61
BY Dhanashri Mirajkar Roll No. 609110 M. Arch. 3rd Semester-2016-17 Department of Architecture, JNEC, Aurangabad ADVANCED BUILDING TECHNOLOGY An exposition on MITIGATION STRATEGIES FOR FLOODING Ar. J. C. Gogte Ar. P. N. Verma Sign of Faculty Sign of HOD

Mitigation strategies for flooding pdf

Embed Size (px)

Citation preview

Page 1: Mitigation strategies for flooding pdf

BY

Dhanashri Mirajkar Roll No. 609110

M. Arch. 3rd Semester-2016-17

Department of Architecture, JNEC, Aurangabad

ADVANCED BUILDING TECHNOLOGY

An exposition onMITIGATION STRATEGIES FOR FLOODING

Ar. J. C. GogteAr. P. N. Verma

Sign of Faculty Sign of HOD

Page 2: Mitigation strategies for flooding pdf

Special Thanks to : SATURDAY FORUM TEAM, NASHIK

Mr. Sojwal Pohekar, Florida Ar. P. N. Verma Sir, Auranagabd

Page 3: Mitigation strategies for flooding pdf

Table of Contents1. Key Words2. What is Flooding?3. What contribute to Flooding?4. What are the most common Flood damages?5. What are characteristics of a SUCCESSFUL Flood Resist Building Design?6. How to achieve a good Flood Resistance Building?7. Illustration upon answers of Q. 58. Precedent of New Orlean city, USA9. Seven Techniques in New Orlean10. Floating House11. Examples of Floating Buildings 12. Flood Barrier Water gate vedio13. My Innovation14. References

Page 4: Mitigation strategies for flooding pdf

1. Key Words

Molds

Inundation An over spreading of any kind, a great influx

Amphibious Functioning in both land & water

These terms are used to indicate the regulatory flood and flood elevation used by the community or Authority Having Jurisdiction (AHJ)

BFE/DFEBase Flood ElevationDesign flood Elevation

Debris Any combination of soil, rock, mud, trees, or vegetation usuallytransported by debris flow.

FEMA Federal Emergency Management Agency, USA

Fungi

Page 5: Mitigation strategies for flooding pdf

2. What is FLOODING???

Page 6: Mitigation strategies for flooding pdf

2. What is FLOODING???

FEMA more specifically defines a flood as

A general and temporary condition of partial or complete inundation of normally dry land areas from

(1) the overflow of inland or tidal watersor

(2) the unusual and rapid accumulation or runoff of surface waters from any source.

Flooding is the overflow of excess water from a water body onto adjacent lands.

Flood Resistance of the Building Envelopeby Christopher P. Jones, PE

Page 7: Mitigation strategies for flooding pdf

3. What contribute to FLOODING???

Page 8: Mitigation strategies for flooding pdf

3. What contribute to FLOODING???

depending on local topography and hydraulic/hydrologic conditions.

One or more water bodies can contribute to flooding at a given site

A river

A bay

A stream

Stormwater

A pond

An oceanA lake

Flood Resistance of the Building Envelopeby Christopher P. Jones, PE

Page 9: Mitigation strategies for flooding pdf

4. What are most common Flooding damages??

Page 10: Mitigation strategies for flooding pdf

4. What are most common flooding damages?

Degradation of building materials, either during the flood or sometime after the flood, and

Direct damage during a flood from inundation, high velocity flow, waves, erosion, sedimentation and/or flood-borne debris,

Contamination of the building due to flood-borne substances or mold.

Flood Resistance of the Building Envelopeby Christopher P. Jones, PE

Page 11: Mitigation strategies for flooding pdf

5. What are characteristics of a SUCCESSFUL Flood Resist Building Design?

Page 12: Mitigation strategies for flooding pdf

5. What are characteristics of a SUCCESSFUL Flood Resist Building Design?

"Successful" Building DesignsA "successful" building will resist flood loads and other loads over a period of decades, and will exhibit the following characteristics:

any flood damage will be minor and easily repairable the foundation will remain intact and fully functional following a

design flood any breakaway enclosures below the DFE will break free without

causing damage to the elevated building, the foundation, building access structures, or utility systems

the building envelope will remain sound utility connections will be intact or easily restorable after a design

flood the building will be accessible and usable after a design flood

Flood Resistance of the Building Envelopeby Christopher P. Jones, PE

Page 13: Mitigation strategies for flooding pdf

5. What are characteristics of a SUCCESSFUL Flood Resist Building Design?

A Successful Flood-resistant design requires the characterization of flood conditions during the design flood, including:

source of floodingflood depthflood velocityflood durationrate of rise and fallwave effectsflood-borne debrisscour and erosion

Flood Resistance of the Building Envelopeby Christopher P. Jones, PE

Page 14: Mitigation strategies for flooding pdf

5. How to achieve a good Flood Resistance Building?

Page 15: Mitigation strategies for flooding pdf

5. How to achieve a good Flood Resistance Building?

1. Site Development.

Flood Proofing

Sealant, Flood shields, Valves

Flood Resistant Materials

Levees & Floodwalls

Flood Openings

Below BFE Elements

Page 16: Mitigation strategies for flooding pdf

5. How to achieve a good Flood Resistance Building?

Site Development

Site Development: Practices and Issues

1. Accessory structures

Detached garages

4. Erosionstructures

3. Fences /privacy walls

Fillingin site

6. GroundElevationsat or above the BFE

7. Septicsystems

Free of Obstructions, Technical Bulletin 5Federal Emergency Management Agency, USA

Flood Resistance of the Building Envelopeby Christopher P. Jones, PE

Page 17: Mitigation strategies for flooding pdf

Accessory structures A low cost & small structure(less than or equal to 100 sq. ft.Made up of metal, wood or plastic should be provided on site detached from main structure & should be detachable.Small accessory structures must be unfinished on the interior, constructed of flood damage-resistant materials, used onlyfor storage, and, if provided with electricity, the service must be elevated above the BFE.

Site Development

Small accessory structure anchored to resist displacement by wind made up of flood proof material

Free of Obstructions, Technical Bulletin 5Federal Emergency Management Agency, USA

Page 18: Mitigation strategies for flooding pdf

Site Development

Detached Garages

Garages may be constructed under elevated buildings and enclosed with breakaway walls

These structures are not walled and roofed in the traditional sense, and can be designed to allow the free passage of floodwaters and waves through structures.

Free of Obstructions, Technical Bulletin 5Federal Emergency Management Agency, USA

Page 19: Mitigation strategies for flooding pdf

Site Development

Fences / privacy walls

Fences and privacy walls (including walls separating one property from another) may obstruct or divert flood flow and waves. They must be analyzed for their effects on flood conditions and the effects of debris generated by fence/wall failure during flood events.

HOMEOWNER’S GUIDE FOR FLOOD, DEBRIS, AND EROSION CONTROLRIVERSIDE FIRE DEPARTMENT, OFFICE OF EMERGENCY MANAGEMENTGUIDED BY PWD, LOS ANGELES

Page 20: Mitigation strategies for flooding pdf

Site Development

Erosion control structures Strengthening the soil to resist erosionStraw or wood chips are effective inholding the soil in place. They have the added value ofincreasing the organic content of the soil. Either material should be workedinto the top few inches of the soil. Place a covering of chips 1 inch (orless) as slope and soil conditions indicate Woven burlap can be laid on theslope and tied down with stakes toprevent lifting by wind or water . The burlap will decomposeeventually, but will remain long enough for vegetation to become wellestablished

UnprotectedHomes causeHigh erosion

ProtectedHomes stoperosion

Burlap

HOMEOWNER’S GUIDE FOR FLOOD, DEBRIS, AND EROSION CONTROLRIVERSIDE FIRE DEPARTMENT, OFFICE OF EMERGENCY MANAGEMENTGUIDED BY PWD, LOS ANGELES

Page 21: Mitigation strategies for flooding pdf

Site Development

Filling in site

Type of fill.

Fill placed on sites should be similar to natural soils in thearea.

In many coastal areas, this will be clean sand or sandy soils,free of large quantities of clay, silt, and organic material.

Non-structural fill should not contain large rocks and debris. If the fill material is truly similar to natural soils, its behavior under flood conditions should be similar to the behavior of natural soils, and should not be a subject of debate.

Free of Obstructions, Technical Bulletin 5Federal Emergency Management Agency, USA

Page 22: Mitigation strategies for flooding pdf

Site Development

The buildings must be designed and constructed on pile or column foundations thatare embedded deep into the ground.

The bottoms of the lowest horizontal supporting members must be at or above theBFE.

A 2-feet vertical clearance between the bottom of the lowest horizontal supportingmember and the ground is recommended.

The soil around such buildings should be graded to drain water away from thefoundations.

Ground elevations at or above the BFE

Free of Obstructions, Technical Bulletin 5Federal Emergency Management Agency, USA

Page 23: Mitigation strategies for flooding pdf

Site Development

Septic systems

Septic system tanks must NOT be structurally attached to building foundations.

Plumbing and piping components must NOT be attached to or pass through breakaway wall panels.

Free of Obstructions, Technical Bulletin 5Federal Emergency Management Agency, USA

Page 24: Mitigation strategies for flooding pdf

Below BFE Elements

Below BFEElements

2. Foundationbracing

4. Shearwalls

1. Access stairs and ramps

3. Gradebeams

5. Slabs

Free of Obstructions, Technical Bulletin 5Federal Emergency Management Agency, USA

Page 25: Mitigation strategies for flooding pdf

Below BFE Elements

Access stairs and ramps

Stairs and ramps required to:

Break away during base flood conditions without causing damage to the building or its foundation,

Resist flood loads and remain in place during the base flood

Free of Obstructions, Technical Bulletin 5Federal Emergency Management Agency, USA

Page 26: Mitigation strategies for flooding pdf

Below BFE Elements

Foundation Bracings

Elevated coastal home with timber cross-bracing, principally in the shore-perpendicular direction

Trapping of floating debris by metal rod cross-bracing

Free of Obstructions, Technical Bulletin 5Federal Emergency Management Agency, USA

Page 27: Mitigation strategies for flooding pdf

Below BFE Elements

Grade Beams

Grade beams typically are made of reinforced concrete or wood; they are used to tie together the foundation piles or columns to provide additional lateral support.

Grade beams must resist flood, wave, anddebris loads when undermined

Free of Obstructions, Technical Bulletin 5Federal Emergency Management Agency, USA

Page 28: Mitigation strategies for flooding pdf

Below BFE Elements

Shear Walls

House elevated on shore-perpendicular shear walls. This design approach is risky for low-rise buildings since lateral out-of-plane loads (wind and flood acting on the faces of the shear walls) can be large and special design considerations and detailing are required.

Failure of shore-perpendicular (and shore-parallel) solid foundation walls, and of beam and floor system supported by the shore-perpendicular wall

Free of Obstructions, Technical Bulletin 5Federal Emergency Management Agency, USA

Page 29: Mitigation strategies for flooding pdf

Below BFE Elements

Slabs Frangible Slab; meaning they are designed to break into smaller pieces when undermined or struck by violent flood waters, causing the pieces to sink rather than travel

Free of Obstructions, Technical Bulletin 5Federal Emergency Management Agency, USA

Page 30: Mitigation strategies for flooding pdf

Flood proofing

What it Flood proofing??

Matthew M. Linham, University of SouthamptonRobert J. Nicholls, University of Southampton

www.climatetechwiki.org/content/flood-proofingFlood Resistance of the Building Envelopeby Christopher P. Jones, PE

Flood proofing is the process of making a building resistant to flood damage, either by taking the building out of contact with floodwaters or by making the building resistant to any potential damage resulting from contact with floodwaters.

ACTIVE Flood proofing

PASSIVEFlood proofing

DRY Flood proofing WET Flood Proofing

DRY Flood proofing WET Flood Proofing

Active flood proofing, sometimes known as contingent (partial) or emergency (temporary) flood proofing, requires human intervention to implement actions that will protect a building and its contents from flooding. Successful use of this technique requires ample warning time to mobilize people and equipment and flood proofing materials.

Passive flood proofing, sometimes referred to as permanent flood proofing, requires no human intervention—the building (and/or its immediate surroundings) is designed and constructed to be flood proof without human intervention.

Page 31: Mitigation strategies for flooding pdf

Flood proofingMatthew M. Linham, University of SouthamptonRobert J. Nicholls, University of Southampton

www.climatetechwiki.org/content/flood-proofingFlood Resistance of the Building Envelopeby Christopher P. Jones, PE

DRY WET

ACTIVE •Temporary flood shields

or doors (on building

openings)

•Temporary gates or

panels (on levees and

floodwalls)

•Emergency sand

bagging

•Temporary relocation of

vulnerable contents and

equipment prior to a flood,

in conjunction with use of

flood-resistant materials

for the building

PASSIVE •Waterproof sealants and

coatings on walls and

floors

•Permanently installed,

automatic flood shields

and doors

•Installation of backflow

prevention valves and

sump pumps

•Use of flood-resistant

materials below DFE

•Installation of flood vents

to permit automatic

equalization of water

levels

•Elevation of vulnerable

equipment above DFE

Examples of Flood proofing Methods for Buildings

Page 32: Mitigation strategies for flooding pdf

Flood proofingMatthew M. Linham, University of SouthamptonRobert J. Nicholls, University of Southampton

www.climatetechwiki.org/content/flood-proofingFlood Resistance of the Building Envelopeby Christopher P. Jones, PE

Examples of Typical DRY Flood proofing Methods for Buildings

Basic dry flood-proofing measures for a residential structure (Source: Linham and Nicholls, 2010)

Dry-flood proofing requires use of special sealants, coatings, components and/or equipment to render the lower portion of a building watertight and substantially impermeable to the passage of water

Page 33: Mitigation strategies for flooding pdf

Flood proofingMatthew M. Linham, University of SouthamptonRobert J. Nicholls, University of Southampton

www.climatetechwiki.org/content/flood-proofingFlood Resistance of the Building Envelopeby Christopher P. Jones, PE

Examples of Typical DRY Flood proofing Methods for Buildings

Wet-flood proofing allows the uninhabited lower portion of a building to flood, but uses materials that will not be damaged by flooding.

Basic wet flood-proofing measures for a residential structure (Source: Linham and Nicholls, 2010)

Page 34: Mitigation strategies for flooding pdf

Sealant, Shields, ValvesFlood Resistance of the Building Envelopeby Christopher P. Jones, PE

Sealants, Flood Shields and Valves A wide variety of materials and devices have been developed to make building walls,

floors, openings, penetrations and utilities watertight during flooding. Flood shields, panels, doors and gates are typically used to close medium to large

openings in building walls. They can be temporary closures that are installed only when a flood threatens, or they

can be permanent features that are closed manually or automatically. Key design parameters of these barriers are their height, their stiffness (and resistance to

hydrostatic forces), their method of attachment or installation, and their seals and gaskets.

As a general rule, flood shields, panels, doors and gates should not be attached to building windows, glazing or doors. Given the potential for large flood loads, they should be attached to exterior walls or the structural frame.

Designers planning to incorporate flood shields, panels, doors or gates into a building design are advised to consult with engineers and vendors experienced with the design and installation of these components

Page 35: Mitigation strategies for flooding pdf

Flood Resistance of the Building Envelopeby Christopher P. Jones, PE

Sealants, Flood Shields and Valves

Sealant, Shields, Valves

Page 36: Mitigation strategies for flooding pdf

Flood Resistance of the Building Envelopeby Christopher P. Jones, PE

Flood Openings

Flood Openings

Areas below the DFE must be equipped with flood openings capable of equalizing water levels and hydrostatic loads.

Openings in Foundation Walls and Walls of Enclosures. Since owners usually want to control temperature and moisture in these enclosed areas (and prevent rodents, birds and insects from entering), opening covers are often employed.

These covers must not interfere with the equalization of water levels in the event of a flood, and

should be selected to minimize potential blockage by debris. There are a variety of commercially available covers, such as grates, louvers and

grills that allow for control of the enclosed space and the passage of floodwaters

Page 37: Mitigation strategies for flooding pdf

Flood Resistance of the Building Envelopeby Christopher P. Jones, PE

Levees & Floodwalls

Levees & Floodwalls

A levee is a natural or artificial slope or wall to regulate water levels. It is usually earthen and often parallel to the course of a river or the coast. Artificial levees are made of many different materials, but are generally made of soil or earth including organic and inorganic materials with varying particle sizes and geotechnical properties. Many levees are constructed in areas that provide compressible, weak foundations. In most levees, due to their large size and age, little information is known about their construction, materials, or structural capacity.Levees are critical components in flood protection and resource management throughout the United States and the world. Heavily populated and developed portions of the US` rely on these systems, and as evidenced by Hurricane Katrina, failure of these structures can result in heavy financial tolls, property damage and the loss of life. According to the American Society of Engineers (ASCE) 2009 Report Card on Infrastructure:

Cross-Section of Typical 3-ft High Levee and 6-ft High Levee, Showing the Difference in the Levee Width (Source: FEMA) Floodgate Being Installed to Close Floodwall

Page 38: Mitigation strategies for flooding pdf

Levees & Floodwalls

Levees & Floodwalls

Paradigm Shifts in Monitoring Levees and Earthen Dams Distributed Fiber Optic Monitoring Systems

Daniele InaudiJoseph Church

www.smartec.ch

Examples of Levees’ failure modes

Page 39: Mitigation strategies for flooding pdf

Levees & Floodwalls

Levees & Floodwallswww.smartec.ch

Traditional Discreet Sensors. Discrete monitoring systems are unreliable formaintenance and inspection systems, and generally considered unreliable as warning systems.

Page 40: Mitigation strategies for flooding pdf

www.smartec.ch

Levees & Floodwalls

Levees & Floodwalls

Distributed fiber optic sensors (depicted in orange) are installed along a leveeat different heights. Multiple cables can be interconnected for a single chain of sensors.Sensors identify strain produced by local settlements or other movements andtemperature sensors detect leakages.

Page 41: Mitigation strategies for flooding pdf

www.smartec.ch

Levees & Floodwalls

Levees & Floodwalls

Distributed fiber optic sensors (depicted in orange) are installed along a levee at different heights. Multiple cables can be interconnected for a single chain of sensors.Sensors identify strain produced by local settlements or other movements and temperatue sensors detect leakages.

Page 42: Mitigation strategies for flooding pdf

Flood Resistant Material

Flood Resistant Materials

Flooring Materials concrete, concrete tile, and pre-cast concrete latex or bituminous, ceramic, clay, terrazzo, vinyl,

and rubber sheets and tiles pressure-treated (PT) or decay resistant lumber PT wood and cold-formed steelWall and Ceiling Materials brick, metal, concrete, concrete block, porcelain,

slate, glass block, stone, and ceramic and clay tile cement board, cold-formed steel, and reinforced

concrete polyester epoxy paint PT and decay resistant lumber PT and marine grade plywood foam and closed-cell insulation decay resistant wood

Black Locust (Robinia pseudoacacia),Teak (Tectona grandis),Ipe (Tabebuia spp),California Redwood(Sequoia sempervirens)

Western Redcedar (Thuja plicata),Loblolly Pine (Pinus taeda) European Larch (Larix decidua).Bald Cypress (Taxodium distichum).

Other hollow metal doors, cabinets, foam or closed-cell insulation

Page 43: Mitigation strategies for flooding pdf
Page 44: Mitigation strategies for flooding pdf

wIKIPEDIA

This is a list of notable recorded floods that have occurred in India.Before 1999

1. In October 1943, Madras saw the worst flood to hit the city. Damage caused to life and property was immense however estimate figure is unknown.2. On 11 August 1979, the Machchu-2 dam situated on the Machhu river burst, thus flooding the town of Morbi in the Rajkot district of Gujarat. Exact figure of loss of lives is unknown, but it is estimated between 1800 and 2500 people.3. In 1987, Bihar state of India witnessed one of its worst flood till then. Flood occurred due to overflow of the Koshi river; which claimed lives of 1,399 humans, 302 animals and public property worth INR ₹68 billion4. Heavy rains across the state of Maharashtra, including large areas of the metropolis Mumbai on 26 July 2005 killed at-least 5,000 people. Mumbai International Airport remained closed for 30 hours, Mumbai-Pune Expressway was closed for 24 hours with public property loss was estimated at ₹550 crore .5. June 2015 Gujarat flood: Heavy rain in June 2015 resulted in widespread flood in Saurashtra region of Gujarat resulting in more than 70 deaths. 6. 2015 South Indian floods: Heavy rain in Nov-Dec 2015 resulted in flooding of Adyar, Cooumrivers in Chennai,Tamil Nadu resulting in financial loss and human lives.8. 2016 Assam floods: Heavy rains in July-August resulted in floods affecting 1.8 million people and flooding the Kaziranga National Park killing around 200 wild animals.

Page 45: Mitigation strategies for flooding pdf

www.livescience.com

Here are the top 20 most vulnerable cities:

1. Guangzhou, China2. Mumbai, India3. Kolkata, India4. Guayaquil, Ecuador5. Shenzen, China6. Miami, Fla.7. Tianjin, China8. New York, N.Y.—Newark, N.J.9. Ho Chi Minh City, Vietnam10. New Orleans, La.

11. Jakarta, Indonesia12. Abidjan, Ivory Coast13. Chennai, India14. Surat, India15. Zhanjiang, China16. Tampa—St. Petersburg, Fla.17. Boston, Mass.18. Bangkok, Thailand19. Xiamen, China20. Nagoya, Japan

Strategies at Urban Scale

Page 46: Mitigation strategies for flooding pdf

Resilient New Orleans

Strategic actions to shape our future city Strategies at Urban Scale

Multiple Lines of DefenseGreater New Orleans is surroundedby 133 miles (214 kilometers) of newlystrengthened levees, floodwalls, and pump stations—the largest coastal flood control system in the nation. This recent $14.5 billioninvestment in hard infrastructure is critical to our future, but coastal restoration and comprehensive urban water management mustcomplement and support that investment to ensure maximum flood protection capacity

Newly Strengthened Levees

Page 47: Mitigation strategies for flooding pdf

Innovative street and public realm designs can slow and store rainwater, reducing flooding and slowing subsidence

Resilient New Orleans

Strategic actions to shape our future city Strategies at Urban Scale

Roadside Water Boulevards

Page 48: Mitigation strategies for flooding pdf

The New Orleans Redevelopment Authority (NORA) and Sewerage & Water Board of New Orleans (SWBNO) are building a series of green infrastructure demonstration projects to show the public how underutilized spaces can be developed to detain storm waterand designed to make neighborhoods more attractive. They are transforming vacant lots into rain gardens that draw runoff from the street, store it temporarily, and capture many of the pollutants it carries.SWBNO is funding innovative green infrastructure solutions such as green roofs, bio swales, and pervious pavement. These projects show us what is possible and how infrastructure can not only protect us but also beautify our communities.

Resilient New Orleans

Strategic actions to shape our future city Strategies at Urban Scale

Rain Gardens in Vacant Plots

Page 49: Mitigation strategies for flooding pdf

Housing NOLA is a community-based 10-year plan designed to meet the housing needs of all New Orleanians, focused on equity, design, and accessibility. Public, private, and non-profit stakeholders are working together to promote access to safe and affordable housing across the city.

Resilient New Orleans

Strategic actions to shape our future city Strategies at Urban Scale

Safe & Affordable Housing

Page 50: Mitigation strategies for flooding pdf

www.archdaily.com Floating House, New Orlean

Architects: Morphosis Architects Location: 1638 Tennessee St, New Orleans, LA 70117, USAProject Year:2009 Project Area: 88.0 sqm1. The FLOAT House is a new kind of house: a house that can sustain its own water and power needs; a house that can survive the floodwaters generated by a storm the size of Hurricane Katrina; and perhaps most importantly, a house that can be manufactured cheaply enough to function as low-income housing.

2. The modular chassis is pre-fabricated as a single unit of expanded polystyrene foam coated in glass fiber reinforced concrete, with all required wall anchors, electrical, mechanical and plumbing systems pre-installed. The chassis module is shipped whole from factory to site, via standard flat bed trailer.The piers that anchor the house to the ground and the concrete pads on which the chassis sits are constructed on-site, using local labor and conventional construction techniques.The panelized walls, windows, interior finishes and kit-of parts roof are prefabricated, to be assembled on-site along with the installation of fixtures and appliances. This efficient approach integrates modern mass-production with traditional site construction to lower costs, guarantee quality, and reduce waste.Make It: Affordable

Page 51: Mitigation strategies for flooding pdf

www.archdaily.com Floating House, New Orlean

Make It: Float

A flood-safe house that securely floats with rising water levels.The FLOAT House prototype proposes a sustainable way of living that adapts to this uncertain reality.To protect from flooding, the FLOAT House can rise vertically on guide posts, securely floating up to twelve feet as water levels rise. In the event of a flood, the house’s chassis acts as a raft, guided by steel masts, which are anchored to the ground by two concrete pile caps each with six 45-foot deep piles.FLOAT House sits on a 4-foot base; rather than permanently raising the house on ten foot or higher stilts, the house only rises in case of severe flooding. This configuration accommodates a traditional front porch, preserving of the community’s vital porch culture and facilitating accessibility for elderly and disabled residents.While not designed for occupants to remain in the home during a hurricane, the FLOAT House aims to minimize catastrophic damage and preserve the homeowner’s investment in their property.

Page 52: Mitigation strategies for flooding pdf

www.archdaily.com Floating House, New Orlean

Make It: Green

Solar Power Generation: The roof supports solar panels that generate all of the house’s power, resulting in net-zero annual energy consumption. The chassis incorporates electrical systems to store and convert solar power for daily use, and to give back to the electrical grid during the temperate fall and spring months.Rainwater Collection: The sloped concave roof collects rainwater, and funnels it to cisterns housed in the chassis, where it is filtered and stored for daily use.Efficient Systems—including low-flow plumbing fixtures, low-energy appliances, high performance windows, and highly insulated SIPs (Structural Insulated Panel) walls and roof—minimize water and power consumption, and lower the lifecycle cost for the home owner.High-grade energy efficient kitchen, appliances and fixtures maximize durability and reduce the need for replacement.Geothermal Heating and Cooling: A geothermal mechanical system heats and cools the air via a ground source heat pump, which naturally conditions the air, minimizing the energy required to cool the house in the harsh summer months and heat it in winter.

Page 53: Mitigation strategies for flooding pdf

www.dezeen.com

Amphibious House, UK

The lightweight timber-framed structure is fairly traditional in its form, but sits inside an excavated "wet dock" made from steel sheet piling with a mesh base to allow water to enter and escape naturally. Clad in zinc shingles with glazed gables, this structure is independent of the house, which has a foundation of waterproofed concrete that wraps around the lower ground floor, acting like the hull of a ship.

Project Credits:Project Architect: Richard CouttsDesign Team: Baca Architects: Robert Barker, Riccardo Pellizzon, Robert PattisonStructural Engineer: TechnikerHydrological Engineer: HR Wallingfords

Amphibious House, UK

Page 54: Mitigation strategies for flooding pdf

www.dezeen.com

Amphibious House, UK

Amphibious House, UK

The garden design incorporates terraces that act as an "early warning system" for flooding

Page 55: Mitigation strategies for flooding pdf

Floating Houses

Need of Floating Houses in IndiaIndia has a huge coastal area as well as large flood prone areas like Bihar, Assam and in many other states where almost every year, public face difficulty due to floods and loss of lives and property takes place. In case, the principle of construction of floating houses is adopted in which the houses would rise during floods and subside down during dry conditions, loss of lives and property can be avoided. Simple techniques based on telescopic arrangements should be designed for requirements. Therefore, research and development can be taken up as model projects for developing such designs.In the starting, life line buildings in the flood prone areas can be constructed with such techniques. These buildings will function even during period when they remain cut off due to floods and have no external electricity and water.In the islands and coastal areas, such houses will certainly be adopted sooner or later and thus Indian architects and designers should start getting expertise in this field to design such houses.Floating houses can also be built for tourists who would love to stay in such houses and India can generate considerable revenue from the same.

Page 56: Mitigation strategies for flooding pdf

Floating Houses

Basic Principle of ConstructionGenerally there are two basic principles for making floating houses. First is the pontoon principle in which one makes a solid platform, lighter than the water and the other based on the ship in which a hollow concrete box is created which is open on the top. The pontoon principle has the benefit of its use in shallow water, compared to the hollow concrete box while the concrete box has the benefit of higher space utilization within as a part of the building. Both type of floating houses are connected with a flexible connection to the quay, so the houses can rise with the water when the tide changes. When needed the floating system can be moved elsewhere at short notice without leaving any scar to the environment. Instead a new house can be placed in to the old situation which makes it the most sustainable and durable way to build.

Page 57: Mitigation strategies for flooding pdf

Floating Houses

Providing services in a floating house is a challenge which includes water supply, electricity and toilets. Therefore, green building concept has to be followed in the floating houses which use non conventional resources for energy, make use of waste products, and recycles the water. Net zero energy buildings are more useful as they do not require additional energy from external source and total energy demand is met from on site generation power. Normally solar panels are provided for the energy requirements. Due to aesthetic requirements as well energy efficiency, roof garden is also becoming popular. Other measures like incinolet toilets to burn waste, geothermal pond loops into the floor, and filtration unit for drinking water collected from rainstorms.

Services

Page 58: Mitigation strategies for flooding pdf

Water Gate flood wall is designed to contain & stop heavy water flow due to severe flooding.Water gates are quick & easy to deploy to prevent heavy flood water from reaching the propertyQuick Dam water gate is self rising flood barrier that is quick & easy to use to contain large flood waters

Water Gates

https://www.youtube.com/watch?v=CklYj_oda8M

Advanced Technology: Flood Barrier

Page 59: Mitigation strategies for flooding pdf

My Innovations

Based on the Principle, the Floating house is design to mitigate Flooding Crisis which has become important now a days. The base of house is fixed on an empty compressed cushion of polyurethane. The cushion has percolations in front to allow flood water in. It will start floating when filled with water. At the same time the level of house will start going above Base Flood Elevation of water which will help to avoid damage & decay of house.

Floating shoes are designed with an amphibious character.They can be used on ground as well as on water.They can be used as normal shoes on ground while walking.When they get in contact with water, water will get filled into the polyurethane compartment assembled between upper & lower rubber soal on which shoes is attached.Water will enter through percolation on edge of shoes making the polyurethane assembly filled with water. As a result shoes will start uplifting & it will start floating on water. One can float on water with the help of sticks or any similar gadget.

Page 60: Mitigation strategies for flooding pdf

References1. Flood Resistance of the Building Envelope by Christopher P. Jones, PE

2. Free of Obstructions, Technical Bulletin5 Federal Emergency Management Agency, USA

3. HOMEOWNER’S GUIDE FOR FLOOD, DEBRIS, AND EROSION CONTROL RIVERSIDE FIRE DEPARTMENT, OFFICE OF EMERGENCY MANAGEMENT GUIDED BY PWD, LOS ANGELES

4. www.climatetechwiki.org/content/flood-proofing

5. Matthew M. Linham, University of Southampton Robert J. Nicholls, University of Southampton6. www.smartec.ch

7. www.livescience.com

8. Resilient New Orleans

9. Strategic actions to shape our future city10. www.archdaily.com

11. www.dezeen.com

12. Paradigm Shifts in Monitoring Levees and Earthen Dams Distributed Fiber Optic Monitoring Systems,Daniele Inaudi , Joseph Church

Page 61: Mitigation strategies for flooding pdf

BY

Dhanashri Mirajkar Roll No. 609110

M. Arch. 3rd Semester-2016-17

An exposition onMITIGATION STRATEGIES FOR FLOODING