Measuring and Mapping the Impact of Land Use and Land Cover Change on the Hydropower Production—A Case Study of Jiulong River in Fujian Province
Abstract: As the most widely used form of renewable energy in the world, the hydropower production is very sensitive to the land use and cover change (LUCC). Measuring and mapping changes in the quantity and value of hydropower production are the basis of water resource management and watershed spatial planning. This paper evaluated the impacts of LUCC on the hydropower production in Jiulong River watershed (JRW) employing the reservoir hydropower production and valuation model of InVEST. The results show that the water yield increased by 0.66% from 2000 to 2010 in JRW since LUCC is mainly converted from arable land and forest with higher evapotranspiration to construction land with lower evapotranspiration. However, the annual water supply for power generation decreased by 8.46%, due to the water consumption in arable land and construction land are higher than other land cover type, which resulted in 1.22 × 108 kwh decrease of the annual hydropower production and 4.0 × 107 yuan decrease of net present value separately. The reduction of hydropower production and its value are mainly located in urban subwatersheds whose land use cover change significantly by transforming the forest and arable land to the construction land. The model error is in the range of 6% and 5% of the actual water production and power generation respectively, and the model has high reliability. The results also show that the volume of water yield decreased from upstream to downstream, and the hy-dropower production capacity of subwatersheds in upstream is much higher than that of the down-stream. The subwatersheds in the upstream with higher water yield are critical to the water supply services in the JRW, which should be conserved when developing the spatial planning and other so-cial-economic planning in the watershed.
文章引用: 黄珠美 , 彭本荣 (2017) 土地利用与覆被变化对流域水电生产影响研究—福建省九龙江流域为例。 水资源研究， 6， 370-383. doi: 10.12677/JWRR.2017.64044
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