Abstract
BackgroundGlobal warming as a result of increased greenhouse gases (GHGs) concentration in the atmosphere is threating the existence of life on earth. Reducing the concentration of such gases with sequestering mechanism on the surface of the land helps to treat the problem. One of such methods is trapping carbon in the form of soil organic carbon (SOC) together with sediments, by implementing sediment trapping practices. Direct field measurements, calculations and laboratory analysis were used.ResultsThe result shows that sediment storage dams (SSDs) sequestered/trapped ~ 60.97*103 t of sediment with the SOC content ranged from 14 to 87 g kg− 1 and check dams (CDs) trapped 7.8*103 t of sediment with the SOC content ranged from 20 to 290 g kg− 1. In general, the studied SSDs and CDs sequestered ~ 44.68*105 kg of SOC together with ~ 68.8*106 kg of sediment. In this study, SSDs and CDs were found to be important SOC sequestering practices together with sediments.ConclusionsThus, it is concluded that soil and water conservation structures can be used as carbon sequestering methods to reduce the concentration of GHGs in the atmosphere in addition to reducing soil erosion.
Highlights
Global warming will continue being a critical problem in the twenty-first century due to increased carbon dioxide and other greenhouse gases (GHGs) concentration in the atmosphere
Study area description The study was conducted in the Amhara National Regional State, northwest Ethiopia (Fig. 1), at eight sediment storage dams constructed at the outlet of micro-watersheds with an area ranging from 35 to 105 ha (Segno Gebeya, Woybila, Shehena Borkena, Enchet Kab, Tigrie Mender, Worka Wotu, Dodota, Wuha Chale) and six check dams constructed within gullies for the purpose of gully treatment (Rim/Debre Yakob, Minizr/ Adibera, Gosheye, Debre Mewi, Debre Tabor and Bure)
Research methods Measuring trapped sediment In this study, eight sediment storage dams (SSDs) and six check dams (CDs) were selected and the amount of sediment trapped behind each structure was measured based on the geometric nature of the gullies, SSD/CD dimensions and the area of sediment deposition using GPS and measuring tape
Summary
Global warming will continue being a critical problem in the twenty-first century due to increased carbon dioxide and other greenhouse gases (GHGs) concentration in the atmosphere. Global warming as a result of increased greenhouse gases (GHGs) concentration in the atmosphere is threating the existence of life on earth. Reducing the concentration of such gases with sequestering mechanism on the surface of the land helps to treat the problem. One of such methods is trapping carbon in the form of soil organic carbon (SOC) together with sediments, by implementing sediment trapping practices. SSDs and CDs were found to be important SOC sequestering practices together with sediments
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