This is the 6th lesson of the course - Water Resources Planning and Development taught to Students of BA (General) at the Faculty of Social Sciences and Humanities, Rajarata University of Sri Lanka, Mihintale
This is the 3rd lesson taught to students of B.A. (General) at the Faculty of Social Sciences and Humanities, Rajarata University of Sri Lanka, under the course; Water Resources Planning and Development
This is the 7th lesson of the course - Water Resources Planning and Development, taught to the students of BA (General) at the Faculty of Social Sciences and Humanities, Rajarata University of Sri Lanka
Lesson 1 wrpd introduction - Ancient water resources management in Sri Lanka Dr. P.B.Dharmasena
This is the first lesson of the course - Water Resources Planning and Development taught at the Faculty of Social Sciences and Humanities, Rajarata University of Sri Lanka, Mihintale
This is the third lecture of the course 'Irrigation based Agro-ecosystems' conducted at the Faculty of Social Sciences and Humanities of the Rajarata University of Sri Lanka
This presentation explains the ancient master plan of water resources management, tank cascades - spatial distribution, definitions, and importance, ecosystem services, and functions and planning procedures.
Lessons adoptable from ancient water management of Sri LankaDr. P.B.Dharmasena
The presentation discussed the objectives of ancient water management in Sri Lanka as:
1. Irrigation for food production
2. Human needs (settlement, drinking water, bathing, domestic needs etc.)
3. Rainwater harvesting systems
4. Environmental existence (flora, fauna etc.)
5. Building cities (Anuradhapura, Sigiriya etc.)
6. Urban planning
7. Basis for administrative boundaries
8. Mitigation of natural disasters (drought, flood, cyclone, epidemics etc.)
This is lesson No. 9 of the course - Water Resources Planning and Development taught to BA (General) degree students at the Faculty of Social Sciences and Humanities, Rajarata University of Sri Lanka, Mihintale
Sea Water Intrusion(SWI) in coastal areas :
1. Occurrence of seawater intrusion
2.Factors that affect coastal aquifer
3.Changes by hydrological regime
4.Problems due to SWI
5.Ghyben-Herzberg relation
6.Methods to detect SWI
7.Control measures
This is the 3rd lesson taught to students of B.A. (General) at the Faculty of Social Sciences and Humanities, Rajarata University of Sri Lanka, under the course; Water Resources Planning and Development
This is the 7th lesson of the course - Water Resources Planning and Development, taught to the students of BA (General) at the Faculty of Social Sciences and Humanities, Rajarata University of Sri Lanka
Lesson 1 wrpd introduction - Ancient water resources management in Sri Lanka Dr. P.B.Dharmasena
This is the first lesson of the course - Water Resources Planning and Development taught at the Faculty of Social Sciences and Humanities, Rajarata University of Sri Lanka, Mihintale
This is the third lecture of the course 'Irrigation based Agro-ecosystems' conducted at the Faculty of Social Sciences and Humanities of the Rajarata University of Sri Lanka
This presentation explains the ancient master plan of water resources management, tank cascades - spatial distribution, definitions, and importance, ecosystem services, and functions and planning procedures.
Lessons adoptable from ancient water management of Sri LankaDr. P.B.Dharmasena
The presentation discussed the objectives of ancient water management in Sri Lanka as:
1. Irrigation for food production
2. Human needs (settlement, drinking water, bathing, domestic needs etc.)
3. Rainwater harvesting systems
4. Environmental existence (flora, fauna etc.)
5. Building cities (Anuradhapura, Sigiriya etc.)
6. Urban planning
7. Basis for administrative boundaries
8. Mitigation of natural disasters (drought, flood, cyclone, epidemics etc.)
This is lesson No. 9 of the course - Water Resources Planning and Development taught to BA (General) degree students at the Faculty of Social Sciences and Humanities, Rajarata University of Sri Lanka, Mihintale
Sea Water Intrusion(SWI) in coastal areas :
1. Occurrence of seawater intrusion
2.Factors that affect coastal aquifer
3.Changes by hydrological regime
4.Problems due to SWI
5.Ghyben-Herzberg relation
6.Methods to detect SWI
7.Control measures
Environmental Problems in Water Resources Development. This is the 2nd lesson taught to students of B.A. (General) degree programme under Water Resources Planning and Development Course at Faculty of Social Sciences and Humanities, Rajarata University of Sri Lanka, Mihintale.
There are four main types of river channel management strategies:
1) Realignment straightens river channels to increase flow speed and reduce flooding.
2) Resectioning widens and deepens channels to increase water carrying capacity.
3) Bank protection like levees and revetments divert flow away from banks, reducing erosion.
4) Planting vegetation on banks holds soil and slows surface runoff to reduce flooding and erosion.
While effective initially, channelization disrupts natural processes and may cause issues downstream over time like flooding or sediment accumulation. It also damages local ecosystems. Non-structural approaches are often better long term solutions.
O poema descreve como o mundo seria melhor se o autor pudesse fazer mudanças, como transformar ruas em locais para crianças brincarem, proteger florestas para pássaros, e impedir poluição de rios para proteger peixes, de modo que o mundo se tornaria um paraíso para animais, plantas e crianças.
O documento discute o escoamento superficial, sub-superficial e de base, definindo-os e explicando sua importância para determinar o volume escoado, vazão de enchente, umidade do solo e recarga de lençóis freáticos. Também aborda hidrogramas, precipitação efetiva e escoamento de base.
The document discusses urban flooding in the Chandbarh and Shakti Nagar areas of Bhopal, India. It analyzes the causes of flooding in Chandbarh, which has narrow streets and drainage canals, dense population, and little green space. In contrast, Shakti Nagar has wider streets, planned development, trees along roads, and parks, resulting in less flooding. The document then provides seven potential solutions to reduce urban flooding, including preserving forests and wetlands, installing green and blue roofs, building tree trenches and bioswales, using permeable pavement, and collecting rainwater in barrels or cisterns. All solutions require regular maintenance to function properly over the long term.
This is the 5th lesson of the course - Water Resources Planning and Development taught to students of BA (General), Faculty of Social Sciences and Humanities, Rajarata University of Sri Lanka
seminar report of " Introduction to HEC RAS "ankit jain
This document provides an overview of the capabilities of the Hydrologic Engineering Center's River Analysis System (HEC-RAS) software. HEC-RAS allows for one-dimensional steady and unsteady flow river hydraulics calculations, sediment transport modeling, and water temperature analysis. The software includes components for steady flow water surface profiles, unsteady flow simulation, sediment transport, and water quality analysis. It also features a graphical user interface, data management capabilities, and reporting tools. The seminar report discusses HEC-RAS functionality in more detail.
Este documento discute os comitês de bacias hidrográficas no Brasil e em São Paulo. Explica que os comitês são colegiados instituídos por lei para gerenciar a água de forma descentralizada e participativa. Também descreve as principais bacias hidrográficas brasileiras e paulistas, como a bacia do Rio Piracicaba, e discute a história da política de recursos hídricos no estado de São Paulo.
The document discusses water resource management and the role of dams. It provides information on several key points:
1) Water resource management involves planning, developing, distributing and managing water resources in an optimal way. Dams play an important role in the development and management of water resources.
2) Dams have both positive and negative environmental impacts. They provide benefits like flood control and hydroelectric power but can also negatively impact ecosystems, cause displacement of people, and change physical and chemical properties of the environment.
3) Case studies of controversial dam projects in India, China, and Pakistan are discussed, including the proposed Subansiri dam project in India which has faced construction challenges. Mitigation of environmental impacts and controvers
Chapter 1: Introduction to River Hydraulicsgemedo gelgelu
This document provides an overview of river hydraulics and morphology. It discusses how rivers adjust over time based on natural forces and human activities. Key points include:
- Rivers can be classified based on factors like flow patterns, location, and channel shape. Meandering and braided rivers are described.
- Sediment transport involves erosion, deposition, and different load types being suspended, rolling along the bed, or in traction.
- River channels and morphology vary based on location in a watershed and sediment characteristics. Meandering develops through erosion on concave banks and deposition on convex banks.
The lecture delivered for Agricultural Instructors working for Climate Smart Agriculture Project in 11 districts of Sri Lanka. It explains the difference between climate and weather, factors affecting climate variation in Sri Lanka, Rainfall, altitude, degree of wetness etc.
This document provides information about water logging in Pakistan. It discusses:
- What water logging is and its causes
- Areas of Pakistan that are most affected, with over 50% of land in Pakistan impacted
- The effects of water logging on agriculture and land productivity, including decreasing crop yields and making land uncultivated
- Methods for controlling water logging, including drainage systems, choosing appropriate crops, and planting trees to control water tables
1. The document discusses methods to identify saltwater intrusion in coastal aquifers, including geophysical methods, geochemical investigations, and numerical modeling. Geophysical surveys and monitoring of groundwater levels and chemistry can detect the intrusion of saline water. Numerical models like MODFLOW and EFDC are used to simulate groundwater flow and salinity transport.
2. Results from various studies are presented. Geophysical monitoring showed tidal influence on groundwater levels. Modeling indicated sources of recharge and the spatial extent of intrusion over time. Validation of models compared observed and simulated data.
3. Saltwater intrusion poses an environmental threat as human activities like groundwater pumping can lead to overexploitation and degradation
Este documento fornece dicas para economizar água no banheiro e na cozinha. Ele recomenda consertar torneiras pingando, tomar banhos mais curtos, fechar o registro ao se ensaboar, lavar louça de forma eficiente e usar máquinas de lavar na capacidade máxima.
Water management in Nepal by Krishna SedaiKrishna Sedai
This document provides an overview of water management in Nepal and irrigation management organizations. It discusses that Nepal has abundant water resources but only a small portion is utilized. It also outlines the key institutions and organizations involved in setting policies and plans, regulating, and providing water services in Nepal. These include the Ministry of Energy, Water Resources and Irrigation, the Irrigation and Water Resources Management Project, and Community Managed Irrigated Agriculture Sector Project, which work to improve irrigation and agriculture. Farmer Managed Irrigation Systems are also discussed as important indigenous organizations for managing local water resources.
River bank erosion is a major natural hazard in Bangladesh that causes significant land and property loss each year. Three key points:
1) Major rivers like the Jamuna and Padma have widened over 3 km and eroded over 130,000 hectares of land in the last 30 years according to satellite image analysis.
2) Case studies show river bank erosion displacing over 4,000 people and causing over 4 crore BDT in economic losses annually in some districts. A majority of affected people face poverty due to loss of land and livelihood.
3) While structural measures like embankments are used, long-term policies addressing resettlement, land zoning, and afforestation are needed to
Environmental Problems in Water Resources Development. This is the 2nd lesson taught to students of B.A. (General) degree programme under Water Resources Planning and Development Course at Faculty of Social Sciences and Humanities, Rajarata University of Sri Lanka, Mihintale.
There are four main types of river channel management strategies:
1) Realignment straightens river channels to increase flow speed and reduce flooding.
2) Resectioning widens and deepens channels to increase water carrying capacity.
3) Bank protection like levees and revetments divert flow away from banks, reducing erosion.
4) Planting vegetation on banks holds soil and slows surface runoff to reduce flooding and erosion.
While effective initially, channelization disrupts natural processes and may cause issues downstream over time like flooding or sediment accumulation. It also damages local ecosystems. Non-structural approaches are often better long term solutions.
O poema descreve como o mundo seria melhor se o autor pudesse fazer mudanças, como transformar ruas em locais para crianças brincarem, proteger florestas para pássaros, e impedir poluição de rios para proteger peixes, de modo que o mundo se tornaria um paraíso para animais, plantas e crianças.
O documento discute o escoamento superficial, sub-superficial e de base, definindo-os e explicando sua importância para determinar o volume escoado, vazão de enchente, umidade do solo e recarga de lençóis freáticos. Também aborda hidrogramas, precipitação efetiva e escoamento de base.
The document discusses urban flooding in the Chandbarh and Shakti Nagar areas of Bhopal, India. It analyzes the causes of flooding in Chandbarh, which has narrow streets and drainage canals, dense population, and little green space. In contrast, Shakti Nagar has wider streets, planned development, trees along roads, and parks, resulting in less flooding. The document then provides seven potential solutions to reduce urban flooding, including preserving forests and wetlands, installing green and blue roofs, building tree trenches and bioswales, using permeable pavement, and collecting rainwater in barrels or cisterns. All solutions require regular maintenance to function properly over the long term.
This is the 5th lesson of the course - Water Resources Planning and Development taught to students of BA (General), Faculty of Social Sciences and Humanities, Rajarata University of Sri Lanka
seminar report of " Introduction to HEC RAS "ankit jain
This document provides an overview of the capabilities of the Hydrologic Engineering Center's River Analysis System (HEC-RAS) software. HEC-RAS allows for one-dimensional steady and unsteady flow river hydraulics calculations, sediment transport modeling, and water temperature analysis. The software includes components for steady flow water surface profiles, unsteady flow simulation, sediment transport, and water quality analysis. It also features a graphical user interface, data management capabilities, and reporting tools. The seminar report discusses HEC-RAS functionality in more detail.
Este documento discute os comitês de bacias hidrográficas no Brasil e em São Paulo. Explica que os comitês são colegiados instituídos por lei para gerenciar a água de forma descentralizada e participativa. Também descreve as principais bacias hidrográficas brasileiras e paulistas, como a bacia do Rio Piracicaba, e discute a história da política de recursos hídricos no estado de São Paulo.
The document discusses water resource management and the role of dams. It provides information on several key points:
1) Water resource management involves planning, developing, distributing and managing water resources in an optimal way. Dams play an important role in the development and management of water resources.
2) Dams have both positive and negative environmental impacts. They provide benefits like flood control and hydroelectric power but can also negatively impact ecosystems, cause displacement of people, and change physical and chemical properties of the environment.
3) Case studies of controversial dam projects in India, China, and Pakistan are discussed, including the proposed Subansiri dam project in India which has faced construction challenges. Mitigation of environmental impacts and controvers
Chapter 1: Introduction to River Hydraulicsgemedo gelgelu
This document provides an overview of river hydraulics and morphology. It discusses how rivers adjust over time based on natural forces and human activities. Key points include:
- Rivers can be classified based on factors like flow patterns, location, and channel shape. Meandering and braided rivers are described.
- Sediment transport involves erosion, deposition, and different load types being suspended, rolling along the bed, or in traction.
- River channels and morphology vary based on location in a watershed and sediment characteristics. Meandering develops through erosion on concave banks and deposition on convex banks.
The lecture delivered for Agricultural Instructors working for Climate Smart Agriculture Project in 11 districts of Sri Lanka. It explains the difference between climate and weather, factors affecting climate variation in Sri Lanka, Rainfall, altitude, degree of wetness etc.
This document provides information about water logging in Pakistan. It discusses:
- What water logging is and its causes
- Areas of Pakistan that are most affected, with over 50% of land in Pakistan impacted
- The effects of water logging on agriculture and land productivity, including decreasing crop yields and making land uncultivated
- Methods for controlling water logging, including drainage systems, choosing appropriate crops, and planting trees to control water tables
1. The document discusses methods to identify saltwater intrusion in coastal aquifers, including geophysical methods, geochemical investigations, and numerical modeling. Geophysical surveys and monitoring of groundwater levels and chemistry can detect the intrusion of saline water. Numerical models like MODFLOW and EFDC are used to simulate groundwater flow and salinity transport.
2. Results from various studies are presented. Geophysical monitoring showed tidal influence on groundwater levels. Modeling indicated sources of recharge and the spatial extent of intrusion over time. Validation of models compared observed and simulated data.
3. Saltwater intrusion poses an environmental threat as human activities like groundwater pumping can lead to overexploitation and degradation
Este documento fornece dicas para economizar água no banheiro e na cozinha. Ele recomenda consertar torneiras pingando, tomar banhos mais curtos, fechar o registro ao se ensaboar, lavar louça de forma eficiente e usar máquinas de lavar na capacidade máxima.
Water management in Nepal by Krishna SedaiKrishna Sedai
This document provides an overview of water management in Nepal and irrigation management organizations. It discusses that Nepal has abundant water resources but only a small portion is utilized. It also outlines the key institutions and organizations involved in setting policies and plans, regulating, and providing water services in Nepal. These include the Ministry of Energy, Water Resources and Irrigation, the Irrigation and Water Resources Management Project, and Community Managed Irrigated Agriculture Sector Project, which work to improve irrigation and agriculture. Farmer Managed Irrigation Systems are also discussed as important indigenous organizations for managing local water resources.
River bank erosion is a major natural hazard in Bangladesh that causes significant land and property loss each year. Three key points:
1) Major rivers like the Jamuna and Padma have widened over 3 km and eroded over 130,000 hectares of land in the last 30 years according to satellite image analysis.
2) Case studies show river bank erosion displacing over 4,000 people and causing over 4 crore BDT in economic losses annually in some districts. A majority of affected people face poverty due to loss of land and livelihood.
3) While structural measures like embankments are used, long-term policies addressing resettlement, land zoning, and afforestation are needed to
Presentation made at a Webinar Program on 11th June 2024 for World Environment Day organized jointly by Organization of Environment & Children Rights Preservation (OECRP), and Ace Property & Business Consultants (Pvt.) Ltd (APB)
This is a presentation made on Climate Smart Agriculture for training of trainers under the project on Building Resilience and Strengthening Community Disaster Preparedness in Sri Lanka
4 Climate Resilience WV English for training of trainersDr. P.B.Dharmasena
This is a presentation made for trainers on Climate Resilience
under the project on Building Resilience and Strengthening Community Disaster Preparedness in Sri Lanka
This is a TOT presentation made on Climate Change Mitigation and Adaptation Strategies for the project - Building Resilience and Strengthening Community Disaster Preparedness in Sri Lanka
2 Climate change on agriculture for training of trainersDr. P.B.Dharmasena
This is a TOT presentation on Agriculture and Climate Change
made for the project - Building Resilience and Strengthening Community Disaster Preparedness in Sri Lanka
1 Climate and Soil for training of trainers.WV English.pdfDr. P.B.Dharmasena
This is a presentation made for trainers on soil and climate under the project on Building Resilience and Strengthening Community Disaster Preparedness in Sri Lanka
Developing 2050 Carbon Net Zero Road Map & Strategic Plan for Sri Lanka - ...Dr. P.B.Dharmasena
This validation workshop was held after preparing the Road Map and Strategic Plan for Sri Lanka and the authors are responsible for the agriculture sector.
Sustainable Water Management in Cascade System: A model in Environmentally Se...Dr. P.B.Dharmasena
This document summarizes a presentation given at the International Water Conference in Sri Lanka on sustainable water management in tank cascade systems. Some key points:
- Tank cascade systems are a traditional Sri Lankan method of water resources management that store, convey, and utilize water across interconnected tanks and streams. This helps mitigate droughts and floods.
- The Village Tank Cascade System was declared a Globally Important Agricultural Heritage System by the UN's FAO for its sustainable practices.
- Challenges include high amounts of water lost to the sea each year, lack of coordination between water agencies, and ignoring traditional management systems.
- Tank cascades provide multiple benefits like food/water security, biodiversity,
Restoration of Tank Cascade Systems for Productivity and SustainabilityDr. P.B.Dharmasena
Presentation made for Technical staff of Climate Resilient Integrated Water Management Project (CRIWMP) at Kurunegala on 9th May 2018
Why cascade systems again?
Drought and flood events can be expected more due to climate change
High prevalence of poverty in tank cascade areas
Mal-nutrition can be greatly reduced by tank fishery and animal husbandry
Better land use under cascade principles – addresses ecological issues such as clearance of village forests, unsustainable land use etc.
Improve living conditions
Health issues ? – drinking water, contamination of agro-chemicals and heavy metals leads to kidney failures, malaria etc.
Most importantly It is an answer to drought hazards
A rainwater harvesting technology;
A soil moisture and groundwater maintaining technology;
A soil erosion and siltation control technology;
A technology that ensured the maintenance of ecological balance;
A technology that promotes social cohesion and needs for community leadership;
A system that accommodates spiritual development which promotes egalitarian (equally treated) attitudes especially during droughts;
A system that nurtured the development of drought insurance through animal husbandry
Cascade Tank Village System and identification of novel post graduate researc...Dr. P.B.Dharmasena
Seminar on Research collaboration opportunities with School of Environment and Rural Science, University of New England, Australia - 14th September 2018, NRMC, Peradeniya, Sri Lanka
Main GHGs from agricultural lands are CH4 and N2O
GHG emission can be reduced by 60 % in 2050 through:
Removal of rice straws and through good management practices in paddy fields
Use alternatives to chemical fertilizer
CH4 reduction from livestock by improving feed quality and animal comfort
Reduce N2O emission in soils
Enhance C sequestration in paddy and rainfed uplands through ‘Evergreen Agro-ecosystem’ concept
Carbon stock in agricultural lands can be enhanced by improving land management practices
C sequestration in tea lands can be increased through: Agro-ecosystem approach; Crop diversification; Intercropping; Introduction of shade trees with optimum density; and Rehabilitation of old tea lands
C stock can be increased by 267 % by the year 2050 through Home Garden Intensification
If the proposed mitigation actions are implemented, the country will be able to achieve Net Zero by 2038.
This lecture was delivered to Agricultural Instructors working for Climate Smart Agriculture Project in 11 districts in the dry zone of Sri Lanka. It includes Climate Smart Agriculture, Special characters in CSA, technological packages for crops such as paddy, maize etc. and livestock such as cattle, poultry etc.
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