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The Narmada canal command area (NCCA) of the Saurashtra region supports plethora of herbaceous angiosperms. The portion of NCCA located in Bhavnagar, Botad, Morbi and Surendranagar districts had been investigated for inventorying in pre-monsoon and post-monsoon seasons from February 2018 to November 2019 through quadrat and transect methods. The Narmada canal command area (NCCA) in Saurashtra region is inhabited by 201 species during the pre-monsoon season and 259 herbaceous species during the post-Monsoon season. In the canal command area density, abundance, frequency and species composition of various species of herbs and grasses varied seasonally. The Simpson diversity index changed only slightly indicating that species diversity did not change noticeably between pre-monsoon (lean) season and post-monsoon season. Moreover, Menhinick's index of species richness also indicated that herbaceous plant species richness did not change noticeably from pre-monsoon to post-monsoon period in the NCCA. Relatively good status of species richness and species diversity of herbaceous species during pre-monsoon (lean) season possibly due to water availability from Narmada canal might be a reason for such insignificant difference between pre-monsoon and post-monsoon scenarios.
In the current study, to understand LULC changes during the period from 2005-2016 in Rajkot Municipal Corporation, the digitalised satellite imageries (LISS-IV) were assessed and interpreted. During investigation and analysis, various LULC categories such as open land/area and water bodies had shown a gradual decline by 66.19 ha (0.79%) and 156.73 ha (41.60%) respectively during the period. Moreover, the analysis showed a gradual increase in built-up area by 198.13 ha (16.50%) during the same period. Some fluctuation in dense tree cover and open tree cover have been observed in these years i.e. 2005, 2011 and 2016. The dense tree cover was found fluctuating in each assessment year from 2005 to 2016 but its overall analysis showed declining status of the dense tree cover by 33.18 ha (20.87%). On the other hand, the open tree cover was found to have increased by 57.97 ha (22.47%) during the period from 2005-2016. Findings of the current study can be utilised in town designing and planning for future development in sustainable management of the city.
In the present study, nutrient status especially Organic Carbon (OC), Total Nitrogen (TN) and Carbon and Nitrogen (C/N) ratio have been investigated in the soils taken from location inside forest from 3 different forest types, 3 density classes and 3 topographies as well as from 2 location outside forest areas for each forest types. Soil samples were collected from two depths from each location within 10 days to maintain uniformity in the collected soil samples. Thus, a total of 270 soil samples were collected and analysed. The soil analysis from these areas showed an increasing trends of average OC, TN (except RF) and decreasing trends of C/N ratio (except in MDF) across soil collected from outside forest, Dry Deciduous Forest (DDF), Moist Deciduous Forest (MDF) and Riverine Forest (RF). The value of OC was observed to be 1.31%±0.58, 1.34%±0.63 SD, 1.38%±0.63 SD and 1.51%±0.61 respectively. Average concentration of TN was found to be 0.12%±0.04, 0.13%±0.05 SD, 0.16%±0.067 SD and 0.14%±0.048 SD in outside forest, DDF, MDF and RF, respectively. Accordingly, the C/N ratio of soil was found to be 11.13, 10.90, 10.95 and 10.63 in outside forest, DDF, MDF and RF, respectively. Furthermore, comparing the result across the two soil layers showed that the value of C/N ratio was higher in second layer of soil in all location. Lastly, it was also concluded the C/N ratio inside forest as well as 1 km outside forest was less than 25 in all the sample location which indicates fertile soil in the study area.
p>The objective of the present study was to assess the water quality of canal (man-made lotic waterbody) and ponds (man-made lentic waterbodies) present in Narmada Canal Command Area (NCCA) spread over four districts of Saurashtra region of Gujarat State, viz. Bhavnagar, Botad, Morbi, Surendranagar districts. Values of important physico-chemical parameters of water quality were determined through in situ and ex situ methods. Average values of parameters like pH (8.51), temperature (27.91 °C), electrical conductivity (6.32 ms/cm), TDS (559.18 ppm) turbidity (147.95 NTU), salinity (3.17 ppt) and phosphates (3.41mg/l) were found to be higher for pond waters, whereas the average values of DO (6.09 mg/l), total hardness (308.00 mg/l) and nitrates (2.37 mg/l) were found to be higher for the canal waters in the NCCA in the four districts. The study revealed that water quality of canals in the four districts was suitable for flora and fauna. For some ponds (n = 6) in Bhavnagar, Surendranagar and Morbi districts, the majority of water quality parameters, viz. pH, temperature, electrical conductivity, TDS, turbidity, salinity and phosphates had high values which might be undesirable from the view point of existence of some aquatic organisms. But as the values of these parameters for canal waters were lower and suitable for aquatic organisms, it is very likely that in the long run, the values of these water quality parameters of such ponds will become suitable for aquatic biota under the influence of long-term mixing of pond waters with canal waters having lower values of these parameters.</p