Ahad Habibzadeh; Aliakbar Noroozi
Abstract
The aim of this study was to investigate the pitting and contour rainfall harvesting systems and their role in rainwater collection and forage production in rainfed conditions. This study was performed with five treatments of pitting with seeding (B), contour furrows with seeding (A), pitting without ...
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The aim of this study was to investigate the pitting and contour rainfall harvesting systems and their role in rainwater collection and forage production in rainfed conditions. This study was performed with five treatments of pitting with seeding (B), contour furrows with seeding (A), pitting without seeding (E), contour furrows without seeding (C) and control treatment (D) in three replications. FAO standard plots measuring 5x40 meters were considered for the project at Tikmehdash Research Station. In seeded treatments, Agropyron elongatum and local sainfoin were cultivated due to the effects of soil protection and forage production. Statistical analysis of the results was performed using SPSS software in the form of randomized complete blocks. The results of statistical analysis showed that the highest to lowest percentage of total canopy cover is related to contour furrows and seeding treatment with an average of 80%, pitting operations with an average of 78% and pitting and seeding with an average of 80%, respectively. Comparison of the canopy cover and forage production in the treatments showed that the canopy cover in A, B, C, D and E were not significantly different and were in the same group. Production of rangeland and succulent plants was higher in E treatment and was significantly different from A, B, C and D treatments. Also, Treatments A, B and C were not significantly different in rangeland production, but were significantly different from D (control). The highest and lowest forage production of 729.17 and 315.33 kg.ha-1 belong to pitting and control treatments, respectively.
Ali Jafari; Rasool Mahdavi; Arash Malekian; Hamid Gholami; Ahad Habibzadeh
Abstract
Groundwater is a major source of water. The management of these resources is very important answer for increasing drinking, agricultural and industrial water demands. Management measures need knowing the spatial and temporal behavior of groundwater. According to anomalous use of groundwater resources ...
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Groundwater is a major source of water. The management of these resources is very important answer for increasing drinking, agricultural and industrial water demands. Management measures need knowing the spatial and temporal behavior of groundwater. According to anomalous use of groundwater resources in this region and considering floods due to precipitation regime with severe rainfall, there is a need to investigate Hydro-geomorphological characteristics of quaternary deposits of Jam Plain. In this research, exploration-geophysical surveys of quaternary deposits within the Jam Plain was investigated. For this purpose, graphical methods, geo-electric sections draw, and preparing iso-resistance to different depths maps, reviews exploratory piezometer wells drilled within the Jam Plain by drawing the logs through the provision of wells and subsurface levels between wells; and finally, hydro-geomorphology relations of quaternary deposits were studied. Results showed that the minimum alluvial depth starts from 30 m in north-western margin at a distance of 500 m east of Jam Forest Park and its maximum depth of 95 m is in the north-western margin of the aquifer and 450 m south of Mehrbagh oil and gas well. The highest hydraulic conductivity coefficient of 2.5 m/day in Jam Plain belongs to Gachi well and its minimum of 1.06 m/day is related to Faramarzi well. Investigating the trend of changes of hydraulic conductivity coefficient showed that its rate in the eastern part of the study area was 2-2.5 m/day and decreases to 1-1.5 m/day in the western parts and in the north to south direction it decreases from 2-2.5 to 1-1.5 m/day. The spatial trend of changes in the coefficient of transmission capacity from east to west to the middle of the plain is approximately constant and is located on the floor of 180-200 m2/day, but in western areas it has fallen to 50-90 m2/day. The changes of this coefficient showed no significant changes in the north to south direction till the middle of the plain. But, decreased in the southern parts, which is the result of the reduction of the thickness of alluvium in these areas. Results demonstrated that 4810, 2186 and 5282 ha of the study area belongs to mountainous, hill and plateau and the middle areas between the plains and the mountains units.
