Land use land cover (LULC) change detection based on remote sensing data is an important source of information for various decision support systems for important to land conservation, sustainable development and management of water resources. The land use/ land cover mapping has been utilised for identifying the current land use pattern and changes occurred during 2000 and 2011 using satellite remote sensing technology and GIS tools. LANDSAT satellite imageries for the period 2000 and 2011 were used to prepare the land use/land cover (LULC) maps. Study area was characterised into nine classes. The classified images showed that Shallow water, Agriculture field with crops, open field without crop and Forest areas which have been decreased while Deep water, Marshy area, Orchard with other vegetation, Barren land and Built up area have increased during this period. This research highlights that remote sensing and GIS techniques could be effectively used for development of land use/land cover plan.
Studies on soils of Navsari Agricultural University (NAU) having different cropping system were carried out in the four micro watersheds that exist in the 400 ha University campus. Soil samples from 0-15 cm depth and water samples from adjacent bore wells were collected and analyzed from different locations of micro watersheds. Soils of watersheds showed that soils texture was clay in nature, having more than 65 % clay, whereas silt was more in watershed 'A'. Soil organic carbon content (SOC) was 0.32 %, found in the field near University play ground and the highest 0.88 %, in Forestry farm, thus underlining the need of forest species in agricultural farms. SOC levels have reduced significantly due to intensive cultivation in all the watersheds. The result of exchangeable sodium percent (ESP) is supported by the topographic features, as, ESP was more in watershed 'B' (5.15) than C (2.95), this showed that infiltration rate was lesser in 'B' as compared to 'C' due to availability of more sodium (Na). Available N was highest in watershed 'A' (246 kg/ha) followed by 'C' (225 kg/ha) than 'B' (203 kg/ha), the reason was watershed 'A' had only horticulture crops whereas B and C had different crops of the region. Electrical conductivity (EC) of ground water collected from wells in watershed 'C' was found to be very high both before (3.44 dS/m) and after monsoon (2.95 dS/m), showing that water is highly saline and not fit for surface irrigation and there is need of ground water recharging.
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