Ecological footprint analysis of environmental impacts by cascaded exploitation of diversion-type small hydropower: a case study in southwest china
Ecological footprint analysis of environmental impacts by cascaded exploitation of diversion-type small hydropower: a case study in southwest china
复制标题
DOI：
10.1088/1755-1315/64/1/012056
复制
发表时间：
2017-05
期刊：
影响因子：
--
通讯作者：
Zhenhua Wang;Qingyun Li;Zhuo Huang;Xianqiang Tang;Weihua Zhao
中科院分区：
文献类型：
--
作者：
Zhenhua Wang;Qingyun Li;Zhuo Huang;Xianqiang Tang;Weihua Zhao
引水式小水电梯级开发在提供新能源的同时，也带来了巨大的社会经济效益，但同时也不可避免地造成了环境的扰动和破坏。以往对梯级引水式小水电累积效应的研究很少采用定量分析的方法。采用生态足迹分析方法，对我国西南某小型河流梯级引水小水电建设对生态环境的影响进行了评价。积极影响被定义为生态供应足迹（ESF），指的是通过用小水电替代木柴来保护植被。负面影响被定义为生态损失足迹（ELF），其中包括鱼类和净初级生产力损失、植被破坏和土壤侵蚀。随着引水电站数量的增加（n>4），ELF与ESF之间的差异显著增大，表明梯级引水电站对研究区的不利影响逐渐累积。与植被破坏和水土流失相比，鱼类和净生产力的累积损失是最重要的不利影响，需要更多的关注。
Cascaded exploitation of diversion-type small hydropower (SHP) offers a source of new energy as well as socioeconomic benefits; however, it inevitably causes environmental disturbance and damage. Previous studies on the cumulative effect of cascaded diversion SHP rarely discussed using quantitative analysis method. In this paper, the ecological footprint analysis approach is proposed to assess the positive and negative impacts of cascaded diversion SHP on environment of a small-scale river in Southwest China. Positive impact is defined as ecological supply footprint (ESF), which refers to vegetation protection by replacing firewood with SHP. Negative impact is defined as ecological loss footprint (ELF), which includes fish and net primary productivity loss, vegetation destruction and soil erosion. With the raising in the number (n>4) of diversion SHP stations, the difference between ELF and ESF increases remarkably, suggesting that the adverse impacts of cascaded diversion SHP accumulate in the study area. Compared with vegetation destruction and soil erosion, the cumulative loss of fish and net productivity is the most important aspect of the adverse impacts which needs more attentions.