This document discusses soil erosion and methods for controlling it to maintain soil health. It defines soil erosion as the detachment, transport, and deposition of soil particles. Soil erosion reduces soil quality and agricultural productivity on-site, and causes siltation of waterways off-site. Factors that influence erosion include climate, soil type, topography, and human activities. The document then outlines various agronomic and engineering measures that can be taken to control erosion, such as using vegetation, contour farming, strip cropping, mulching, terracing, and building structures like check dams and ponds. The overall goal is to implement practices that protect the soil surface and slow runoff to prevent erosion.
Soil water conservation methods in agricultureVaishali Sharma
This presentation includes introduction as well as all the methods in agriculture either engineering or agronomic measures used in conservation of soil and water against erosion or other deteriorative factors.
Soil water movement
Soil water movement
Soil water movement
Soil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movement
describes the irrigation and irrigation requirements of different crops. this ppt also describes about different methods to measure the soil moisture availability.
For More Visit - www.civilengineeringadda.com
Irrigation Efficiency
Water conveyance Efficiency
It takes into account, conveyance or transit losses such as seepage through canal and evaporation through it.
η_c=W_f/W_r ×100
Where, Wf = water delivered to the field
Wr = water delivered from river or stream
Water Application Efficiency
It is the ratio of water stored in root zone to the water delivered to the field.
η_a=W_s/W_f ×100
Where, WS = water weight stored in root zone
WS = Wf – deep percolation – runoff
Wf = water delivered to the field
This efficiency is also called as farm efficiency and it depends on the irrigation technique that has been adopted.
Water use efficiency
It is the ratio of water used beneficially or consumptively to the water delivered to the field.
η_u=W_u/W_f ×100
Where, Wf = water delivered to the field
WU = consumptively used water
Water Storage Efficiency
This is the ratio of actual water stored in the root zone to the water needed to be stored to bring the moisture content upto field capacity.
Water Distribution efficiency
This evaluate the degree to which water is uniformly distributed to the root zone throughout the field area.
η_d=(1-y/d)×100
Where, d = average depth
y = Average numerical deviation in the depth of water stored from the average depth stored during irrigation
Question – the depths of penetration along the length of a border strip at points 30 m apart were proved. There observed values are 2 m, 1.9 m, 1.8 m, 1.6 m and 1.5 m. Compute the water distribution efficiency.
Solution –
Water distribution efficiency,
η_d=(1-y/d)×100
Where, d = average depth
d = (2+1.9+1.8+1.6+1.5)/5=1.76
And y = average numerical deviation
y = 1/5((2-1.76)+(1.9-1.76)+(1.8-1.76)+(1.76-1.6)+(1.76-1.5)=0.168
Therefore,
η_d=(1-0.168/1.76)×100
η_d=90.45%
Consumptive Use Efficiency
It is the ratio of water used consumptively to the net amount of water from the root zone.
Soil water conservation methods in agricultureVaishali Sharma
This presentation includes introduction as well as all the methods in agriculture either engineering or agronomic measures used in conservation of soil and water against erosion or other deteriorative factors.
Soil water movement
Soil water movement
Soil water movement
Soil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movementSoil water movement
describes the irrigation and irrigation requirements of different crops. this ppt also describes about different methods to measure the soil moisture availability.
For More Visit - www.civilengineeringadda.com
Irrigation Efficiency
Water conveyance Efficiency
It takes into account, conveyance or transit losses such as seepage through canal and evaporation through it.
η_c=W_f/W_r ×100
Where, Wf = water delivered to the field
Wr = water delivered from river or stream
Water Application Efficiency
It is the ratio of water stored in root zone to the water delivered to the field.
η_a=W_s/W_f ×100
Where, WS = water weight stored in root zone
WS = Wf – deep percolation – runoff
Wf = water delivered to the field
This efficiency is also called as farm efficiency and it depends on the irrigation technique that has been adopted.
Water use efficiency
It is the ratio of water used beneficially or consumptively to the water delivered to the field.
η_u=W_u/W_f ×100
Where, Wf = water delivered to the field
WU = consumptively used water
Water Storage Efficiency
This is the ratio of actual water stored in the root zone to the water needed to be stored to bring the moisture content upto field capacity.
Water Distribution efficiency
This evaluate the degree to which water is uniformly distributed to the root zone throughout the field area.
η_d=(1-y/d)×100
Where, d = average depth
y = Average numerical deviation in the depth of water stored from the average depth stored during irrigation
Question – the depths of penetration along the length of a border strip at points 30 m apart were proved. There observed values are 2 m, 1.9 m, 1.8 m, 1.6 m and 1.5 m. Compute the water distribution efficiency.
Solution –
Water distribution efficiency,
η_d=(1-y/d)×100
Where, d = average depth
d = (2+1.9+1.8+1.6+1.5)/5=1.76
And y = average numerical deviation
y = 1/5((2-1.76)+(1.9-1.76)+(1.8-1.76)+(1.76-1.6)+(1.76-1.5)=0.168
Therefore,
η_d=(1-0.168/1.76)×100
η_d=90.45%
Consumptive Use Efficiency
It is the ratio of water used consumptively to the net amount of water from the root zone.
IN this presentation cover Erosivity and erodibilty
Different methods to calculate soil loss.
Er. Gurpreet Singh
M.tech from PAU, Ludhiana
Assistant Prof.
Khalsa college.
Topics:
1, Introduction to Irrigation
2. Methods of Irrigation
3. Indian Agricultural Soils
4. Methods of Improving Soil Fertility & Crop Rotation
5. Soil-Water-Plant Relationship
6. Duty and Delta
7. Depth and Frequency of Irrigation
8. Irrigation Efficiency and Water Logging
Conservation tillage, Practices used in Conservation Tillagescience book
This is presentation on topic of Conservation Tillage, it gives You information about conservation tillage, types of conservation tillage, Practices used in conservation tillage. It enhanced Your knowledge about conservation tillage.
Soil and water conservation engineering, water erosion, types of water erosion, splash erosion, sheet erosion, rill erosion, gully erosion, stream bank erosion, coastal erosion
Soils can process and hold considerable amount of water. They can take in water, and will keep doing so until they are full, or until the rate at which they can transmit water into and through the pores is exceeded. Some of this water will steadily drain through the soil (via gravity) and end up in the waterways and streams, but much of it will be retained, despite the influence of gravity. Much of this retained water can be used by plants and other organisms, thus contributing to land productivity and soil health.
IN this presentation cover Erosivity and erodibilty
Different methods to calculate soil loss.
Er. Gurpreet Singh
M.tech from PAU, Ludhiana
Assistant Prof.
Khalsa college.
Topics:
1, Introduction to Irrigation
2. Methods of Irrigation
3. Indian Agricultural Soils
4. Methods of Improving Soil Fertility & Crop Rotation
5. Soil-Water-Plant Relationship
6. Duty and Delta
7. Depth and Frequency of Irrigation
8. Irrigation Efficiency and Water Logging
Conservation tillage, Practices used in Conservation Tillagescience book
This is presentation on topic of Conservation Tillage, it gives You information about conservation tillage, types of conservation tillage, Practices used in conservation tillage. It enhanced Your knowledge about conservation tillage.
Soil and water conservation engineering, water erosion, types of water erosion, splash erosion, sheet erosion, rill erosion, gully erosion, stream bank erosion, coastal erosion
Soils can process and hold considerable amount of water. They can take in water, and will keep doing so until they are full, or until the rate at which they can transmit water into and through the pores is exceeded. Some of this water will steadily drain through the soil (via gravity) and end up in the waterways and streams, but much of it will be retained, despite the influence of gravity. Much of this retained water can be used by plants and other organisms, thus contributing to land productivity and soil health.
soil erosion is the one of the severe problem now a days. we should know about types of soil erosion , its effect on environment and how it to be prevented by various method..in these slides gives brief idea about types and erosion of soil erosion.
Water and wind erosion are natural processes that can cause the loss and movement of soil and sediment. Here's a brief description of each:
Water erosion: Water erosion occurs when rainfall or runoff flows over the land, picking up and carrying away soil particles. The intensity and duration of rainfall, the slope of the land, and the presence or absence of vegetation all contribute to the severity of water erosion. It can lead to the formation of gullies, rills, and streambank erosion, as well as the loss of fertile topsoil. Water erosion can have detrimental effects on agricultural lands, causing decreased soil fertility, reduced crop productivity, and sedimentation in water bodies.
Wind erosion: Wind erosion occurs when strong winds blow over bare or poorly protected soil surfaces, lifting and transporting soil particles. It typically affects areas with dry or arid climates and exposed soils lacking vegetation cover. Wind erosion can result in the formation of sand dunes, the removal of topsoil, and the deposition of sediment in unwanted areas. It can have significant consequences for agricultural productivity, damaging crops, reducing soil fertility, and causing desertification in severe cases.
Both water and wind erosion can be exacerbated by human activities such as deforestation, improper land management practices, overgrazing, and construction without adequate soil conservation measures. Effective erosion control measures include the implementation of erosion control structures, contour plowing, terracing, planting windbreaks or shelterbelts, establishing cover crops, and implementing proper water management techniques to minimize runoff.
PRINCIPLES OF EROSION: Types of erosion, factors affecting erosion, effects of erosion on land fertility and land capability, estimation of soil loss due to erosion, Universal soil loss equation.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
How to Split Bills in the Odoo 17 POS ModuleCeline George
Bills have a main role in point of sale procedure. It will help to track sales, handling payments and giving receipts to customers. Bill splitting also has an important role in POS. For example, If some friends come together for dinner and if they want to divide the bill then it is possible by POS bill splitting. This slide will show how to split bills in odoo 17 POS.
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
For more information, visit-www.vavaclasses.com
3. INTRODUCTION TO SOIL EROSION
Definition :
Soil erosion is the detachment, transport & deposition of soil particle on land
surface - termed as loss of soil.
Measured as mass /unit area - tonne/ha or Kg/sq.m
Soil loss is of interest primarily On-site effect of erosion such as loss of crop
productivity.
Off site effect of erosion are siltation in ditches, streams , reservoirs.
Sediment generated by erosion processes are prime carrier of agricultural
chemicals that pollutes stream or lakes.
4. SOIL EROSION PROBLEM
Soil is the most precious gift of nature –Prime resource -for food,
fodder etc. -Soil mismanaged = less productivity.
In India, more than 100 million hectares -soil degraded.
Ab ou t 17 tones/ha soil detached annually->20% of this is transported
by river to sea -10% deposited in reservoir results 1 to 2% loss off
storage capacity.
Soil erosion deteriorates soil quality & reduces productivity of natural,
agricultural & forest ecosystem.
Soil erosion deteriorates quality of water.
Increased sedimentation causes reduction of carrying capacity of
water bodies.
11. MECHANISM OF EROSION
Begins with raindrops striking bare soil dislodging particles.
Intense rains seal surface.
W H E N r a i n f a l l exceeds infiltration water is stored in small depressions.
O N C E depressions are filled, runoff begins.
INITIALLY water flows in a discontinuous sheet.
Eventually it concentrates into small channels or rills.
T h e runoff now has energy to break off particles and cut deeper.
T h e amount of erosion caused by sheet and rill erosion increases with
slope and distance.
Rills may eventually form gullies.
12. SOIL EROSION PARAMETERS
S o i l erosion – function of:
Erosivity – ability to erode : depends on rainfall.
Erodibility – Resistance offered to restrict erosion
(property of soil)
Topography – property of land.
Management – contributed by man.
Erodibility: Detachability & transportability.
Topography: Slope, length, relation to other land
Management: Land use & crop management.
13. TYPES OF SOIL EROSION
Geological erosion, Natural erosion & Erosion from activities of
human & animals.
Geological erosion: -Soil forming anddistribution-Long time process
H u m a n and animal: Tillage, removal of plants and Tillage, removal
of plants and other vegetation- accelerated erosion
Stream bank erosion
Landslide, Volcanic eruption, flooding
W a t e r and wind: major factors of soil erosion
15. SURFACE EROSION BY WATER
• It is caused by the action of
rain water , which removes the
soil byfallingasrain dropsas well
as by its surface slope action.
17. WATER EROSION
SPLASH EROSION
1. This type of soil erosion occurs when the falling drops splash on
the soil.
SHEET EROSION
1. Thesoil is removed in small but uniform amounts from all over and
therefore, does not leave a mark behind.
21. RILL EROSION
1. Therun off water moves rapidly & cuts small stream like structure
GULLY EROSION
1. Several rills converge towards the steep slopes & join to form board channels of
water called gullies.
STREAM BANK EROSION
1. The rivers during floods splash their water against the banks &
through them.
24. Streambank
Erosion
When a stream is straightened or widened,
streambank erosion increases. Accelerated
streambank erosion occurs until the stream
reestablishes a stable size and pattern.
When land use changes occur in a
watershed, such as clearing of land for
agriculture or development, runoff
increases. With this increase in runoff the
stream channel will adjust to accommodate
the additional flow, increasing streambank
erosion.
25.
26.
27. PRINCIPLE OF SOIL & MOISTURE CONSERVATION
• Ridge to valley treatment.
• Maximum possible rain water should be conserved where it falls.
• Adequate vegetal cover during rainy season.
• Storage/ disposal of excess water with safe velocity.
• Checks/ barriers along the contour to control soil erosion &
ground water recharge.
• Integration of biological and mechanical measures.
33. EROSION CONTROL
Erosion control is the practice of preventing or controlling wind or water
erosion in agricultural land development, river banks ,coastal areas, and
construction
Thethreemainprinciples:
Use land according to itscapability.
Protectthesoilsurfacewith some form of cover.
Controlrunoff before it develops by an erosiveforce.
34. 1. VEGETATION
Thesimplest and most natural wayto prevent erosion.
Plants establish root systems,which stabilizessoil and prevents soilerosion.
35.
36. SOILSTABILIZATION:
THEPLANT ROOT SYSTEMBINDTHESOILAT THE SURFACE.
INCREASE STRENGTH OF THE SOIL.
SOIL EROSION BY RUNOFF WATER AND WIND IS DECREASED.
Water managementmechanisms:
The root system abstract water from the soil which decreases erosion bywater
38. 2. CONTOUR FARMING
Contour farming or Contour plowing or Contour bunding
is the farming practice of level rows around a hill, as
opposed to farming up and down onthe hill.
41. It reduces :-
1)Amount and
2) Velocity of water moving acrossthesoil surface
or hill surface
The water break allows more time for moving the water by
infiltration into the soil.
Can reduce soil erosion by as much as 50% as compared to
uphill/downhill farming.
44. 3.RETAINING WALLS
A. A retaining wall is a structure that keeps soil, rock and water in
place so that it won’t be washed away from the rain.
B. The retaining wall serves the purpose of preventing erosion of soil by
wind, rain and flowing water, that is most likely to be due to the
wind and the rain.
46. 4. WIND BREAKS
Field windbreaks are linear planting of trees/plant
designed to reduce wind speed in open fields, preventing soil
erosion and protecting crops from wind damage.
Field wind breaks are typically planted in multiple rows
perpendicular to prevailingwinds.
47.
48. MULCHING
In mulching, a material is placed on the soil surface to
maintain moisture, reduce weed growth, reduce soil
erosion and improve soilconditions.
Mulching can help to improve crop yield and optimise
water use&reducesoiland watererosion.