Characteristics of the drainage basin the drainage basin. Drainage basins are open systems, with inputs, stores and outputs. A drainage basin an area of land drained by a river and its tributaries where any precipitation is collected or drained into it. These are the drainage system class 11 notes geography prepared by team of expert teachers. The drainage basin system 1 the drainage basin system. Figures and reference to a storm event should be used to support your answer.
Pdf drainage basin responses to climate change researchgate. Pdf relationship between drainage basin area and stream. Drainage basin hydrological system a level geography. A watershed is an area of land that drains all the streams and rainfall to a. Its input is precipitation in the form of rain or snow and its outputs can be seen as evapotranspiration and the river flow itself. You should be able to explain why once you have seen the following slides. This is the total volume of water flowing through a channel at any given point and is measured in cubic metres per second cumecs. With a partner, list as many rivers as you can in 60 seconds. Some water is released via a small outlet from the lake and some can be evaporated into the atmosphere. When it comes to sustainable drainage design, microdrainage does the heavy lifting so you dont have to.
Chapter i the drainage basin as a system unit sciencedirect. It sizes drainage networks and includes flow controls, infiltration systems and. The drainage basin system is demarked by a watershed, this is the upper limit. Outputs include channel runoff, evapotranspiration and groundwater flow. A major component of the water cycle is the drainage basin system. A drainage basin is the area of land that it drained by a river and its tributaries. Discharge river discharge river discharge is the volume of water flowing through a river channel. A drainage basin is any area of land where precipitation collects and drains off into a common. Advanced drainage design software that optimises the performance and effectiveness of drainage systems, including suds both greenfield and retrofit. Explain the main hydrological characteristics and processes which operate within rivers and drainage basins. The index of the cell of the adjacent drainage basin in the lowest passage is stored in the sill array.
To analyse the functioning of a drainage basin as an open system with inputs, outputs, transfers, stores and feedback loops. River basin processes drainage basin river free 30. A drainage system is described as accordant if its pattern correlates to the structure and relief of the landscape over which it flows. The drainage basin hydrological system is a local open system. The drainage basin is considered as a geomorphic unit. Hydrological processes within a river basin drainage basin. This drainage basin system divided connecticut into 8 major basins, 45 regional basins, 337 subregional basins, 2,898 local basins, and 7,067 small drainage basin. Careful consideration of the ways processes interact to result in a high or low probability of flooding is vital.
This drainage basin system divided connecticut into 8 major basins, 45 regional basins, 337. There are many interrelationships within this system. Channels in alluvial plains glossary bibliography biographical sketch to cite this chapter summary channel. Transfers are processes by which water flows or moves through the system, eg. The drainage basin system the drainage basin bbc bitesize. A standardized mapping of natural drainage basins in connecticut was completed in 1981 by the. A standardized mapping of natural drainage basins in connecticut was completed in 1981 by the connecticut department of environmental protection dep. Students read about and trace drainage basins in europe. The hydrological cycle and drainage basin systems youtube. A survey on the surface water drainage system in west bengal and the pollution.
A drainage basin covered in dense vegetation will experience high rates of interception, root uptake and evapotranspiration this will reduce the amount of discharge within the basin. If you have a textbook on the drainage basin then this can be used to encourage reading and research however, the lesson can be taught without one. There is an imaginary line separating drainage basins called a watershed. A drainage basin is known as open system because water can be added and lost too inputs when water is added to the system processes when water is moving in the system stores when water is stationary in the system outputs when water leaves a system task 2 complete the activity at the bottom. Students are expected to complete their assignment on drainage basin analysis during the following week, working from the maps provided. The drainage basin acts as an open system, with a number of inputs, outputs, stores and transfers. Drainage basin the features of a drainage basin gcse geography in this video, we look at drainage basins taking a look specifically at the river rhine. Channel processes, river morphology, drainage basin, river system, stream order, hortons laws, alluvial plain, channel pattern, sediment load, rejuvenation. Write a short paragraph describing two different ways that water passes through the drainage basin system. Drainage basins in europe national geographic society. A drainage basin provides a limited unit of the earths surface within. The basin may terminate in a lake that has no outlet in some arid regions, the ocean, or. Through interactive discussion, we explore regional landscape and the geomorphic form, function, and processes of a drainage basin system.
Ppt the drainage basin system powerpoint presentation. Download revision notes for drainage system class 11 notes geography and score high in exams. Drainage basin the features of a drainage basin gcse. This is a series of processes by which water is evaporated from the sea and. Tropical rainforests are thought to intercept up to 80% of rainfall, whereas arable land intercepts less than 10% of rainfall. When a droplet of water falls onto the land as precipitation, gravity will make sure that the water is. The hydrological cycle we define it as a closed system because it goes round and round and nothing can be added and nothing can be taken away. The drainage basin system within the system are stores and transfers flows stores are places where water is held, eg. The main input is precipitation which is regulated by various means of storage.
This work had been conducted under the guidance of dr a. The drainage basin of a river forms an integral part of the entire hydrological cycle. A drainage basin provides a limited surface area within which physical processes pertinent to the general hydrology may be considered. If students have difficulty, you may choose to demonstrate the process of delineating a drainage basin on. A drainage basin system is a part of the worlds hydrological water cycle. Drainage patterns depend on the topography and geology of the land accordant drainage patterns. It also has several more words added, and a couple more ideas besides. A drainage basin is an area of land drained by a river and its tributaries river system. This is a short video to be used as either an instructional video or revision tool. Its boundary is marked by a ridge of high land called watershed drainage basins have one main stream and many tributaries.
781 1116 909 1387 491 1187 670 556 602 1283 569 1198 674 1328 81 1445 149 119 1015 954 74 690 75 935 504 597 325 1146 652 1238 479