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Afforestation of catchments reduces water yield. On hydroelectric power catchments, land uses can be compared in terms of energy production. On the Maentwrog catchment, Wales, forestry appeared highly energyefficient before inclusion of HEP losses, with ratios of energy input to energy output of 1:16-21. Inclusion of HEP losses reduced ratios to l :OS-3. A study of 41 sites on catchments in North Scotland showed that at the majorlty, afforestation would lead to net energy gain. However, in discounted cash flow terms, most potential afforestation sites were unprofitable when HEP losses were included. The balance of advantage depends crucially upon the criterion chosen and site conditions. Afforestation at high elevations...
Carbon sequestration has been well recognized as a viable option to slow the rise in atmospheric greenhouse gas concentration. The main goals of this study were to assess the carbon sequestration potential (CSP) by afforestation of marginal agricultural land (MagLand) and to identify hotspots for potential afforestation activities in the U.S. Midwest region (Michigan (MI), Indiana (IN), Ohio, Kentucky (KY), West Virginia, Pennsylvania (PA) and Maryland (MD)). The 1992 USGS National Land Cover Dataset and the State Soil Geographic (STATSGO) database were used to determine MagLand. Two forest types (coniferous and deciduous) and two management practices (short-rotation versus permanent forest) were combined to form...