Review of methodology for estimation of labile organic carbon in reservoirs and lakes for GHG emission

Organic carbon (oc) can be classified into three main categories: labile,semi labile and refractory. the area of research is primarily focused on the labile organic carbon (loc) as it is considered highly reactive indicator of green house gas (ghg) emission from reservoirs and lakes. the co2 or ch4 release from sediment oc depends on its source and temperature of the reservoirs. the several analytical methods are available to determine and evaluate loc based on physical,chemical and biochemical methods. a review of the advantages and disadvantages of each technique has indicated that none of the methods can be used to determine loc precisely either because a part of the loc is not involved or its further characterization is apparently missing. the approach is an omnipotent tool for the measurement of loc. the present paper reviews the methodologies for estimating loc and other types of organic carbon like loc which plays crucial role in estimating the ghg emissions from reservoirs /lakes and lays the emphasis only on loc (doc,dic and poc) due to its rapid degradation for the release of ghg compared to other 'c' types.