Mahanadi

Man-made floods in Orissa in September 2011- Key issues raised by Water Initiatives Orissa
The Orissa floods of 2011 point to the loopholes in river basin planning and management and calls for urgent attention of planners and policy makers. Posted on 06 Oct, 2011 10:24 AM

Orissa was hit by two spates of flood in September 2011, the first one being caused by heavy rains in the Mahanadi catchment and release of huge discharges from Hirakud dam. The second one was caused by heavy rains and flooding of Brahmani, Baitarani and Budhabalanga rivers. These floods point to the loopholes in river basin planning and management and calls for urgent attention of planners and policy makers. 

Different designs, same management: A note from Water Initiatives Odisha on Rengali dam and flood management
‘Did we manage the Rengali dam the way we managed Hirakud?’ asks Water Initiatives Odisha Posted on 28 Sep, 2011 09:57 AM

Water Initiatives Odisha, brings out a special note on this issue in response to the latest spell of the flood disaster in northern Odisha Rivers.

A study of saline freshwater interface phenomena in the Mahanadi delta region (Orissa)
Orissa's freshwater aquifer systems prone to saline water mixing and migration with time and development Posted on 10 Jul, 2010 10:40 PM

A study of saline freshwater interface phenomena in the Mahanadi delta region (Orissa)The subsurface aquifer systems in Mahanadi delta region in Orissa (India) is largely characterized by two groups of freshwater aquifer systems, both of which are prone to saline water mixing/migration with time and development:

  • The south western Mahanadi delta region is represented by unconfined to semi-confined freshwater aquifers underlained by brackish/saline aquifer systems with a diffusion boundary.
  • The north eastern parts of Mahanadi delta is represented by deep freshwater confined aquifers overlained by brackish/saline water aquifers with aquitard/ aquiclude boundary.
A study of saline freshwater interface phenomenon in the Mahanadi delta region, Orissa
The subsurface aquifer systems in Mahanadi delta region in Orissa (India) is largely characterized by two groups of freshwater aquifer systems: 1. The south western Mahanadi delta region is represented by unconfined to semi-confined freshwater aquifers underlained by brackish/ saline aquifer systems with a diffusion boundary 2. The north eastern parts of Mahanadi delta is represented by deep freshwater confined aquifers overlained by brackish/saline water aquifers with aquitard/ aquiclude boundary. Both the systems are prone to saline water mixing/ migration with time and development. The present paper incorporates results of a simulation study using a finite element based FEFLOW model and examines saline water migration scenarios when subjected to increasing rates of pumping under steady state conditions with the help of a calibrated groundwater model. The results indicate the unconfined and semi-confined aquifer systems in the south western part of Mahanadi delta are prone for faster rates of saline water mixing of the contamination when compared to the deep confined systems in the north eastern parts of Mahanadi delta. Posted on 02 Jul, 2010 04:47 PM

ABSTRACT

Impact of climate change on the Mahanadi river basin
The Mahanadi river basin is one of the most vulnerable to climate change and variations in temperatures and precipitation regions. Posted on 28 Aug, 2009 02:56 PM

The Mahanadi River delta plain covers 0.9 x 10 km and lies between 85 40' : 86 45' E and 19 40' : 20 35' N. The catchment area of the river covers 1.42 x 10 km. The sediment yield of the Mahanadi catchment is around 200-400 tonnes/km. It has an average annual rainfall of 1572 mm and 70% of this during the SW monsoon season.

References of the impact of climate change on river deltas and other coastal areas
A short compilation of articles and reports on the impact of climate change on river deltas and other coastal areas Posted on 26 Aug, 2009 04:48 PM

Mumbai Marooned: An Enquiry into Mumbai Floods 2005 - Final Report ,
By Conservation Action Trust - Click here

Enquiry-mumbai-floods-2005-final-report

Impact of climate change on river deltas and other coastal areas in India
While global warming is a matter of worldwide concern, among the most vulnerable areas are the coastlines of less developed tropical countries such as India. The river deltas, in particular, are already facing the brunt of climate change and these adverse impacts can be expected to increase dramatically in the course of this century. Posted on 26 Aug, 2009 04:23 PM

The effects are most visible in the Sunderbans. Literally the 'beautiful forest', these wetlands at the mouths of the Ganga and Brahmaputra river systems are among the largest mangrove forests in the world. About 62% of this area of some10000sq km lies in Bangladesh but there is a significant Indian portion in the state of West Bengal.

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. 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.

River basins and river basin organisations in South Asia
The research study will help in providing the basis for planning for future strategic interventions in the river basins mentioned in the study, and to encourage similar exercises in other regions Posted on 22 Jul, 2009 03:12 PM

As part of the research study, River Basins and River Basin Organisations in South Asia, done by the Society for Participatory Development Hyderabad, CapNet South Asia (Read More) and Gomukh Environmental Trust for Sustainable Development Pune (Click Here), data about individual river basins has been collected for the river basins in South Asia.

Basin maps of Mahanadi river showing basin indicators, landcover classes and biodiversity information and indicators
World Resources Institute presents basin maps of Mahanadi river showing basin indicators, landcover classes and biodiversity information and indicators Posted on 17 Apr, 2009 02:07 PM

Basic Indicators of Mahanadi Basin

Basin indicators map of Mahanadi river basin

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