PENGARUN CUBAN NUJAN
TERNADAP
INLFlLTRWSl
PABA TANAH BERBUKA
Y U S U F F
23.0679
1991
FAKULTAS
TEKNOLOGI
PERTANIAN
INSTITUT PERTANlAN
BOGOR
YUSUF F 2 3 . 0 6 7 9 . P e n g a r u h C u r a h H u j a n T e r h a d a p I n f i l -
t r a s i P a d a T a n a h T e r b u k a .
Dibawah b i m b i n g a n I R
.
SUKANDI SUKARTAATMADJA,HS
.
R I N G K e S A N K e t e r b a t a s a n d a n k e t i d a k t e r a t u r a n c u r a h h u j a n s e r i n g m e n j a d i s e b a b p e n u r u n a n d a n k e g a g a l a n u s a h a p e r t a n i a n . B e r b a g a i u s a h a p e r b a i k a n d i t e m p u h g u n a me- n i n g k a t k a n i n t e n s i f i k a s i l a h a n . P e n g a t u r a n j a d w a l t a n a m merupakan s a l a h s a t u c a r a d a l a m u s a h a i n i . S e l a i n i t u u s a h a p e r b a i k a n f i s i k t a n a h j u g a d i l a k u k a n . Penambahan b a h a n o r g a n i k (BO) d i k e t a h u i b e r p e n g a r u h p o s i t i f t e r h a d a p d a y a s i m p a n a i r t a n a h , s e l a i n j u g a menambah k e s u b u r a n t a n a h . P e n e l i t i a n i n i b e r t u j u a n m e m p e l a j a r i p e n g a r u h c u r a h h u j a n t e r h a d a p i n f i l t r a s i p a d a t a n a h t e r b u k a y a n g d i b e r i b a h a n o r g a n i k ( k o t o r a n h e w a n ) . U n t u k k o n d i s i h i d r o l o g i p a r a m e t e r - p a r a m e t e r y a n g p e n t i n g d a r i k a r a k t e r i s t i k c u r a h h u j a n a d a l a h i n t e n s i - t a s , f r e k u e n s i d a n l u a s d a e r a h p e n y e b a r a n n y a . J u m l a h a i r y a n g masuk k e d a l a m t a n a h d i p e n g a r u h i o l e h s i f a t f i s i k t a n a h , k a d a r a i r m u l a - m u l a , d a n c u r a h h u j a n y a n g j a t u h d i a t a s n y a . Banyak s i f a t f i s i k permukan t a n a h b e r u b a h k a r e n a tumbukan b u t i r - b u t i r h u j a n
.
D a t a c u r a h h u j a n d i p e r o l e h d a r i a n a l i s a CHART OTA No. CR-100-1 d a r i A R R y a n g d i p a s a n g d i l o k a s i p e n e l i - t i a n . J u m l a h i n f i l t r a s i y a n g d i h a s i l k a n s e t i a p c u r a h h u j a n p e r i o d e 24 j a m , d i k e t a h u i s e b a g a i s e l i s i hc u r a h h u j a n y a n g j a t u h d i s u a t u l u a s a n p e n g u k u r a n
d e n g a n t o t a l l i m p a s a n y a n g t e r u k u r . P e n d u g a a n c u r a h
h u j a n t e r i n f i l t r a s i d i l a k u k a n d e n g a n membandingkan
c u r a h h u j a n t e r h a d a p i n f i l t r a s i k u m u l a t i f y a n g d i d a p a t
d a r i a n a l i s a d a t a i n f i l t r a s i p e n g u k u r a n l a p a n g d e n g a n
double
ring infiltrometer
p e r p e r i o d e 15 m e n i t p e r c u r a h h u j a n p e r i o d e 24 j a m , d e n g a n m e m p e r h a t i k a n k a d a r a i r mula-mula. P e n g a r u h c u r a h h u j a n t e r h a d a p i n f i l t r a - s i d i k e t a h u i d a r i a n a l i s a r e g r e s i , y a n g m e l i p u t i u j i k e b e r a r t i a n d a n k o e f i s i e n k o r e l a s i . A n a l i s a d a t a i n f i l t r a s i d a r i p e n g u k u r a n d i l a p a n g , d i p e r o l e h h a s i l p e r s a m a a n P h i l i p t i d a k l a y a k d i g u n a k a n . A n a l i s a d a t a y a n g sama d e n g a n menggunakan p e r s a m a a n K o s t i a k o v d i p e r o l e h p e r s a m a a n i n f i l t r a s i k u m u l a t i f s e b a g a i b e r i k u t :F A l
( t a n p a BO, u l .I )
=
0.780 FA2 ( t a n p a BO, u l . 11)=
0.394t
0.534F B I
(BO ayam, u l . I )=
1.289F~~
(BO
ayam, u l .I L )
=
1.092 t'3.428 FC1 (BO s a p i ,u l .
I ) = 0 . 6 6 3FC2
(BO s a p i , u l . 11)=
1.547 d a r i persa- maan-persamaan t e r s e b u t d i d u g a t o t a l c u r a h h u j a n t e r i n - f i l t r a s i . L f i p e r o l e h h a s i l r a t a - r a t a c u r a h h u j a n t e r i n - f i l t r a s i A ( t a n p a BO)=
601.11,B
(BO ayam)=
792.61, d a n C (BO s a p i )=
500.61. I n E i l t r a s i h a s i l p e n g u k u r a n a d a l a h A ( t a n p aBO)
=
952.71,B
(BO ayam)=
990.91, d a nC (BO s a p i )
=
1 0 1 6 . 7 1 . H a s i l a n a l i s a s t a t i s t i k menun- j u k k a n p e r b e d a a n h a s i l k e d u a m e t o d e t e r s e b u t d a p a t d i t e r i m a . P e r b e d a a n t e r s e b u t d i s e b a b k a n b a t a s k e t e l i - t i a n maksimum d a r i p e n d u g a a n c u r a h h u j a n t e r i n f i l t r a s i u n t a k p e r i o d e 15 m e n i t ( a n a l i s a CHART OTA). U j i k e r a g a m a n m e n u n j u k k a n bahwa c u r a h h u j a n ( 5 5 % b e r p o l a a d v e n c e d ) b e r p e n g a r u h s a n g a t b e r b e d a n y a t a t e r h a d a p i n f i l t r a s i , s e d a n g k a n k e t i g a p e r l a k u a n t a n a h b e r p e n g a r u h t i d a k b e r b e d a n y a t a . Hal i n i d i s e b a b k a n o l e h s e l a n g w a k t u a n t a r a p e m b e r i a n b a h a n o r g a n i k s e b a - g a i p e r l a k u a n t a n a h d a n p e n g a m b i l a n d a t a c u k u plama
(f 2 b u l a n ) . H a s i l u j i r e g r e s i d a r i p e r s a m a a n - p e r s a - maan hubungan c u r a h h u j a n t e r h a d a p i n f i l t r a s i p a d a t a n a h t e r b u k a y a n g d i b e r i b a h a n o r g a n i k ( k o t o r a n hewan) d i p e r o l e h h a s i l t o t a l c u r a h h u j a n b e r p e n g a r u h p o s i t i f - s a n g a t n y a t a , s e d a n g k a n p a r a m e t e r - p a r a m e t e r l a i n n y a b e r p e n g a r u h t i d a k n y a t a . P e n g a r u h c u r a h h u j a n t e r h a d a p i n f i l t r a s i p a d a t a n a h t e r b u k a y a n g d i b e r i b a h a n o r g a n i k (BO k o t o r a n hewan) d i g a m b a r k a n o l e h p e r s a m a a n :lp (80 ayad = 27.911CH t 1.034t
-
0.0241S0 t 0.001E130-
78.546 (R = 0.9901, atau = 41.26XH-
145.661 (R = 0.905)IC
(80 sapi) = 28.495CH + 1.690t 4 0.3751S0 + O.OOIEI;O-
63.679 (R = 0.991), atau = 41.262CH-
119.856 i R = 0.986)P E N G A R U H C U R A H H U J A N T E R H A D A P I N F I L T R A S I P A D A T A N A H T E R B U K A
SKRIPSI
s e b a g a i s a l a h s a t u s y a r a t u n t u k memperoleh g e l a r
SARJBHA TEKNOLOGI PBRTBHIAN
p a d a j u r u s a n HEgLUilISASI PERTANIAN F a k u l t a s T e k n o l o g i P e r t a n i a n I n s t i t u t P e r t a n i a n B o g o r O l e h Y U S U F F 23 0679 1991 I N S T I T U T P E R T A N I A N BQGQR F A K U L T A S T E K N O L O G I P E R T A N I A N B O G O R
INSTITUT PERTANIAN BOGOR FAKULTAS TEKNOLOGI PERTANIAN
P E N G A R U W C U R A H H U J A N T E R H A D A P I N F I L T R A S I P A D A T A N A W T E R B U K A
S K R I F S I
s e b a g a i s a l a h s a t u s y a r a t u n t u k m e m p e r o l e h g e l a r SARJBNB TEKlilDLOGI PERTBNIBN
p a d a j u r u s a n H E W I S A S 1 PERTBNIBtU F a k u l t a s T e k n o l o g i P e r t a n i a n I n s t i t u t P e r t a n i a n B o g o r O l e h Y U S U P
P
23 0679 T a n g g a l l u l u s : 2 1 HE1 1 9 9 1 D i s e t u j u i ,KATA PENGANTAR B i s m i l l a a h i r r a h m a a n i r r a h i i m , A l h a m d u l i l l a h , p u j i s y u k u r p e n u l i s p a n j a t k a n k e h a d i r a t A l l a h SWT. K a r e n a k e k u a t a n . k a r u n i a , d a n r a h m a t A l l a h t a ' a l a s e m a t a s k r i p s i i n i d a p a t d i s e l e s a i - k a n
.
P e n u l i s m e n g u c a p k a n t e r i m a k a s i h k e p a d a : 1. I r . H . S u k a n d i S u k a r t a a t m a d j a , MS s e l a k u d o s e n p e m b i m b i n g.
2 . I r . Y a n u a r J . P . d a n I r . I N e n g a h S u a s t a w a s e l a k u d o s e n p e n g u j i.
3 . Semua p i h a k y a n g m e m b a n t u p e n u l i s b a i k s e c a r a m o r i l rnaupun m a t e r i i l g u n a p e n y u s u n a n s k r i p s i i n i . A k h i r n y a k r i t i k d a n s a r a n u n t u k p e r b a i k a n s k r i p s i i n i d a n p e n u l i s a n s e l a n j u t n y a s a n g a t p e n u l i s p e r l u k a n . B o g o r , Maret 1991 P e n u l i sDAFTAR IS1 h a l a m a n
. . .
KATA PENGANTAR i i i DAFTAR I S 1. . .
i v DAFTAR TABEL. . .
v i. . .
DAFTAR GAMBAR v i i. . .
DAFTAR LAMPIRAN v i i i I.
PENDAHULUAN. . .
1 A.
LATAR BELAKANG. . .
2 B.
TUJUAN.
.
.
.
.
.
.
.
.
.
.
.
3 I1.
TINJAUAN PUSTAKA. . .
4 A.
CURAHHUJAN. . .
4 B.
INFILTRASI.
.
.
.
.
.
.
.
.
.
.
6. . .
C.
A I R TANAH 1 7. . .
1.
P e r g e r a k a n A i r T a n a h 1 7. . .
2.
K a p a s i t a s T a n a h Menyimpan A i r 20. . .
3.
C a r a M e m p e r b e s a r K a p a s i t a s I n f i l t r a s i 20. . .
4.
P e n e t a p a n Kelembaban T a n a h 2 3. . .
I T.
XETODE PEBELITIAN 2 6. . .
A
.
WAKTU DAN TEMPAT 26. . .
B
.
BAHAN DAN ALAT 2 6. . .
C.
METODE PENELITIAN 27. . . .
1.
P e m b u a t a n P l o t d a n P e r l a k u a n T a n a h 27 2.
P e n g u k u r a n d a n A n a l i s a D a t a C u r a H u j a n.
.
2 7 3.
P e n g u k u r a n d a n A n a l i s a D a t a Limpasan.
2 8H a l a m a n 4
.
P e n g u k u r a n I n f i l t r a s i. . .
4
.
P e n d u g a a n C u r a h H u j a n T e r i n f i l t r a s i5
.
H u b u n g a n C u r a h H u j a n d a n I n f i l t r a s i. . .
I V
.
HASIL DAN PEMBAHASANA
.
SIFAT F I S I K TANAH. . .
. . .
B.
CURAHHUJAN. . .
C.
INFILTRASI D.
KELEMBABAN TANAH. . .
E.
CURAH H U J A N TERINFILTRASI. . .
F.
HUBUNGAN CURAH H U J A N DENGAN INFILTRASIV
.
KESIMPULAN DAN SARAN. . .
. . .
A.
KESIMPULAN. . .
B.
SARAN LAMPIRAN. . .
. . .
DAHTAR PUSTAKADaFTAR
