calcium, thiab magnesium nyob rau hauv av • lub rooj dej siab • tus nqi siab ntawm evaporation • tsis tshua muaj dej nag txhua xyoo Nyob rau hauv ib cheeb tsam semiarid, salinization feem ntau tshwm sim ntawm cov rims ntawm kev nyuaj siab thiab cov ntug dej, ntawm lub hauv paus ntawm toj roob hauv pes, thiab hauv tiaj tiaj, thaj chaw qis qis ib puag ncig sloughs thiab cov dej ntiav.
Salinization feem ntau nyob qhov twg?
Mapping salinization
Tag nrho 20% ntawm tag nrho cov irrigated cheeb tsam yog kwv yees tias yuav raug ntsev, feem ntau nyob rau hauv intensive cultivated cheeb tsam ntawm India, Pakistan, Tuam Tshoj, Iraq thiab Iran. Cov cheeb tsam uas muaj kev pheej hmoo yuav nce salinization yog Mediterranean Basin, Australia, Central Asia, Middle East thiab Northern Africa.
Salinization pom nyob qhov twg?
Qee qhov chaw paub zoo uas tau tshaj tawm cov dej ntsev ntau suav nrog Aral Hiav Txwv Dej (Amu-Darya thiab Syr-Darya River Basins) hauv Central Asia, Indo-Gangetic Basin Hauv Is Nrias teb, Indus Basin hauv Pakistan, Dej Hiav Txwv Dej hauv Suav Teb, Euphrates Basin hauv Syria thiab Iraq, Murray-Darling Basin hauv …
qhov ntsev tshwm sim thiab vim li cas?
Primary salinity tshwm sim hauv av thiab dej. Piv txwv ntawm thaj chaw muaj ntsev muaj xws li cov pas dej ntsev, cov pas dej ntsev, cov dej ntsev thiab cov ntsev. Secondary salinity yog s alting uas tshwm sim los ntawm tib neeg kev ua ub no, feem ntau yog av kev loj hlob thiab kev ua liaj ua teb.
Dab tsi ua rau salinisation hauv av?
Ua rau dej ntsev
Cov ntsev tseem nyob hauv qab av thaum dej los ntawm cov nroj tsuag los yog poob rau evaporation. Cov nqi them rov qab hauv cov dej hauv cov dej tuaj yeem siab dua li cov cheeb tsam qhuav vim yog cov dej ntws los ntawm cov dej nag thiab dej. Qhov no ua rau muaj peev xwm ua kom muaj ntsev ntau heev.
