Ndị nyocha Mahadum Washington State ga-enyocha ihe onyonyo karịrị afọ 20 iji mata ma usoro ọrụ ugbo nke ịkụ mkpụrụ abụọ na-abawanye na steeti ahụ.
N'iji onyinye $100,000 sitere na NASA Jet Propulsion Lab's Western Water Applications Office, ndị ọkà mmụta sayensị Washington State University (WSU) ga-eji igwe mmụta igwe mụọ ihe onyonyo satịlaịtị na mbọ iji mụta ma ọ bụrụ na mgbanwe ihu igwe na ogologo oge na-eto eto na-ekwe ka ndị ọrụ ugbo na-akụ ihe ọkụkụ abụọ. n'otu oge n'otu ubi.
Mmemme Landsat nke NASA na-ewe ma na-edobe foto nke elu ụwa kwa ụbọchị iri na isii. Maka onyinye ọhụrụ a, Michael Brady, nke WSU's School of Economics Sciences, na Kirti Rajagopalan, Department of Biological Systems Engineering, ga-eji ihe oyiyi nke etiti na ọwụwa anyanwụ Washington chọọ ihe ịrịba ama nke mmụba na okpukpu abụọ. Mingliang Liu na Claudio Stockle sitere na WSU na Perry Beale sitere na Ngalaba Agriculture nke Washington bụ ndị na-emekọ ihe ọnụ. Ọrụ a na-ewulite site na onyinye mkpụrụ sitere na State of Washington Water Research Center.
"N'ime afọ 50 gara aga ma ọ bụ karịa, oge na-eto eto maka ugbo ugbo na Washington abawanyela site na izu abụọ ruo atọ," Brady kwuru. "N'ime oge na-eto eto karịa, ọ na-adịkarịrị ndị na-akụ ihe nwere ike ịkọ, itolite na iwe ihe ubi ugboro abụọ n'otu afọ."
Mmụba nke mmepụta ahụ chọrọ mmiri ka ukwuu, nke bụ ebe echiche maka ọmụmụ ihe a sitere. Ụlọ ọrụ Washington State Department of Ecology's Office of Columbia River chọrọ ịma ma ọ bụrụ na ịkụ mkpụrụ okpukpu abụọ na-ewu ewu n'ihi na nke ahụ ga-emetụta oke mmiri dị maka ọrụ ugbo.
Brady kwuru, "Mkpụrụ osisi okpukpu abụọ na-eji mmiri dị ukwuu karịa itolite na iweta otu ihe ọkụkụ." "Mana enwebeghị ụzọ isi hụ ndị na-akụ mkpụrụ na-akụ mkpụrụ okpukpu abụọ ugbu a, ma ọbụghị ole ka ọ na-abawanye."
Nke ahụ bụ ebe onyonyo satịlaịtị NASA na-abata. N'iji mmụta igwe, ndị nyocha ahụ ga-elele foto nke ubi n'otu n'otu wee tụọ ka ha si dị ndụ ndụ.
N'ihe onyonyo satịlaịtị, ubi nke na-amalite oge ntolite na-acha aja aja ma jiri nwayọọ nwayọọ na-acha akwụkwọ ndụ akwụkwọ ndụ, wee ghọọ aja aja ọzọ, na-esotekwa okirikiri ọzọ nke ịba ụba akwụkwọ ndụ akwụkwọ ndụ nwere ike ịgbaji okpukpu abụọ. Otu ubi a kụrụ akụ ga-egosi naanị otu okirikiri nke agba agba ndụ ndụ na-abawanye, na-esote aja aja ruo oge ọzọ, Brady kwuru.
Brady kwuru, "Enweghị ụzọ mmadụ, ma ọ bụ mmadụ iri na abụọ, nwere ike lelee foto niile nke ubi ndị ahụ ihe karịrị afọ 20." "Ma site n'iji mmụta igwe, anyị nwere ike ịhụ ole ihe ọkụkụ okpukpu abụọ abawanyela n'ubi nke ọ bụla n'ime afọ iri abụọ."
Ebumnobi bụ iji afọ iri abụọ gara aga buru amụma ole ihe ọkụkụ okpukpu abụọ ga-abawanye n'ime afọ iri ma ọ bụ karịa na-abịa. Ndị nyocha ahụ ga-elelekwa otu data ahụ maka akụkụ California na Arizona, nke na-enwekarị ihe ọkụkụ okpukpu abụọ n'ihi ogologo oge na-eto eto.
"Ka anyị na-amalite inwe ihu igwe yiri akụkụ nke California, anyị nwere ike ịhụ mmepụta ihe oriri na-agbanwe na ihe e mere na mpaghara ndị ahụ," Brady kwuru.
Nke ahụ nwere ike inwe mmetụta dị ukwuu na ikike mmiri maka ndị ọrụ ugbo na Columbia River Basin. Brady nwere olile anya na onyinye a ga-enyere ndị na-eme mkpebi aka inwekwu data ka ha wee nwee ike ịhazi maka mmụba ojiji mmiri nwere ike.
"Mkpụrụ osisi okpukpu abụọ bụ otu ụzọ nwere ike isi nyere aka belata mmetụta mgbanwe ihu igwe na mmepụta nri," Brady kwuru. Mana anyị kwesịrị ime atụmatụ maka iji mmiri eme ihe. Ọrụ a bụ nzọụkwụ mbụ dị mma na usoro a. "- Scott Weybright, Mahadum Washington State