การศึกษาผลกระทบทางสิ่งแวดล้อมที่มีต่อการวิเคราะห์ต้นทุน-ผลประโยชน์และต้นทุนการผลิตไฟฟ้าของเขื่อนเขาแหลม / ธงชัย เกษมสุขกุล = A study of environmental impact on cost-benefit analysis and electricity cost of Khao Laem Hydro Power / Thongchai Kasemsuksakul
This thesis has studied the environmental impact on Cost-Benefit analysis and actual electricity cost of Khao Laem Hydropower Dam. EGAT's project feasibility study was used as reference. The benefits and environmental impacts of this project have been reappraised i.e. electricity benefit, flood protection, irrigation benefit, carbon emission reduction, metropolitan water supply, water pollution control, forestry benefit, fishery benefit and tourism benefit and also loss of forest existence value, sustainable forestry and fertilizer sediment trapped in reservoir. The reappraisal has shown the Cost-Benefit of Khao Leam Project, which included environmental cost has EIRR 8.32%, NPV -3,821.28 MB and B/C Ratio 0.864 at discount rate 10% while EGAT's study presented EIRR 18.71%, NPV 26,307.60 MB and B/C Ratio 1.95. In addition, this study has also analysed the project benefit that disregarded environmental cost and EIRR, NPV and B/C ratio are 9.79%, -520.58 MB and 0.977 respectively. The major causes of the difference of these two studies come from the benefit overestimate in EGAT's study and the impacts of the environmental cost. Therefore Khao Leam project should be regarded as economically unfeasible. In this study has calculated the electricity production cost per unit, which is 2.548 baht, comprises of direct production cost 2.1348 baht and environmental cost 0.4131 baht. This production cost is higher than that of combined cycle plant and the buying price from Lao's electricity plant and also higher than the average EGAT’s electricity selling price to MEA and PEA.
