Gharats are water-powered grinding mills found in Himalayan villages. Though these are owned and managed by individuals, they are considered to be the common property of the entire village. Traditionally, the villagers contributed labour to the gharat owner at the time of its installation or during repairs in return for which their grains were ground for free for social and religious ceremonies.
Each gharat is generally set up along the bank of a perennial stream close to the village. The water of the stream is diverted through a channel up to the site of the mill-house, which is generally constructed at a point where a waterfall of 2 to 6 meters is achieved from the channel. A long wooden chute consisting of an open channel made either of wooden planks or carved from a large tree trunk is narrowed down towards the lower end forming a nozzle. The force of the water let through the chute strikes the blades of the turbine in the mill-house and rotates the wheel, which in turn rotates the wooden shaft. The average power output of a gharat ranges from 1.0 KW to 1.5 KW and the grinding capacity ranges from 4-8 kg flour per hour depending on water availability and types of grains.
Himmotthan Society, an organisation working on water and livelihood issues in Uttarakhand, and Himalaya Trust, an organisation working on livelihoods in Uttarkashi, initiated a pilot project focusing on two gharat units at Ganeshpur and Bon villages in Uttarkashi district. The pilot was designed to improve the efficiency of these units, develop better models and explore ways of improving their viability.
All gharat owners of Ganeshpur and Bon village belong to the category of marginal farmers, with average land holdings of 1 to 2 acres. The income of traditional gharat owners varies from Rs. 2,000 to Rs. 2,800 per month. Each gharat is in operation for only 15-18 days a month and grinds about 1900 kg of wheat during that period. Declining agriculture output in the area is the reason for the lull in grinding through the rest of the month. Considering the annual aggregate income from milling, agriculture and livestock farming, the per capita income of a gharat owner’s family varies from Rs. 66-93 per day.
Currently, only 25% of families in Ganeshpur and Bon use gharats. Most of them either buy wheat flour directly from the market or use diesel mills located near the market for grinding. A number of factors are responsible for the decrease in the quantity and efficiency of gharats. These include:
The wooden parts of the traditional gharats were replaced with metal ones (including ball bearings). This increased its efficiency by 40% to 50%. Similarly, those gharats where adequate flow of water and head - the height from which water approaches the turbines - were available to produce at least 5.0 KW of power at the shaft were modified to generate electricity. The generated electricity was used for lighting and to run other machines directly for grinding, threshing, oil extraction, etc.
The operation and maintenance procedures of the improved gharats are simple and can be carried out with locally available resources and expertise. Vinayak Water Based Enterprise Development Federation in Ganeshpur is responsible for all operation and maintenance (O&M) as well as collecting monthly changes from the families for O&M. It also ensures that all assets are insured.
This article is an abridged version of a paper that was submitted by the authors for the Sustainable Mountain Summit (Kohima September 25 - 27, 2013). The full paper is attached below.