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Comparison of GPP and Hydrological Organic Carbon  Flux: A Catchment Scale Approach

Comparison of GPP and Hydrological Organic Carbon Flux: A Catchment Scale Approach

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  • ISBN-13: 9783838300696
  • Publisher: LAP LAMBERT Academic Publishing
  • Release Date: Mar 26, 2009
  • Pages: 432 pages
  • Dimensions: 0.98 x 8.66 x 5.91 inches

Overview

This book presents a catchment scale case study investigation into the export of organic carbon through a river system in comparison with carbon that is produced by vegetation through photosynthesis. The research discusses the use of a hydrological simulation model to analyse organic carbon samples from stream and tributaries. The gross primary productivity of the vegetation cover in the catchment was estimated using a radiation use efficiency model driven by MODIS TERRA data on vegetation greenness and modeled surface irradiance. The relationship between total organic carbon discharged in-stream and total carbon uptake by plants was assessed using a cross- correlation analysis. The results of the hydrologic modeling approach and terrestrial GPP outcome were compared. This comparison revealed the likely proportion of catchment GPP that contributes to in-stream hydrological flux of organic carbon. Total Organic Carbon Load was 0.45% of GPP. As a result, it can be concluded that the hydrological flux of organic carbon in a forested catchment is a function of gross primary productivity.

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