Sunday, July 27, 2014

Borewell Yield Measurement

Borewell Yield Measurement
A common way to describe the yield of a new borewell is in ‘inches’ measured by the free, unrestrained flow of water from a borewell over a 90 degree ‘V’ notch. The basic principle is that the discharge is directly related to the height of the water level  from the bottom of the V notch.

V Notch Weir.GIF
h - Height of water level from the bottom of the V

Based on certain equations and formulae, the height ‘h’ in inches is converted to discharge rate in litres per hour.
 
The following table indicates the conversion of the yield in ‘inches’ to a discharge rate in litres per hour.

V-Notch Reading in Inches
Approximate Discharge Rate in l.p.h.
Class
1/4
95.4
3/4
261
Low Yield
1
597
1 1/4
1,045.00
1 1/2
1,650.00
Average Yield
1 3/4
2,425.00
2
3,382.00
2 1/4
4,558.80
High Yield
2 1/2
5,919.00
2 3/4
7,501.00
3
9,329.00
3 1/4
11,402.60
Very High Yield
3 1/2
13,720.00
3 3/4
16,284.60
4
19,148.00
4 1/4
22,285.60
4 1/2
28,695.20
4 3/4
29,459.20
5
33,350.00
5 1/4
37,914.00
5 1/2
42,551.00
5 3/4
47,461.00
Superlative Yield
6
52,644.00
6 1/4
58,372.00
6 1/2
64,373.00
6 3/4
70,919.00
7
77,464.00
7 1/4
84,557.00
7 1/2
92,195.00
7 3/4
1,00,105.00
8
1,08,288.00


Source:
http://www.lmnoeng.com/Weirs/vweir.php

31 comments:

Unknown said...

Your information about borewell is really useful. Thanks for sharing this informative article.
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Unknown said...

Dear Sir/Madam,

Your site is giving very good information about water, It is very useful in our dailylife, Now a days due to lack of sufficient water so many people are facing many problems. In this circumstances Borewells in Hyderabad is doing some help to dig and get water. Some of the Borewells in Hyderabad.

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www.borewellshyderabad.blogspot.com

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Unknown said...

thanks for sharing nice blog of borewell

DIVYASHAKTHY SOFTTECH INDIA PVT LTD said...

Great post.
I think best information here. I like it very much
We all are appreciating your blog.
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Unknown said...

Sir common people talks about that i am obtaining 2 or 3 inches of water what do you mean by that inches

Unknown said...

Thanks a lot. Very useful information

Unknown said...

It means sufficient water fo agriculture purpose.

Unknown said...

Dear sir/madam,
Thanks so much for the elaborate explanation about the yield of a bore well and great lot thanks for the ready reckoner from 1/4th inch to 8inches. It has helped us a lot in designing of pumpset also.
Thanks again..

SRIDHAR KS,
Sub divisional Engineer-civil
BSNL,Bengaluru..

Unknown said...

Thanks a lot very useful information & it's useful dailylife

Unknown said...

Good information to all borewell users

Unknown said...

Thanks a lot very useful information

IswaryaSeo said...
This comment has been removed by the author.
IswaryaSeo said...

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Vps nks said...

Your information about borewell is really useful. Thanks for sharing this informative article.
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vairavanborewells said...

Good Service & useful informations.
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ramat gamat said...

Dear sir, My bore is one week old. Fitted pump today and measured 1.25 inches. Will that stay the same henceforth or it would go up or down before settling. Please suggest. If I need to use today's measurement for crop planning purpose.
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SeoIndhu said...

Really awesome blog. Your blog is really useful for me. Thanks for sharing this informative blog. Keep update your blog.
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SeoIndhu said...

Nice blog.Thanks for sharing...
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venkat said...

your blog is giving very good information and keep it up.
tks


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venkat said...

Hi sir you are giving very good infomation to the public.


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Unknown said...

Nice info. but please inform how to find the yield in liters per day i.e. the quantity of water which can be withdrawn in a day and for how many days in an year.

Unknown said...

Very useful information
Pls specify motor pump and HP measurement

sneha said...

Thnq for sharing Good Info
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Unknown said...

Very good information for every one. I want to know the address of person/company find out underground water very accurately.

Unknown said...

Thank you for your water measurement calculation
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Unknown said...

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Unknown said...

Very useful UFO and easy to understand

Unknown said...

Respected sir .,
My question is 1 1/2inch of bore well water is equal to how much of gallonS

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Sri Amman Borewells in madurai said...

Very nice article ��
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Sri Amman Borewells in madurai said...

Thanks for sharing
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