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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Impact of hydroelectric power releases on the morphology and sedimentology of the bed of the Warche River (Belgium)
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Impact of hydroelectric power releases on the morphology and sedimentology of the bed of the Warche River (Belgium)

机译：水力发电释放对沃什河（比利时）河床形态和沉积学的影响

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摘要

The Butgenbach dam on the Warche River was built in 1932 in order to maintain a sufficient supply of water to the Robertville reservoir situated 7 km downstream, for the production of hydroelectricity. During winter months, releases are made almost every day from the Butgenbach dam. From a hydrological point of view, this has resulted in significantly reducing the number of discharges that are higher than bankfull. Despite the reduction in peak discharge, there is a significant increase in the number of efficient discharges (0·6 bankfull). The impacts of these hydrological modifications on the bed morphology and sedimentology below the Butgenbach dam have been studied and the following geomorphological modifications have been identified: a doubling of the width of the channel in 45 years, a reduction in the number of riffles and pools, an increase in the number of gravel bars and islets and an increase in bedrock outcrops in the channel. Moreover, the finest bed particles are mobilized by the almost daily releases, inducing a significant increase in bed-material size sorting. The reduction of sinuosity and the disappearance of bed differentiation and riffle/pool sequences have produced a diminution of bed roughness and an increase of the competence of the river. Thus relatively small floods can remove the armoured layer.
机译：Warche河上的Butgenbach大坝建于1932年，目的是为位于下游7公里处的Robertville水库保持足够的水供应，以生产水力发电。在冬季，Butgenbach大坝几乎每天都有排放。从水文观点来看，这已导致大大减少了超出堤岸的流量。尽管峰值排放量减少了，但有效排放量却大大增加了（0·6 bankfull）。研究了这些水文改造对Butgenbach大坝下的河床形态和沉积学的影响，并确定了以下地貌改造：在45年内河道宽度增加了一倍，浅滩和水池数量减少，河道中砾石和小岛的数量增加，基岩露头增加。此外，几乎每天都会释放出最细的床颗粒，从而导致床料尺寸分选显着增加。弯曲度的降低以及河床分化和浅滩/池序的消失已导致河床粗糙度的减小和河流能力的提高。因此，相对较小的洪水可以去除装甲层。

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