REJIMI OB, bo mururi zamon tagyir yoftani sathu hajmi obi daryo, kul, obanbor va botloqzorro guyand. Rejimi ob payvasta ba obu havo tagyir meyobad. Dar mintaqahoi garm Rejimi ob asosan ba borishot va bukhorshavi vobasta ast, dar mintaqahoi khunuk va mutadil ba harorati havo.
Rejimi obi d ar yo h o dar namudi tagyiroti shaboruzi, dahai, mohona, mavsimivu bisyorsola zohir meshavad va az yak qator davrahoi khose iborat meboshad, ki ba tagyiroti mavsimii sharoiti bo ob tamin budani daryoho vobasta ast. Rejimi ob davrahoi obkhezi, serobi va kamobi dorad. Az sababi nomuntazam budani borishot va befosila ob nashudani barfu yakh daryoho dar davomi sol barobar bo ob tamin nameshavand. Pastu balandshavii sathi ob asosan ba tagyiryobii andozai sarfi ob, inchunin tasiri bod, yakhbandi va faoliyati khojagii odam vobasta ast.
Rejimi obi kulho az rui tanosubi miqdori borishot, bukhorshavi, obhoi ba onho dokhilshavanda va az on jorishavanda, az rui shakl va andozai kul, qonuniyati tagyiryobii maydoni sathi ob, vazishi bod, ki andozai mavjhoro muayyan mekunad va gayra muayyan karda meshavad. Pastu balandshavii sathi obi kul mavsimi, solona va kutohmuddat shuda metavonad.
Rejimi obi botloq ba sharoiti iqlimiyu gidrologi, relefi mahal va nabotot vobasta ast. Inson Rejimi obro toraft beshtar tagyir medihad.
Adabiyot: Ch e b o t a r e v A. I., Obshaya gidrologiya (vodi sushi), Leningrad, 1960.