Dam na tara Ruwa na Arewa

**Dam din Enclosure Dam na Arewacin Turai** (NEED) wani shiri ne da aka tsara don magance matsalar hauhawar matakan teku a Arewacin Turai. Zai zama wani megaproject, wanda ya shafi gina manyan madatsun ruwa guda biyu a cikin tashar Turanci da Tekun Arewa; na farko tsakanin Faransa da Ingila, na biyu kuma tsakanin Scotland da Norway. Masanin ilimin teku Sjoerd Groeskamp da Joakim Kjellsson ne suka yi tunanin wannan.

Tun daga shekarar 2020, shirin ya kasance gwajin tunani da aka yi niyya don nuna ingantattun hanyoyin magance sauyin yanayi a matsayin "mafi girman gaske" da za a bi. Marubutan shirin sun bayyana shi a matsayin “mafi gargaɗi fiye da mafita”

Groeskamp ya kiyasta cewa NEED zai ci Yuro biliyan 250 zuwa 500 kuma zai ɗauki shekaru 50 zuwa 100 don kammalawa. Groeskamp, masanin binciken teku, bai bayyana yadda ya tantance farashin farashi ko jadawalin gini ba.

## Hanyoyin ruwan dam
Yankin kudancin (NEED South) zai zama dam guda ɗaya a fadin Channel tsakanin The Lizard, Cornwall, Ingila a arewa da Plouescat, Ploudalmézeau, Brittany, Faransa a kudu. Tsawon da aka ƙayyade shine kilomita 161 (mita 100), tare da matsakaicin zurfin kusan mita 85 (279 ft) da matsakaicin zurfin mita 102 (335 ft).

### Dam ruwan Tekun Arewa
Yankin arewa (NEED North) zai zama madatsar ruwa mai yawa a kewayen arewacin bakin Tekun Arewa. Ba a bayyana cikakken aikin injiniya ba, kodayake wani nau'i na ci gaba da tsari zai iya samar da ababen more rayuwa na kan ƙasa-hanya da/ko layin dogo tsakanin Burtaniya da Norway.

### Scotland - Shetland
Yankin yammacin tekun Arewa Dam zai zama tsibiri mai tsalle, daga babban yankin Scotland a kudu maso yamma, ta hanyar Orkney Island zuwa Shetland a arewa maso gabas, tare da tsayin daka ya kai kilomita 145.

Asalin farko a Duncansby Head, Caithness, babban yankin Scotland da ketare Pentland Firth zuwa Brough Ness, ƙarshen kudancin Ronaldsay a cikin Tsibirin Orkney. Ko da yake kasancewar kunkuntar mashigar kilomita 10, benen tekun ya ragu zuwa zurfin mita 100.

Matsakaicin ta kudancin Orkney ya ci gaba zuwa Burray, a kan kunkuntar Skerry Sound zuwa Mainland kuma ya wuce nisan kilomita 4 da zurfin Shapinsay Sound zuwa Shapinsay. Daga gefen arewacin Ness na Ork, faɗin kilomita 6 da zurfin m 110 Stronsay Firth an ketare zuwa War Ness, ƙarshen ƙarshen Eday. Tsayin ta arewacin Orkney yana ci gaba zuwa gabas sama da faɗin kilomita 2 da zurfin 22 m Eday Sound zuwa Sanday. Daga gefen arewacin Tofts Ness, fadin kilomita 4 da zurfin 20 m North Ronaldsay Firth an ketare zuwa Strom Ness a Arewacin Ronaldsay, arewa maso yammacin tsibirin Orkney.

Ketare tashar Fair Isle Channel, tsakanin Dennis Head, North Ronaldsey da Scat Ness, kudu maso kudu na Mainland, Shetland, zai zama farkon bude ruwa na Dam Tekun Arewa, tare da nisa daidai 80 km da zurfin ruwa zuwa 110 m. Dam ɗin da ke kan mafi ɗan gajeren tazara tsakanin tsibiran guda biyu zai bar Fair Isle da aka sanya a cikin shingen.

### Shetland - Yammacin Norway
Sashin gabas na Dam Tekun Arewa zai ba da babban kalubalen injiniya na duk aikin NEED, wanda aka tsara tsawon kilomita 331 ta hanyar budadden ruwa kuma tare da zurfin tekun da ke sama da 300 m a cikin ramin Norway.

Dam din zai samo asali ne daga gabacin gabar tekun Mainland, Shetland, arewa da Lerwick, ya nufi gabas zuwa Bressay da Isle of Noss don ba da damar tsallakawa mafi guntuwar teku zuwa tsibirin Sotra a Hordaland a yammacin gabar tekun Norway.

Teku a gabashin Shetland yana nutsewa zuwa zurfin ƙasa da nisan mil 100 kawai kilomita 1 daga bakin teku, sannan ya ci gaba da fa'ida ta hanyar Bressay Ground da bankin Viking na kusan kilomita 210, har zuwa zurfin zurfin ramin Norwegian. Anan, kasancewar yanki na ƙarshe na mashigar teku, tekun ya kai zurfin zurfin 321 m tsakanin kilomita 5 daga gabar tekun Norway ta yamma inda akwai tudu.

## Manazarta