Volume No. 7 Issue No.: 2 Page No.: 787-793 Oct. - Dec. 2012

 

INVESTIGATING GOVERNING PROCESS OF ORGANIC MATTER LOSS PROCESS IN A HYRCANIAN FOREST WATERSHED,IRAN

 

Hamzeh Noor * and Somayeh Fazli

Young researchers Club, Arak Branch, Islamic Azad University, Arak (IRAN)

 

Received on : July 10, 2012

 

ABSTRACT

 

Suspended Sediment (SS) resulted from distributed soil erosions facilitates soil organic matter transportation and influences soil depletion. Organic matter in soil (SOM) is the most important indicator of soil quality and productivity and consists of a complex. Evaluation of soil organic matter erosion processes in watershed scale is necessary for better understanding of the watershed system leading to appropriate management approaches. In the other hand, different behaviors of soil erosion as well as necessity of regional studies have been proved. The present study was conducted in Kojour watershed, Iran. To get some ideas about the storm wise OM loss, to evaluate relationship between peak of OM concentration and discharge during individual rain events and to access the applicability of rainfall and runoff variables of 7 storm events in prediction of storm-wise OM loss. Results showed that most of the OM peak preceded the peak discharge, following a clockwise hysteretic loop that exhibited hysteresis with a greater OM concentration for a given discharge occurring on the rising limb rather than on the falling limb. Results also showed that regression models had good efficiency in estimation of storm-wise OM loss with coefficient of determination and median of estimation error of above 96% and below 45%, respectively. The results could facilitate the application of given methods obtained in the present study to other engaged watershed with similar conditions and leading to the suitable soil and water management.

 

Keywords : Sediment-associated contaminant, Organic matter, Chemographs, Hyrcanian forest, Soil organic matter

 

 

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