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Accueil du site → Doctorat → Pays-Bas → < 2000 → On the waterfront : water distribution, technology and agrarian change in a South Indian canal irrigation system

Wageningen Universiteit Pays Bas (1998)

On the waterfront : water distribution, technology and agrarian change in a South Indian canal irrigation system

Mollinga, P.P.

Titre : On the waterfront : water distribution, technology and agrarian change in a South Indian canal irrigation system

Auteur : Mollinga, P.P.

Université de soutenance : Wageningen Universiteit

Grade : PhD thesis 1998

Résumé partiel
This book discusses water distribution in the Tungabhadra Left Bank Canal irrigation system in Raichur district, Karnataka, India. The system is located in interior South India, where rainfall is limited (approximately 600 mm annually) and extremely variable. The region suffered from failed harvests and famines in the past. A large scale irrigation system was constructed to solve these problems. The system is operational since 1953 and was completed in 1968. The area to be irrigated is 240,000 ha.

The Tungabhadra Left Bank Canal is a protective irrigation system. It has been designed to spread available water thinly over a large area. It involves supplementary or partial irrigation. Crop water requirements are not fully met. In a particular agricultural season only part of the area is irrigated. Not production per unit area is maximised, but production per unit water.

The last point implies a fundamental contradiction inherent to protective irrigation. For a farmer with a given landholding maximisation of production per unit land is the obvious strategy, instead of contributing to the maximum total product given the volume of water. The most remunerative crops, rice and sugarcane, demand a lot of water. Farmers who have the opportunity therefore appropriate more water than their protective share. As a result others do not get their share. Irrigation water in the Tungabhadra Left Bank Canal, like in many other systems, is unequally distributed.

Mots clés : irrigation water / water distribution / farmers / canals / water supply / water allocation / management / india

Présentation et version intégrale

Page publiée le 10 juin 2008, mise à jour le 1er juin 2022