M.M. Gharahdaghi; E. Maroufpoor; Kh. Babaei; F. Mansouri
Abstract
Successful pressurized irrigation system accomplishment in a region is related to factors such as climatic conditions, water quality, topography condition, soil specifications, production variety and socio-economic factors. In this study a procedure has been expanded and introduced to scoring the effective ...
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Successful pressurized irrigation system accomplishment in a region is related to factors such as climatic conditions, water quality, topography condition, soil specifications, production variety and socio-economic factors. In this study a procedure has been expanded and introduced to scoring the effective factors in order to selection of pressurized irrigation system. In this procedure the degree of effectiveness are scored in 7 degrees by integer numbers of (-3) to (+3) on different factors. For preventing the equal effects of factors with different degrees of importance a coefficient as a weight of each factor has been taken into account. This coefficient on the base of special condition is determined by analytical hierarchy process. By analytical hierarchy process in corporation with geographical information system (GIS), this weight has been multiplied by the data layers. Final scores are provided by algebraic summation of each factor scores for each region. Really this score is the potential of each pressurized irrigation system. In this research potentiality of pressurized irrigation systems for 12165 hectares of down-stream lands of under study dam of Babakhan localized in Bijar of Kurdistan province is accessed and results are shown as maps with scores of each region of plan area for each pressurized irrigation systems. The results of this research show that out of 12165 hectares downstream lands of Babakhan dam, 4598 hectares (37%) were recognized proper to sprinkler irrigation and all of the investigated lands were proper to trickle irrigation. Also out of proper area for sprinkler irrigation, the portable riser sprinkler irrigation system has taken higher score and wheel move irrigation system ranked as second.
B. Rostamian; E. Maroufpoor; N. Azarboo; F. Farzankia
Abstract
Correct understanding of the factors affecting the rate of evaporation l and wind draft losses on sprinkler irrigation systems is important in order to provide guidelines for the development and utilization of water resources. This study was performed to identify the factors affecting the rate of evaporation ...
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Correct understanding of the factors affecting the rate of evaporation l and wind draft losses on sprinkler irrigation systems is important in order to provide guidelines for the development and utilization of water resources. This study was performed to identify the factors affecting the rate of evaporation and wind draft losses and also equations presents for estimating of evaporation and wind draft losses on the fixed head sprinkler irrigation systems, under various conditions of hydraulic and atmospheric. In this study sprinklers of ZK30, ZM22 and AMBO was used. The tests were carried out at the University of Kurdistan research farm located in the village of Doshan with single sprinkler method Accordance with the ISO 7749-1 and ISIRI 8995-3 standards. Evaporation and wind draft Losses were measured at different applied pressures under various conditions of atmospheric. The results showed that parameters of vapor pressure deficit and temperatures had the highest correlation with evaporation and wind draft losses in all three types of sprinklers, and this correlation is significant at the 1% probability level. Also results showed that the correlation between wind velocity and losses is in sprinklers of ZM22 and ZK30 significant at the 1% and 5% probability level respectively and in the sprinkler AMBO is no significant correlation. In overall evaporation and wind draft losses increase to 9.4 percent by increasing of 1 meter per second of wind velocity.
