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What is a wetland catchment?
Reservoirs which collect the rainwater that falls in the catchment areas.
What are catchment areas?
to catch something
What is draniage basin?
Geomorphologists and hydrologists often view streams as being part of drainage basins. A drainage basin is the topographic region from which a stream receives runoff, throughflow, and groundwater flow. Drainage basins are divided from each other by topographic barriers called a watershed (Figure 10aa-1). A watershed represents all of the stream tributaries that flow to some location along the stream channel. The number, size, and shape of the drainage basins found in an area varies with the scale of examination. Drainage basins are arbitrarily defined based on the topographic information available on a map. The quality of this information decreases as map scale becomes smaller (see topic 2a). Figure 10aa-1: The following image shows the nested nature of drainage basins as determined from a topographic map sheet. The red lines describe the watersheds for the drainage basins of first order streams. The yellow lines define the watersheds for two drainage basins from locations further upstream. Note that the first order basins are components of these much large drainage basins. Drainage basins are commonly viewed by scientists as being open systems. Inputs to these systems include precipitation, snow melt, and sediment. Drainage basins lose water and sediment through evaporation, deposition, and streamflow. A number of factors influence input, output, and transport of sediment and water in a drainage basin. Such factors include topography, soil type, bedrock type, climate, and vegetation cover. These factors also influence the nature of the pattern of stream channels (Figure 10aa-2). Figure 10aa-2: Common drainage pattern types.Trellised drainage patterns tend to develop where there is strong structural control upon streams because of geology. In such situations, channels align themselves parallel to structures in the bedrock with minor tributaries coming in at right angles. Areas with tectonic faults or bedrock joints can cause streams to take on a grid-like or rectangularpattern. Parallel drainage patterns are often found in areas with steep relief or where flow is over non-cohesive materials. Dendritic patterns are typical of adjusted systems on erodable sediments and uniformly dipping bedrock. Deranged drainage patterns are found in areas recently disturbed by events like glacial activity or volcanic deposition. Over time, the stream will adjust the topography of such regions by transporting sediment to improve flow and channel pattern.
What is the total area drained by a stream and its tributaries called?
Basin Or Watershed
What activities would a government allow in water catchment areas?
Every area is a water catchment area to a greater or lesser extent.
What catchment is Brisbane in?
Brisbane is located in more than one catchment, and within Brisbane are several catchment areas. Most of the Brisbane River is in the Brisbane Valley catchment. Refer to the related link below for more detail of the various catchments.
Type of drainage in volcanic areas?
radial drainage
What is the difference between catchment area and river basin?
River basin:River basin is the portion of land drained by a river and its tributaries. It encompasses all of the land surface dissected and drained by many streams and creeks that flow downhill into one another, and eventually into one river. The final destination is an estuary or an ocean. As a bathtub catches all the water that falls within its sides, a river basin sends all the water falling on the surrounding land into a central river and out to the seaThe river catchmentThe river catchment, or drainage basin, is all the land from the mountain to to the seashore, drained by a single river and its tributaries.Catchment areas vary greatly in size - a big river may have a catchment area of several thousand square kilometres, whereas a smaller tributary will have a catchment area of only a few hectares.Catchments are separated from each other by watersheds. The characteristics of any river (physical, chemical, biological) are determined by the nature of the catchment and the activities , both human and natural, that take place in it.
How can land use changes have an effect on drainage basin system?
The trees in the drainage basin area would intercept and delay the discharge of the drainage basin but since there are no trees around, the water will just flow very fast, which can cause surface run offs.
How much of Singapore's water needs are met by catchment areas?
about 1/2
What is a watershed and how is it involved in the water cycle?
A River.additional. strictly speaking, a watershed is the series of ridgelines separating different catchment areas. Often watershed is used when catchment should be.
How many water catchments are there in Singapore?
The total number of water catchment areas in Singapore are 17.
