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1. Title

Stilt house Building Technology for Flood Disaster Reduction in Flood-prone Areas

ID: DRH 16 Newly built concrete house in water-logging areas in Dongting Lake Area of Hunan Province.
Hazard: Storm surge , Flood , Flash flood
Category:

Transferable indigenous knowledge (TIK)

Proposer: Weihua FANG
Country: CHINA;
Date posted: 06 February 2008
Date published: 01 February 2009
Copyright © 2009 Weihua FANG (proposer). All rights reserved.

Newly built concrete house in water-logging areas in Dongting Lake Area of Hunan Province.

Contact

Dr. Weihua Fang (Associate Professor of the Academy of Disaster Reduction and Emergency Management, Beijing Normal University) and Fei HE
Academy of Disaster Reduction and Emergency Management, Beijing Normal University
No.19, Xinjiekouwai Street, Bejing 100875, China.
E-mails: fang@ires.cn
Tel: +86-10-58802283
Fax: +86-10-58802158

2. Major significance / Summary

Flood is a major threat to lives and properties in the riparian and coastal regions. The stilt Flood is a major threat to lives and properties in the riparian and coastal regions. The stilt house building technology, an indigenous knowledge in West Hunan Province, China, has been verified by its history of more than 1,000 years. It has also been developed into new forms and applied in modern concrete buildings.

3. Keywords

Stilt house, building technology, flood risk reduction


II. Categories

4. Focus of this information

Transferable indigenous knowledge (TIK)

5. Users

5-1. Anticipated users: Administrative officers , National governments and other intermediate government bodies (state, prefecture, district, etc.) , NGO/NPO project managers and staff , Experts , Architects and engineers , Rural planners

5-2. Other users: Local residents

6. Hazards focused

Storm surge , Flood , Flash flood

7. Elements at risk

Human lives , Buildings , Rural areas , Coastal areas


III. Contact Information

8. Proposer(s) information (Writer of this template)

Dr. Weihua Fang (Associate Professor of the Academy of Disaster Reduction and Emergency Management, Beijing Normal University) and Fei HE
Academy of Disaster Reduction and Emergency Management, Beijing Normal University
No.19, Xinjiekouwai Street, Bejing 100875, China.
E-mails: fang@ires.cn
Tel: +86-10-58802283
Fax: +86-10-58802158

9. Country(ies)/region(s) where the technology/knowledge/practice originated

CHINA;

10. Names and institutions of technology/knowledge developers

11. Title of relevant projects if any

12. References and publications

13. Note on ownership if any

Free use.


IV. Background

14. Disaster events and/or societal circumstances, which became the driving force either for developing the technology/knowledge or enhancing its practice

People live in low-lying flood-prone areas for many reasons: history, tradition, livelihood, social status etc. To fight with flood, the major threat to their lives and properties, residents in such areas were forced to develop the unique stilt building technology so as to raise their houses to a higher and safer level while leaving spaces for flood flowing through.


V. Description

15. Feature and attribute

The mechanism of stilt house building technology is simple: raise the house to a higher level and leave spaces for flood flowing through. 
Design and build using the following approaches:
ü  keep them from blowing away
ü  keep the rain out
ü  elevate the structures
ü  build with materials that can get wet
ü  build with materials that can get wet design assemblies to easily dry when they get wet

Wooden stilt house along the riverside with hundreds of years of history in Fenghuang County of Hunan Province of China 
Fig.1 Wooden stilt house along the riverside with hundreds of years of history in Fenghuang County of Hunan Province of China

 

Reconstruction of normal buildings built in around 20 years ago, to stilt concrete house in Xiangjiang River basin of Hunan Province of China 
Fig.2 Reconstruction of normal buildings built in around 20 years ago, to stilt concrete house in Xiangjiang River basin of Hunan Province of China

Newly built concrete house in water-logging areas in Dongting Lake Area of Hunan Province
Fig. 3 Newly built concrete house in water-logging areas in Dongting Lake Area of Hunan Province

New home in Florida Panhandle of the U.S.A
Fig.4 New home in Florida Panhandle of the U.S.A

 

16. Necessary process to implement

First, knowledge of the highest historical water level should be acquired, through indigenous knowledge or scientific analyses, thus to determine the height of the stilts to be built;

Second, characteristic relating to floods should also be taken into consideration, such as flow direction, lasting time etc;Third, proper building technologies should be chosen according to availability of building materials and characteristics of local terrain;

Finally, the stilts must be strong enough to withstand both the weight of the house and strike of flood waves.

17. Strength and limitations

The use of stilt house building technology can effectively reduce flood or water-logging risk.?A possible limitation is that this kind of technology may not be suitable for regions where erosion is severe or ground is unstable. Moreover, the stilts must be strong enough.

?

18. Lessons learned through implementation if any

For houses built along the river, cylinder stilts will produce much less resistance against water flow and thus are more stable. While for houses built in areas where water flow is slower, square stilts have the advantage of easy constructing.


VI. Resources required

19. Facilities and equipments required

Common building equipments.

20. Costs, organization, manpower, etc.

Costs of stilt houses vary according to the material used and number of floors to be built. Cost of a brick-concrete stilt building , usually two to three floors, is between 5,000 and 4,0000 RMB (about 600 to 5,000 US Dollars); The time of building such a house is generally one to two months, with manpower of about twenty to thirty.


VII. Message from the proposer if any

21. Message


VIII. Self evaluation in relation to applicability

22. How do you evaluate the technology/knowledge that you have proposed?

It is a technology/knowledge that has high application potential verified by implementation in various field sites.

23. Notes on the applicability if any


IX. Application examples

No.1

    E1-1. Project name if available

    Stilt Wooden Houses in West Hunan Province, China


    E1-2. Place

    Fenghuang County, Zhangjiajie, Hunan Province, China


    E1-3. Year

    About 1000 yrs ago


    E1-4. Investor


    E1-5. People involved

    Local residents


    E1-6. Monetary costs incurred

    The cost of a two store wooden house is about 20,000 RMB ( in average) Building materials: 10,000 Fitment materials: 3,000 Wage for workers: 7,000


    E1-7. Total workload required

    About ten manpowers need to work for one month to complete a two to three floor stilt wooden house.


    E1-8. Evidence of positive result

    Tangible


No.2

    E2-1. Project name if available

    New stilt house in the Dongting Lake region


    E2-2. Place

    Wangcheng County, Hunan Province, China


    E2-3. Year

    1998 ?


    E2-4. Investor


    E2-5. People involved

    Local residents


    E2-6. Monetary costs incurred

    The cost of a two store building is about 30,000 RMB (in average). Building materials: 15,000 Fitment materials: 5,000 Wage for workers: 10,000


    E2-7. Total workload required

    About ten to fifteen manpowers need to work for one or two months to complete a two to three floor stilt brick-concrete house.


    E2-8. Evidence of positive result

    Tangible



X. Other related parallel initiatives if any

Message


XI. Remarks for version upgrade

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