Detailed Project Report - Commissionerate of Rural Development ...

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District Watershed Development Unit - Jamnagar Dam: Percolation dams are constructed for recharging groundwater. Such structures are usually made on the upper part of the catchment area. Water stored here percolates to wells and tubewells located in the lower part of the catchments. Such dams can also be made in the immediate upstream portion of wells and tubewells. Depending on the capacity of the dam and duration of water storage, the dam can have secondary benefits (such as pisciculture) that are vital for the livelihood security of marginal farmers and landless laborers. 2) Irrigation/Percolation dam a) Irrigation Dam: Such dams can be constructed to meet two different kinds of demands. of storing water during the rainy season to be used for irrigation in the post-monsoon period. of providing protective irrigation during dry spells within the rainy season. Most parts of India typically receive rainfall between June and September, very intensely within a few hours and a few days. The number of rainy days does not average more than 40-50. Moreover, rains are extremely erratic, often characterized by late onset and early withdrawal. Prolonged dry spells during the rainy season, resulting in agricultural droughts, are also frequent. Hence, the kharif crop needs to be drought-proofed through 'protective' irrigation, applied to overcome accumulated soil moisture deficits within the rainy season. Such structures are especially important in areas which are poor in groundwater resources and which do not have access to canal irrigation. Such areas form about half of India's agricultural area. b). Percolation Tank: Percolation dams are constructed for recharging groundwater. Such structures are usually made on the upper part of the catchment area. Water stored here percolates to wells and tube wells located in the lower part of the catchment. Such dams can also be made in the immediate upstream portion of wells and tube wells. Depending on the capacity of the dam and duration of water storage, the dam can have secondary benefits (such as pisciculture) that are vital for the livelihood security of marginal farmers and landless labourers. 3) Farm bund Farm bunds are constructed on agricultural land with the aim of arresting soil erosion and improving the soil moisture profile. Ideally, bunds on farms should be made on the contour line. But this creates several problems for farmers. Contour bunds divide the field into irregular sections. In Detailed Project Report – IWMP-1 (Patan )
District Watershed Development Unit - Jamnagar such a situation, it becomes inconvenient to maneuver bullocks for operations such as ploughing and line-sowing. 4) Afforestation a. Emphasis is placed on maximizing the use of available land and resources with high yield tree species. Trees can either be of similar species or mixed in a manner that will result in a stand or forest. Depending on the climate, geographical layout of the area and the soil conditions, trees that have the greatest growth potential are selected like Babool, Neem, Sesame and Ailanthus Table no.36: Activities related to Surface water resources in the project areas (all financial figures in lakh Rs.) S. No. Village name Proposed target Augmentation/ repair of existing structures Construction of new structures Total target Type of structures Area to Area to Area to Storage Estimated Estimated Estimated be be Storage be Storage No. capacity cost No. cost(in cost(in irrigated irrigated capacity irrigated capacity (Cumec) (Lac) Lack) Lack) (ha) (ha) (ha) (i) Farm Pond 0 0 0 0 7 40 3500 0.56 40 3500 0.56 (ii)Irrigation/Percolation 1 10 25000 9.25 0 0 0 0 10 25000 9.25 Patan Tank (iii) Check dam 7 250 50000 4.40 14 280 115000 29.91 540 165000 34.31 (iv)Causeway cum check 0 0 0 0 3 105 8945 8.25 105 8945 8.25 dam Paradava (i) Farm Pond 0 0 0 0 5 35 2670 0.40 35 2670 0.40 Detailed Project Report – IWMP-1 (Patan )
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GUJARAT STATE WATERSHED MANAGEMENT
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District Watershed Development Unit
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