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Water resourse planning of patan branch canal command area through RS & GIS
The final composite units were enumerated as various types of homogeneous units of polygons. These would fit into one or the other combinations of the decision rules as explained in table 1. Recommendation was than made on the decision rules. Similarly recommendations were made for all other homogeneous polygons. The Recommendation made was again discussed among experts and finalized plans were prepared. 
Result & Discussions: The value of contours is ranging from 360 meters to 420 meters. The 0 to 1% slope class is maximum 79263 ha followed by 1 to 3% slope class 4019 ha; other slope classes were in patches. The area under settlement is around 1491 ha. It was found that the NH-12, Patan road and central railway are the major network of transport. Part of drain lines heading towards north oriented joins the river Pariyat and Hiran whereas the southern drain lines joins Narmada river. Soils were broadly classified as calcareous clay near the river Narmada, clay with loam in central part, deep clay near the Pariyat and Hiran and in the south west corner of command. The dominating categories in the field were older alluvium plain in 69891 ha and younger alluvium plain in 13102 ha. Few patches of structural plain and structural hill were also found. Land use classes in PBC Command was shown in following table, which were generated from NDVI map.
Water tables fluctuate from pre monsoon to post monsoon season. Water table fluctuation was found ranging from 2 meter to 4 meter in different parts of command. Higher fluctuation shows more recharge during the rainy season. These fluctuations when combined with the aquifer properties resulted in to ground water availability for the post monsoon period. The discharge of ground water available from 75 to 150 m3/day. This was also taken into consideration for assessing the ground water potential. Data of depth to water table in open wells was collected in command area. These depths vary from 1 meter to 10 meter. Integration of Theme Map: For generation of water resource action planning integration of different themes i.e. soil, geomorphology, slope, land use / land cover, canal water availability and ground water potential was accomplished. The resulting map has identifier domain. The large numbers of polygons occurred in this map. Combinations of smaller areas are merged. Area that is, more than 100 hectare belonging to different combination of these six themes were selected for water resource planning. Fig 2 presents the cross map of all six themes. |