Rainfall and other forms of Precipitation

Featured Articles
September 13, 2022
Chaos in a concrete jungle
Heavy rains and floods have battered Bengaluru yet again. Uncontrolled and unregulated development and concretisation of the city that pays no heed to the ecology and hydrology of the region needs to stop!
Urban flooding in Bangalore (Image Source: Thejas via Wikimedia Commons)
March 29, 2022
India, in the hot seat!
The intensity and duration of heat waves is predicted to increase in India and human induced anthropogenic changes are to blame.
A man sits under the scorching heat of the sun in front of Amer fort in Jaipur (Picture courtesy: Prabhu B Doss, Flickr Commons: CC-By-NC-ND-2.0)
February 10, 2022
87% of India's districts vulnerable to droughts: IMD
47% of India’s population is vulnerable to floods, says IMD's Climate Hazards Atlas
(Image: J Surya, CC-SA-4.0 International)
July 4, 2021
Did the moody monsoon shrink forests in peninsular India?
A study finds that while forests existed in peninsular India, they were replaced by savanna grasslands over time. And the weakening monsoon was the culprit!
Savanna grasslands at Nannaj Bustard Sanctuary, Solapur, Maharashtra (Image Source: Raju Kasambe via Wikimedia Commons)
June 30, 2021
Climate change likely to affect agricultural productivity in Maharashtra
Climate analysis predicts mismatch in rainfall and temperature patterns with crop phenology: Soybean, Cotton, Wheat and Gram crops at risk, finds Institute for Sustainable Communities study across three major regions of Maharashtra.
Maharashtra faces an increasing risk from climate change which is likely to impact the production of four major crops - Soybean, Cotton, Wheat and Gram. (Image: BAIF Flickr, CC BY-NC-SA 2.0)
December 13, 2019
Trading in virtual water
A study highlights the need to scale down the export of rice, maize, buffalo meat and other items to conserve groundwater in India.
A farmer uses a hosepipe to irrigate crops at her farm in Nilgiris mountains, Tamil Nadu (Image: Hamish John Appleby for IWMI, Flickr Commons, CC BY-NC-ND 2.0)
Technologies for lake restoration: A paper from Helmut Klapper on water quality and restoration of lakes
A paper on economical and ecologically safe technologies that will greatly enable restoration of lakes
Helmut Klapper
Posted on 20 Aug, 2009 03:46 PM

Download this guide to technologies which can assist you in your goal to restore lakes.

Read more on the Journal of Limnology
Revival of ancient water tanks in India: Case studies from Karnataka and Tamilnadu
This page will help you learn more about how the revival of ancient water tanks is once again benefiting the community today
World Bank and DHAN Foundation
Posted on 20 Aug, 2009 03:26 PM

Centuries old dried up water tanks have been revived with the combined efforts of the local community and the authorities.
Map: Location of water resource projects across river basins in India
This map from the National Institute of Hydrology shows the location of the various water resources projects in each river basin in the country.
National Institute of Hydrology
Posted on 20 Aug, 2009 03:23 PM

The map indicates that across the main 19 river basins of the country, water resource projects with a total live storage of 174 BCM (Billion Cubic Metres) have been completed, 75 BCM are ongoing, and 132 BCM are being planned.
Annual average availability of water for agriculture in India as of 1991
This map shows the river basin-wise annual average availability of water (in m3) for agricultural cultivation, as of 1991
Hydrology and Water Resources and Information System
Posted on 20 Aug, 2009 02:50 PM

/sites/default/files/iwp/Basin-wise%20annual%20average%20availability%20of%20water%20for%20agriculture_1991_NIH.jpg
Rashtrita Jal Chetna Yatra: Efforts of Tarun Bharat Sangh and Rajendar Singh in addressing water related concerns across the country
A detailed write up about the aims, aspirations and achievements of the Rashtriya Jal Chetna Yatra
Rashtriya Jal Chetna Yatra
Posted on 20 Aug, 2009 02:20 PM

Tarun Bharat Sangh and Rajendar Singh started a massive campaign to spread awareness of traditional water harvesting structures in order to restore the water resources of arid Rajasthan. The aim was to popularize the use of such traditional structures across the country.
Collection of articles on climate change with special reference to India
The following documents address various issues related to climate change, particularly highlighting the Indian context
India Water Portal
Posted on 20 Aug, 2009 12:36 PM

Climage Change, Indias perceptions, positions, policies and possibilities, written by Jyoti K Parikh and Kirit Parikh, Indira Gandhi
Chennai metropolitan area's water woes: CMWSSB's plans for the future
Steps outlined by the Chennai Metropolitan Water Supply and Sewerage Board to meet the water demands of Chennai city
Chennai Metropolitan Water Supply and Sewerage Board
Posted on 19 Aug, 2009 04:01 PM

CMWSSB or Metro Water was established in 1978 and serves 180 sq kms of area and 5.5 million population.
Physiographic rainfall variations across India: Thematic map from the Indian Institute of Tropical Meteorology
This map shows the recent rainfall trends, based on data from 1813 to 2006, and also shows monthly trends for the 4 main rainfall months of the year - June to September.
Indian Institute of Tropical Meteorology (IITM)
Posted on 19 Aug, 2009 03:59 PM

The map shows that there is a decreasing trend of rainfall over most of peninsular India (barring Maharashtra) including the western part of the Gangetic plain and the north eastern states apart from Assam.

An increasing trend of rainfall has been observed for the eastern part of the Gangetic plain, Assam, Telengana and all coastal regions of the country.
Map depicting areas prone to flooding in India
A map from Wikimedia Commons showing the areas frequently affected by floods in India
Wikimedia Commons
Posted on 19 Aug, 2009 03:48 PM

This map shows the regions in the country that are regularly affected by floods.

The major flood prone regions are Punjab, Haryana, most of the Gangetic plains including Uttar Pradesh, North Bihar and West Bengal, the Brahmaputra valley, coastal Andhra Pradesh and Orissa, and South Gujarat.
Rainwater harvesting basics: Filtering the water before storage and use
Filtering rainwater before storage is essentially to remove organic material and silt so that the water stays clean longer.
rajshekar
Posted on 19 Aug, 2009 03:29 PM

Overview

Rainwater is amongst the purest water one can get distilled as it is by the sun. However, in a rainwater harvesting system, the water comes in contact with several surfaces, such as the roof or gutters. Its flow becomes possibly mixed with leaves or dust.
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