Watershed is defined as a geohydrological unit draining to a common point by a system of drains. All lands on earth are part of one watershed or other. Watershed is thus the land and water area, which contributes runoff to a common point. Water is essential for all life and is used in many different ways - for food production, drinking and domestic uses. It is also part of the larger ecosystem on which bio diversity depends.
Precipitation, converted to soil and groundwater and thus accessible to vegetation and people, is the dominant pre-condition for biomass production and social development in dry lands.
The amount of available water is equivalent to the water moving through the landscape. It also fluctuates between the wet and dry periods.
Irrigation potential which exists in Tamilnadu is much more than the presently irrigated area for food security.
A variety of essential soil moisture and water conservation technologies adopted to reduce the cost of irrigation, extend it throughout and promote sustainable small-scale irrigation on a watershed basis in the PVF supported watersheds will be documented.
Watershed technologies are essential especially in drought-prone areas. Even though drought is a purely natural calamity caused by the failure of (monsoon) rain, it can be minimized by careful planning and operation.
During good rainy years, excess rainwater should be stored in the soil and also underground using suitable soil moisture conservation measures and water harvesting structures on a watershed basis. This stored water can subsequently be used for irrigation.
Actualize the vast untapped growth potential of Indian agriculture
Strengthened rural infrastructure to support faster agricultural development
Promoted value addition, accelerate the growth of agro enterprises among self help groups
Created employment in rural areas
Secured a fair standard of living for all agriculturalists and SHGs
Discouraged migration to urban areas and face the challenges arising out of economic liberalization and globalisation.
Resource mobilisation for sustainablity such as soil, farm equipment, loans and packages of practice of different crops.
Improvement of the Quality soil is one of the most important farming inputs.
High yields and good produce can be achieved only when the right type of soil is used for a certain crop.
Agriculturalists / individual entrepreneurs -setting up of small dairy farms for milk production.
Popularization of new technologies/tools/techniques for commercialization/ adoption.
Introduction of new concepts to improve farming systems.
Upgradation of skills by exchange of technical know-how.
Development of agriculture and allied sectors by better farming practices and cropping patterns, judicious use of water by introducing drip irrigation system, yield enhancement etc. as a result the village where nearly three- fourth population was below poverty line, has become self sufficient and is surplus in food grains, today.
Development of managerial skills and capability among people with low level of education, exposure and training.
Enough scope for women for self development.
An appreciable change in the attitude of the people with high degree of moral standards and ethics.
Over all improvement in the quality of life of the people, and conservation
and
use of the natural resources in a very sustainable manner.
The broad range of initial community mobilization and organization activities is as follows:
Conducting formal and informal meeting among the watershed community
Conducting awareness campaign through audio visual aids and folk songs and theatre
Preparation of audio visual aids for the awareness campaigns
Conducting Benchmark and Socio-economic Surveys to obtain baseline data
Conducting Participatory Rural Appraisals (PRAs) in all three selected watersheds
Capacity Building activities imparting training in technical, managerial, financial areas
Formation of Watershed Association and Committees
Formation of User Groups
Facilitation for preparation of participatory Perspective Watershed Development Plan
Conducting managerial and technical training to the established local level institutions
Formation and development of Self Help Groups
Conducting Participatory Evaluation based on established Performance Indicators
Facilitating post-project management and sustainable project activities.
Training in community mobilization and agriculture
Watershed management practices
Interms of purpose
To increase infiltration
To increase water holding capacity
To prevent soil erosion
Method and accomplishment
Increasing House Hold Income
Improving Agriculture Productivity.
Improving Vegetative Cover.
Increasing Milk and Horticulture Production.
Increasing Fodder and Fuel availability.
Reducing Soil Erosion & Runoff to Improve Water Availability.
Enhancing Quality and Life of Village Communities.
Use of land, water and vegetation according to its capability we can changes in knowledge, skills, attitudes for enhancing resource use efficiency and improvement in socio-economic and ecological conditions
In brief various control measures undertaken by SEVAI are:
Vegetative measures & Strip cropping
Pasture cropping
Grass land farming
Wood lands
Engineering measures
Contour bunding
Terracing
Construction of earthen embankment
Construction of check dams
Construction of farm ponds
Construction of diversion
Gully controlling structure
Rock dam
Establishment of permanent grass and vegetation
Providing vegetative and stone barriers
Construction of silt tanks dentension Influence of soil conservation measures and vegetation cover on erosion, Runoff and Nutrient loss.
Rainwater harvesting is the main component of watershed management.
Agro forestry and periodic maintenance of water soil conservation measures
SEVAI has completed the following RWH projects in three watersheds:
12 check dams
21 percolation tanks
118 farm ponds
218 gullies repaired
15 underground tanks.
Watershed impact of three watersheds:
Actualize the vast untapped growth potential of Indian agriculture
Strengthened rural infrastructure to support faster agricultural development
Promoted value addition, accelerate the growth of agro enterprises among self help groups
Created employment in rural areas
Secured a fair standard of living for all agriculturalists and SHGs
Discouraged migration to urban areas and face the challenges arising out of economic liberalization and globalisation.
Resource mobilisation for sustainablity such as soil, farm equipment, loans and packages of practice of different crops.
Improvement of the Quality soil is one of the most important farming inputs. High yields and good produce can be achieved only when the right type of soil is used for a certain crop.
Agriculturalists / individual entrepreneurs -setting up of small dairy farms for milk production.
Popularization of new technologies/tools/techniques for commercialization/ adoption.
Introduction of new concepts to improve farming systems.
Upgradation of skills by exchange of technical know-how.
Development of agriculture and allied sectors by better farming practices and cropping patterns, judicious use of water by introducing drip irrigation system, yield enhancement etc. as a result the village where nearly three- fourth population was below poverty line, has become self sufficient and is surplus in food grains, today.
Development of managerial skills and capability among people with low level of education, exposure and training.
Enough scope for women for self development.
An appreciable change in the attitude of the people with high degree of moral standards and ethics.
Over All Improvement in The Quality of Life of The People and Conservation
Improved Economy with Gender Perspective
Rain Water Harvesting through open wells, development of small water harvesting structures as low – cost farm ponds, nullah bunds, check dams, percolation tanks.
The impact of such activities is a reduction in runoff rain water in open fields, increase in water level, increase in area under cultivation and curbing of top soil erosion.
Renovation and de-silting of tanks / ponds, augmentation of water sources. This has resulted in filling irrigation gap, increase in water storage capacity, dry land cultivation being brought under wet land cultivation, conversion from single crop area to double crop area, increase in water in nearby wells and in tank itself (2-3 times) Social forestry and orchard plantations. While afforestration has lead to increase in green cover and improvement in the ecosystem, the planting of orchards has brought more wastelands under plantation with an increase in intercrop area.
The most significant advantage is the appreciation of land value under herbal cultivation. Land development and reclamation including in-situ soil and moisture conservation measures. Principally activities undertaken include reclamation of degraded and undulated wastelands to level land through land leveling thereby brought under cultivation with earthen bunding on sides.
This has controlled soil erosion, lead to increase in moisture retention capacity, increased wasteland brought under cultivation, conversion of dry land to wet land, increase in production and subsequent increase in land value indicating increase in income. Minor / Major / diversion check dams and stone bunding structures.
These minor civil structures mode of locally available materials helps in arresting top soil erosion as they are laid in slopes with over 10 percent gradient. As a result of such measures, there is increase in moisture retention in catchments areas, increase in production, conversion of wasteland into cultivable land and additional vegetative cover.
Executive Summary of the watershed
Thottiyapatty/Dasilnaickanoor and Kakayampatty.
A watershed 412 ha in three micro watersheds 25 km south of Kulitalai in Manaparai Road, in Karur District, Tamilnadu.
Problem
Low erratic rainfall averaging 700 mm per year, and recurrent droughts;
Soil erosion resulting in a reduction of cultivable land and the abandonment of severely eroded areas;
Infertile sandy soils with very low water retention and storage capacity;
Reduction in plot sizes due to land allocations to the homeless, population growth and inheritance laws;
Low crop yields and frequent failure due to drought;
Degraded communal grazing land due to overstocking;
Lowered water table because of over-exploitation;
Acute scarcity of fodder and fuelwood;
Seasonal migration of human and livestock populations;
Change from mix cropping to single crop system.
Intervention
Introducing the management of natural resources - soil, water, vegetation and animals for increased production through an integrated sustainable production system over the whole watershed;
Field testing of nationally developed dryland farming technologies;
Increasing awareness among rural people to encourage participation in the new system.
Achievements
Land protection using multi- purpose shelter belts against wind and water erosion;
Reclamation of 120 ha of wasteland through gully stopping;
Improved and sustainable source of fuel wood from shelterbelt pruning;
Increased yields from intercropping drought-tolerant high yielding crops with fast- growing, multi-purpose trees;
Increased acreages (3-4 times) of irrigated commercial crops and double cropping because of improved water harvesting;
Improved dairy output resultant on increased fodder availability;
Higher incomes through produce, sales and employment opportunities - poverty alleviation;
Improved housing, access to education, nutrition and health.;
Improved vegetation cover and biodiversity. overall achievements
A rise in groundwater level;
Recognition of the value of the integrated management of natural resources widely recognized by government ministries with the consequent policy that dry land areas be based on watershed-based integrated management.;
Replication in other areas of Rajasthan and also Gujarat, Punjab and Haryana;
Development of an instruction manual for other users.
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