I wish to install a low-pressure irrigation drip system that uses the gravity method.

The area is about one (1) rai and I am planning to use/install a 2000 liters overhead water tank in the center of the land.

What is the recommended height of the tank above ground-level in order for the water to drip effectively covering the entire the area of the land?

Might be better with this in the "farming forum" ? Just a suggestion and if you want moved let me know.

51 minutes ago, SouthernDelight said:

I wish to install a low-pressure irrigation drip system that uses the gravity method.

The area is about one (1) rai and I am planning to use/install a 2000 liters overhead water tank in the center of the land.

What is the recommended height of the tank above ground-level in order for the water to drip effectively covering the entire the area of the land?

10m gives you 1 bar static head. 5m (0.5 barg) minimum as long as the land is flat.

Will depend on the flow you need at each point.

 

If you are interested in drip irrigation, the Israeli 's are probably the leaders in this field, I've never researched it but would suggest looking on the net might give you some good info. 

9 hours ago, grollies said:

10m gives you 1 bar static head. 5m (0.5 barg) minimum as long as the land is flat.

Thanks for the brief lesson in hydraulics; I'll be guided accordingly.

10 hours ago, CharlieH said:

Might be better with this in the "farming forum" ? Just a suggestion and if you want moved let me know.

Sorry for not having been more selective in choosing the 'right' forum.
The response from 'grollies' answered my query and there's no need for moving my original post. Thanks for your concern.

for interest only what are you intending to grow  and maybe your estimated cost of 1 rai

of  equipment/materials  cheers

For a successful hydraulic outcome, the design is far more complex than what has been  suggested so far. 

I just took 2 minutes to type in hydraulics for drip irrigation, heaps of good info' including free calculation programs. 

Suggest you look. 

12 minutes ago, Artisi said:

For a successful hydraulic outcome, the design is far more complex than what has been  suggested so far. 

Well, if we were talking about 10 rai + I would agree. I could calc pressure losses using Hazen Williams but for 1 rai is this really necessary?

 

I think the OP just wants a bit of head pressure from his tank, string out some laterals and connect some drippers.

And don't forget, a full 2,000 litre tank weighs TWO TONS, so make sure your tower is up to that.

 

 

23 hours ago, Lamkyong said:

for interest only what are you intending to grow  and maybe your estimated cost of 1 rai

of  equipment/materials  cheers

The mil is growing various veggies and is tending to lemon and guava trees. The current "irrigation" is done by hand - a 'water ring' is surrounding the area'; The 'water ring' accommodates several valves to which water hose are connected to; The water is supplied by the local authorities.

The 'manual' water supply to the land has become to cumbersome and time consuming for the mil.

I intend to purchase a 2000 liter tank, construct a suitable 6m tower with platform, ladder and railing. The water will be supplied via well (already bored) and well pump.

The total cost for me will be in the vicinity of THB 20,000.

19 hours ago, grollies said:

Well, if we were talking about 10 rai + I would agree. I could calc pressure losses using Hazen Williams but for 1 rai is this really necessary?

 

I think the OP just wants a bit of head pressure from his tank, string out some laterals and connect some drippers.

Quite right. This is more or less a hobby for the mil. If there are any 'dry' patches she'll will have to water them the conventional way.

Any particular reason you don't want to / can't pump directly from the bore?

 

Or ground mount your tank and buy another pump with the cash you save on the tower?

 

55 minutes ago, Crossy said:

Any particular reason you don't want to / can't pump directly from the bore?

 

Or ground mount your tank and buy another pump with the cash you save on the tower?

 

Without all the necessary data for a full review, I would think that pumping directly from the well to the o/head tank could probably be more cost efficient than running a second pump.

 

Sure it's only a hobby farm problem but power costs are power costs and without a proper hydraulic / establishment cost study  - who really knows that the best answer is ----  but you may be right, a BHT 3 / 4000 pump plus a few hundred Bht a month extra for power might be the way to go depending on monthly / yearly usage verses the cost of a tower,  on the other hand --  possibly irrigating direct from the well pump could be an option.     

19 hours ago, Crossy said:

Any particular reason you don't want to / can't pump directly from the bore?

 

Or ground mount your tank and buy another pump with the cash you save on the tower?

 

Mainly 'KISS' as mil will be the sole user of the system and I am unsure of the water capacity the bore 'pocket' is holding.

 

I believe that the gravity method is in the long run more reliable.

Hello All, if you go to google and play around with your wording,

and then click on the image link at the top of the page and look

till you see what your looking for and go to that site, beats reading

what you looking for.

If you pumping water to the raised tank, it's not that much for just

pumping water for a 3/4 month crop.

Netafim had a program in Africa on gravity drip systems. (About 3M)

You might look at "sustainable drip systems".

rice555

pictures are easier.

rice555