डेल्टा
delta pray: us bhoobhag ko kaha jata hai, jo nadi dvara lae ge avasadoan ke sanchayan se nirmit hata hai. visheshat: nadi ke muhane par, jahaan vah kisi samudr athava jhil mean girati hai. is bhoobhag ka akar sadharanat: tribhuj jaisa hota hai.
nirman tatha vistar
delta ka nirman tatha isaka vistar mukhyat: sagar athava jhil mean pravahit dharaoan ke veg par nirbhar hai. vegavati dharaean athava ooanche jvar, jo nadi dvara ekatrit avasadoan ko tat se door le jate haian, delta nirman mean badhak hote haian aur bahudha lanbe tatiy dvipoan, baluee bhitti ya baluee sanlagn bhitti[1] ka nirman karate haian athava avasadoan ko sagar nital par phaila dete haian. isake viparit dharaoan evan jvaroan ki kshinata delta nirman mean sahayak hai. nadi dvara lae ge avasadoan ka bahooly bhi mahatvapoorn sahayak dasha hai. jvar rahit room sagar tatha meksikoan ki kha di mean delta ki prachurata hai. samudr tat ke ghansane se bhi delta nirman mean badha tatha khule muhanoan[2] ke nirman mean sahayata milati hai.
kanoan ka sanchayan
nadi ke jal ki gati mean kramash: nyoonata ane ke karan delta kshetroan mean sarvapratham b de kanoan ka aur aant mean chhote kanoan ka sanchayan hota hai. ati sookshm kan dharaoan dvara samudr mean door tak pravahit hote haian. is prakar delta ke samudravarti bhag mean chhote kan tatha prishth bhag mean b de kan milate haian.
shakhanadi ka nirman
avasadoan ki adhikata tatha pravah veg ke mand hone ke karan delta kshetr mean nadi ki mukhy dhara anek shakhaoan mean vibhakt ho jati hai, jinhean 'shakhanadi'[3] kahate haian. nirantar avasadoan ke sanchayan se delta bhag kramash: samudr ki or agrasar hota rahata hai. ganga, brahmaputr, hraang ho, nil, po aur misisipi nadiyoan ke delte vishv ke kuchh mahatvapoorn deltoan mean se haian.
udaharan
nil nadi ka delta isaka suandar udaharan hai. jab koee paha di nadi samatal maidani athava pathari pradesh mean pahuanchati hai to jal ke veg mean akasmik kshinata ke karan bhi parvat pad par avasadoan ke kuchh bhag ka nikshepan hota hai. ye nikshep sadharanat: tribhujakar hote haian. inhean 'jalaudh pankha'[4], 'shanku delta'[5] athava 'pankha delta'[6] kahate haian.
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tika tippani aur sandarbh
sanbandhit lekh
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