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International Water Management Institute (IWMI)

The impacts of water infrastructure and climate change on the hydrology of the Upper Ganges river basin – A research report by IWMI

GangaThis study by International Water Management Institute (IWMI) assessed the variability of flows under present and ‘naturalized’ basin conditions in the Upper Ganges Basin. The Ganges river system originates in the Central Himalayas, and extends into the alluvial Gangetic Plains and drains into the Indian Ocean at the Bay of Bengal. In the upstream mountainous regions, hydropower is the main focus of development with mega and micro projects either under construction or being planned in both Nepal and India.

After the main river channel reaches the plains, it is highly regulated with dams, barrages and associated irrigation canals. All this infrastructure development and abstractions affects the river’s flow regime and reduces flows, which, in turn, impacts downstream water availability, water quality and riverine ecosystems. Furthermore, there are concerns that climate change is likely to exacerbate the water scarcity problem in the Ganges Basin. Therefore, modeling the hydrology of the basin is critical for estimation, planning and management of current and future water resources.Read More

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Comparative management performance of government and farmer managed irrigation systems in Kashmir

Kashmir was originally home to an elaborate network of farmer owned and managed canal based irrigation systems. Gradually, with the increase in planned development, several irrigation canals were taken under the control of the irrigation department. This paper compares the management of irrigation systems by farmers and government. 

Image of community desilting a canal

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Comparative management performance of government and farmer managed irrigation systems in Kashmir712.05 KB

Location

baramulla, JK, India
Latitude: 34.211475, Longitude: 74.343896

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Mapping drought patterns and impacts: A global perspective – A research report by IWMI

This study by the International Water Management Institute (IWMI) examines the global patterns and impacts of droughts through the mapping of several drought-related characteristics – either at a country level or at regular grid scales. Characteristics cover various aspects of droughts – from global distribution of meteorological and hydrological drought risks to social vulnerability and indices related to water infrastructure.

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Mapping drought patterns and impacts: A global perspective – A research report by IWMI (2009)1.4 MB
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Adaptive water resource management in the Lower Bhavani project command area in Tamil Nadu – A research report by IWMI

BhavaniThis study by International Water Management Institute (IWMI) explores the theory and practice of adaptive management based on a detailed field study in the Lower Bhavani project command area.

To what extent farmers and water resource managers already practice adaptive management and whether it is practiced in an optimal manner or could there be areas for improvement based on recent advancements in the theory of adaptive management are some of the questions that are particularly appropriate in the light of rapid changes in river basin water use and also in relation to basin closure.

This paper draws on the development and use of water resources in the Lower Bhavani Project (LBP), with the LBP reservoir and the 84,000 hectare (ha) LBP command area. The project diverts water from the Bhavani River, a tributary of the Cauvery River in Tamil Nadu.

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Adaptive water resource management in the Lower Bhavani project command area in Tamil Nadu – A research report by IWMI (2009)667.65 KB
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Hydrology of the Upper Ganga river – A report by the International Water Management Institute

This report by International Water Management Institute deals with the hydrology of the Upper Ganga river - the upper main branch of the river. To provide the background hydrological information for the assessment of environmental flow requirements at four selected ‘Environmental Flow’ sites, a hydrological model was set up to simulate the catchment in the present state (with water regulation  infrastructure) and to generate the natural flows (without water regulation infrastructure).

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Hydrology of the Upper Ganga river – A report by the International Water Management Institute (2011)1.73 MB

Location

Kanpur, UP, India
Latitude: 26.457904, Longitude: 80.320663

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Rainfed agriculture: Unlocking the potential – A book by CAB International

This book, Rainfed Agriculture: Unlocking the Potential, opens up vistas of new, untapped opportunities to meet the challenges of enhancing food production with limited water resources. This is the seventh book by CAB International in the series on Comprehensive Assessment of Water Management.

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Location

Bundi, RJ, India
Latitude: 25.438150, Longitude: 75.637306

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An assessment of crop water productivity in the Indus and Ganges river basins: Current status and scope for improvement – A research report by IWMI

IWMI ReportThis paper by the International Water Management Institute (IWMI) presents a new approach for analysis of water productivity (WP) of rice and wheat in the Indus and the Ganges river basins, South Asia, based on the integration of readily available remote sensing, national crop productivity and land use statistics and weather data. Understanding crop water productivity over large river basins has significant implications for sustainable basin development planning.  

Three major steps are involved in producing crop water productivity maps: (1) crop dominance map, (2) yield estimates, and (3) water consumption (evapotranspiration (ET)) estimates. The crop dominance map is synthesized from the relevant, and publically available, land use/land cover (LULC) maps with ground truth data. National statistics on crop area and yields are collected, and the yields are interpolated to grid level (500 meters (m) x 500 m) using Moderate Resolution Imaging Spectroradiometer (MODIS) Normalized Difference Vegetation Index (NDVI) maps.

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The effects of agricultural water and landholdings to rural livelihoods in Indo-Gangetic basin – Research analysis by IWMI and ICAR with an emphasis on Bihar

IWMI PaperThe current research analysis by International Water Management Institute (IWMI) in cooperation with ICAR Research Complex for Eastern Region is focused on the identification of agricultural water use and land scaling effects to rural livelihoods in the Indo-Gangetic basin (IGB) with an emphasis on Bihar. In particular, water use and landholding factors are widely acknowledged as major determinants of agricultural development and hence rural wealth in IGB basin and Bihar. High attention is mainly given to irrigation policy while land is often apprehended through soil productivity aspects.

However, little importance is given to land scaling and water consumption effects in respect to agricultural development and rural livelihoods. Further, the valuation of agricultural water is another issue that has not been sufficiently elaborated. Another major aspect which is still poorly investigated pertains to farmers' perceptions towards the significance of institutional and environmental related parameters of agricultural water. Last but not least, little attention has been given to crucial socio-demographic indicators which could act as potential drivers to farmers' perceptions towards environmental related parameters of agricultural water.

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Location

Darbhanga, BR, India
Latitude: 26.170000, Longitude: 85.900000

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Water poverty in the northeastern hill region of India: Potential alleviation through multiple-use water systems - A report by IWMI

This study by IWMI maps the household water poverty in a typical remote village of the northeast, understands the causes for such a scenario and reflects on the past efforts. Local water resource-based multiple-use water systems that provide water supply both for household and livestock needs and for small high-value agriculture are understood. 

The per capita and per hectare availability of water in India is highest in this region but the societal (both productive and consumptive) water use is less than five per cent of the existing potential. The unutilised and excessive water supplies during the rainy season create a mayhem of devastations almost every year with ravaging floods, landslides, soil erosion and other infrastructural failures and miseries and unrest in large parts.Read More

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Water poverty in north east region by IWMI (2010)3.02 MB

Location

Mon, NL, India
Latitude: 26.722668, Longitude: 95.032764

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Groundwater externalities of surface irrigation transfers under national river linking project: Polavaram – Vijayawada link

Polavaram projectThis document published by IWMI and CGIAR describes the details of the Polavaram project, which has been planned by the state of Andhra Pradesh as a multi-purpose project:Read More

  • to provide irrigation benefits to the upland areas
  • to provide a water supply to the industries in Visakhapatnam city, including the Steel Plant, for the generation of hydropower
  • for the development of navigation and recreation facilities.

The project envisages the construction of an earth-cum-rock filled dam that is 1,600 m long across the Godavari River at Polavaram, and about 42 km upstream of the Godavari Barrage at Dowlaiswaram.

Location

Polavaram, AP, India
Latitude: 16.983113, Longitude: 80.914672

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6.22-2011.07.01-06