Search results
Results from the WOW.Com Content Network
Drainage density relates to the storage and runoff terms. Drainage density relates to the efficiency by which water is carried over the landscape. Water is carried through channels much faster than over hillslopes, as saturated overland flow is slower due to being thinned out and obstructed by vegetation or pores in the ground. [7]
The maximum rate at that water can enter soil in a given condition is the infiltration capacity. If the arrival of the water at the soil surface is less than the infiltration capacity, it is sometimes analyzed using hydrology transport models , mathematical models that consider infiltration, runoff, and channel flow to predict river flow rates ...
Human factors such as urbanization rates, land use trends, and chosen building materials for impervious surfaces often exacerbate these issues. The implementation of citywide maintenance strategies such as street sweeping programs can also be an effective method in improving the quality of urban runoff.
The notions of time, uplift, slope and drainage density evolution in the erosion cycle have been criticized. [21] Further the validity of some whole concepts associated with the cycle of erosion have been questioned including stream grade, [21] slope decline, [D] base level [21] and most of all that of peneplains. [21] [E]
Factors determining the extent or size of a zone can include hydraulics, telemetry systems, history, and population density. Sometimes systems are designed for a specific area then are modified to accommodate development. Terrain affects hydraulics and some forms of telemetry.
The effect is substantial when the density ratio is large (e.g., in the natural debris flow). If the flow is neutrally buoyant, i.e., =, (see, e.g., Bagnold, [14] 1954) the debris mass is fluidized and moves longer travel distances. This can happen in highly viscous natural debris flows. [15]
Drainage basin of the Ohio River, part of the Mississippi River drainage basin. In hydrology, the drainage basin is a logical unit of focus [clarification needed] for studying the movement of water within the hydrological cycle. The process of finding a drainage boundary is referred to as watershed delineation. Finding the area and extent of a ...
Any activities that enlarge the impermeable surface areas in a city can increase the flood risk. Impermeable surface areas are generated through soil sealing as this reduces drainage options of floodwaters. [3]: 925 As the pace of urbanization accelerates around the world, urban flooding has the potential to affect more people. [3]: 925