A cikin ra'ayin mutum mai sauƙi, tafkin shi ne wurin da, zaune a cikin rami tare da sanda na kifi, za ka iya kifi a cikin shiru daga muryar wayewa. A wata ma'ana, saboda haka yana da ƙananan laguna marasa suna a duniya ba za a iya kidaya su ba. Amma akwai wasu tafkuna, waxanda suke da sauran teku, saboda girmansu suna da girma sosai. Mafi yawan tafkuna a duniya sune manyan ruwa masu ruwa da tsaki, a kan abin da akwai ainihin hadari da kuma raƙuman ruwa masu tasowa. Wadannan tafkuna masu yawa suna da sabo ne.
Mafi girma tafkin a duniya
Amsar wannan tambayar, wanda shine mafi girma a cikin tafkin, ba abu ne da ba a san ba. Hakika, zaku iya kwatanta tafkin a cikin zurfin, a yanki, a cikin yawan ruwa. Abin ban mamaki shine, watau Caspian Sea, wanda aka yi la'akari da shi a teku, hakika babban tafki ne! Shi ne wanda ke riƙe da wuri a cikin wannan rukuni. Bayan haka, yankunan da ke cikin tafkin mafi girma shine kilomita 371,000 tare da iyakar mita 1025. A farkon karni na karshe, yankinsa ya kasance kilomita dubu 422 kuma a cikin karni na karshe ya karu sosai.
Ko da yake Caspian wani tafkin ne, ruwan da yake cikinsa yana da kyau, amma ba kamar yadda yake cikin teku ba. Akwai babbar tafkin gishiri inda Turai da Asiya suka hadu. Daga arewa zuwa kudu tare da tsawon tsawon tafkin, sauyin yanayi ya bambanta daga subtropical zuwa yanayin na yau da kullum. Bugu da ƙari, adadin abincin Caspian mai sanannen duniya, tafkin yana da wadata a kifi. Musamman akwai mai yawa sturgeon, kuma, daidai da, baki caviar.
Mafi yawan tafkin ruwan tafkin duniya
Mafi girma tafkin ruwa na ruwa shi ne Baikal. Yankin shi ne kilomita 31479. Haka kuma Baikal shine mafi zurfi a duniya - mita 1637. Wannan tudun dutse, wanda ke cikin tudun dutse, yana ciyar da fiye da ƙananan koguna da rivulets. Mafi girma shi ne Selenga, yana sake rabawa rabin rabon ruwa a cikin tafkin. Amma daya daga cikin kogin yana gudana daga Baikal - Angara.
Mafi yawan tafkin ruwa mai mahimmanci a duniya shine mafi zurfi kuma mafi tsabta a duniya. Kuma kyawawan wuraren da ke kewaye ba kawai ba ya ba da kansa ga bayanin. A cikin siffar, Baikal ya kasance kamar wata rana. A cikin idon ruwa, lokacin da tudun ruwa ya wuce, nuna gaskiyar ruwan ya kai mita arba'in cikin zurfin. Wadannan zurfin tsabta suna rayuwa ne da yawa daga nau'in kifaye na ruwa - daga mota na kowa kuma sunyi amfani da kyan kifi da tsutsa.
Bugu da ƙari, kifi, Baikal yana da dabbaccen mahaifa wanda ya dace da ruwa mai tsabta - burin Baikal ko hatimi, kuma tsuntsaye suna zaune a bakin teku. Abin sha'awa shine ruwan da ke cikin tafkin mafi girma yana cikin wasu nau'o'in kifi da tsire-tsire, wanda babu inda, sai dai a nan, ana samun su a cikin sauran ruwa. A cikin 'yan shekarun nan, wasan kwaikwayo na mummunan lahani a Lake Baikal ya zama sananne a cikin' yan yawon bude ido, a gida da kuma kasashen waje.
Jerin manyan laguna a duniya
Akwai irin kwatancin manyan tafkuna. Ya ƙunshi daruruwan lakabi. Yi la'akari kawai da wasu daga cikinsu, wanda girma suna gaske grandiose:
- Kogin Caspian wani tafkin ne wanda ke kan iyakar kasar Rasha, amma yana kusa da wasu ƙasashen Asiya. Sunanta "teku" da aka samu saboda salinity na ruwa, wanda ba shi da ma'ana cikin tafkuna.
- Babban tafkin yana cikin Arewacin Amirka, wato Kanada. Yana kan manyan wuraren da aka gano tun zamanin da. A cikin harshen 'yan asalin Kanada - Indiyawan, sunan yana kama da "babban ruwa".
- Lake Victoria - yana kan Afrika, a Kenya da Tanzaniya. Kogin yana iya yin amfani da shi, kama kifi yana ci gaba a kanta kuma yana da filin shakatawa na kasa.
- Huron shine na biyu mafi girma a cikin tafkin Great Lakes na Arewacin Amirka.
- Michigan - tafkin yana cikin Amurka. Kuma ko da shike yana samar da tsari guda ɗaya tare da Lake Huron a Kanada, an dauke shi rarraba daga ɗayansa kuma ƙarami a girman.
