This document discusses sprinkler irrigation systems. It defines sprinkler irrigation as a method of applying irrigation water similar to natural rainfall by pumping water under pressure through a system of pipes and spraying it into the air above crops. The document describes different types of sprinklers like impact, gun, pop-up, gear-driven, rotor, and turbo sprinklers. It also discusses the advantages of uniform water distribution and flexibility and disadvantages like high costs and sensitivity to wind.
Conjunctive use of water and water budgetingDelince Samuel
Conjunctive use of water involves using multiple water sources like groundwater and surface water together to provide sustained irrigation that meets crop demands. It allows for greater water supply security and yield by taking advantage of natural groundwater storage and the ability to rapidly deploy groundwater when other sources are limited. This helps ensure better timing of irrigation, reduces environmental impacts, prevents water scarcity in remote regions, creates equal water distribution, and meets crop demands in a reliable way.
1) The document discusses evapotranspiration (ET), which is the combination of evaporation from soil and transpiration from plants. It also discusses consumptive use (CU), which is the total water used by plants for ET and metabolic activities.
2) ET can be potential, reference, or actual, depending on vegetation and water availability. It is affected by environmental, plant, geographical, and soil factors. CU depends on climate, crop type, soil properties, and management practices.
3) Both ET and CU are important concepts in irrigation and water resource management. Measuring ET and CU helps determine crop water requirements and design efficient irrigation systems.
This document outlines groundwater management strategies for municipal officials. It notes that while the region receives abundant precipitation, local overuse and water quality problems are still possible if left unmanaged. It then describes a model groundwater protection ordinance that has been adopted by several Dutchess County towns. The ordinance establishes development standards and best practices to safeguard both groundwater quantity and quality. These include regulating certain land uses, prohibiting new underground fuel tanks, guidance for cluster subdivisions, and more rigorous pumping test requirements. The model aims to preserve aquifer and stream flows while also addressing issues like pharmaceutical contamination and climate change impacts. Towns can adopt this law or planning boards can apply its guidance under the State Environmental Quality Review Act.
This document contains the syllabus for the course CE8603 - Irrigation Engineering taught by A.Leema Margret, Assistant Professor at Ramco Institute of Technology, Rajapalayam. The syllabus is divided into 5 units that cover topics like crop water requirement, irrigation methods, diversion and impounding structures, canal irrigation, and water management in irrigation. Key terms discussed in Unit 1 include duty of water, delta, base period, evapotranspiration, and factors affecting duty of water. Surface irrigation methods like flow irrigation and sub-surface irrigation are also introduced.
This document outlines an innovative watershed approach to reducing nutrient losses from agricultural landscapes. The key points are:
1) Past conservation efforts have successfully reduced soil erosion but more is needed to reduce nutrients like nitrogen and phosphorus. The scale of the problem requires solutions at the watershed scale rather than just the farm scale.
2) By understanding how landscapes have changed and nutrient flowpaths, critical source areas and sink areas can be identified. Restoring sinks on just 1-2% of the landscape can decrease downstream loads by 45%.
3) The watershed approach follows nutrient flowpaths and prioritizes practices to reduce sources, transport, and restore sinks. These may include improved fertilizer management, cover crops
This document provides an overview of various topics related to irrigation, including different irrigation methods like drip, sprinkler and border strip irrigation. It discusses design aspects and components of these systems as well as their operation and maintenance. Other topics covered include irrigation scheduling, efficiency and water quality issues. It also touches on water management challenges like waterlogging and the role of community participation and water user organizations. The document outlines the term work which involves a presentation, assignments and exam on the introductory chapters.
This document discusses sprinkler irrigation systems. It defines sprinkler irrigation as a method of applying irrigation water similar to natural rainfall by pumping water under pressure through a system of pipes and spraying it into the air above crops. The document describes different types of sprinklers like impact, gun, pop-up, gear-driven, rotor, and turbo sprinklers. It also discusses the advantages of uniform water distribution and flexibility and disadvantages like high costs and sensitivity to wind.
Conjunctive use of water and water budgetingDelince Samuel
Conjunctive use of water involves using multiple water sources like groundwater and surface water together to provide sustained irrigation that meets crop demands. It allows for greater water supply security and yield by taking advantage of natural groundwater storage and the ability to rapidly deploy groundwater when other sources are limited. This helps ensure better timing of irrigation, reduces environmental impacts, prevents water scarcity in remote regions, creates equal water distribution, and meets crop demands in a reliable way.
1) The document discusses evapotranspiration (ET), which is the combination of evaporation from soil and transpiration from plants. It also discusses consumptive use (CU), which is the total water used by plants for ET and metabolic activities.
2) ET can be potential, reference, or actual, depending on vegetation and water availability. It is affected by environmental, plant, geographical, and soil factors. CU depends on climate, crop type, soil properties, and management practices.
3) Both ET and CU are important concepts in irrigation and water resource management. Measuring ET and CU helps determine crop water requirements and design efficient irrigation systems.
This document outlines groundwater management strategies for municipal officials. It notes that while the region receives abundant precipitation, local overuse and water quality problems are still possible if left unmanaged. It then describes a model groundwater protection ordinance that has been adopted by several Dutchess County towns. The ordinance establishes development standards and best practices to safeguard both groundwater quantity and quality. These include regulating certain land uses, prohibiting new underground fuel tanks, guidance for cluster subdivisions, and more rigorous pumping test requirements. The model aims to preserve aquifer and stream flows while also addressing issues like pharmaceutical contamination and climate change impacts. Towns can adopt this law or planning boards can apply its guidance under the State Environmental Quality Review Act.
This document contains the syllabus for the course CE8603 - Irrigation Engineering taught by A.Leema Margret, Assistant Professor at Ramco Institute of Technology, Rajapalayam. The syllabus is divided into 5 units that cover topics like crop water requirement, irrigation methods, diversion and impounding structures, canal irrigation, and water management in irrigation. Key terms discussed in Unit 1 include duty of water, delta, base period, evapotranspiration, and factors affecting duty of water. Surface irrigation methods like flow irrigation and sub-surface irrigation are also introduced.
This document outlines an innovative watershed approach to reducing nutrient losses from agricultural landscapes. The key points are:
1) Past conservation efforts have successfully reduced soil erosion but more is needed to reduce nutrients like nitrogen and phosphorus. The scale of the problem requires solutions at the watershed scale rather than just the farm scale.
2) By understanding how landscapes have changed and nutrient flowpaths, critical source areas and sink areas can be identified. Restoring sinks on just 1-2% of the landscape can decrease downstream loads by 45%.
3) The watershed approach follows nutrient flowpaths and prioritizes practices to reduce sources, transport, and restore sinks. These may include improved fertilizer management, cover crops
This document provides an overview of various topics related to irrigation, including different irrigation methods like drip, sprinkler and border strip irrigation. It discusses design aspects and components of these systems as well as their operation and maintenance. Other topics covered include irrigation scheduling, efficiency and water quality issues. It also touches on water management challenges like waterlogging and the role of community participation and water user organizations. The document outlines the term work which involves a presentation, assignments and exam on the introductory chapters.
Groundwater modeling has several purposes including understanding aquifer properties, characteristics, and response. It requires collecting hydrological, physical, and boundary condition data. Common groundwater modeling software includes MODFLOW and Sutra. The modeling process involves defining the problem, collecting data, choosing a code, running simulations, verifying results match field data through calibration, and using the model to inform management decisions.
This document discusses best management practices for subsurface drainage on cropland. It begins by outlining conditions that require subsurface drainage, such as uneven soil moisture, inadequate natural drainage for certain crops, soils with high water tables, and barriers that limit water flow. Diagnosing drainage issues accurately is the first step in planning a drainage system. The document will then guide the reader through the entire process from system design to installation, maintenance, and emerging technologies. The overall goals are to manage crop inputs and contaminants, remove excess water while conserving it, manage wet areas, and protect adjacent wetlands.
The document describes WEAP (Water Evaluation and Planning), a water resources planning model. It provides an overview of WEAP's features and capabilities for integrated water resources management. These include built-in models, a model-building interface, reporting tools, and a GIS-based graphical user interface. The document then presents a case study application of WEAP for the Langat River Basin in Malaysia to investigate water supply and demand trends and assess water availability under future scenarios. The WEAP model developed for the basin was calibrated and validated and able to reasonably simulate streamflows. Modeling results show increasing future water deficits without intervention and the benefits of demand management and reduction of non-revenue water losses.
This document discusses the quality of irrigation water and criteria for determining water quality. It outlines 5 classes of water salinity based on electrical conductivity and 4 classes of sodium level based on sodium adsorption ratio. It also discusses acceptable boron levels and provides management practices for using poor quality water, including applying gypsum, alternate irrigation strategies, fertilizer application techniques, irrigation methods, growing crop varieties, drainage, and other soil management practices. The document concludes with a discussion of soil fertility versus productivity and different methods for evaluating soil fertility.
This document provides information on developing cropping systems for watershed areas. It discusses key characteristics of watersheds including shape, physiography, slopes, climate, vegetation, geology and soils, hydrology, and socio-economics. The principles of cropping systems in watershed areas focus on conserving resources while generating and utilizing resources. Common types of cropping systems include monocropping, multiple cropping, intercropping, and mixed cropping. Criteria for selecting crops and developing proper cropping systems in watershed areas take into account soil type, market demand, labor requirements, and growing periods.
This document discusses irrigation and crop water requirements. It outlines several advantages of irrigation including preventing disease and weeds, enabling cash crops, improving groundwater storage, and increasing crop yields. Some disadvantages are excessive water leakage causing marshes, waterlogging from high water tables, lower temperatures, and land/water pollution. Crop water requirement depends on factors like crop type, growth stage, soil properties, climate, and agronomic practices. It is the total water needed from sowing to harvest and includes transpiration, evaporation, and water for plant metabolism. The factors affecting consumptive water use by crops are also summarized.
This document discusses various methods for irrigation scheduling to maximize crop yields. It defines irrigation scheduling as determining the frequency and timing of water applications based on crop needs and soil conditions. Direct approaches determine optimal schedules through field trials of different watering intervals and depths, while indirect approaches use indicators like soil moisture levels or sensitive plant species to determine crop water needs. More accurate mathematical approaches estimate needs based on climate data, soil type, and crop water requirements. The document also discusses practical considerations like soil properties, irrigation methods, and minimizing excess water that can damage crops. Overall, the goal of irrigation scheduling is to meet crop water demands and maximize production using water resources efficiently.
Introduction to irrigation and drainageMulenge Peter
Irrigation is any process other than natural precipitation, which supplies water artificially to the soil to make up the deficiency of moisture under natural conditions for the profitable growth of crops, which otherwise would not be assured.
The irrigation process involves investigation, planning, design, construction, maintenance and operation of structures and channels for the proper conveyance of water from the source to the point of application.
This document discusses techniques for measuring stream flow. There are two main categories of measurement: direct determination using area-velocity methods, dilution techniques, electromagnetic and ultrasonic methods; and indirect determination using hydraulic structures like weirs, flumes and gates or slope-area methods. Velocity is an important aspect measured using current meters, which are the most commonly used instruments. Current meters consist of rotating cups or propellers connected to mechanisms that count revolutions to determine flow velocity. Floating objects can also be used to estimate surface velocities. Accurate stream flow measurement is important for hydrologic studies.
What is prioritization?
Prioritization is done to select the area of interest.
Prioritization is a process of identifying areas of main concern based on single or many parameters
Selection of one or few watersheds out of many watersheds by using predefined set of criteria.
Meteorological, agricultural, and hydrological drought are the three main types of drought. Several indices are used to measure drought severity, including the Standardized Precipitation Index (SPI), Palmer Drought Severity Index (PDSI), Surface Water Supply Index (SWSI), Moisture Adequacy Index (MAI), and Crop Water Stress Index (CWSI). The SPI quantifies precipitation deficit for different time scales, while the PDSI incorporates temperature and soil moisture data to calculate drought. The SWSI integrates snowpack, rainfall, streamflow, and reservoir levels. The MAI assesses agricultural drought based on actual and potential evapotranspiration. The CWSI provides a daily measure of
The document discusses the course content for Irrigation Engineering. The course covers various topics related to irrigation including irrigation methods, diversion and impounding structures, canal irrigation, and irrigation water management. Some key concepts discussed include the need for irrigation given factors like insufficient and uneven rainfall, crop water requirements, and irrigation efficiencies. Different irrigation techniques are examined such as canal irrigation, lift irrigation, sprinkler irrigation and drip irrigation. Structures for diverting and storing water like weirs, dams, and spillways are also covered.
This document provides an introduction to drought indices, which are quantitative measures used to characterize drought levels by combining data from indicators like precipitation and evapotranspiration. It discusses the types and characteristics of drought, as well as several major drought indices commonly used for monitoring and planning, including the Standardized Precipitation Index (SPI) and Palmer Drought Severity Index (PDSI). The document also covers taxonomy of drought indices and case studies of drought in India characterized using indices.
Evaporation is a process by which water changed from the liquid or solid state into the gaseous state through the absorption of heat
It is always related to the loss of water from a free surface over a fixed time interval. Either direct observation or calculation based on the factors involved in the transfer of thermal energy.
One of the fundamental component of hydrological cycle
Essential requirements in the process are
The source of energy to vaporize the liquid water (solar or wind)
The presence of gradient of concentration between the evaporating surface and the surrounding air.
The document discusses a course on analyzing pumping tests for groundwater aquifers. The course aims to teach participants how to determine aquifer properties through pumping tests. It covers key concepts like drawdown, specific capacity, and transmissivity. Participants will learn how to plan and optimize pumping tests, apply analytical techniques to interpret test data, and use software to analyze projects. The document provides an overview of the topics that will be covered in the course sessions, including aquifer conditions, equations for flow to wells, and methods for analyzing pumping test results.
Groundwater modeling has several purposes including understanding aquifer properties, characteristics, and response. It requires collecting hydrological, physical, and boundary condition data. Common groundwater modeling software includes MODFLOW and Sutra. The modeling process involves defining the problem, collecting data, choosing a code, running simulations, verifying results match field data through calibration, and using the model to inform management decisions.
This document discusses best management practices for subsurface drainage on cropland. It begins by outlining conditions that require subsurface drainage, such as uneven soil moisture, inadequate natural drainage for certain crops, soils with high water tables, and barriers that limit water flow. Diagnosing drainage issues accurately is the first step in planning a drainage system. The document will then guide the reader through the entire process from system design to installation, maintenance, and emerging technologies. The overall goals are to manage crop inputs and contaminants, remove excess water while conserving it, manage wet areas, and protect adjacent wetlands.
The document describes WEAP (Water Evaluation and Planning), a water resources planning model. It provides an overview of WEAP's features and capabilities for integrated water resources management. These include built-in models, a model-building interface, reporting tools, and a GIS-based graphical user interface. The document then presents a case study application of WEAP for the Langat River Basin in Malaysia to investigate water supply and demand trends and assess water availability under future scenarios. The WEAP model developed for the basin was calibrated and validated and able to reasonably simulate streamflows. Modeling results show increasing future water deficits without intervention and the benefits of demand management and reduction of non-revenue water losses.
This document discusses the quality of irrigation water and criteria for determining water quality. It outlines 5 classes of water salinity based on electrical conductivity and 4 classes of sodium level based on sodium adsorption ratio. It also discusses acceptable boron levels and provides management practices for using poor quality water, including applying gypsum, alternate irrigation strategies, fertilizer application techniques, irrigation methods, growing crop varieties, drainage, and other soil management practices. The document concludes with a discussion of soil fertility versus productivity and different methods for evaluating soil fertility.
This document provides information on developing cropping systems for watershed areas. It discusses key characteristics of watersheds including shape, physiography, slopes, climate, vegetation, geology and soils, hydrology, and socio-economics. The principles of cropping systems in watershed areas focus on conserving resources while generating and utilizing resources. Common types of cropping systems include monocropping, multiple cropping, intercropping, and mixed cropping. Criteria for selecting crops and developing proper cropping systems in watershed areas take into account soil type, market demand, labor requirements, and growing periods.
This document discusses irrigation and crop water requirements. It outlines several advantages of irrigation including preventing disease and weeds, enabling cash crops, improving groundwater storage, and increasing crop yields. Some disadvantages are excessive water leakage causing marshes, waterlogging from high water tables, lower temperatures, and land/water pollution. Crop water requirement depends on factors like crop type, growth stage, soil properties, climate, and agronomic practices. It is the total water needed from sowing to harvest and includes transpiration, evaporation, and water for plant metabolism. The factors affecting consumptive water use by crops are also summarized.
This document discusses various methods for irrigation scheduling to maximize crop yields. It defines irrigation scheduling as determining the frequency and timing of water applications based on crop needs and soil conditions. Direct approaches determine optimal schedules through field trials of different watering intervals and depths, while indirect approaches use indicators like soil moisture levels or sensitive plant species to determine crop water needs. More accurate mathematical approaches estimate needs based on climate data, soil type, and crop water requirements. The document also discusses practical considerations like soil properties, irrigation methods, and minimizing excess water that can damage crops. Overall, the goal of irrigation scheduling is to meet crop water demands and maximize production using water resources efficiently.
Introduction to irrigation and drainageMulenge Peter
Irrigation is any process other than natural precipitation, which supplies water artificially to the soil to make up the deficiency of moisture under natural conditions for the profitable growth of crops, which otherwise would not be assured.
The irrigation process involves investigation, planning, design, construction, maintenance and operation of structures and channels for the proper conveyance of water from the source to the point of application.
This document discusses techniques for measuring stream flow. There are two main categories of measurement: direct determination using area-velocity methods, dilution techniques, electromagnetic and ultrasonic methods; and indirect determination using hydraulic structures like weirs, flumes and gates or slope-area methods. Velocity is an important aspect measured using current meters, which are the most commonly used instruments. Current meters consist of rotating cups or propellers connected to mechanisms that count revolutions to determine flow velocity. Floating objects can also be used to estimate surface velocities. Accurate stream flow measurement is important for hydrologic studies.
What is prioritization?
Prioritization is done to select the area of interest.
Prioritization is a process of identifying areas of main concern based on single or many parameters
Selection of one or few watersheds out of many watersheds by using predefined set of criteria.
Meteorological, agricultural, and hydrological drought are the three main types of drought. Several indices are used to measure drought severity, including the Standardized Precipitation Index (SPI), Palmer Drought Severity Index (PDSI), Surface Water Supply Index (SWSI), Moisture Adequacy Index (MAI), and Crop Water Stress Index (CWSI). The SPI quantifies precipitation deficit for different time scales, while the PDSI incorporates temperature and soil moisture data to calculate drought. The SWSI integrates snowpack, rainfall, streamflow, and reservoir levels. The MAI assesses agricultural drought based on actual and potential evapotranspiration. The CWSI provides a daily measure of
The document discusses the course content for Irrigation Engineering. The course covers various topics related to irrigation including irrigation methods, diversion and impounding structures, canal irrigation, and irrigation water management. Some key concepts discussed include the need for irrigation given factors like insufficient and uneven rainfall, crop water requirements, and irrigation efficiencies. Different irrigation techniques are examined such as canal irrigation, lift irrigation, sprinkler irrigation and drip irrigation. Structures for diverting and storing water like weirs, dams, and spillways are also covered.
This document provides an introduction to drought indices, which are quantitative measures used to characterize drought levels by combining data from indicators like precipitation and evapotranspiration. It discusses the types and characteristics of drought, as well as several major drought indices commonly used for monitoring and planning, including the Standardized Precipitation Index (SPI) and Palmer Drought Severity Index (PDSI). The document also covers taxonomy of drought indices and case studies of drought in India characterized using indices.
Evaporation is a process by which water changed from the liquid or solid state into the gaseous state through the absorption of heat
It is always related to the loss of water from a free surface over a fixed time interval. Either direct observation or calculation based on the factors involved in the transfer of thermal energy.
One of the fundamental component of hydrological cycle
Essential requirements in the process are
The source of energy to vaporize the liquid water (solar or wind)
The presence of gradient of concentration between the evaporating surface and the surrounding air.
The document discusses a course on analyzing pumping tests for groundwater aquifers. The course aims to teach participants how to determine aquifer properties through pumping tests. It covers key concepts like drawdown, specific capacity, and transmissivity. Participants will learn how to plan and optimize pumping tests, apply analytical techniques to interpret test data, and use software to analyze projects. The document provides an overview of the topics that will be covered in the course sessions, including aquifer conditions, equations for flow to wells, and methods for analyzing pumping test results.