Matakuliah
Tahun
Versi
: S0634/Hidrologi dan Sumber Daya Air
: 2006
:
Pertemuan 3
Konsep Siklus Hidrologi dan Water
Budget
1
Learning Outcomes
Pada akhir pertemuan ini, diharapkan mahasiswa
akan mampu :
• << TIK-99 >>
• << TIK-99>>
2
Outline Materi
• Materi 1: Siklus hidrologi
• Materi 2: Keseimbangan Air
3
SIKLUS HIDROLOGI
( HYDROLOGIC CYCLE )
4
INTERSEPSI
( interception )
tampungan intersepsi
( interception storage )
5
INFILTRASI
( INFILTRATION )
Limpasan
permukaan
akifer
6
surface runoff >>
baseflow
surface runoff <
baseflow
surface runoff =
baseflow
(hipotetik)
VARIASI DEBIT RATA-RATA MUSIM KEMARAU DAN
MUSIM HUJAN
7
NERACA AIR
( WATER BALANCE )
I1
I2
I = O + ΔS
ΔS
ΔS
ma1
Bila I1 > O
ma0
Bila I2 < O
ma2
O
8
NERACA AIR
( WATER BALANCE )
P
E
SRO
IF
ΔS
WC
GWF
S
P + SRO + IF + GWF = E + WC + S + ΔS
9
SISTEM AKIFER
Permeable layer ( aqufer )
( AQUIFER SYSTEM )
Impermeable layer (aquiclude )
akifer bebas
( unconfined aquifer )
akifer terkekang
( confined aquifer )
L
flowing well
artesian well
10
SIKLUS LIMPASAN
( RUNOFF CYCLE )
FASE I
FIELD CAPACITY
SOIL MOISTURE DEFFICIENCY (SMD)
11
SIKLUS LIMPASAN
( RUNOFF CYCLE )
FASE II
12
SIKLUS LIMPASAN
( RUNOFF CYCLE )
FASE III
13
SIKLUS LIMPASAN
( RUNOFF CYCLE )
FASE IV
14
MODEL
15
MODEL
16
MODEL
17
KONSEP DAN REALITA
18
A
DAERAH ALIRAN SUNGAI (DAS)
X DI A
B
DAS X DI B
C
DAS X DI C
19
A, B, C ADALAH TITIK KONTROL / STA HIDROMETRI