flowing water in a weir in grevenbroich in germany

background blue blur clean cleaning closeup cold detail drink ecology ecosystem energy environment environmentalism erft exposure fall falls flow flux fresh funnel germany goutte grevenbroich industry lock locks low motion move nature open overflow plant power purity rain refreshment relaxation river rost set sewage slow sluice soft splash spray spring steel stream surface thirst treatment view water waterfall waterfalls wave weir weirs wevelinghoven winter