Irrigation and drainage networks construction are affecting the quality and quantity of groundwater. This study aims to evaluate the quantitative and qualitative changes of Mianab Shushtar plain aquifer after the construction of irrigation and drainage network in 2008. More
Irrigation and drainage networks construction are affecting the quality and quantity of groundwater. This study aims to evaluate the quantitative and qualitative changes of Mianab Shushtar plain aquifer after the construction of irrigation and drainage network in 2008. First by checking annual hydrograph of the plain, the changes of ground water storage volume during years of before and after the implementation of irrigation and drainage network were evaluated. During 2005-06 to 2008-09 in the third year, 6.4 million cubic meters of underground water reservoir storage volume decreased and from 2008-09 to 2013-14, 9.07 million cubic meters of underground water storage volume has been added. With comparison in the same period, it was found that change in the reservoir is largely influenced by the amount of annual precipitation. Then calculate the groundwater balance, factors affecting the reservoir volume changes were studied. The results showed that 2008-09 and 2009-10 balance was -3.59 and 5.44. Most important factor in changes in groundwater reservoir was the amount of annual rainfall and operation of the network had not a significant impact in increasing the groundwater level. In the following to investigate qualitative changes of underground water sources, the Wilcox diagram for two years before and after the construction of irrigation and drainage network was used. The results showed that due to high groundwater level before the network operation, more sampling points was in class of too salty and unusable for agriculture. Therefore network operation had not significant effect in the quality of groundwater resources.
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Whereas the perception of present species in under management areas is one of the most important bases in the wildlife management, so this study was carried out in order to determination of vertebrates fauna in Dez area from 19 February 2010 to 6 October 2011. In this s More
Whereas the perception of present species in under management areas is one of the most important bases in the wildlife management, so this study was carried out in order to determination of vertebrates fauna in Dez area from 19 February 2010 to 6 October 2011. In this study direct observation and remaining signs such as pellet, track and carrion; for all orders were used also for gathering the species such as turtles and amphibians the creel with 60andtimes;60 mm mesh size were utilized too. Generally during the 70 visits within the area 81 vertebrates consist of 65 birds in 49 genuses, 34 families and 11 orders were recorded which the globally endangered Marbled Teal Marmaronetta angustirostris and Houbara Bustard Chlamydotis macqueenii were of them. Of mammals 7 species in 6 genuses, 5 families and 4 orders were observed that Sand Fox was the only protected species of them. Also of reptiles 8 species in 7 genuses, 7 families and 2 orders were recognized that globally endangered Mesopotamian soft-shelled turtle was of them. Just one species of amphibians Marsh Frog Rana ridibunda were seen in the area.
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The collared dove,Streptopelia decaocto belongs to family Columbidae, and is one of the most common species in Khouzestan Province. This study was carried out from April 8th 2011 to Jun 24th 2011. Reproductive behavior of Collared Dove, Streptopelia decaocto started at More
The collared dove,Streptopelia decaocto belongs to family Columbidae, and is one of the most common species in Khouzestan Province. This study was carried out from April 8th 2011 to Jun 24th 2011. Reproductive behavior of Collared Dove, Streptopelia decaocto started at April 27th with observation of egg laying behavior and finished at Jun 24th with flight of last fledging. During the study period 19 nests of Collared Dove (Streptopelia decaocto) were surveyed. Breeding success was 46.48% was calculated. Breeding rate in the hatching,Nestling and Post-Nestling stages were calculated 60.52%, 42.10% and 36.84% respectively. There was significant difference between mortality in various stages (Pandlt;0.05). According to the Mann Whitney U test results, there was significant difference between the success in touched and untouched nests (Pandlt;0.05). Two Most important factors that decrease the success rate were predatory and climatic turmoil respectively that cause to eggs destroying and this occurrence happened in the start of reproductive season.
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