تاثیر اصلاح‌کننده‌های خاک روی تعییرات آب‌نمود و رسوب‌نمود در شرایط آزمایشگاهی

Insufficient information regarding the time distribution of runoff and sediment yield during a storm event is one of the available major issues in the success soil and water conservation projects. However, limited studies have been considered in various scales and especially in cooperation with application of amendments on hydrograph and sediment graphs. Hence, the present laboratory research was conducted in order to investigate the effect soil organic (rice straw mulch and manure with rates of 0.5 and 0.3 kg m-2) and inorganic (TA-200 polyacryamide with rate of 0.05 kg m-2) amendments on output runoff and sediment from plot. The study was run under completely randomized design using three treatments with three replications and slope of 30 percent for loamy-sand soils collected  from depth of 0-20 cm of the Alborz summer rangeland in north of Iran with simulated rainfall intensities of 30, 50, 70 and 90 mm h-1. The results showed that the conservation treatments had significant effect (P<0.05) on hydrograph and sediment graph changes compared to the control treatment. In addition, the hydrograph and sediment graph changes in various rainfall intensities showed that the straw mulch treatment had more effect (45.60 percent compared to other and control treatments) on hydrograph and sediment graph.