1. QuruQlik suvlari hosil bo‘lishining

Ishni bajarish maqsadida qo’yilgan vazifalar
1. Daryo havzasi yoki ma’lum hududda hosil bo’ladigan mehyoriy suv sarfi(Q₀) berilgan bo’lsa, oqim hajmi(W₀), oqim moduli (M₀), oqim qalinligi(U₀) hamda oqim koeffitsienti (h₀) hisoblansin;
2. Daryo havzasi yoki ma’lum hududda hosil bo’ladigan oqim hajmi(W₀) berilgan bo’lsa, mehyoriy suv sarfi(Q₀), oqim moduli (M₀), oqim qalinligi(U₀) hamda oqim koeffitsienti (h₀) hisoblansin;
3. Daryo havzasi yoki ma’lum hududda hosil bo’ladigan oqim moduli (M₀) berilgan bo’lsa, mehyoriy suv sarfi(Q₀), oqim hajmi(W₀), oqim qalinligi(U₀) hamda oqim koeffi­tsienti (h₀) hisoblansin;
4. Daryo havzasi yoki ma’lum hududda hosil bo’ladigan oqim qalinligi(U₀) berilgan bo’lsa, mehyoriy suv sarfi(Q₀), oqim hajmi(W₀), oqim moduli (M₀) hamda oqim koeffitsienti (h₀) hisoblansin;
5. Daryo havzasi yoki ma’lum hududda hosil bo’ladigan oqim koeffitsienti (h₀) berilgan bo’lsa, mehyoriy suv sarfi(Q₀), oqim hajmi(W₀), oqim moduli (M₀), oqim qalinligi(U₀) hisoblansin.
6. Hisoblashlar natijalari tahlil etilsin.


Ishni bajarish tartibi
1. Daryo havzasi yoki ma’lum hududda hosil bo’ladigan mehyoriy suv sarfi(Q₀) berilgan bo’lsa, oqim hajmi(W₀), oqim moduli (M₀), oqim qalinligi(U₀) hamda oqim koeffitsienti (h₀)ni hisoblash.
Ushbu masalani echishni 5.4-jadvalda keltirilgan Amudaryo misolida bajaramiz:
1) Amudaryoning yillik mehyoriy oqim hajmi(W₀)ni hisoblash:

W₀ = Q₀ · T_y = 1960 m³/sek · 31,54 · 10⁶ sek = 61,8 km³;

2) oqim moduli(M₀)ni hisoblash:

M₀ = ;

3) oqim qalinligi(U₀)ni hisoblash:

4) oqim koeffitsienti(h₀)ni hisoblash:

2. Daryo havzasi yoki ma’lum hududda hosil bo’ladigan oqim hajmi(W₀) berilgan bo’lsa, mehyoriy suv sarfi(Q₀), oqim moduli(M₀), oqim qalinligi(U₀) hamda oqim koeffitsienti (h₀)ni hisoblash.
Ushbu masalani 5.4-jadvalda keltirilgan Osiyo qithasi misolida echamiz:

1. 
   Osiyo qithasi daryolarining yig’indi yillik mehyoriy suv sarfini hisoblash:
   

Q₀ =

2. 
   oqim moduli(M₀)ni hisoblash:
   

;

3) oqim qalinligi(U₀)ni hisoblash:

U₀ =

4) oqim koeffitsienti(h₀)ni hisoblash:

3. Daryo havzasi yoki ma’lum hududda hosil bo’ladigan oqim moduli (M₀) berilgan bo’lsa, mehyoriy suv sarfi(Q₀), oqim hajmi(W₀), oqim qalinligi(U₀) hamda oqim koeffitsienti (h₀)ni hisoblash.
Ushbu masalani echishni 5.4-jadvalda keltirilgan Kamchatka daryosi misolida amalga oshiramiz:
1) Kamchatka daryosining yillik mehyoriy suv sarfini hisoblash:

Q₀ =

2) yillik mehyoriy oqim hajmi(W₀)ni hisoblash:

W₀ = Q₀ · T_y = 1013,6 m³/sek · 31,54 · 10⁶ sek = 31,97 km³;

3) oqim qalinligi(U₀)ni hisoblash:

4) oqim koeffitsienti(h₀)ni hisoblash:

h₀ = _{ }

4. Daryo havzasi yoki ma’lum hududda hosil bo’ladigan oqim qalinligi(U₀) berilgan bo’lsa, mehyoriy suv sarfi(Q₀), oqim hajmi(W₀), oqim moduli (M₀) hamda oqim koeffitsienti (h₀)ni hisoblash.
Ushbu masalani echishni jadvalda keltirilgan Amur daryosi misolida amalga oshiramiz:
1) Amur daryosining yillik mehyoriy oqim hajmi(W₀) ni hisoblash:

W₀ = F · U₀ = 1855 · 10³ km² · 191 mm = 1855 · 10³ km² · 191 · 10^-6 km = 354,3 km³ ;

2) yillik mehyoriy suv sarfini hisoblash:

Q₀ = _{ }

3) oqim moduli(M₀)ni hisoblash:

M₀ = _{ }

4) oqim koeffitsienti(h₀)ni hisoblash. Dastlab hajm birligida berilgan yog’in miqdorini uzunlik birligida ifodalangan yog’in qatlamiga aylantirish lozim:

X₀ =

YOg’in miqdorining uzunlik birligida ifodalangan qiymati, yahni yog’in qatlami ma’lum bo’lgach, oqim koeffi­tsientini yuqoridagi kabi hisoblaymiz:

h₀ = _{ }