جغرافیا و آمایش شهری منطقهای (Mar 2017)
Comparing Between two Methods Stoage of Precipitation (Pitting and Contour Furrowing) on Vegetation Cover in Iranshar Area
Abstract
The aim of this research is control of run off and its storage in the ground in other to increase th evegetation cover through increase soil moisture. In this research, the effects of two mechanical structure of pitting and contour furrowing techniques in comparison with the witness on the changes of vegetation cover of the adjacent area of Iranshahr thermal powerplant were studied. In this relation, for recognition of the effect of each structure and the presence of vegetation cover, by three pitting, contour furrowing and witness in four repetition of a slope of about 3% has been conducted in the form of a full random statistical plan form. For this purpose, with respect to the amount of input run off, some rigs with dimension of 20*40 m , by considering the slope direction were established and at the farthest end of each rig, some basins have been constructed for run off measuring.Upon each growing season, the measurement of vegetation cover has been made and at the end of the research, the data were intered in to SPSS software and statistical analysis have been made on them. The findings indicated that there is a significant difference( 0.01%) between different treatments ( witness, pitting ,contour furrowing) from the view point of producing fodder , percentage of vegetation cover and young plants. It means that the performance of storage operations of precipitation is effective on the amount of foddy the vegetation cover. Variance analysis of witness treatment and pitting by lSD sttatistical method showed that the amount of obtained LSD (0.113) is more than the mean differences of witness and pitting treatment. On the other words, performing pitting operations has no effect on the increase of foddy production. Also comparing the data of witness and contour furrowing treatments, revealed that LSD amount has a lower significant difference than the mean difference of contour furrowing and witness. Therefore, performing contour furrowing operations has had a positive impact on foddy production.
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