More than 60 people from 14 countries participated in the International RCC Dams Seminar and Study Tour (RCC 2007), March 18 to 23 in the U.S. state of Georgia.
At the seminar, 17 speakers from Australia, Canada, Germany, Spain, and the U.S. presented lessons learned from past performance and state-of-the-art in the design and construction of roller-compacted concrete (RCC). RCC dams are being built as high as nearly 650 feet, with most of these high RCC dams being located in southeast Asia. Shear resistance and direct tensile strength at lift lines continue to be the major item to be solved in the design of high RCC dams.
Seminar attendees visited several RCC projects, including:
- Hickory Log Creek Dam, which is currently under construction to provide additional water supply for two Atlanta, Georgia, suburbs. At a final height of 188 feet, the gravity dam is the tallest RCC dam under construction in the U.S. Hickory Log Creek Dam is the only RCC dam in the U.S. with crest gates.
- Big Haynes Dam, which was completed in 1995 to supply water to an Atlanta suburb. This dam used an exposed lean RCC mixture, and the spillway was constructed using precast concrete column sections anchored back into the RCC.
- Two RCC overtopping protection projects on the Yellow River. For Y14, formed steps of exposed RCC were placed on the downstream slope of the embankment and adjacent to each abutment. For Y17, overlay RCC on all areas except the dam crest was covered with top soil and planted with grass.
More than 60 engineers from 14 countries took part in the International RCC Dams Seminar and Study Tour, which included visits to four roller-compacted-concrete dams.
The seminar was sponsored by Schnabel Engineering in conjunction with the Association of State Dam Safety Officials. The conference is held every other year.
IHA engages consultant to investigate climate change
Andrew Scanlon of Hydro Tasmania in Australia is working on assignment to the International Hydropower Association (IHA) through September 2007 as a climate change consultant. Scanlon is working on a variety of projects, including:
- Examining issues with potential adoption by national governments of the Intergovernmental Panel on Climate Change’s Guidelines for National Greenhouse Gas Inventories;
- Reviewing the United Nations Framework Convention on Climate Change’s clean development mechanism and joint implementation rules for hydropower, which currently exclude most hydro facilities that store water; and
- Representating IHA in the ongoing United Nations Educational, Scientific and Cultural Organization forum on greenhouse gas emissions from freshwater reservoirs.
Online course available to assess social effects of hydro
The International Centre for Hydropower (ICH) in Norway offers an Internet-based course, “The Process of Social Impact Assessment.” This training program helps developers of water resources, particularly hydro projects, learn how to assess and manage social effects of a development.
The course consists of 13 modules covering a variety of topics, including: impact assessment methodologies; baseline data and mitigation measures; stakeholder consultation; resettlement; financing and budget issues; health issues; monitoring and non-governmental organizations (NGOs); and environmental and technical issues.
The course costs NOK 8,000 (US$1,300) and begins each year in August. The course is applicable to management personnel from power companies, ministries, directorates, public agencies, private sector enterprises, engineering and consulting firms, and NGOs.
For more information or to register for the course, visit the ICH website at www.ich.no and click on “SIA2004” at left.
Greg Stone elected to board
Greg Stone, PhD, vice president of business development at Iris Power L.P., is serving on the Council Board of the International Electrotechnical Commission (IEC). IEC is the world’s primary standards body for electrical and electronic products and systems.
The Council Board serves as the board of directors for the IEC. Dr. Stone is serving a three-year term as one of 15 board members.
Dr. Stone has been involved with creation of motor and generator standards with IEC since 1980. He also has been active in creating rotating machine standards for the Institute of Electrical and Electronics Engineers, Inc. (IEEE).
Dr. Stone was one of the founders of Iris Power, a manufacturer of on-line test equipment for large motors and generators, located in Toronto, Ontario, Canada.
ICOLD Forum: Remote sensing for water quality
The quality of the water in reservoirs impounded by dams can be determined through monitoring studies. If needed, the dam owner can then implement measures for improvement. However, because of the large surface area of water behind a dam, monitoring studies may require considerable human labor.
Remote sensing technology, using satellites, can be used to efficiently collect water quality data over a large area. Although the numerical precision of this technology is inferior to samples taken directly from the water body, it allows for comparison of past and newly observed data. This comparison can be used to measure changes in water quality.
The International Commission on Large Dams (ICOLD) offers a technical bulletin and CD-Rom on the topic of using remote sensing to manage water quality in a reservoir. Bulletin 127, Remote Sensing for Reservoir Water Quality Management Examples of Initiatives, was prepared by the Japanese Commission on Large Dams, with assistance from the U.S. Society on Dams.
The bulletin and CD-Rom document the results of a three-year study of remote sensing at the two largest water bodies in Japan: Lake Biwa and Lake Kasumigaura. Lake Biwa has a surface area of 672 square kilometers. Water quality problems include algae blooms, red tides, and the negative smell of the city water. Lake Kasumigaura has a surface area of 220 square kilometers but is very shallow, with a maximum depth of only 7 meters. Algae blooms are common, and people are displeased by the abnormal smell of the water.
The 89-page bulletin summarizes major findings of the Japanese study and gives readers an introduction to the capabilities of remote sensing for better planning and operating water projects to achieve water quality goals. The full report, available on the accompanying CD-Rom, gives a detailed account of the results of the study. To order this bulletin and CD-Rom for 31 euros (US$41), visit www.icold-cigb.org and click on Publications, then Bulletins.
ICOLD is a nongovernmental organization that provides a forum for the exchange of knowledge and experience in dam engineering. To learn more about ICOLD activities, contact Michel De Vivo, Secretary-General, ICOLD 151, Bd Haussmann, Paris 75008 France; (33) 1-40426824; E-mail: secretaire. [email protected]
HydroVision 2008 announces call for paper abstracts
HCI Publications, organizer of the HydroVision 2008 international hydropower conference and exhibition, is accepting abstracts for the Technical Papers program. The conference will be held July 14-18, 2008, in Sacramento, California, United States.
Abstracts are requested on all topics of interest to technical professionals in the hydropower field. Prefer- ence will be given to abstracts that focus on innovative, practical, and proven technologies and methods.
Abstracts that describe the focus and content of proposed papers (maximum of 400 words) are due September 4, 2007. Submit abstracts through the Internet at: www. hcipub. com/hydrovision/abstracts/asp.
All abstracts submitted will be reviewed by the conference Technical Committee. If accepted, authors will be invited to submit a paper by February 15, 2008, for inclusion in the official conference publication (in CD-Rom format) that will be distributed to all conference delegates.
For more information, contact (1) 816-931-1311 or E-mail: [email protected].