تحلیل رسوب‌دهی آبخیزهای کوچک در پایگاه تحقیقات حفاظت خاک سنگانه

Accelerated soil erosion and severe sediment production disrupts the natural balance in watersheds and has off-site impacts on river channels and downstream reservoirs. There are different estimates of soil erosion and sediment yield in Iran. But what the researchers agree on is that it is more than tolerable erosion. Rangelands cover more than half of Iran, and poorly covered lands play a large role in flood and sediment production. Therefore, the study of hydrology and soil erosion is necessary for sustainable use of pastures. The prerequisite for these studies is long-term monitoring of sediment, runoff, vegetation, soil, etc. A careful review of previous researches on rangeland hydrology shows that most studies have focused on the effect of grazing management at the plot scale or have used simulation approaches and experimental models, as well as in a short period of time. Therefore, it is very necessary to conduct scientific research using long-term monitoring data in experimental watersheds. In this regard, the present study was proposed with the aim of evaluating the sediment yield of small watersheds in pastures with grazing exclusion vs. overgrazing. The results of this research can provide useful information to researchers, promoters, planners and ranchers.