Rainfall and other forms of Precipitation

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Featured Articles
May 8, 2024 What is the ecosystem based approach to water management? How can it help in solving the water woes of states in the Deccan Plateau?
An ecosystem based approach to water management (Image Source: India Water Portal)
January 25, 2024 This report by CEEW discusses the findings of a study on India’s first sub-district -level monsoon variability assessment to decode changing rainfall patterns across India during the southwest and northeast monsoon.
The moody monsoon (Image Source: Mayank Makhija via IWP Flickr photos)
August 16, 2023 India Water Portal is hosting a photo competition on World Photography Day. Hurry, send us your photos before 31st August!
May 8, 2023 Warming will not only lead to a decline, but also trigger monsoon extremes in the Indo Gangetic Plains.
A woman wades through knee-deep water with her belongings. (Picture courtesy - 101Reporters) (Source: IWP Flickr photos)
May 4, 2023 Climate change is expected to have significant impacts on the Indian monsoon
As per the India Meteorological Department (IMD), instances of heavy rainfall have increased by almost 85% in the country since 2012 (Image: Marina, 2009,Wikimedia Commons)
April 4, 2023 Forests greatly help in maintaining the water balance of nature by storing water during monsoons and making this water available during dry seasons. India urgently needs to save its forests to prevent droughts and the adverse effects of climate induced global warming.
Forests and soil moisture can act as buffers to store water during dry spells (Image Source: India Water Portal)
Rainwater harvesting basics: All you need to know about recharge pits
A recharge pit allows the rainwater to replenish groundwater by recharging the underground aquifers. It can be built to recharge a borewell or just to help the water infiltration in an area. Posted on 18 Aug, 2009 04:09 PM

1) Overview:

How to construct a rainwater tank: A comprehensive design and performance guide
The guide gives a detailed overview about the design aspects, different types of systems, costing, performance, water quality and regulatory issues of rainwater tanks Posted on 18 Aug, 2009 04:06 PM

Water Sensitive Urban Design in the Sydney Region has come out with a comprehensive brochure which details out the system overview, design, costing and water quality issues in the construction of rainwater tanks

Click here to download the guide

Map: Annual average rainfall of India
The annual rainfall map of India indicating the volume of rain different regions in the country receive Posted on 18 Aug, 2009 03:57 PM

Over a range of under 20cm to over 800cm, these two maps, give an idea of the average rainfall received by different regions in the country.

The lowest rainfall receiving areas are Rajasthan, Gujarat, Western Uttar Pradesh, parts of Haryana and Punjab, and the central peninsular region of Karnataka, Maharashtra and Andhra Pradesh.

River basin and sub-basin map of India from the Central Ground Water Board
The Central Groundwater Board have come out with watershed and basin-wise maps for the entire country. Here's an introduction and the link to the resource Posted on 18 Aug, 2009 01:04 PM

Watersheds are natural hydrological entities that cover a specific aerial expanse of land surface from which the rainfall runoff flows to a defined drain, channel, stream or river at any particular point. The terms region, basin, catchment, watershed etc are widely used to denote hydrological units.

All you need to know about rain barrels: Stepwise preparation and construction guide
Using a rain barrel is the easiest way to begin rainwater harvesting. Rain barrel serves as a storage unit for rooftop rainwater. It can collect a substantial amount of rainwater. Posted on 18 Aug, 2009 12:51 PM

Overview

In Bangalore, for example, for an annual rainfall of 900mm over 60 rainy days and a roof area of 50 sq.m.

River systems of Karnataka: Overview of the state's river systems and irrigation patterns
The page has information on the tributaries, catchment area and drainage patterns of the many rivers in the state
Posted on 14 Aug, 2009 03:19 PM

The Water Resources Department of Karnataka has a lot of relevant information on the river systems in Karnataka, irrigation, water resource development projects in Karnataka, notifications and orders, performance budgeting and allocation.

BCIL surveys the citizens of Bangalore to learn about their water conservation practices
Water survey of the citizens of Bangalore conducted by Biodiversity Conservation India Ltd. Posted on 14 Aug, 2009 12:25 PM

Here's a list of resources relating to the water survey conducted in the city of Bangalore

District-wise report of habitations covered in Himachal Pradesh for water supply and irrigation
A complete list of district wise data on irrigation, water supply, hand pumps distribution and progress of Command Area Development programme in the state of Himachal Pradesh Posted on 14 Aug, 2009 12:19 PM

District-wise report of habitations covered for water supply, hand pumps, irrigation, flood control and command area development

Read more

Bacteriological quality of water samples of a tertiary care medical center campus in North Western Himalayan region
Studies conducted in the North Western Himalayan region have found that surface and groundwater samples are highly contaminated with faecal matter in the region Posted on 14 Aug, 2009 11:53 AM

A study published in the The Internet Journal of Third World Medicine of bacteriological quality of water samples of a tertiary care medical center campus in North Western Himalayan region, more specifically in Kangra district of Himachal Prad

Baseline report: Sachetana Drinking Water project of the Government of Karnataka (2006-2011)
The project envisions a set of interventions including household rainwater harvesting for clusters of villages in Karnataka that are particularly severely affected by fluoride Posted on 14 Aug, 2009 11:28 AM

The Sachetana Drinking Water project of the Government of Karnataka covers 15 villages in each of the taluks of Bagepalli (Chikkaballapur), Mundargi (Gadag), Sira (Tumkur) and Pavagada (Tumkur).

The baseline survey covers a representative portion of the villages and families of the above and contains the following information:

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