Breakwaters, jetties, and groins are coastal structures used to protect harbors and shorelines from wave energy. Breakwaters are structures that reflect and dissipate wave energy to shelter harbors. Jetties are narrow structures that project from the shore into water and provide berths for ships. Groins are structures built perpendicular to the shore to trap littoral drift and protect or build beaches. There are different types of each structure based on materials, permeability, and orientation relative to shorelines and water flow.
This document discusses various coastal protection methods, including structural and non-structural approaches. Structural methods involve hard infrastructure like seawalls, bulkheads, revetments, dikes, breakwaters, groins, and jetties/piers. Seawalls are massive structures that resist wave forces to prevent erosion and damage. Bulkheads are smaller vertical walls that prevent land sliding. Revetments are sloped structures that absorb wave energy. Dikes and levees are embankments that regulate water levels and prevent erosion and flooding. Non-structural methods include planting vegetation, which stabilizes the soil and provides habitat, and beach nourishment, which adds sand to increase the beach width.
The document provides an introduction to various coastal structures used for coastal protection. It describes sea dikes, sea walls, revetments, emergency protection, bulkheads, groynes, jetties, breakwaters, and detached breakwaters. Each coastal structure is defined and its applicability is discussed. The document categorizes coastal protection structures as coastal protection, shore protection, beach construction, management solutions, and sea defense. It aims to give an overview of different types of structures used to protect coasts from erosion, flooding, and damage from waves and currents.
This document discusses various coastal defense structures used to protect coastlines from erosion. It describes hard structures like seawalls, breakwaters, groins and jetties which use solid materials to reduce wave energy. It also describes soft structures like beach nourishment, dune building and mangrove planting which use natural materials. Hard structures provide strong defense but can disrupt sediment flows while soft structures are more sustainable but require ongoing maintenance. The effectiveness and tradeoffs of different coastal protection measures are compared. The document also discusses harbor oscillations, how narrowing a harbor's entrance can paradoxically increase wave amplification due to higher quality factors, and references the related 1961 paper by Miles and Munk on the harbor paradox.
Hard engineering approaches involve physical structures like seawalls and breakwaters to protect against coastal erosion. Soft engineering focuses on planning and behavior changes, encouraging minimal interference and using natural protections like beach nourishment, relocating properties, and planting mangroves. While hard structures provide effective short-term protection, they require high maintenance and can cause erosion in unprotected areas. Soft approaches are often more sustainable and environmentally friendly solutions.
The drainage pattern shown is dendritic. A dendritic drainage pattern occurs in regions where the underlying rock is uniform in its resistance to erosion. It resembles the branching pattern of a tree, with many small tributaries that join together into larger streams and rivers, eventually converging to a single outlet. The branching tributaries meet the main rivers at acute angles. This type of drainage pattern suggests an underlying topography that has a uniform resistance to erosion, allowing the drainage network to develop evenly in all directions without being controlled by the geology.
Sea walls provide the highest level of short-term protection against coastal erosion but are very expensive to build and maintain, with erosion issues resurfacing once the wall ends. Groynes are structures built perpendicular to the shore to slow longshore drift and build beaches, but only provide protection for 15-20 years. Piecemeal coastal protection schemes can exacerbate erosion issues down drift as sediment builds up in protected areas, leaving undefended shorelines more vulnerable. Beach nourishment involves adding new sand to eroding beaches and is one of the few options that both protects land and preserves beach resources long term.
TYPES OF RIVER, PERENNIAL & NON PERENNIAL, PERENIAL V/S NON PERENIAL, STAGES OF RIVERS, RIVER STAGES COVERED, MEANDERING, CUT OFF, RIVER TRAINING WORKS, OBJECTIVE OF RIVER TRAINING, CLASSIFICATION OF RIVER TRAINING WORKS, TYPES OF RIVER TRAINING WORK, PICTURES
Breakwaters, jetties, and groins are coastal structures used to protect harbors and shorelines from wave energy. Breakwaters are structures that reflect and dissipate wave energy to shelter harbors. Jetties are narrow structures that project from the shore into water and provide berths for ships. Groins are structures built perpendicular to the shore to trap littoral drift and protect or build beaches. There are different types of each structure based on materials, permeability, and orientation relative to shorelines and water flow.
This document discusses various coastal protection methods, including structural and non-structural approaches. Structural methods involve hard infrastructure like seawalls, bulkheads, revetments, dikes, breakwaters, groins, and jetties/piers. Seawalls are massive structures that resist wave forces to prevent erosion and damage. Bulkheads are smaller vertical walls that prevent land sliding. Revetments are sloped structures that absorb wave energy. Dikes and levees are embankments that regulate water levels and prevent erosion and flooding. Non-structural methods include planting vegetation, which stabilizes the soil and provides habitat, and beach nourishment, which adds sand to increase the beach width.
The document provides an introduction to various coastal structures used for coastal protection. It describes sea dikes, sea walls, revetments, emergency protection, bulkheads, groynes, jetties, breakwaters, and detached breakwaters. Each coastal structure is defined and its applicability is discussed. The document categorizes coastal protection structures as coastal protection, shore protection, beach construction, management solutions, and sea defense. It aims to give an overview of different types of structures used to protect coasts from erosion, flooding, and damage from waves and currents.
This document discusses various coastal defense structures used to protect coastlines from erosion. It describes hard structures like seawalls, breakwaters, groins and jetties which use solid materials to reduce wave energy. It also describes soft structures like beach nourishment, dune building and mangrove planting which use natural materials. Hard structures provide strong defense but can disrupt sediment flows while soft structures are more sustainable but require ongoing maintenance. The effectiveness and tradeoffs of different coastal protection measures are compared. The document also discusses harbor oscillations, how narrowing a harbor's entrance can paradoxically increase wave amplification due to higher quality factors, and references the related 1961 paper by Miles and Munk on the harbor paradox.
Hard engineering approaches involve physical structures like seawalls and breakwaters to protect against coastal erosion. Soft engineering focuses on planning and behavior changes, encouraging minimal interference and using natural protections like beach nourishment, relocating properties, and planting mangroves. While hard structures provide effective short-term protection, they require high maintenance and can cause erosion in unprotected areas. Soft approaches are often more sustainable and environmentally friendly solutions.
The drainage pattern shown is dendritic. A dendritic drainage pattern occurs in regions where the underlying rock is uniform in its resistance to erosion. It resembles the branching pattern of a tree, with many small tributaries that join together into larger streams and rivers, eventually converging to a single outlet. The branching tributaries meet the main rivers at acute angles. This type of drainage pattern suggests an underlying topography that has a uniform resistance to erosion, allowing the drainage network to develop evenly in all directions without being controlled by the geology.
Sea walls provide the highest level of short-term protection against coastal erosion but are very expensive to build and maintain, with erosion issues resurfacing once the wall ends. Groynes are structures built perpendicular to the shore to slow longshore drift and build beaches, but only provide protection for 15-20 years. Piecemeal coastal protection schemes can exacerbate erosion issues down drift as sediment builds up in protected areas, leaving undefended shorelines more vulnerable. Beach nourishment involves adding new sand to eroding beaches and is one of the few options that both protects land and preserves beach resources long term.
TYPES OF RIVER, PERENNIAL & NON PERENNIAL, PERENIAL V/S NON PERENIAL, STAGES OF RIVERS, RIVER STAGES COVERED, MEANDERING, CUT OFF, RIVER TRAINING WORKS, OBJECTIVE OF RIVER TRAINING, CLASSIFICATION OF RIVER TRAINING WORKS, TYPES OF RIVER TRAINING WORK, PICTURES
This document discusses different types of breakwaters. Breakwaters are structures built along coasts to protect areas from wave disturbance. There are three main categories: rubble mound breakwaters, vertical-wall breakwaters, and floating breakwaters. Rubble mound breakwaters are constructed from natural rubble or stone and are the most widely used in Indian ports due to their cost-effectiveness. Vertical-wall breakwaters use concrete blocks or mass concrete and reflect waves without dissipating much energy. Floating breakwaters are removable structures constructed from caissons or pontoons that can be sunk or floated as needed.
Coastal Protection Measures Hard Engineeringchua.geog
Hard coastal protection measures like seawalls, breakwaters, groynes, and gabions can help defend against wave erosion. Seawalls made of concrete absorb wave energy during storms. Breakwaters are often granite and create shallow water to reduce wave impact on coasts. Groynes prevent longshore drift from transporting materials away from the coast. Gabions are wire cages filled with rocks that reinforce other structures and river banks against erosion.
Spillways, Spillway capacity, flood routing through spillways, different type...Denish Jangid
The document discusses spillways, which are structures used to safely discharge water from reservoirs when the water level rises too high. Spillways typically have several key components, including an approach channel, control structure, discharge carrier, discharge channel, and energy dissipators. The control structure regulates water flow and prevents discharge below a fixed level. Energy dissipators, like bucket or baffle types, reduce the water's velocity and kinetic energy before it reaches downstream areas. Spillways must provide stability, safely pass flood waters, operate efficiently, and do so economically.
1. There are three main types of seawalls: vertical, curved, and mound. Vertical seawalls are the easiest to design and construct but can become undermined. Curved seawalls reduce wave reflection and turbulence but are more complex to design. Mound seawalls provide maximum wave energy dissipation but are less durable and have a shorter lifespan.
2. Several seawall systems are described: gravity walls, L-shaped walls with buttresses, and systems that use piles or diaphragm walls to provide support independently of soil weight. Pile-supported systems are less vulnerable to scour but more expensive. Diaphragm systems are flexible and independent of soil surcharge weight.
Chapter 1 introduction to coastal engineering and management strategiesMohsin Siddique
This document provides an overview of coastal engineering and beach processes. It begins with an introduction to coastal engineering and management. It then discusses coastal zone terminology and beach profile terminology. The key processes in the nearshore zone are described, including wave shoaling, breaking, refraction, diffraction, longshore and rip currents. The key components of beaches and how they respond dynamically to sea forces like waves, tides, currents, and storms are also summarized.
Levees are naturally occurring ridges along river banks that are formed above the level of the floodplain. When a river floods, it leaves sediment thickest at the channel edges which raises the level of the banks, creating levees. Repeated flooding further increases the height of levees as more sediment is deposited, leaving the land within protected during subsequent floods.
This document provides information on diversion head works for canals. It defines diversion head works as structures constructed at the head of a canal to divert river water into the canal. The objectives are to raise the water level and regulate supply. Common structures include weirs and barrages. Weirs raise water level using a raised crest, while barrages use gates to pond water. Other components are under-sluices, divide walls, river training works, and canal head regulators which control water flow into the canal. Careful site selection considers factors like river characteristics, land use, and material availability.
Coastal structures are constructed along coastlines to protect the shoreline from erosion and flooding, and to support activities like navigation and recreation. Engineers build different types of coastal structures such as seawalls, revetments, breakwaters, and groins to slow erosion, increase access, and support development. Maintaining coastal structures is important for protecting infrastructure, harbors, and coastal communities.
Meandering rivers form sinuous patterns as they erode the outer banks of bends and deposit sediments inside bends. This process causes the river channel to migrate back and forth over time. Key features of meandering rivers include point bars, which are sediment deposits inside bends, and oxbow lakes, which form when meander loops are cut off from the main river channel. Meandering rivers have a single channel and flow in helical patterns that erode the outer bank and deposit sediments inside bends, causing the characteristic sinuous shape over time.
Soft engineering uses ecological principles to stabilize shorelines and protect coastlines from erosion in an environmentally friendly way. Methods include planting vegetation on sand dunes to hold the sand in place, and preserving mangroves which can trap sediments and reduce wave impacts. Coral reefs also protect coasts by reducing wave speed.
Dams can be classified in several ways:
1. According to use - storage dams store water, diversion dams divert water into canals, and detention dams control floods.
2. According to hydraulic design - overflow dams allow water over the crest, while non-overflow dams keep water below the top.
3. According to material - rigid dams use materials like concrete that don't deform, while non-rigid earth and rockfill dams settle and deform more.
4. According to structural behavior - examples include gravity, arch, buttress, earthen, and rockfill dams.
Breakwaters are structures built along coasts to protect harbors, anchorages, and shorelines from wave damage. They work by reflecting and dissipating wave energy before it reaches the protected area. There are several types of breakwaters including detached, headland, nearshore, attached, rubble mound, vertical, and submerged. The appropriate type depends on factors like water depth, wave climate, and material availability. Successful breakwater design requires detailed surveys of seabed conditions, wave patterns, and material needs to ensure the structure is stable and effective.
design of hydraulic controls and structuresavirup naskar
This document discusses the design of hydraulic controls and structures, focusing on culvert design. It defines a culvert as a conduit under an embankment for surface water drainage, while a bridge carries a pathway over water. Key considerations for culvert design include hydraulic performance, safety, construction/maintenance costs, and environmental impacts. The document describes six types of flow that can occur in culverts depending on flow rates and water levels. Hydraulic analysis is used to determine a suitable culvert size that satisfies the design discharge, length, permissible headwater depth and outlet velocity. Software tools can assist with culvert sizing calculations.
River erosion occurs through processes like abrasion and hydraulic action that wear away rock in the river bed and banks. This shapes the landscape, creating narrow V-shaped valleys through vertical erosion and lengthening rivers upstream through headward erosion. Lateral erosion widens the river channel and forms U-shaped valleys. River transportation involves moving eroded material downstream via traction, saltation, suspension, or solution based on the size and weight of the load.
This document discusses gravity dams. Gravity dams derive their structural integrity from their own weight and resist external forces through mass rather than through the use of materials under compression or tension. The key components of gravity dams are discussed as well as the forces acting on them, including water pressure, uplift pressure, pressure from earthquakes, silt pressure, wave pressure, and ice pressure. Earthquake forces can cause both vertical and horizontal accelerations, producing effects like increased water pressure and horizontal inertia forces.
Topics:
1. Types of Gravity Dam
2. Forces Acting on a Gravity Dam
3. Causes of failure of Gravity Dam
4. Elementary Profile of Gravity Dam
5. Practical Profile of Gravity Dam
6. Limiting height of Gravity Dam
7. Drainage and Inspection Galleries
The document discusses the possibility of dam failures from several causes. It notes that overtopping, piping, foundation failures, and structural issues can lead to dam breaches. Changes in land use, weather patterns, outdated designs, lack of maintenance, and large flood events exceeding spillway capacity also contribute to failures. Two examples of dam failures in India are provided: the Kaddam Project dam in Andhra Pradesh failed in 1958 due to overtopping, and the Machhu II dam in Gujarat failed in 1979 because flood flows greatly exceeded its spillway capacity.
This document defines various terms related to docks and harbors. It describes structures like breakwaters, basins, berths, docks, jetties, piers, quays and wharves that are used in ports and harbors. It also defines terms like approach channel, apron, barges, estuary, harbor, hinterland, littoral drift and navigational aids which are important concepts in the context of docks and harbors. The document provides concise definitions of these terms to explain key infrastructure and processes involved in ports and harbors.
The document discusses methods for flood control, including controlling water levels through dams and check dams, building barriers like levees and flood walls, altering river channels by straightening or widening them, controlling land use around rivers, and using floodways. It provides details on reservoirs, levees, and floodways as specific flood control techniques. Levees are described as earthen embankments built between rivers and protected areas to restrict flood water flow, with considerations for their height and freeboard. The Mississippi River levee system is highlighted as one of the largest in the world.
Transactive networks in the New Zealand retail contextAdvisian
This document discusses the opportunities presented by transactive grids and the sharing economy in the energy sector. Key points:
- Technological advances are enabling new ways for people to buy and share electricity through peer-to-peer trading and other methods. However, widespread adoption requires public understanding of the benefits.
- A transactive grid allows everyday people to dynamically trade electricity with each other to meet personal goals in a way that creates value for consumers and cuts costs for utilities.
- The sharing economy model can be applied to energy through platforms that match generators and consumers to make efficient use of distributed energy resources like rooftop solar.
- Digital technologies like AI assistants, blockchain, analytics and IoT can power
Mobility, our interconnected world, and ITSAdvisian
Intelligent Transport Systems (ITS) have the potential to transform mobility networks and improve journeys for people and businesses. ITS uses technologies like connected vehicles, traffic management systems, and mobility services to provide more integrated, adaptive, and multimodal transportation options. As populations and cities grow, ITS will become more important to efficiently manage increasing transportation demands. Governments will need to work with private sector innovators to develop ITS that balances user experience, data access, pricing signals, and equitable access to mobility. The future of transportation is uncertain but remaining open-minded about new approaches like mobility as a service can help address coming challenges.
This document discusses different types of breakwaters. Breakwaters are structures built along coasts to protect areas from wave disturbance. There are three main categories: rubble mound breakwaters, vertical-wall breakwaters, and floating breakwaters. Rubble mound breakwaters are constructed from natural rubble or stone and are the most widely used in Indian ports due to their cost-effectiveness. Vertical-wall breakwaters use concrete blocks or mass concrete and reflect waves without dissipating much energy. Floating breakwaters are removable structures constructed from caissons or pontoons that can be sunk or floated as needed.
Coastal Protection Measures Hard Engineeringchua.geog
Hard coastal protection measures like seawalls, breakwaters, groynes, and gabions can help defend against wave erosion. Seawalls made of concrete absorb wave energy during storms. Breakwaters are often granite and create shallow water to reduce wave impact on coasts. Groynes prevent longshore drift from transporting materials away from the coast. Gabions are wire cages filled with rocks that reinforce other structures and river banks against erosion.
Spillways, Spillway capacity, flood routing through spillways, different type...Denish Jangid
The document discusses spillways, which are structures used to safely discharge water from reservoirs when the water level rises too high. Spillways typically have several key components, including an approach channel, control structure, discharge carrier, discharge channel, and energy dissipators. The control structure regulates water flow and prevents discharge below a fixed level. Energy dissipators, like bucket or baffle types, reduce the water's velocity and kinetic energy before it reaches downstream areas. Spillways must provide stability, safely pass flood waters, operate efficiently, and do so economically.
1. There are three main types of seawalls: vertical, curved, and mound. Vertical seawalls are the easiest to design and construct but can become undermined. Curved seawalls reduce wave reflection and turbulence but are more complex to design. Mound seawalls provide maximum wave energy dissipation but are less durable and have a shorter lifespan.
2. Several seawall systems are described: gravity walls, L-shaped walls with buttresses, and systems that use piles or diaphragm walls to provide support independently of soil weight. Pile-supported systems are less vulnerable to scour but more expensive. Diaphragm systems are flexible and independent of soil surcharge weight.
Chapter 1 introduction to coastal engineering and management strategiesMohsin Siddique
This document provides an overview of coastal engineering and beach processes. It begins with an introduction to coastal engineering and management. It then discusses coastal zone terminology and beach profile terminology. The key processes in the nearshore zone are described, including wave shoaling, breaking, refraction, diffraction, longshore and rip currents. The key components of beaches and how they respond dynamically to sea forces like waves, tides, currents, and storms are also summarized.
Levees are naturally occurring ridges along river banks that are formed above the level of the floodplain. When a river floods, it leaves sediment thickest at the channel edges which raises the level of the banks, creating levees. Repeated flooding further increases the height of levees as more sediment is deposited, leaving the land within protected during subsequent floods.
This document provides information on diversion head works for canals. It defines diversion head works as structures constructed at the head of a canal to divert river water into the canal. The objectives are to raise the water level and regulate supply. Common structures include weirs and barrages. Weirs raise water level using a raised crest, while barrages use gates to pond water. Other components are under-sluices, divide walls, river training works, and canal head regulators which control water flow into the canal. Careful site selection considers factors like river characteristics, land use, and material availability.
Coastal structures are constructed along coastlines to protect the shoreline from erosion and flooding, and to support activities like navigation and recreation. Engineers build different types of coastal structures such as seawalls, revetments, breakwaters, and groins to slow erosion, increase access, and support development. Maintaining coastal structures is important for protecting infrastructure, harbors, and coastal communities.
Meandering rivers form sinuous patterns as they erode the outer banks of bends and deposit sediments inside bends. This process causes the river channel to migrate back and forth over time. Key features of meandering rivers include point bars, which are sediment deposits inside bends, and oxbow lakes, which form when meander loops are cut off from the main river channel. Meandering rivers have a single channel and flow in helical patterns that erode the outer bank and deposit sediments inside bends, causing the characteristic sinuous shape over time.
Soft engineering uses ecological principles to stabilize shorelines and protect coastlines from erosion in an environmentally friendly way. Methods include planting vegetation on sand dunes to hold the sand in place, and preserving mangroves which can trap sediments and reduce wave impacts. Coral reefs also protect coasts by reducing wave speed.
Dams can be classified in several ways:
1. According to use - storage dams store water, diversion dams divert water into canals, and detention dams control floods.
2. According to hydraulic design - overflow dams allow water over the crest, while non-overflow dams keep water below the top.
3. According to material - rigid dams use materials like concrete that don't deform, while non-rigid earth and rockfill dams settle and deform more.
4. According to structural behavior - examples include gravity, arch, buttress, earthen, and rockfill dams.
Breakwaters are structures built along coasts to protect harbors, anchorages, and shorelines from wave damage. They work by reflecting and dissipating wave energy before it reaches the protected area. There are several types of breakwaters including detached, headland, nearshore, attached, rubble mound, vertical, and submerged. The appropriate type depends on factors like water depth, wave climate, and material availability. Successful breakwater design requires detailed surveys of seabed conditions, wave patterns, and material needs to ensure the structure is stable and effective.
design of hydraulic controls and structuresavirup naskar
This document discusses the design of hydraulic controls and structures, focusing on culvert design. It defines a culvert as a conduit under an embankment for surface water drainage, while a bridge carries a pathway over water. Key considerations for culvert design include hydraulic performance, safety, construction/maintenance costs, and environmental impacts. The document describes six types of flow that can occur in culverts depending on flow rates and water levels. Hydraulic analysis is used to determine a suitable culvert size that satisfies the design discharge, length, permissible headwater depth and outlet velocity. Software tools can assist with culvert sizing calculations.
River erosion occurs through processes like abrasion and hydraulic action that wear away rock in the river bed and banks. This shapes the landscape, creating narrow V-shaped valleys through vertical erosion and lengthening rivers upstream through headward erosion. Lateral erosion widens the river channel and forms U-shaped valleys. River transportation involves moving eroded material downstream via traction, saltation, suspension, or solution based on the size and weight of the load.
This document discusses gravity dams. Gravity dams derive their structural integrity from their own weight and resist external forces through mass rather than through the use of materials under compression or tension. The key components of gravity dams are discussed as well as the forces acting on them, including water pressure, uplift pressure, pressure from earthquakes, silt pressure, wave pressure, and ice pressure. Earthquake forces can cause both vertical and horizontal accelerations, producing effects like increased water pressure and horizontal inertia forces.
Topics:
1. Types of Gravity Dam
2. Forces Acting on a Gravity Dam
3. Causes of failure of Gravity Dam
4. Elementary Profile of Gravity Dam
5. Practical Profile of Gravity Dam
6. Limiting height of Gravity Dam
7. Drainage and Inspection Galleries
The document discusses the possibility of dam failures from several causes. It notes that overtopping, piping, foundation failures, and structural issues can lead to dam breaches. Changes in land use, weather patterns, outdated designs, lack of maintenance, and large flood events exceeding spillway capacity also contribute to failures. Two examples of dam failures in India are provided: the Kaddam Project dam in Andhra Pradesh failed in 1958 due to overtopping, and the Machhu II dam in Gujarat failed in 1979 because flood flows greatly exceeded its spillway capacity.
This document defines various terms related to docks and harbors. It describes structures like breakwaters, basins, berths, docks, jetties, piers, quays and wharves that are used in ports and harbors. It also defines terms like approach channel, apron, barges, estuary, harbor, hinterland, littoral drift and navigational aids which are important concepts in the context of docks and harbors. The document provides concise definitions of these terms to explain key infrastructure and processes involved in ports and harbors.
The document discusses methods for flood control, including controlling water levels through dams and check dams, building barriers like levees and flood walls, altering river channels by straightening or widening them, controlling land use around rivers, and using floodways. It provides details on reservoirs, levees, and floodways as specific flood control techniques. Levees are described as earthen embankments built between rivers and protected areas to restrict flood water flow, with considerations for their height and freeboard. The Mississippi River levee system is highlighted as one of the largest in the world.
Transactive networks in the New Zealand retail contextAdvisian
This document discusses the opportunities presented by transactive grids and the sharing economy in the energy sector. Key points:
- Technological advances are enabling new ways for people to buy and share electricity through peer-to-peer trading and other methods. However, widespread adoption requires public understanding of the benefits.
- A transactive grid allows everyday people to dynamically trade electricity with each other to meet personal goals in a way that creates value for consumers and cuts costs for utilities.
- The sharing economy model can be applied to energy through platforms that match generators and consumers to make efficient use of distributed energy resources like rooftop solar.
- Digital technologies like AI assistants, blockchain, analytics and IoT can power
Mobility, our interconnected world, and ITSAdvisian
Intelligent Transport Systems (ITS) have the potential to transform mobility networks and improve journeys for people and businesses. ITS uses technologies like connected vehicles, traffic management systems, and mobility services to provide more integrated, adaptive, and multimodal transportation options. As populations and cities grow, ITS will become more important to efficiently manage increasing transportation demands. Governments will need to work with private sector innovators to develop ITS that balances user experience, data access, pricing signals, and equitable access to mobility. The future of transportation is uncertain but remaining open-minded about new approaches like mobility as a service can help address coming challenges.
The IoT of Energy | From Smart Products to Intelligent SolutionsAdvisian
Rapid changes in consumer, business and industrial products and technologies, the proliferation of sensors and digital footprints and sophisticated data analytics are driving transformational shifts in many sectors. The energy sector has responded to this change with more energy efficient appliances, digital retail innovations and progressive smart grid investments, but this is modest relative to many others.
This document discusses navigating investment strategies in North America to maximize profit. It outlines Advisian's approach to reducing the time from initial feasibility study to final investment decision (FID) for major capital projects from 6-12 months compared to the traditional approach. Advisian's integrated approach considers strategy, siting, financing, and market access in parallel rather than sequentially to streamline the process. This coordinated workstreams allows projects to be brought online faster, reducing costs and increasing returns.
The blast analysis tool secures the safety of an organisation’s most valuable asset – its people – the nature and effect of a blast event must be fully understood before it occurs to minimise its effect.
For our electricity supply to be reliable in the future, it requires resilience. When we think about the resilience of electricity systems in New Zealand, there are some questions and answers to consider…
Social License | How people can stop projectsAdvisian
Large resource developments have created a paradox – people want investment in their communities, however, there is uncertainty around long-term environmental and social effects. This uncertainty can stop a project in its tracks. Advisian's Mary-Lou Lauria discusses what this means, the causes and outcomes and what can be done to obtain community acceptance.
Moving from Flood Management to Flood ResilienceAdvisian
Register for the webinar: https://advisiannam.webex.com/advisiannam/onstage/g.php?MTID=e0a16ae626a9a24529bbade2272f71687
Are you thinking ahead? Moving from Flood Management to Resilience. Join Advisian’s Robert Larson as he discusses four key elements to flood management and proper resilience planning.
Factors that Contribute to Coastal ProcessesIVAN MON PANES
Coastal processes such as waves, tides, erosion, and deposition shape shorelines. Waves transport energy from the sun and create longshore currents that move sediment parallel to shorelines. Tides are daily fluctuations in ocean height caused by the sun and moon's gravitational pull. Coastal erosion wears away rock and cliffs through wave action, currents, and chemicals. It focuses on headlands, forming caves and stacks. Seawalls and dunes can prevent erosion. Coastal submersion occurs when sediment exceeds the capacity for transport, building beaches, spits, and hooks. Saltwater intrusion pollutes coastal freshwater aquifers as groundwater use induces seawater flow inland.
1. The document discusses different types of coastal structures, their functions, and applications for protecting coastlines and infrastructure from erosion, flooding, and wave damage.
2. It describes soft structures like beachfill and dunes that erode naturally, and hard structures like seawalls, revetments, breakwaters and jetties that are more permanent.
3. The structures protect coastlines and navigation channels, stabilize shorelines and beaches, and enhance recreation; with advantages of hard structures being ability to withstand large forces and function in deep water.
This document summarizes various coastal hazards. It categorizes hazards as either rapid-onset (e.g. coastal flooding from storm surge or tsunamis) or slow-onset (e.g. coastal erosion, land subsidence, or saltwater intrusion). Rapid-onset hazards are caused by sudden events like earthquakes generating tsunamis or storms producing storm surge, while slow-onset hazards occur gradually over time from erosion, sinking land, or encroaching seawater. The document also discusses how human activities like dams, seawalls, and jetties can disrupt sediment flows and influence coastal changes. Mitigation measures proposed include protective infrastructure, emergency response improvements, and climate information services.
The key hazards that occur along coastal areas are coastal erosion, submersion, and saltwater intrusion. Coastal erosion is caused by wave action, tides, and storms and results in the wearing away of coastlines. Submersion happens when sea levels rise, flooding previously dry land. Saltwater intrusion occurs when denser saltwater moves inland underground, contaminating freshwater supplies. These hazards are exacerbated by events like cyclones and sea level rise due to climate change.
This document discusses various coastal geological processes. It describes how coastal erosion occurs through hydraulic action, abrasion, attrition, and solution, forming features like wave-cut cliffs, platforms, sea caves, arches, and stacks. Coastal deposition happens when waves lose energy and drop sediment, forming features like spits, baymouth bars, sand bars, and barrier islands. Coastal inundation, or flooding, can result from storm surges, sea level rise, or tsunamis overtopping or breaching natural or man-made barriers. Coastal subsidence is also discussed, which is the sinking of coastal land caused by various geological processes.
The document discusses the design of marginal bunds and guide banks for river training works. Marginal bunds run parallel to rivers to contain floodwaters within floodplains, while guide banks are curved embankments that guide river flow through structures like bridges. Guide bank design involves determining the waterway width, length and curvature of upstream and downstream guide banks, and sizing the cross-section, stone pitching on slopes, and apron length. Numerical examples demonstrate calculating these parameters for a given river discharge and bed conditions.
The document discusses coastal landforms and the processes that create them. It describes how waves, tides, and currents shape the coastal environment and lead to both erosional and depositional landforms. Erosional features include cliffs, headlands, sea caves, and stacks, which are formed by processes like abrasion and hydraulic action. Depositional landforms include beaches, bars, spits, and barrier islands, which are produced when sediment is transported and deposited by waves, currents, and biological activity.
Dock and Harbor Engineering: Inland Water Transport in India, Tides, Winds and Waves Erosion, Transport of Sediments, Beach Drift, Littoral Drift, Sand Bars, Coast Protection, Classification of Ports and Harbors, Site Selection, Features of Break Waters, Jetties, Wharves, Piers, Facilities required, Dry Docks, Wet Docks, Lift Docks. Floating Docks, Spillways, Navigational Aids, Lighthouses, Terminal Buildings, and Dredging- Special Equipment.
This document summarizes key concepts in coastal geomorphology. It discusses ocean water properties like salinity, temperature, and density which vary based on location. It also describes ocean currents and how they transport heat. Tides are explained as being caused by gravitational pull from the moon and sun. Extreme tides can form landforms. Waves are generated by wind and their characteristics depend on fetch and strength. Waves transform and transport sediment along shorelines via processes like refraction and longshore drift. Erosional and depositional coastal environments are shaped by these processes. Finally, human impacts like stabilization structures are discussed.
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Breakwaters & Training Walls | The good, the bad and the ugly
1. www.advisian.com
Breakwaters &
Training Walls
The good, the bad and the ugly
Lex Nielsen, Principal Consultant, Advisian
Angus Gordon, Principal Consultant,
Coastal Zone Management & Planning
November 2016
2. Across Australia, breakwaters and
training walls have instigated
fundamental perturbations to
coastal and estuary processes, with
significant consequences.
3. Why build breakwaters
and training walls?
… to improve hydraulic conveyance of entrance
channels to:
• Increase discharge capacity for major floods
• Assist in minimising nuance flooding of low
lying areas
• Increase estuary/lower river flushing thereby
“improving” water quality
• Improve navigability by increasing depths,
particularly over entrance bars
• Stabilise entrance location
4. Impacts on coastal processes
• Trap of littoral drift causing down-drift erosion (e.g.
Tweed River breakwaters starving sand to Gold Coast
beaches, Coffs Harbour etc.)
• Change in nearshore wave patterns causing coastal
re-alignment - a sleeper that occurs somewhat
frequently
5. Mobile bed scale modelling has
demonstrated conclusively that
breakwaters can change beach
alignments by creating artificial
headlands forming crenulated
bays on what previously were
linear shorelines.
6. Crenulate shaped bays
• Crenulate shaped bays have been used to stabilize coasts (Richard
Silvester, Siew-Koon Ho)
• Crenulate shaped bays exist between headlands
• They have been scale modelled successfully to predict future
shorelines accurately
7. The red line shows the coastline before artificial breakwater headlands were
developed for the river, and an artificial headland and reef to the right.
Mobile bed scale modelling is used to predict future stable
shoreline accurately (e.g. Brunei scale modelling by Angus
Gordon)
9. Coastal re-alignments
Computer model study of Stockton Beach Newcastle
The northern Hunter River
breakwater had a
significant impact on the
shoreline at Stockton:
• Cut off the flood tide
channel that had run
along the beach and
into the entrance -
removing the entrance
bar and accretion of
sand
• Induced erosion to the
north as the shoreline
responded to the
changed tidal flow
and wave conditions
11. Impacts on estuary processes
Breakwaters enhance hydraulic efficiency and tidal conveyance
12. Long-term impacts on tidal planes
The construction of
entrance breakwaters on
Wallis Lake, Lake Macquarie,
Lake Illawarra and Lake
Wagonga has triggered
unstable scouring modes at
these estuary entrance
channels.
High water levels are
increasing while low water
levels are decreasing (note
various scales).
13. Long-term impacts
on channels
• Channels scoured to greater depths
with removal of seagrasses
• Undermining and collapse of banks
and retaining structures
• Undermining and collapse of
infrastructure (e.g. bridges)
• Deposition on flood tide and ebb tide
deltas including smothering of
seagrasses
15. Long-term impacts of training walls
Training walls stabilise channel and increase hydraulic conveyance
A rock training wall was constructed on the northern bank of the Coffs Creek entrance changed an
ICOLL (Intermittently Closed and Open Lakes and Lagoons) to a permanently open estuary.
16. The
Good
• Improve hydraulic conveyance of entrance
channels to increase discharge capacity,
eliminating nuisance flooding of low-lying
areas and improve water quality
• Stabilise channel thalwegs and increase
depths, improving navigation
• Safer entrance navigation
• Marine sands added to the littoral system and
nourished beaches where entrance scour has
jetted sand out into the littoral system
• Improved surfing opportunities due to “new
breaks” created by breakwaters
17. Channel scour has removed seagrass and sand transport into the
lakes as flood tide delta growth has smothered seagrass
The
Bad
23. The Bad
Expensive capital works have been necessary to reinstate beaches that have eroded as a
consequence of breakwater construction (e.g. Tweed River)
25. The Ugly
Channel scour has resulted in the total collapse of some foreshore buildings
and undermined bridge foundations as well as undermining river training works
(e.g. Swansea Channel Lake Macquarie)
26. The Ugly
Breakwaters have re-aligned the foreshore causing beach erosion, loss of residential
development and other infrastructure (e.g. loss of the entire village of Sheltering Palms at
Brunswick Heads)
27. The Ugly
Breakwaters causing erosion have
sometimes necessitated revetment
construction to limit erosion
thereby destroying beach amenity
(e.g. Stockton Beach at Hunter
River Newcastle).
28. The Ugly
Training walls in tidal channels can create
dangerous conditions that may cause serious
injury to swimmers (e.g. Coffs Creek).
High ebb tide velocities on the ocean bars
have presented challenges to recreational
boating and have seen boating fatalities
(e.g. Foster and Lake Wagonga, Narooma).
29. DISCLAIMER
This presentation has been prepared by a representative of Advisian.
The presentation contains the professional and personal opinions of the presenter, which are given in good faith. As such, opinions presented
herein may not always necessarily reflect the position of Advisian as a whole, its officers or executive.
Any forward-looking statements included in this presentation will involve subjective judgment and analysis and are subject to uncertainties, risks and
contingencies—many of which are outside the control of, and may be unknown to, Advisian.
Advisian and all associated entities and representatives make no representation or warranty as to the accuracy, reliability or completeness of
information in this document and do not take responsibility for updating any information or correcting any error or omission that may become
apparent after this document has been issued.
To the extent permitted by law, Advisian and its officers, employees, related bodies and agents disclaim all liability—direct, indirect or consequential
(and whether or not arising out of the negligence, default or lack of care of Advisian and/or any of its agents)—for any loss or damage suffered by a
recipient or other persons arising out of, or in connection with, any use or reliance on this presentation or information.