March 7, 2015

What are the various State wise rooftop rainwater harvesting legislation in various Indian states?

By Jay Dee Infra In Real Estate News No comments

What are the various State wise rooftop rainwater harvesting legislation in various Indian states?

Monsoon in India is one of the oldest weather observations which happen from June to September every year. It is a major weather phenomenon because of its influence on the lives of people and their well-being.

Average rainfall across various Indian states is as follows:

Sl. No. State Meteorological Divisions Average annual rainfall (mm) Average annual rainfall (ft)
1 Andaman and Nicobar Islands Andaman and Nicobar Islands 2967 9.73
2 Arunachal Pradesh Arunachal Pradesh 2782 9.13
3 Assam Assam and Meghalaya 2818 9.25
4 Meghalaya Assam and Meghalaya 2818 9.25
5 Nagaland Nagaland, Manipur, Mizoram and Tripura 1881 6.17
6 Manipur Nagaland, Manipur, Mizoram and Tripura 1881 6.17
7 Mizoram Nagaland, Manipur, Mizoram and Tripura 1881 6.17
8 Tripura Nagaland, Manipur, Mizoram and Tripura 1881 6.17
9 West Bengal Sub-Himalayan West Bengal and Sikkim 2739 8.99
10 West Bengal Gangetic West Bengal 1439 4.72
11 Sikkim Sub-Himalayan West Bengal and Sikkim 2739 8.99
12 Orissa Orissa 1489 4.89
13 Bihar Bihar Plateau 1326 4.35
14 Bihar Bihar Plains 1186 3.89
15 Uttar Pradesh Uttar Pradesh 1025 3.36
16 Uttar Pradesh Plain of West Uttar Pradesh 896 2.94
17 Uttar Pradesh Hills of West Uttar Pradesh 1667 5.47
18 Haryana Haryana, Chandigarh and Delhi 617 2.02
19 Delhi Haryana, Chandigarh and Delhi 617 2.02
20 Chandigarh Haryana, Chandigarh and Delhi 617 2.02
21 Punjab Punjab 649 2.13
22 Himachal Pradesh Himachal Pradesh 1251 4.10
23 Jammu and Kashmir Jammu and Kashmir 1011 3.32
24 Rajasthan West Rajasthan 313 1.03
25 Rajasthan East Rajasthan 675 2.21
26 Madhya Pradesh Madhya Pradesh 1017 3.34
27 Madhya Pradesh East Madhya Pradesh 1338 4.39
28 Gujarat Gujarat region 1107 3.63
29 Gujarat Saurashtra and Kachchh 578 1.90
30 Goa Konkan and Goa 3005 9.86
31 Maharashtra Konkan and Goa 3005 9.86
32 Maharashtra Madhya Maharashtra 901 2.96
33 Maharashtra Marathwada 882 2.89
34 Maharashtra Vidarbha 1034 3.39
35 Andhra Pradesh Coastal Andhra Pradesh 1094 3.59
36 Andhra Pradesh Telengana 961 3.15
37 Andhra Pradesh Rayalaseema 680 2.23
38 Tamil Nadu Tamil Nadu and Pondicherry 998 3.27
39 Pondicherry Tamil Nadu and Pondicherry 998 3.27
40 Karnataka Coastal Karnataka 3456 11.34
41 Karnataka North Interior Karnataka 731 2.40
42 Karnataka South Interior Karnataka 1126 3.69
43 Kerala Kerala 3055 10.02
44 Lakshadweep Lakshadweep 1515 4.97

As we all know, rain is the primary source of water while rivers, lakes and ground water are the secondary sources. Our daily consumption of water is fulfilled by secondary sources of water. However, these secondary sources of water are replenished by primary source of water (rainfall). Therefore, it becomes imperative for all of us to harvest this rain water in order to refill rivers, lakes, ground water.

Advantages of Water harvesting

  1. Provides drinking and irrigation water.
  2. Increases groundwater recharge.
  3. Reduces storm water discharge, urban floods and overloading of sewage treatment plants.
  4. Reduces seawater ingress in coastal areas.

An example,

Let’s take the case of Delhi; the average annual rainfall is 617 mm or 2.02 Ft. In a given area of 1 Ft by 1 Ft, the rain water that can be harvested every year will be 2.02 Cubic Feet or 57.21 liters. In other words, every household can harvest 57.21 liters of water in an area of 1 ft by 1 ft. If you have a roof of 50 ft by 20 ft, the water harvested would be 57206.4 liters.

rain water harvesting process in ranchi

Now, is this water harvested properly? Households, residential complexes, commercial complexes can harvest rain water by capturing runoffs from rooftops. The water thus captured can either be stored in a community water tank or allowed to go to the ground via a pipe which helps in refilling or increasing the ground water levels of a given region, thus, reducing the scarcity of water.

Source: – See more at: http://nirrtigo.blogspot.in/2015/02/rainwater-harvesting-in-india.html?

What are the various State wise rooftop rainwater harvesting legislation in various Indian states?

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