Gross greenhouse gas fluxes from hydro-power reservoir compared to thermo-power plants

摘要: Abstract This paper presents the findings of gross carbon dioxide and methane emissions measurements in several Brazilian hydro-reservoirs, compared to thermo power generation. The term ‘gross emissions’ means gas flux from reservoir surface without natural pre-impoundment by bodies such as river channel, seasonal flooding terrestrial ecosystems. net result deducting pre-existing reservoir. A dam emits biogenic gases CO 2 CH 4 . However, studies comparing (gross emissions) with thermo-power generation technologies show that hydro-based option better results most cases analyzed. In this study, were carried Miranda, Barra Bonita, Segredo, Tres Marias, Xingo, Samuel Tucurui reservoirs, located two different climatological regimes. Additional data used here taken at Itaipu Serra da Mesa reservoirs. Comparisons also made between hydro-power plants their thermo-based equivalents. Bearing mind estimated values for include are not totally anthropogenic, studied generally posted lower than equivalent counterparts. Hydro-power complexes greater densities (capacity/area flooded—W/m ), Itaipu, Segredo have best performance, well above using state-of-the-art technology: combined cycle fueled gas, 50% efficiency. On other hand, some low-power density perform only slightly or even worse