designing of rainwater collecting systems in micro catchment by using awbm model for cultivating of forage maize sc704.

one of the major sectors of water loss is the loss of rain runoff. kirkby (2001) the effect of soil surface characteristics in the production of runoff in time and space scales concluded that soil properties such as undulating, soil texture and structure on the amount and spatial pattern of runoff are effective. in this research that was conducted in the latian watershed, twenty experimental plot manufacturer runoff collected at the end they were constructed bankettes longitudinal dimension equal to the width of runoff plot, poster collection, depth 0.5 meter and width of 0.5 meter was constructed. depth of rainfall runoff from natural and 12 each with artificial rainfall intensity rainfall simulator with 8 mm to 42 mm per hour was established, was measured. since the end bankettes within plots were covered with plastic, all collected runoff was measured on it. the plastic cover was pulled out of water completely penetrating bankette. after 24 hours on bankette collected water depth was measured so that how deep the penetration has. after the plastic cover was created to prepare for the next runoff is measured. part of the rainwater collected in a barrel with a volume of 220 liter were stored on the first of the spring was covered with a plastic cover to prevent evaporation of collected water for limited irrigation water supply in june to 30 july to 15 of 62 mm were used and in forage maize plots nine branches were planted sc704. the results showed that compared with the yield ratios of 1:1, 2:1 and 3:1 (ratio of surface runoff collected rain manufacturer of level of corn planted) yield of forage corn, respectively 9.6, 22.6 and 28.8 t.ha respectively. whereas in the control treatment, there was no water limitation and the rate of 41.5 t.ha of forage maize yield was, the total water used in the three above treatments, respectively 616, 696 and 776 mm was. (in addition to direct rain water collected from runoff) and supplementary irrigation water depths in all three treatments was 62 mm. thus yield respectively 23, 55 and 69 percent compared to the control (grown with full irrigation) has been. in this research the effect of vegetation and soil in runoff amounts were compared.