بررسي ارتباط بين دبي آب و ماده آلي موجود در رسوبات معلق در حوزه آبخيز جنگلي آموزشي كجور

Relationship between Flow Discharge and Organic Matter in Suspended Sediment in Koujor Educational Forest Watershed

Runoff generation and soil erosion wash out the nutrients and organic matter from the watershed and cause soil depletion. Information on organic matter loss variations is therefore very important. The present study was conducted in the Koujor Forest Watershed, with an area of 13263 ha, in order to develop the relationship between the flow discharge and the organic matter carried out by suspended sediments in that area. The study was conducted on daily and storm bases considering sand and gravel mining activities. The flow velocity was measured using current meters and floaters in normal and flood periods, respectively. The discharge is calculated accordingly. The suspended sediment and organic matter was respectively determined through sampling using the integration method and loss on ignition method. The relationship between the organic matter and the flow discharge in the study period was then assessed by applying the bivariate regression method supported by different statistical criteria. The results of the study verified the significant and inverse relationship between the variables under study.