What happens when a streams discharge increases?
When stream discharge increases, more water is flowing through a corridor. To accommodate that, the water will rise in the channel. Depending on the geometry of the channel, the width of wetted water surface may increase as the water fills a different geometry. If the width of the cross-sectional geometry is constant, however, only depth will increase, along with velocity.
Thermal pollution (hot water) can cause several environmental impacts. These include: Reduced oxygen levels in the water changing the populations of the aquatic creatures present. Changes in benthic plant species. Changes in the viability of reproductive success in fish. Faster decomposition of organic material. Increased reactivity of toxins in the water. Changes in the migratory behaviour of ducks and similar birds