this application is screensaver of moving water live wallpaper
as water flows in channels, the streambed and banks of the channel will resist the flow of water. the velocity of the water is dependant on steepness of the slope, type of rock or soil, amount of vegetation, shape of stream bed, and obstructions. surface water provides the liquid where most evaporation takes place. groundwater refers to water that has penetrated the soil or bedrock and moves through rocks that have a high pore space. the water comes from infiltration of surface waters including lakes, rivers, recharge ponds, and even waste-water treatment systems. moving water background. groundwater is also affected by the force of gravity. however, because of some of the properties of water, it can pool in higher area and actually defy gravity in some cases. the water stable is the upper level of the saturated zone of groundwater.
rivers, streams and creeks are a surface water system with a network of channels that collect and move runoff. runoff is excess water that is not adsorbed by the surrounding area. runoff can be created by rainfall, melting snow, or groundwater discharge. moving water background. the shape of the river system will depend on the topography, the type of rock or soil it is traveling through, and the style of its biological diversity. for instance, pine trees require a lot of water to grow. runoff in a pine tree forest would be less than if the area was populated by oak trees. oak trees require less water than pine, so more water would be available as runoff. rivers and streams change depending on the amount of water that flows throughout the year. moving water background. this relies on a continuous source of water is from the surface or subsurface. a perennial flow is a channel that has water all year round. an example would be the great rivers of the world including the ganges river (india), amazon river (south america), or the nile river (africa). an intermittent stream would be a flow that is more than 50% during the year. an ephemeral flow generally refers to a stream or creek that only has water part of the year. this is usually in areas, like deserts, that are dry most of the year, but do have maybe too months of rain.