Alternative

2.2
2.1

R
O
crops kind

Planting area (ha)

1.0 R 2500
1.0 R 2500

833
833

3.2 O 1250
3.1 O 2500
2.3 R 1250
O 1250
R 1250
1.1 R 2500
A=Σ(kind)

5
5
Possible crop production volume

3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
(ton/ha/cycle)

B Farmer's selling price

700
700
700
700
700
700
($/ton)

1,000
1,000
1000
1000
c=A* area*B
Total income

3.1
6.1
3.1
2.9
2.0
4.4
4.4
8.8
8.8
8.8
($/cycle)

1
1
1
1
1
1
1
1
1
2
cycle Planed cultivation cycle

period (month) period for one cycle

4.0
4.0
3.5
4.0
3.5
4.0
3.5
3.5
3.5
3.5
Assumption

C=c*cycle Total income per year

3.1
6.1
3.1
2.9
2.0
4.4
4.4
8.8
8.8
17.5
($/cycle)

0.2
0.2
0.2
0.2
(lit/sec/ha) Required water in a second

1.5
1.5
1.5
1.5
1.5
1.5
D=Σ(kind) Total required water in a month

518
518
518
518

3,888
3,888
3,888
3,888
3,888
3,888
(m3/month/ha)

(m3/sec) Average river water flow per month

6.0

0.6
period for one cycle

E
Farmer's selling price

Average river water flow per month

1.6
15.6 (mil m3/month)
Average river water flow
Production cost for crops
Required water in a second

F=E- D*area Shortage of water in dry month

0.9
0.3
1.1
0.9
5.8
5.8

-3.3
-1.7
-3.3
-8.2
Possible crop production volume

(mil m3/month)

(million m3) Reuired reservior volume

0.0
0.0
0.0
8.8
0.0
0.0
0.0

17.4
17.4
42.9

G Total construction cost

10
10
10
10

410
220
410
300
300
300

(mil $) for necessary facilities

0 Facility cost per month

0
6
0
3
0
6
4
4
4

H=G/20/period
Rice
Rice
Rice
Rice
Rice

(mil $/month) during 20 years

Rainy s

0.0015
3888
 rice 500 3
3.5 others 5 (ton/ha/cycle) candidate for others beans 500 4
3.5 others 4 (month) peanuts 4000 4
1.5 others 0.2 (lit/sec/ha) cassava 500 10
1000 others 500 ($/ton) taro 3000 7
900 others 500 ($/ha/one period) corn 200 4
6 Dry s 0.6 (m3/sec) Water spinach 10000 2
firmer price cycle period
$/ton (month)
Water cost for total area
Water unit cost per m3

Cost for crops

Total cost

B/C
L=(J+K*area*cycle)
J= I*F*period*cycle

($/ha/one period)
I=H*10^6/F

(mil $/year)

M=C/L
(mil $)
($/m3)

- 0 900 4.5 3.89 OK

- 0 900 2.3 3.89 OK
0.52 15 900 17.3 0.51 No
1.77 21 900 21.6 0.20 No
0.39
- 0 500 0.6 7.00 OK
1.87 11 900 11.7 0.17 No
0.41
- 0 500 0.4 7.00 OK
1.77 21 900 21.6 0.14 No
- 0 500 1.3 4.90 OK
- 0 500 0.6 4.90 OK

3888
 300 100 3700
1000 50 2500
500 50 1000
400 66 500 30t/ha
500 50 500
1000 50 500
100 50
production cost $/10a necessary production
kg/10a water
ton/ton
LAND NEED FOR DAM CONSTRUCTIONS

1 Lake Area Identification

2 Borrow Area
3 Acces Road
 November December January February March
Product
1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3
Rainfall Data (mm) 185 377 355 392 361
Paddy

Cassava

peanut

Corn

People
Animal (Pigs and
Cattle)
March April May June July August Sempember
4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3
361 271 365 264 158 47 42
Sempember October
4 1 2 3 4
42 67
No Product area Production Production Production Selling Price
(A) (B) C =A X B Cost (US$) (US$)
1 Paddy (2 Cycle) 2500 3 ton/ha 15000000 Kg 0.25 /kg 0.85
2 Cassava 100 125 ton/ha 12500000 ton 0.15 /kg 0.5
3 Corn 1500 6 ton/ha 9000000 kg 0.15 /kg 0.6
4 Peanut 1000 2 ton/ha 2000000 ton 0.15 /kg 0.6
5 Drinking Water 2 1000000 m3 1000000 M3 0.1 /M3 0.7
6 Animal Production 5 4000 head/year 4000 head 200 /hd 450
8 Recreational 2 30000 head/year 30000 head 0.1 /hd 1
TOTAL REVENUE

Note cost production = $ 8,178,000.00

Benefit = $19,952,000.00
B/C = 2.43971631205674
Selling Price Revenue (US$)
(US$)
/kh $9,000,000.00
/kg $4,375,000.00
/kg $4,050,000.00
/kg $900,000.00
/m3 $600,000.00
/hd $1,000,000.00
/hd $27,000.00
$19,952,000.00

$ 3,750,000.00
$ 1,875,000.00
$ 1,350,000.00
$ 300,000.00
$ 100,000.00
$ 800,000.00
$ 3,000.00
$ 8,178,000.00