渠坝
一、CIMATA DAM
Project Location Map
Background
West Java Provincial Government plans to build an international sport center in
Padalarang. As a consequence, a reliable and continuous water supply is needed.
The Saguling Dam would be a logical water source for the area, but presents
problems
at least 3
:
 The water must be pumped
 The water
quality is very poor
 The backflow must be cleaned first
The other logic alternative is by construc-ting a new dam, called Cimeta Dam.
Goal & Objective
 To supply
water for industrial activi-ities, irrigation and domestic activities in
Padalarang and Ngamprah.
 To supply water for International Sport Centre in
Padalarang
 To improve the health level of people in those area
To create a
new tourism object
Existing Condition
Location
Administratively, the location of Cimeta Dam is in Cisarua and Ngamprah District,
Bandung Regency
General Description
The topographical area of the location is hilly. The Cimeta River flows along 39.5 km
from Mount Burangrang to Citarum River, with the watershed area of some 182 km2.The
water of Cimeta River is used mainly
for irrigation of 931 ha paddy fields.
二、CIPANAS DAM
Project Location Map
Background
The Cipanas Dam is planned to fulfil the needs for water for irrigation, domestic
consumption etc., inSumedang and Indramayu regencies.
The estimated water demand in those regencies by 2009 will be 32,700,582.84 liter/day.
It is expected to further increase to 36,059,427.27 liter/day in 2015,
and 45,300,733.7
liter/d Goal & Objective
The Cipanas Dam will be constructed in order to fulfil the demand of irrigation for 7,351
hectares of paddy fields in Sumedang and Indramayu regencies.ay in 2029.
Technical Analysis

Water source

Location
: Sungai Cipanas
- Sub District
: Cibuluh
- District
: Ujungjaya
- Regency


: Sumedang
Hydrology
-
Catchment area : 63,31 km2
-
Flow of main river : 6,2 m3/sec
Dam
- Maximum elevation : +130,50 m dpl
- Effective capacity : 120 million m3
- Storage capacity : 14,80 million m3
: 7,95 km2
- Water area

Dam construction
- Type : zone earth fill, central core
- Volume : 0,714525 million m3



Spillway
-
Location : right abutment
-
Type
-
Peak elevation : 132 m
: Gated concrete gravity crest, chute and flop bucket
Service Intake
-
Type
-
: concrete pipe
Capacity : 6,519 m3/sec
Service Gate
-
Width
:6m
- Length : 7 m

Channel
-
Location
-
: Right abutment
Type
-
Capacity : 405,89 m3/sec
-
Diameter : 5,00 m
-
Length : 226,00 m
: circular, concrete lined
Invert level : 90,00 m
Financial Analysis
The estimated revenue tariffs are :
Water
: 5.6 USD//m3
Irrigation : 55.6 USD/hectares/year
Estimated cost of construction is :
6.8 M USD
The resume of financial analysis :
- B/C Ratio : 1,43
- IRR
: 16,69%
- NPV
: 2.4 M USD
三、SADAWARNA DAM
Project Location Map
Background
The Sadawarna dam will be built to fulfil the needs of water for the Subang and Indrama-yu
Regencies.
The location of dam will cover Cipunegara river basin, at the borderline of Subang and
Indramayu Regenc
Goal & Objective
 To supply raw water for industrial,
commercial and domestic activities in
Subang, with 0.767 m3/sec of flow.
 To supply water for irration, which will
cover 8,210 hectares of paddy fields.
 Electricity Power Plant
 Tourism activity
 To construct water conservation area
Technical Analysis

Water source : The Cipunegara River

Location





-
Sub District : Sadawarna
-
District
-
Regency
: Cibogo
: Subang
Hydrology
: 347,13 km2
-
Catchment area
-
Flow of main river : 18,832 m3/sec
Dam
-
Maximum elevation : +80,50 m
-
Normal elevation : +78,50 m dpl
-
Minimum elevation : +60,00 m dpl
-
Effective capacity (at 78,50 m of elev.) : 53,50 million m3
-
Area of water (at 93,00 m dpl) : 4,10 km2
Dam construction
-
Type : Earth dam
-
Length : 185,00 m
-
Width : 8 m
-
Peak elevation : +98 m dpl
Spillway
-
Location : left abutment
-
Type : Gated concrete gravity crest, chute and flop bucket
-
Capacity : 358,00 m3/sec
-
Peak elevation : 78,50 m
-
Length : 50,00 m
Service Intake


-
Type : Concrete pipe
-
Capacity : 8,947 m3/sec
Service Gate
-
Width : 2,00 m
-
Length : 2,00 m
Channel
-
Location : Left Abutment
-
Type : circular, concrete lined
-
Capacity : 314,70 m3/sec
-
Quantity : 2
-
Diameter : 2,00 m
-
Length : 300,00m
-
invert leve) : 75,50 m dpl
ies.
Service Area of Sadawarna Dam
No.
1.
2.
Lokasi/Location
Luas/Area (Ha)
Areal kiri S. Cipunegara
Left Side of Cipunegara River
Areal kanan S. Cipunegara
Right Side of Cipunegara River
Total
Analisis Finansial
Estimasi
Sadawarna
biaya
Debit/Flow
(Liter/Detik)/(L/sec)
13.535
16.242
16.241
19.490
29.776
35.731
Financial Analysis
pembangunan
adalah
Waduk
sebesar
Rp.
Estimated Cost of the construction:
9.7 M USD
86.854.013.846,-.
Hasil analisis finansial dari pembangunan
Waduk Sadawarna ditunjukkan oleh tabel
berikut.
Resume of Financial Analysis
Tingkat Suku Bunga/
Interest rate
IRR
Net Present Value (NPV)
16%
12%
21,37%
17,21%
Rp. 62.338.062.636,-
Rp. 68.999.564.587,-
6.9 M USD
7.7 M USD
B/C Ratio
1,77
1,84
四、SUKAHURIP DAM
Project Location Map
Background
In order to fulfil the needs of water for irrigation, domestic consumption etc. in Ciamis
regency, river as an important water source needs to be managed and used. The
Sukahurip Dam will be constructed as a solution
to obtain an optimal water use.
The supply of water for The Sukahurip Dam will come from Ciputrapinggan River which
lies in Pangandaran District, Ciamis regency. The river has several tributaries for
example Cimulih River and flows to Indonesian Ocea Goal & Objective
To supply irrigation water for 40,000 hectares of paddy fields in Pangandaran,
industrial activities, domestic activities, electicity, touris Technical Analysis
The technical information of the dam construction :
 The water source : Ciputrapinggan River
 Location
- Sub District : Sukahurip
- District
: Pangandara
- Regency
: Ciamis
 Hydrology
Catchment Area : 39.1 km2
Flow of the main river : 2.34 m3/sec
 Dam
Maximum elevation : 95.06 m
Normal elevation
: 93.00 m
Minimum elevation : 75 m
Normal capacity : 4.426 million m3
Efective capacity : 3 million m3
Area of water : 155.4 thousand m2
 Dam Construction
Type
: Earth dam
Length : 125 m
Width : 8 m
Peak elevation : + 98 m
Volume : 155.4 thousand m3
 Spillway
Location : Left abutment
Type gated concrete gravity crest, chute and flop bucket
Capacity : 222.24 m3/sec
Peak elevation : 93 m
Length : 21 m
 Service Intake
Type : concrete pipe
Capacity : 0.854 m3/sec
 Service Gate
Length : 2 m
m and conservation n
-
Width : 2 m
Channel
Location : Left Abutment
Type
: circular, concrete lined
Capacity : 179.39 m3/sec
Quantity : 2
Diameter : 2 m
Length : 300 m
Invert level : 75.5 m
Financial Analysis
Estimation of revenues /year :
Clean water supply : 778.151 USD
Irrigation : 245.653
USD Estimation of cost :
5.1 M USD
Resume of financial analysis
No.
Condition
I
Discount rate 12%
A
Biaya tetap, benefit tetap
NPV
Biaya naik 20%, benefit tetap
7.213.362,65
801 USD
C
Biaya naik 20%, benefit turun 10%
IRR
1.41
17,45%
1.18
14,20%
1.06
12,77%
1,73
17,45%
1,44
14,20%
1,30
12,77%
14.041.805,89/
1,560 USD
B
B/C Ratio
2.394.960,45
266 M USD
II
Discount rate 10%
A
Biaya tetap, benefit tetap
26.217.405,92
2,913 USD
B
Biaya naik 20%, benefit tetap
19.048.510,05
2,116 USD
C
Biaya naik 20%, benefit turun 10%
12.842.312,52
1,427 USD