Rainfall and other forms of Precipitation

This handbook by Central Water Commission aims to provide necessary guidance to the field engineers in the state and central for design, appraisal, construction and monitoring of the flood management works covering all the relevant BIS codes, design manuals, guidelines, technical specifications for construction materials and practices etc. to meet new challenges in the flood management in India.

Floods/heavy rains can cause a severe and irreversible damage to human lives, property both public and private, and livestock. Since floods are one of the frequent natural calamities faced by India, the loss incurred by it is huge.

This report presents information about the status of landslides in Sikkim. It was commissioned by the Department of Science and Technology and authored by the Wadia Institute of Geology. It draws upon several archives including that of the Directorate of Geology and Mining, Government of Sikkim. The report also presents recommendations for preparing an action plan for undertaking landslide studies.

What happens when two or more states are dependent on same water resource for agricultural purposes ? Do the states compete for the resource or are their needs sufficiently different from each other? What are the consequences of the competition for this precious resource?

This article sheds light on the dispute between Karnataka and Tamil Nadu, for sharing Cauvery river water. The ongoing tussle between the two states has seen a lot of unrest amongst farmers in  form of dharnas, protests, rail roko and non-cooperation by citizens, and disagreement with the agreements made by their respective governments and unending negotiations by governments involved, to come to a mutually agreeable decision.

The data is categorised into watershed wise (basin-wise) annual availability of groundwater, current draft (utilisation), allocation for domestic and industrial needs, availability for future use (or the balance) and categorisation based on stage of development and rigorous statistical treatment of water levels.

Prolonged and recurrent drought, being experienced in India and various parts of south Asia, is the manifestation of climate change, partly caused by human interventions. Drought has been one of the primary reasons for widespread poverty and environmental degradation including deteriorating water quality and water security. The world has been more drought-prone during the past 25 years and the vulnerability of tropical countries to drought is likely to increase (Inter-governmental Panel on Climate Change, 2007).

Many of these systems (1) continue to function and are often more sustainable, cost-effective and successfully managed by local institutions. Phads are one such community-based and managed diversion irrigation management system (2) prevailing in the north-western part of Maharashtra and date back to the early 16^th century as per historical accounts. The system is prevalent in the Tapi basin on rivers the Panjhra, Mosam and Aram in Dhule and Nashik districts (3).

Phads or diversion-based irrigation systems, are being revived and promoted in Vidarbha region of Maharashtra by Dilasa, a Yavatmal-based voluntary development organisation (Video courtesy: Dilasa)

Increasing rice yields and saving water: Lessons for policy and practice - The System of Rice Intensification (SRI)

Low external input and sustainable agriculture (LEISA) India has come up with a collection of  alternative ways of combating desertification in the fragile region of the country in its recent issue. The articles are success stories of such intiatives by farmers and NGOs.