Rain Water Harvesting RWH Calculations

http://www.cgwb.gov.in/documents/RWH_GUIDE.pdf

manual on rain water harvesting Central ground water board

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web site for rain water harvesting

http://www.ccsindia.org/ccsindia/policy/enviro/studies/wp0076.pdf

For example, Delhi, Rajasthan and Gujarat where the total annual rainfall occurs during 3 or 4 months, are examples of places where groundwater recharge is usually practiced.

In places like Assam, Kerala, Mizoram, Tamil Nadu and Bangalore where rain falls throughout the year barring a few dry periods, one can depend on a small sized tank for storing rainwater, since the period between two spells of rain is short. Wherever sub-strata is impermeable recharging will not be feasible. Hence, it would be ideal to opt for storage.

Delhi Jal Board 
Rainwater Harvesting Assistance Cell Varunalaya-I, karol Bagh, New Delhi-110005. 
Ph. 3678380-82 extn. 246,240. 
or 
Officer Incharge, Central Ground Water Board, State Unit Office, Gallery no. 18/11, Jamnagar House, 
Mansingh Road, New Delhi-110011 
e-mail: niccgwb@sansad.nic.in; cgwa@nic.in; cgwa@vsnl.com 
website: www.cgwaindia.com 
Ph. 3384355. Fax. 3386743. 
http://www.delhijalboard.nic.in/djbdocs/consumer/conservation.htm

 
DATA FOR DESIGN::
The following data is required to design a system and evaluate cost of construction
1.Rooftop area in square meter from where rain is to be harvested
2.Rain water drain pipe from the roof to the ground level
3. Drain at ground level to carry the rain water to the injection well
4.Water level at your area to find ot the depth of boring required at your site



Source of the article: http://www.indiawaterportal.org/questions/frequently-asked-questions-faqs-rainwater-harvesting-rwh

http://bangalore.citizenmatters.in/articles/587-rwh-guide

What quantity of rainwater can be collected? 

The rainwater harvested depends upon the catchment area, the rainfall pattern in the area and the drianage/ collection system used. 

To understand the potential for rainwater harvesting, lets take the example of a house in Delhi with a terrace area of 100 sqm. Taking the average annual rainfall in Delhi as 600 mm, and assuming 70% harvesting efficiency (as some rainwater will be lost due to evaporation, collection etc.), we can calculate the amount of water harvested thus:

Volume of water harvested = 100 x 0.6 x 0.7

                                              = 42,000 litres

This volume is more than twice the annual drinking water requirement of a 5-member family, whose average daily drinking water requirement is 10 lpcd.

What should be the depth of a recharge well/pit?

For effective recharge in Bangalore like conditions, a 15-20 feet depth is needed. (Provided you do not hit rock before that depth). If you hit water while digging the pit, you need to ask the workers to be careful while they continue digging. The diameter of the pit you choose depends on two things: space available and the quantity of water you will send in.  A 3 feet dia X 20 feet pit will ‘hold’ around 4000 litres (for recharging the ground). A 5 feet x 30 feet structure can hold 16000 litres.

Talk to an expert 

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Assamese Muslim marriage are different from the rest of India

Source Of The Article :
http://bordoisila.in/axomiya/9-Big-Ways-an-Assamese-Muslim-Marriage-is-Different-From-Rest-of-India.php
Facebook https://www.facebook.com/assamesemuslims/posts/808894972587395

11 unique ways how Assamese Muslim marriage are different from the rest of India. Let's check it out -

(1) Aangothi pindhuwa, the ring ceremony. From here the unique assamese Muslim marriage begins. It's a pre-wedding event, also known as juroon, which happens generally few months before the actual marriage. In this function, a ring is gifted to the bride by her mother inlaw as token of love and to officialy endorse the new relation.

(2) Maah-haalodhi and the bath.

Bathing this way is an age old custom of the Assamese Muslims bride and grooms, in their respective homes. It takes place just a day before Nikaah. Most interesting part of this function is the demanding of money by the childrens from the dora/koina( bride/bridegroom) for applying turmeric & moong daal paste on their face, neck, hands and feet. Earlier singing of biyar naam(marriage songs) were a part of it, but now it has been gradually disappearing.

(3) Tamuli, the funniest character of the event. He is the most unique character of any assamese Muslim marriage. A good friend is being chosen by the groom to accompany and help him in everything on that big day till the nikaah. After the nikaah his
duty ceases automatically and looses all his importance when the bride takes over his place and gets the first official control over her newlywed husband.

(4)For the nikaah, a gorgeous pair of mekhela chadar (a traditional assamese saree in two piece) is draped around the bride's body in a very beautiful style along with all kinds of traditional and modern jewelleries. For the groom the dress code is Sherwani and Paaguri (turban) for Nikaah making him feel like the most luxurious royal for the day. Next day a wedding reception is hosted by the groom's family where generally formal suits are seen wearing since centuries.

(5) Dora Adora, that is the welcoming of the bridegroom and Tamuli. It's the most awaited event for the kids of the bride's family.

Many a times, the bridegroom is asked to cut a ribbon at the entrance before entering the marriage hall. After this they are accompanied to the hall and made to seat in the most beautiful chair painstakingly decorated exclusively for them, where a bunch of kids surrounds to garland them, sprinkle rose water and to put aatar (Islamic fragrance) on his and tamuli's dress, followed by feeding them with milk and sweets. In return, the Dora and Tamuli both give gifts to the kids for welcoming them.

(6) Exchange of traditional trays(bota) containing Tamul and Paan (i.e, Areca nut and Betel leaf) happens only in Assam. This event takes place immediately after the preceding event of dora-aadora. Such is the importance of Tamul-Paan in our society.

(7) The Qubul hain time for other Indian muslim is "Moi Kobul korisu" for Assamese Muslims. Here, in front of everyone, the guardians of both the families ask the couple to announce it officially if they have accepted the new relation and in reply they quote the famous sentence "moi kobul korisu" meaning 'I accept'.

(8) Nikahor laddoo, Jo khaaye wo bhi pastaye aur jo naa khaye wo bhi pastaye. A motichur ki laddo is generally distributed immediately after the nikaak to celebrate and commemorate the union of the two newlyweds, followed by an extremely delicious lunch or dinner depending upon the time. The most favorite menu for any assamese Muslim wedding includes Kurma/bhuna pulau, parantha, chicken roast, kofta, kabab, fish fry and the likes. Kurma pulau and chicken roast are the innovation and gift of Assamese Muslim to the world. These two dishes are a blend of Iranian and Assamese flavor. Although these dishes are popular among the Assamese muslims, its not restricted to them, and is made by many today.

(9) After the nikaah the inlaws changes the bride's earlier dress with the new pair of mekhela chaadar, new jewelleries and new shoes gifted by them before she is accompanied to her new home.

(10) Dorai cake kata. Cutting the very beautifully decorated icing cake by the groom is the last most unique and happening event at the the bride's home. Here specially the girls hide the knife and ask the groom to search for it with a condition of paying a huge penalty if he fails in finding it, which he is bound to fail. After all how can you win over girls.

(11) After reaching her new home, she receives a warm welcome by washing her feet in a bowl of perfumeted water by the groom's family(mostly girls and children). In return she shower the entrance floor with coins of different denominations. All the kids jump over each other competing to collect the most of them. This is how she starts her new journey of life.