994 GNS 1:50,000 maps - sourced from LINZ. File:Towards Kawhia Rd.JPG|The lava flow which blocked the Pakihi Valley is in the background. File:Pakihi Stream runs into sinkhole .JPG|The [sinkhole](/source/sinkhole) where Lake Disappear drains. The mud marks the normal height of the lake. File:Pakihi Stream re-emerges.JPG|Pakihi Stream re-emerges from its {{convert|1|km}} underground segment with just a few ripples. File:Lake Disappear.jpg|Views from Plateau Rd
when dry (7 June 2014) and wet (23 July 2014). == References == {{Reflist}} {{DEFAULTSORT:Disappear, Lake}} Category:Waikato District Category:Lakes of Waikato Category:Lava dammed lakes Category:Intermittent lakes --- Adapted from the Wikipedia article [Lake Disappear](https://en.wikipedia.org/wiki/Lake_Disappear) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Lake_Disappear?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.