Comprehensive Carbon Emission Reduction Benefits of Geheyan Hydropower Development in Qingjiang River

doi:10.11988/ckyyb.20230612

Abstract

Abstract:

With Geheyan hydropower development in Qingjiang River Basin as analysis object, the comprehensive benefit of carbon emission reduction in the whole process of hydropower development is estimated by hybrid analysis method. The results show that the carbon emission per unit power generation of Geheyan Hydropower Station is 33.22g CO_2eq/(kW·h), which is much lower than that of thermal power generation. And the tourism industry derived from hydropower development can reduce 2 282 100 tons CO₂, the shipping industry derived from hydropower development can reduce 1 060 290 tons CO₂. The derivative industry has significant benefits in reducing carbon emissions. The comprehensive annual average carbon emission reduction benefit of Geheyan hydropower development is 2 975 500 tons of CO₂. Hydropower development has very obvious benefits of carbon emission reduction, and it is a powerful means of carbon emission reduction.At the same time, derivative industries often have a low-carbon nature. In the development process, we need to consider the guidance of derivative industries as a whole to further increase the benefits of carbon emission reduction.

Key words: hydropower development, carbon emissions, carbon emission reduction, comprehensive benefits, clean energy

CLC Number:

X22环境与发展

DU Hai-long, WANG Wen-zhong. Comprehensive Carbon Emission Reduction Benefits of Geheyan Hydropower Development in Qingjiang River[J]. Journal of Yangtze River Scientific Research Institute, 2024, 41(11): 49-55.

Figures/Tables 7

Fig.1 Location of Geheyan hydropower project

Fig.2 Research framework of emission reduction of hydropower development

Table 1 Carbon emission from energy consumption during the construction of hydropower station

主要施工参数	单位	数值	综合柴油消耗		综合耗电量		碳排放/ (t CO₂)
主要施工参数	单位	数值	单位	数值	单位	数值	碳排放/ (t CO₂)
土石方明挖量	10⁴m³	520	kW·h/(100 m³)	8.49	kg/(100 m³)	478.50	78 837
石方洞挖量	10⁴m³	40	kW·h/(100 m³)	133.11	kg/(100 m³)	18.98	520
土石方回填量	10⁴m³	27	kW·h/(100 m³)		kg/(100 m³)	354.75	3 026
混凝土浇筑量	10⁴m³	328.26	kW·h/(100 m³)	451.18	kg/(100 m³)	26.69	10 554
固结灌浆量	10⁴m	18.3	kW·h/(100 m)	768.07			739
帷幕灌浆量	10⁴m	22.9	kW·h/(100 m)	1 709.72			2 058
钢筋钢材量	t	8.3	kW·h/t	70.43			—
材料运输量	t	180×10⁴					12 806
合计							108 540

Table 2 Carbon emission of materials and equipment during the construction of hydropower station

材料及设备	排放系数	系数来源	排放量/ (t CO₂ )
混凝土(8 640 000 t)	79.0 kg CO₂/t	文献[17]	682 600
钢筋、钢材(34 000 t)	2.2 t CO₂/t	文献[18]	74 800
机电设备(640.35 百万美元)	644.0 t CO₂/ 百万美元	EIO模型:其他发动机设备制造	997 800
合计			1 755 300

Fig.3 Prediction of greenhouse gas release in the 100-year life cycle of Geheyan Reservoir

Table 3 Carbon emission during operation of hydropower station

时期	类别	面积/ hm²	参数及来源			温室气体释放/t		碳排放合计/ (tCO_2eq)
时期	类别	面积/ hm²	tCO_2/ (hm²·a)	kgCH₄/ (hm²·a)	来源	CO₂	CH₄	碳排放合计/ (tCO_2eq)
运行维护								3 991 200
蓄水后前20 a	水库	6 000	—	—	—	1 138 354.48	19 788.55	1 633 068
蓄水后21~100 a	水库	6 000					53 719.24	1 342 981
蓄水前	旱地	842.61	13.70		文献[23]	11 543.69		-12 696.21
	水田	290.73	27.30	156.20	$CO 2$ [23], $CH 4$ [24]	7 937.06	45.41
	经济林	1 200.01	-27.76		文献[25]	-33 312.28
	其他				—
隔河岩水电站生命周期内淹没区本底碳排放								-126 9621
运行阶段总和								8 236 870

Table 3 Carbon emission during operation of hydropower station

时期	类别	面积/ hm²	参数及来源			温室气体释放/t		碳排放合计/ (tCO_2eq)
时期	类别	面积/ hm²	tCO_2/ (hm²·a)	kgCH₄/ (hm²·a)	来源	CO₂	CH₄	碳排放合计/ (tCO_2eq)
运行维护								3 991 200
蓄水后前20 a	水库	6 000	—	—	—	1 138 354.48	19 788.55	1 633 068
蓄水后21~100 a	水库	6 000					53 719.24	1 342 981
蓄水前	旱地	842.61	13.70		文献[23]	11 543.69		-12 696.21
	水田	290.73	27.30	156.20	$CO 2$ [23], $CH 4$ [24]	7 937.06	45.41
	经济林	1 200.01	-27.76		文献[25]	-33 312.28
	其他				—
隔河岩水电站生命周期内淹没区本底碳排放								-126 9621
运行阶段总和								8 236 870

Table 4 Benefits of carbon reduction in tourism derived from Geheyan hydropower development

年份	旅游综合收入/(亿元)	隔河岩水电站衍生贡献/%	碳减排参数/ (t CO₂ /万元)	综合碳减排效益/ (t CO₂)
2005	2.74		0.88	9 645
2010	12.76		0.19	9 698
2015	58.30		0.97	226 204
2020	41.84	40	0.63	105 437
2025				105 437
2030				105 437

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