Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR024758 |
Hydropower Flushing Events Cause Severe Loss of Macrozoobenthos in Alpine Streams | |
Gabbud, C.; Bakker, M.; Clemencon, M.; Lane, S. N. | |
2019-12-03 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:12页码:10056-10081 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland |
英文摘要 | Alpine hydroelectric power exploitation often aims to increase the volume of water stored behind impoundments, which may be achieved through flow abstraction and lateral transfer to storage. Intakes are designed to separate water from sediment which accumulates in settling basins and may be flushed sometimes at subdaily frequencies in glaciated basins. In some countries (e.g., Switzerland) intakes drain a greater basin area than impoundments yet legislation designed to improve instream ecosystems impacted by hydropower has almost entirely ignored them. Some research suggests that such streams have exceptionally low abundance and diversity of macroinvertebrates for some kilometers downstream of the intake flushing at high frequency in summer, but that populations can recover rapidly as soon as flushing frequency decreases in early autumn. However, such patterns could also result from natural flow variability, sediment transport, and morphological change in glacier-fed streams. We combine field measurements with habitat modeling to assess the impacts of sediment flushing on macrozoobenthos as compared to what might be expected in a natural, hydromorphologically dynamic Alpine stream. We show that water abstraction in itself could improve habitat conditions because it increases the relative contribution of less turbid and groundwater/unregulated sources. However, intake flushing leads to short duration, sediment-laden flows that can destabilize substantial areas of the stream bed and cause rates of lateral displacement of habitat much greater than the possible response by macroinvertebrates. Our results challenge current emphasis on minimum flows in such streams and argue that much more emphasis needs to be placed on sediment management. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000500034600001 |
WOS关键词 | HABITAT SUITABILITY MODELS ; ALTERED FLOW REGIMES ; GRAVEL-BED RIVERS ; INVERTEBRATE DRIFT ; AQUATIC HABITAT ; INSTREAM FLOW ; MACROINVERTEBRATE COMMUNITIES ; BENTHIC MACROINVERTEBRATES ; HYDRAULIC PREFERENCES ; SEDIMENT TRANSPORT |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/223948 |
专题 | 资源环境科学 |
作者单位 | Univ Lausanne, Inst Earth Surface Dynam IDYST, Lausanne, Switzerland |
推荐引用方式 GB/T 7714 | Gabbud, C.,Bakker, M.,Clemencon, M.,et al. Hydropower Flushing Events Cause Severe Loss of Macrozoobenthos in Alpine Streams[J]. WATER RESOURCES RESEARCH,2019,55(12):10056-10081. |
APA | Gabbud, C.,Bakker, M.,Clemencon, M.,&Lane, S. N..(2019).Hydropower Flushing Events Cause Severe Loss of Macrozoobenthos in Alpine Streams.WATER RESOURCES RESEARCH,55(12),10056-10081. |
MLA | Gabbud, C.,et al."Hydropower Flushing Events Cause Severe Loss of Macrozoobenthos in Alpine Streams".WATER RESOURCES RESEARCH 55.12(2019):10056-10081. |
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