Paani ke chakkar

Water cycle, jiske hydrologic cycle, nai to, hydrological cycle ke naam se jaana jaae hae, duniya bhar me jon paani hae uu kaise aapan ruup bdlae hae, ke bola jaae hae. Jab ke duniya me kul milae ke ketna paani hae badle nai hai, lekin ii paani ice, fresh water, salt water aur atmospheric water me me rahe sake hae. Paani ek form se duusra form me ii process se badle hae; evaporation, sublimation, transpiration, precipitation, infiltration aur surface runoff. Ii karte time, paani solid, liquid, nai to, gas ke form me rahe hae.