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Articles by S. Boroomand-Nasab
Total Records ( 3 ) for S. Boroomand-Nasab
  A. Landi , S. Boroomand-Nasab , M. Behzad , M.R. Tondrow , M. Albaji and A. Jazaieri
  The main objective of this research is to compare different irrigation methods based upon a parametric evaluation system in an area of 43700 ha in the Fakkeh region located in Elam Province, West Iran. Soil properties of the study area including texture, depth, electrical conductivity, drainage, calcium carbonate content and slope were derived from a semi-detailed soil study regarding Fakkeh plain in a scale of 1:20000. After analyzing and evaluating soil properties, suitability maps were generated for surface, sprinkle and drip Irrigation methods by means of Remote Sensing (RS) Technique and Geographic Information System (GIS). The results showed that 1715 ha (3.93%) of the studied area were highly suitable for surface irrigation method whereas 7365 ha (16.86%) of the study area highly suitable for sprinkle irrigation methods. Also, it was found that 28190 ha (64.51%) of the study area were highly suitable for drip irrigation methods while some land units coded 1.1, 7.1 and 4.1 covering an area of 9335 ha (21.36%) were not suitable to be used for surface irrigation systems and one land unit coded 7.1 with an area of 735 ha (1.68%) was classified as unsuitable for sprinkle and drip irrigation systems. The results demonstrated that by applying drip irrigation method instead of surface and sprinkle irrigation methods, land suitability classes of 36790 ha (84.19%) for Fakkeh Plain will improve. Also, by applying sprinkle Irrigation instead of surface and drip irrigation methods, land suitability classes of 6945 ha (15.89%) of this plain will improve. The comparison of the different types of irrigation techniques revealed that the drip irrigation was more effective and efficient than the surface and sprinkle irrigation methods for improving the suitability to the irrigation purposes. Also, the sprinkle irrigation was more useful than surface irrigation method. Additionally, the main limiting factor in using surface and sprinkle irrigation methods in this area was soil texture and the main limiting factor in using drip irrigation methods was soil calcium carbonate content.
  G. Ainechee , S. Boroomand-Nasab and M. Behzad
  Information on moisture distribution patterns under point source trickle emitters is a pre-requisite for the design and operation of trickle irrigation systems. This will ensure precise placement of water and fertilizer in the active root zone. The distribution pattern is influenced by the soil properties and the behavior of applied water. In this study, water movement in three soil types from a surface point source was investigated. Experimentation included determination of maximum depths and widths of wetted zone after one hour time interval of water application. The surface wetted radius increased with an increase in application rate. A good relationship was found between the surface wetted radius and the volume of water applied. This suggested that for a certain volume of water applied, a corresponding wetted surface radius can be predicted. The numerical values of wetted surface radius for each flow rate group were compared with those predicted by the suggested equations. Predictability of model was estimated as 96.8 and 95.3%, respectively, for prediction of wetted width and depth. The results showed good agreement for all application rates.
  H. Moazed , A. Bavi , S. Boroomand-Nasab , A. Naseri and M. Albaji
  In order to study the effects of different wind conditions, operating pressures, various sprinklers layouts and spacing on water distribution uniformity in sprinkler irrigation system a research project was conducted under 3 different wind velocities (0-5, 5-7 and > 7 m sec-1), using 3 operating pressure (35, 40 and 45 m), three spacing on the lateral pipeline (15, 18 and 21 m) and 3 different layouts (square, rectangular and triangular). Simulation experiments were conducted to estimate water distribution uniformity. The results indicated that the distribution coefficient uniformity decreased with the increase of the wind velocity. With the increase of wind velocity up to 7 m sec-1, the decrease of coefficient uniformity was not significant (the coefficient was reduced by 20% in the range of wind velocity applied). The highest water distribution coefficient uniformity was occurred on 15x5 m spacing while the lowest value was achieved for spacing of 21x21 m and sprinkler spacing to spray diameter of 0.5x0.5 with the increase of sprinklers spacing to the spray diameter, coefficient uniformity is reduced, especially at higher wind velocities. Therefore at higher wind velocities, it is recommended to reduce sprinklers spacing to spray diameter ratio and use square arrangement in order to achieve acceptable uniformity.
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