Tsarin Ruwan Ruwan Ruwa na Nubian

Tsarin Ruwan Ruwan Ruwa na Nubian
aquifer (en)
Bayanai
Ƙasa	Libya, Misra, Cadi da Sudan
Wuri
20°N 25°E

Sufuri na sassan bututu don Babban Kogin Man-Made (GMMR) a cikin hamadar Sahara, Libya, a cikin shekarun 1980. Cibiyar sadarwa ta bututu da ke samar da ruwa daga Nubian Sandstone Aquifer System, burbushin ruwa a cikin hamadar Sahara na Libya, GMMR shine aikin ban ruwa mafi girma a duniya.

Tsarin ruwa na Nubian Sandstone (NSAS) shine mafi girman tsarin ruwa na burbushin ruwa a duniya. Tana karkashin kasa a gabashin gabashin hamadar Sahara kuma ta mamaye iyakokin siyasa na kasashe hudu a arewa maso gabashin Afirka.

NSAS ta rufe yankin ƙasa wanda ya kai sama da kilomita miliyan biyu, gami da arewa maso yammacin Sudan, arewa maso gabashin Chadi, kudu maso gabashin Libya, da kuma mafi yawan Masar. Ya ƙunshi kimanin 150,000 km³ na Ruwa kasa, muhimmancin NSAS a matsayin mai amfani da ruwa don shirye-shiryen ci gaba na gaba a cikin waɗannan ƙasashe yana da girma. Babban aikin Man-Made River (GMMR) a Libya yana amfani da tsarin, yana cire ruwa mai yawa daga wannan ruwa, yana cire kimanin ².4 km³ na ruwa mai kyau don amfani da noma a kowace shekara.  

Halaye

Tsarin Ruwan Ruwan Ruwa na Nubian

Tun daga shekara ta 2001, ruwan Nubian Sandstone da ke tsakanin yankunan Toshka da Abu Simbel na Masar ya sami gagarumin tonowa da ci gaba a matsayin wani ɓangare na aikin farfado da ƙasa. An yi amfani da bayanan hakowa don gudanar da karatu iri-iri game da yanayin hydrogeological na yankin.

Sakamakon ya nuna cewa halaye na lithological da saitunan tectonic suna da tasiri sosai a kan tsarin kwararar ruwa da kuma yiwuwar ruwa na yankin gaba ɗaya, wanda ake la'akari da shi kaɗan idan aka kwatanta da yankunan makwabta a gabashin Oweinat ko Dakhla.

Ilimin ƙasa

Ruwan ruwa ya ƙunshi dutse mai tauri mai ƙarfi tare da babban shale da yumɓu, yana da kauri wanda ke tsakanin mita 140 da 230. Nau'in ruwan ƙasa ya bambanta daga sabo zuwa ɗan kauri ( gishirin yana tsakanin 240 zuwa 1300 ppm ). Tsarin ikon ion ya nuna cewa sodium cation ya fi rinjaye fiye da calcium da magnesium - yayin da chloride ya fi rinjaye akan sulfate da bicarbonate . Ruwan ƙasa na asali ne na meteoric (kalmar ruwan meteoric yana nufin ruwan da ya samo asali daga hazo; yawancin ruwan ƙasa asalin meteoric ne).

Babban taro na sodium, chloride, da sulfates suna nuna leaching da rushewa gypsiferous shales da yumɓu, ban da dogon lokaci na zama na ruwa. Reika Yokochi et al. sun gano wurare biyu na sake caji: daya shekaru 38,000 da suka gabata ya samo asali ne daga Bahar Rum, kuma na biyu ya kasance a kusan shekaru 361,000 da suka gabata daga Atlantic mai zafi.

Ayyukan ci gaban kasa da kasa

Tun daga shekara ta 2006, Hukumar Kula da Makamashi ta Duniya tana aiki tare da hadin gwiwar kasashe hudu na NSAS don taimakawa wajen fahimtar matsalolin ruwa ta hanyar aikin Nubian na IAEA-UNDP-GEF . Abokan aikin sun hada da Shirin Ci Gaban Majalisar Dinkin Duniya (UNDP) / Cibiyar Muhalli ta Duniya (GEF), IAEA, Ƙungiyar Ilimi, Kimiyya da Al'adu ta Majalisar Dinkinobho (UNESCO) da wakilan gwamnati daga ƙasashen NSAS. Manufar aikin na dogon lokaci ita ce kafa ingantaccen gudanarwa na NSAS a matsayin hanyar da za a iya inganta ci gaban zamantakewa da tattalin arziki a yankin da kuma kare bambancin halittu da albarkatun ƙasa.

Dubi kuma

• Tafkin Ptolemy
• Lokacin zafi na Afirka