Jerin tsarin kogun dangane da tsawonsu

Wannan **jerin kogunan da sukafi kowanne tsayi a Duniya**. Sun haɗa da tsarin kogi da ke da tsayin sama da kilomita .

## Ma'anar tsayi
Akwai abubuwa da dama, kamar tantance tushe,  ganewa ko ma'anar bakin ruwan, da kuma ma'aunin gwaji, na tsawon kogin tsakanin tushe da baki, waɗanda ke ƙayyade ma'anar "tsayin kogi". Sakamakon haka, ma'aunin gwada koguna da yawa sun kasance mafi yawansu kintatawa ne (duba kuma paradox na bakin ruwa). Musamman, da kuma alama akwai sabani game da kogin da yafi kowanne tsayi a duniya a tsakanin kogin Nilu ko Amazon A al'adance ana la'akari da kogin Nilu ya fi tsayi, amma a cikin shekarar 2007 da 2008 wasu masana kimiyya sun yi iƙirarin cewa Amazon ya fi tsayi  ta hanyar auna kogin tare da maƙwabtan Pará da ke kusa da tashar ruwa mafi tsayi. Wani labarin da aka yi bita wanda aka buga a shekara ta 2009 a cikin *International Journal of Digital Earth* ya kammala cewa kogin Nilu ya fi tsayi.

Ko da idan akwai taswirori dalla-dalla, ma'aunin tsayi ba koyaushe yake zama daidai ba. Kogin yana iya samun tashoshi da yawa, ko anabranches. Tsawon zai iya dogara ne akan ko an auna tsakiya ko gefen kogin. Wataƙila ba a bayyana yadda za a auna tsawon ta tafki ko rijiyoyi ba. Canje-canje na yanayi da na shekara-shekara na iya canza koguna da tafkuna. Sauran abubuwan da za su iya canza tsawon kogin sun hada da zagayowar zaizayar kasa da ambaliya, madatsun ruwa, lefes, da kuma tashoshi. Bugu da ƙari, tsayin ma'ana zai iya canzawa sosai a tsawon lokaci saboda cutoffs daga Allah ko kuma wanda mutum yayi, lokacin da wani sabon tashar ya yanke a kan ƙasa, yana ƙetare babban kogi mai lankwasa. Misali, saboda cutoffs 18 da aka kirkira tsakanin 1766 da 1885, tsawon kogin Mississippi daga Alkahira, Illinois zuwa New Orleans, Louisiana, an rage shi da . 

Waɗannan wurare suna sa yayi wahala, watakila ma ba zai yiwu ba, don samun daidaitaccen ma'auni na tsawon kogi. Bambancin daidai da asali kuma yana sa wahalar yin kwatancen tsayi tsakanin koguna daban-daban ba tare da an samu sabani ba.

## Jerin tsarin kogin ya fi tsayin kilomita 1,000
Ga mafi yawan koguna, kafofin daban-daban sun bayar bayanai masu karo da juna kan tsawon kogunansu. Bayanin da ke cikin tushe daban-daban yana tsakanin *alamar baka.*

### Bayanan kula

Duk tsawon kogin da akayiwa alamar *asterisk (*)*  to ya kasance matsakaicin tsawo da kafofi daban-daban suke bayar. Idan kuwa akwai bambanci sosai a tsakanin bayanan da kafofif daban-daba n suka bayar, to an lissafosu duka. Amma idan kuwa tsayi da kafofi na mataki na biyu suka bayara sun zama daya, to ana sanya matsakaicinsu sannan kuma ayi masa alamar *asterick*.
*Masana kimiyya sunyi sabani akan wani kogi ne yafi kowanne tsawo a duniya. A al'adance, ana daukar Kogin Nile a matsayin mafi tsayi, amma bayanan kwana-kwanan nan sun nuna cewa Kogin Amazon na iya fin shi tsayi. Bambanci a tsakanin tsayin Kogin Amazon ya danganta ne daga cewa ko za'a sanya sashin Ilha de Marajó da ke gabar Kogin Amazon a matsayin bangare na Amazon, ko kuma a matsayin bangare na daban na sashin Kogin Tocantins.[Sabbin hujjoji da suka soma daga (ranar 16 June 2007) wanda aka samo daga [Andes], ya nuna cewa Amazon yafi Nile tsayi da kilomita 100km, da kan ruwanta mafi tsayi a koramar *Carhuasanta*, wacce ta soma daga kudanci Peru, a yankin arewacin dutsen Nevado Mismi sannan yana kwarara zuwa cikin Río Apurímac. Amma kuma, an riga an san asalin Nevado Mismi tun tsawon shekaru goma da suka gabata (see Jacek Palkiewicz), sannan kuma ma'auni da aka gwada ta tauraron dan-Adam daga wannan wuri zuwa gabar Amazon ya bada akalla abun da bai wuce kilomita 6,400km ba.
*Gabaki daya anyi amfani da sunayen kogunan na yau da kullum. Yawancin sunayen sun kasance sunaye ne na gargajiya na harshe ko kuma anyi amfani da kwatankwanci sunan.

## Kara dubawa
* Lists of rivers
* List of drainage basins by area
* List of rivers by discharge
* List of river films and television series

## Manazarta