| Services » Neeru Meeru |
|
| Neeru Meeru |
- Discount on Construction of Rain Water Harvesting Pits.
- Ground Water Recharge calculations.
- Rain Water Harvesting Structure Type Design No. 1
- Diagram for RWH structure (Type - I)
- Rain Water Harvesting Structure Type Design No. 2 & 3
- Diagram for RWH structure (Type - II)
- Diagram for RWH structure (Type - III)
- Utilization of Rainwater in case of Multistoried Complexes.
- Diagram showing the rainwater collection sump & borewell recharge.
- Diagram showing the filtration unit.
- Note
|
| Ground Water Recharge calculations |
|
| I. RWH structure size (1.5 x 1.5 x 2.0) mtrs. |
| 1) |
Rainfall |
2 cm/day |
| 2) |
Roof top area |
14m x 14m (45` x 45`) |
| 3) |
Volume of rain water |
4 cu.m |
| 4) |
Total quantity of rainwater for 50,000 pits for recharge. |
200000 cu.m or 44 Mgd |
| 5) |
If 50 cm rainfall is expected during the monsoon, then the quantity of recharge |
25 x 44 Mgd i.e. 1100Mg |
|
|
| II. RWH structure size (1.0 x 1.0 x 1.5) mtrs. |
| 1) |
Rainfall |
2 cm/day |
| 2) |
Roof top area |
10m x 10m (30` x 30`) |
| 3) |
Volume of rain water |
2 cu.m |
| 4) |
Total quantity of rainwater for 50,000 pits for recharge. |
100000 cu.m or 22Mgd |
|
5) |
If 50 cm rainfall is expected during the monsoon, then the quantity of recharge |
25 x 22Mgd i.e. 550Mg |
|
|
The total quantity of recharge can be expected from 1.00 (L) Rain Water Harvesting
pits is 1100 Mg = 550Mg or 7500 ML.
The total area of Hyderabad is 165 Sq.Km.
The raise in ground water level will be 4.5 cm only from 1.00 (L) rain water harvesting
pits.
Hyderabad city is having 7.00 (L) households. If RWH structures are constructed
we can expect ground water recharge of 7 x 4.5 cm = 31.5 cm.
The roof top area for 7.00 (L) households at 12m x 12m will be 100 Sq.Km.
If 100 mm of water i.e. 0.1m of water during the entire monsoon gets absorbed into
ground the quantity will be 1430 Mg and the raise in ground water is by 3.9 cm on
165 Sq.Km area.
|
| |
|
| |
|
Rain Water Harvesting Structure Type Design No.1 |
|
|
|
(Size : 1.5m x 1.5m x 2.0m) for Ground Water Recharge) |
|
|
|
Cost details for construction of Rain Water Harvesting Structure |
|
|
|
4.5 |
cu.m |
Excavation in Hard Gravelly and all available soils |
Rs. |
418-50 cum |
Rs. |
118.00 |
|
2.25 |
cu.m |
65 mm metal |
Rs. |
284-40 cum |
Rs. |
640.00 |
|
1.25 |
cu.m |
20 mm metal |
Rs. |
626-40 cum |
Rs. |
783.00 |
|
0.675 |
cu.m |
Coarse sand |
Rs. |
332-00 cum |
Rs. |
224.00 |
|
0.24 |
cu.m |
CRS masonry in 1:6 prop. Labour charges for filling and spreading metal and sand
and excavation of trench for PVC RW pipe (2 MM and 1WM for two days) |
Rs. |
1375-25 cum |
Rs. |
330.00 |
|
3 x 2 |
|
87.00 |
522.00 |
|
4.5 |
cu.m |
Carting of excavated earth fpr a lead of 8 km. |
Rs. |
88-00 cum |
Rs. |
396.00 |
|
L.S. |
|
LS for incidental charges and other expenditure. |
Rs. |
LS |
Rs. |
400.00 |
|
|
|
|
|
|
|
3,413.00 |
|
|
|
Add sales tax @4% and rounding |
|
|
Rs. |
87.00 |
|
|
|
|
|
Total |
Rs. |
3,500.00 |
|
NOTE: COST OF RAIN WATER PIPE FROM ROOF AND FIXING WILL BE EXTRA. |
|
|
|
|
| |
|
Rain Water Harvesting Structure Type Design No.2 & 3 |
|
|
|
(Size : 1.0m x 1.0m x 1.5m) for Ground Water Recharge) |
|
|
|
Type Design No.2 is proposed for Medium sized households and Type Design No.3 around
borewell |
|
|
|
Cost details for construction of Rain Water Harvesting Structure |
|
|
|
1.5 |
cu.m |
Excavation in Hard Gravelly and all available soils |
Rs. |
418-50 cum |
Rs. |
63.00 |
|
0.75 |
cu.m |
65 mm metal |
Rs. |
284-40 cum |
Rs. |
213.00 |
|
0.375 |
cu.m |
20 mm metal |
Rs. |
626-40 cum |
Rs. |
235.00 |
|
0.225 |
cu.m |
Coarse sand |
Rs. |
332-00 cum |
Rs. |
75.00 |
|
0.16 |
cu.m |
CRS masonry in 1:6 prop. Labour charges for filling and spreading metal and sand
and excavation of trench for PVC RW pipe (1 MM and 1WM for two days) |
Rs. |
1375-25 cum |
Rs. |
220.00 |
|
3 x 2 |
|
87.00 |
348.00 |
|
1.5 |
cu.m |
Carting of excavated earth fpr a lead of 8 km. |
Rs. |
88-00 cum |
Rs. |
132.00 |
|
L.S. |
|
LS for incidental charges and other expenditure. |
Rs. |
LS |
Rs. |
300.00 |
|
|
|
|
|
|
|
1,586.00 |
|
|
|
Add sales tax @4% and rounding |
|
|
Rs. |
64.00 |
|
|
|
|
|
Total |
Rs. |
1,650.00 |
|
NOTE: COST OF RAIN WATER PIPE FROM ROOF AND FIXING WILL BE EXTRA. |
|
|
|
|
| |
|
UTILIZATION OF RAIN WATER AND RECHARGING OF GROUND WATER THROUGH BOREWELL IN CASE
OF MULTISTORIED COMPLEXES
|
|
The residents of Multistoried Complexes can safely utilize Rain Water for their
Domestic requirements by way of filtering it and collecting into their sump and
also can recharge their borewells. |
|
|
|
Quantity of rain water that can be collected from roof top from 2 cm rain fall per
day for domestic usage.
|
|
|
|
Roof top area in sqm. |
Quantity in cum. |
Litres |
Filter unit |
Size of the unit |
Rate of filtration |
Time taken for discharge |
|
- Small Households |
1 cum |
1,000 |
Type Design No.1 |
0.5m dia, 1.2m ht. |
20 lpm. |
50 min. |
|
- 100 Sqm. |
2 cum |
2,000 |
Type Design No.2 |
1.0m dia, 1.2m ht. |
80 lpm. |
25 to 50 min. |
|
- 150 Sqm |
3 cum |
3,000 |
|
- 200 Sqm |
4 cum |
4,000 |
|
- 500 Sqm |
10 cum |
10,000 |
Type Design No.3 |
1.2m dia, 1.2m ht. |
113 lpm. |
90 to 180 min. |
|
- 1000 Sqm |
20 cum |
20,000 |
|
|
|
|
Construction of Filtration unit - As per diagram annexed Cost for construction
of filtration unit. |
|
|
|
Description |
Type 1 (in Rs.) |
Type 2 (in Rs.) |
Type 3 (in Rs.) |
|
- Laying CC bed in 1:2:4 prop. For the size shown in the diagram.
|
300 |
600 |
700 |
|
- RCC rings 4 Nos. as per diagram
|
400 |
600 |
750 |
|
- Crushed 40mm metal (30cm thick)
|
400 |
800 |
1,000 |
|
- Crushed 20mm metal (15cm thick) |
|
- Grit (Batana) 15cm thick |
|
- Coarse sand (size 0.72mm to 1.0mm) 45cm thick. |
|
- PVC 3" dia perforated pipe of hole size 0.6mm, 10cm c/c to be placed inside the
unit for collection of water and 1" dia and 1' pipe for backwash pumping. |
100 |
200 |
250 |
|
- 3" dia PVC rain water carrying pipe upto filtration unit and to sump and as well
as connecting to borewell casing pipe as per site condition including labour charges
and fixing charges etc., (Approximately for One floor).
|
1,000 |
1,000 |
1,000 |
|
- Other incidental charges and transportation etc.
|
300 |
300 |
300 |
|
Grand Total Rs. |
2,500
|
3,500 |
4,000 |
|
|
|
|
| |
 |
|
|
|
| |
 |
|
|
|
| |
 |
|
|
 |
|
|
 |
|
|
|
| |