What is the disadvantage of drainage?
The main disadvantage of a drainage system can be the accelerated leaching out of nitrogen and other salts, causing eutrophysation or the increase of the salt content of streams and rivers. Usually, the disadvantages can be avoided by using proper irrigation methods and keeping the irrigation water standards
What do you mean by the term drainage?
The term drainage describes the river system of an area. small streams flowing from different directions come together to form the main river, which ultimately drains into a large water body such as a lake or a sea or an ocean. The area drained by a single river system is called a drainage basin.
What is the function of a drainage system?
What is the purpose of drainage system? The function of the field drainage system is to control the water table, whereas the function of the main drainage system is to collect, transport, and dispose of the water through an outfall or outlet.
What is the importance of drainage?
Drainage ensures that the soil is properly aerated. If you have excess or standing water it can choke your crops. Drainage reduces soil and nutrient loss from runoff and can help avoid soil erosion. Drainage on hill slopes helps to reduce the risk of soil slippage. Drainage can be collected and saved for future use during periods of dry weather.
What is drainage in geography?
The flow of water through well-defined channels is known as drainage and the network of such channels is known as drainage system. The drainage pattern of an area is the result of the geological time period, nature, and structure of rocks, topography, slope, etc.
What do you mean by drainage river?
The river system of an area is called drainage. The area drained by a single river system is called the drainage basin.
What is drainage example?
It is a tributary stream that is eroded along an underlying belt of non-resistant rock after the main drainage pattern has been established. For example – Chambal, Sind, Ken, Betwa, Tons, and Son are the subsequent drainage rivers and meet the Yamuna and the Ganga at right angles (the main drainage).
What is drainage system in simple words?
A drainage system can be defined as the pattern formed by the rivers, streams and lakes in a particular drainage basin. They are governed by the topography of the land, whether a particular region is governed by hard or soft rocks, and the slope of the land.
What are the 3 types of drainage?
The types of drainage systems will allow you a better comprehension of their roles and how they work together.Surface Drainage System. Surface drainage systems remove excess water from the land's surface through channels or ditches. ... Subsurface Drainage System. ... Slope Drainage System. ... Downspouts and Gutter Systems.
What are the four types of drainage?
These are dendritic, trellis, rectangular, and radial patterns.
What are the types of drainage?
The Four Types Of Drainage Systems For Your HomeSurface Drainage System.Subsurface Drainage System.Slope Drainage System.Downspout and Gutter Systems.Contact All Aspects Waterproofing For Your Drainage Needs!
What is relief and drainage in geography?
Relief affects the way water flows. On steep slopes water flows quickly, cutting downwards and creating steep sided V-shaped valleys. In areas with a gentle slope rivers flow slowly and meanders are common. There is more lateral erosion and valleys are wider.
What are the drainage features?
Natural drainage features include lakes, rivers, swamps, sea, rapids, water falls, cataracts, springs, deltas, fjords, sand or mud, and bays.
What is drainage and its importance?
Drainage ensures that the soil is properly aerated. If you have excess or standing water it can choke your crops. Drainage reduces soil and nutrient loss from runoff and can help avoid soil erosion. Drainage on hill slopes helps to reduce the risk of soil slippage.
What is the purpose of drainage?
One of the drainage system's functions is to collect surface water and/or ground water and direct it away, thereby keeping the ballast bed drained. The drainage system must also protect the substructure from erosion, from becoming sodden, and from losing its load-bearing capacity and stability.
What is natural drainage?
Natural drainage means a drainage consisting of native soils such as a natural swale or topographic depression which gathers or conveys run-off to a permanent or intermittent watercourse or waterbody.
What is drainage Class 9?
'Drainage' is a term that defines an area's river system. A drainage basin or river basin is an area that is drained by a single river system. A water division is considered an upland that divides two irrigation systems that are adjacent to each other. In this blog, we discuss drainage class 9 notes in detail.
What is called drainage basin?
drainage basin, also called catchment area, or (in North America) watershed, area from which all precipitation flows to a single stream or set of streams.
What is drainage system class 11?
The flow of water through well-defined channels is known as 'drainage' and the network of such channels is called a 'drainage system'. The drainage pattern of an area is the outcome of the geological time period, nature and structure of rocks, topography, slope, amount of water flowing and the periodicity of the flow.
What are the types of drainage?
The Four Types Of Drainage Systems For Your HomeSurface Drainage System.Subsurface Drainage System.Slope Drainage System.Downspout and Gutter Systems.Contact All Aspects Waterproofing For Your Drainage Needs!
What is drainage in geography?
The term drainage describes the river system of an area. Small streams flowing from different directions come together to form the main river, which ultimately drains into a large water body such as a lake or a sea or an ocean. CBSE Notes Class 9 Geography Chapter 3 on Drainage will help you to understand the drainage system in India.
What is the area drained by a single river system called?
The area drained by a single river system is called a drainage basin. Any elevated area, such as a mountain or an upland which separates two drainage basins is known as a water divide.
How long is the Ganga River?
The length of the Ganga is over 2500 km. Farakka in West Bengal is the northernmost point of the Ganga delta where the Ganga river divides into 2 parts.
Where is the Brahmaputra River located?
3) The Brahmaputra River System. The Brahmaputra rises in Tibet east of Mansarowar lake. It is slightly longer than the Indus. On reaching the Namcha Barwa (7757 m), it takes a ‘U’ turn and enters India in Arunachal Pradesh where it is called the Dihang.
How does the demand for water from rivers affect the quality of water?
Rivers are getting polluted as a heavy load of untreated sewage and industrial effluents are getting emptied into the rivers. Concern over rising river pollution led to the launching of various action plans to clean the rivers.
Which rivers are seasonal?
Peninsular rivers are seasonal. These rivers receive water from rain as well as from melted snow from high mountains. The flow of these rivers is dependent on rainfall. Two major Himalayan rivers, the Indus and the Brahmaputra originate from the north of the mountain ranges.
Which river flows southwards into the Bay of Bengal?
The mainstream flows southwards into Bangladesh and is joined by the Brahmaputra. Further downstream, it is known as the Meghna. The Meghna River flows into the Bay of Bengal and form Sundarban Delta.
What is surface drainage?
Surface drainage diverts excess water from the soil surface directly to streams, thereby reducing the amount of water that will move into and possibly through the soil. Subsurface drainage, provided by ditches and drainpipes, collects and diverts water from within the soil directly to streams. View chapter Purchase book.
Why is soil drainage important?
Soil drainage may determine which types of plants grow best in an area. Many agricultural soils need good drainage to improve or sustain production or to manage water supplies (Haroun, 2004 ). Poor drainage (causing water-logged areas) can often be identified by examining the soil color. In zones dominated by longer periods of saturation, and thereby reducing conditions, there can be mottles that occupy small areas and that differ in color from the soil matrix.
What is the DI of soil?
The DI is an ordinal index, ranging from 0 for the driest soils to 99 (open water) and is derived from the soil's taxonomic classification, which it assumes is a reflection of its long-term wetness. Although the DI has some degree of subjectivity, it has nonetheless proven to be highly useful for various types of landscape scale, soil wetness analysis and visualization. Particularly enlightening is the use of the DI in a geographic information system, where the DI values are shown in various colors, representing wetness, ranging from light orange (the driest soils) through yellow, green, blue, and finally purple (the wettest soils). Figure 11 illustrates the wetness of a sample landscape, using the DI color scheme outlined above.
What are the different classes of drainage in TA?
In TA sample points drainage could be divided into different classes, those that had a good drainage (TA10, TA11-Typic Hapludalfs, TA12-Typic Xerofluvent, TA13-Typic Haploxeralf, TA14-Typic Calcixerolls), and other points with a very poor drainage; TA01-Typic Halaquept, and in Aquic Xerofluvents at points TA02, TA03, TA04, and TA05. In TB, very poor drainage was observed in TB06 (Halic Haploxerert) and in Typic Haploxererts at TB07, TB08, and TB09. A well-drained soil was found in TB21 and TB22 (Typic Xerorthents).
How does natural drainage affect the environment?
The natural drainage of the soil may limit human use of the resource. Poor drainage has social and economic impacts. The drainage of the soil can be accelerated by the use of surface and subsurface drainage practices. Surface drainage diverts excess water from the soil surface directly to streams, thereby reducing the amount of water that will move into and possibly through the soil. Subsurface drainage, provided by ditches and drainpipes, collects and diverts water from within the soil directly to streams.
What is the process of water moving through the soil?
Soil drainage is a natural process by which water moves across, through, and out of the soil as a result of the force of gravity. Drainage is a component of the global hydrologic cycle; and streams and rivers are the naturally developed drainage conduits through which some of the water arrives at the land surface as precipitation is transported across the landscape and eventually to the oceans. This natural process also provides the water that supports seeps, springs, stream baseflow, and aquifer recharge. As water leaves the soil, air moves into the space previously occupied by the water; this process is called aeration. Adequate soil aeration is vital for maintaining healthy plant roots and the many beneficial organisms that live in the soil and require oxygen for respiration. As the proportion of water and air in the soil changes as a result of drainage, the ability of the soil to provide support and traction for animals and vehicles (trafficability) is altered as the strength of the soil changes with water content.
How does the proportion of water and air in the soil change as a result of drainage?
As the proportion of water and air in the soil changes as a result of drainage, the ability of the soil to provide support and traction for animals and vehicles (trafficability) is altered as the strength of the soil changes with water content. The natural drainage of the soil may limit human use of the resource.
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What is the difference between a divide and a drainage divide?
For this reason, the feature is often called a drainage divide. Water flowing on one side of a divide empties into one body of water, while water flowing on the other side empties into another.
What is a divide in geography?
Divides range in height from a slight rise in the land to the crest of a mountain range. A divide on the low-lying flood plain s of northern Belgium, for example, may rise no higher than a few meters. At the other extreme, the Andes—one of the longest mountain ranges in the world—form a divide in South America.
Where does the Yangtze River divide?
The Yangtze River forms a watershed south of the divide, emptying into the East China Sea. Although the Yellow and Yangtze Rivers never meet, they both flow into the Pacific Ocean. A major divide that separates smaller watersheds can be found in the West African country of Ghana.
Which river divides the Bohai Sea?
The watersheds of China’s Yellow and Yangtze Rivers form a major divide, for example. The Yellow River forms a watershed in China’s north. It empties into the Bohai Sea, part of the Pacific Ocean. The Yangtze River forms a watershed south of the divide, emptying into the East China Sea. Although the Yellow and Yangtze Rivers never meet, ...
What is the name of the mountain range that forms a divide?
A mountain range that forms a divide is called a dividing range. There are three major types of divides: continental divides, major divides, and minor divides.
Which river allows ships to travel from the Atlantic Ocean to the Great Lakes?
series of canals, locks, and channels, including the St. Lawrence River, that allows ships to travel from the Atlantic Ocean to the Great Lakes.
Is Missouri a river?
state of Missouri. However, the Missouri is a tributary of the Mississippi River.
Drainage Systems in India
- The Indian rivers are divided into two major groups: 1. The Himalayan rivers 2. The Peninsular rivers
The Himalayan Rivers
- The major Himalayan rivers are the Indus, the Ganga and the Brahmaputra. A river along with its tributaries may be called a river system.
The Peninsular Rivers
- The main water divide in Peninsular India is formed by the Western Ghats. Most of the major rivers of the Peninsula, such as the Mahanadi, the Godavari, the Krishna and the Kaveri flow eastwards and drain into the Bay of Bengal. These rivers make deltas at their mouths. The Narmada and the Tapi are the only long rivers, which flow west and make estuaries.
Lakes
- India has many lakes. These lakes differ from each other in size and other characteristics. 1. Most lakes are permanent 2. Some contain water only during the rainy season 3. Some lakes are the result of the action of glaciers and ice sheets 4. Some have been formed by wind, river action and human activities These lakes are attractive for tourists in places like Srinagar, Nainital. Different …
Role of Rivers in The Economy
- Rivers have been of fundamental importance throughout human history.
- Water from rivers is a basic natural resource, essential for various human activities.
- Rivers are used for irrigation, navigation, hydropower generation etc.
River Pollution
- The growing domestic, municipal, industrial and agricultural demand for water from rivers is affecting the quality of water. Rivers are getting polluted as a heavy load of untreated sewage and industrial effluents are getting emptied into the rivers. Concern over rising river pollution led to the launching of various action plans to clean the rivers. We hope CBSE Notes for Class 9 Social Sci…