TEAM Consulting Engineering and Management Co.

Bangkok, Thailand

TEAM Consulting Engineering and Management Co.

Bangkok, Thailand

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Wongwises P.,King Mongkut's University of Technology Thonburi | Vongvisessomjai S.,Team Consulting Engineering and Management Co. | Lueangaram W.,Royal Thai Navy
American Journal of Environmental Sciences | Year: 2010

Problem statement: A two-dimensional wave prediction model along the best track of Typhoon Linda 1997 was interested to study the impact of typhoon wind-wave characteristics. The dynamical wave model with deep water condition was used to predict the wave height (Hs) of Typhoon Linda before and after entering into the Gulf of Thailand (GoT). Approach: The standard one-way nested grid for a regional scale of the third generation WAve Model Cycle 4 (WAMC4) is scrutinized in the present study. This model is enabled to solve the spectral energy balance equation on a coarse resolution grid in order to produce boundary conditions for a small area by the nested grid technique along the best track of typhoon. The model takes full advantage of the fine resolution wind fields in space and time produced by the available US Navy Operational Global Atmospheric Prediction System (NOGAPS) model with 1° resolution. The nested grid application was developed in order to gradually increase the resolution from the open ocean towards the South China Sea (SCS) and the Gulf of Thailand (GoT) respectively. Results: The model results were predicted at five stations which were before and during the typhoon entering into the GoT. The wind speeds of the stations 1-5 were in ranges of 5.14-29.81, 4.11-28.27, 0.51-24.67, 0.51-31.35 and 0.51-33.41 m sec-1, respectively. While the Hs of these stations were found in ranges of 0.54-2.99, 0.68-2.85, 0.11-1.57, 0.12-2.92 and 0.09-2.76 m, respectively. The model results were compared with buoy observations at Ko-Chang and Rayong locations in the GoT which were obtained from the Seawatch project. The comparison of those results at Ko-Chang and Rayong showed the percentage errors of 11.20 and 15.12% respectively. Conclusion: The model results presented the relationship of typhoon wind-induced ocean wave at five stations along the best track. The tendency of the Hs from the model in the spherical coordinate propagation with deep water condition in the fine grid domain was in good agreement with the Hs from the observations. © 2010 Science Publications.


Ekphisutsuntorn P.,Kasetsart University | Wongwises P.,Chulalongkorn University | Chinnarasri C.,King Mongkut's University of Technology Thonburi | Humphries U.,Prince of Songkla University | Vongvisessomjai S.,TEAM Consulting Engineering and Management Co.
World Academy of Science, Engineering and Technology | Year: 2010

In this paper, the significant wave height at the Upper Gulf of Thailand and the changing of wave height at Bangkhuntien shoreline were simulated by using the Simulating WAves Nearshore Model (SWAN) version 40.51. The simulated results indicated that the significant wave height by SWAN model corresponded with the observed data. The results showed that the maximum significant wave height at the Bangkhuntien shoreline were 1.06-2.05 m. and the average significant wave height at the Bangkhuntien shoreline were 0.30-0.47 m. The significant wave height can be used to calculate the erosion through the Bangkhuntien shoreline. The erosion rates at the Bangkhuntien shoreline were prepared by using the aerial photo and they were about 1.80 m/yr. from 1980-1986, 4.75 m/yr from 1987-1993, 15.28 m/yr from 1994-1996 and 10.03 m/yr from 1997-2002. The relation between the wave energy and the erosion were in good agreement. Therefore, the significant wave height was one of the major factors of the erosion at the Bangkhuntien shoreline.


Ekphisutsuntorn P.,King Mongkut's University of Technology Thonburi | Wongwises P.,King Mongkut's University of Technology Thonburi | Zhu J.,CAS Institute of Physics | Vongvisessomjai S.,Team Consulting Engineering and Management Co.
American Journal of Environmental Sciences | Year: 2010

Problem statement: In this study, the changing of wave height at Bangkhuntien during a passage of typhoon LINDA was simulated by using the Simulating WAves Nearshore Model (SWAN) version 40.41. The study domain covered from 99-101°E longitude and 12-14°N in latitude with resolution of 2.4×2.4 km. The simulation covered 10 days during typhoon LINDA entering into the Upper Gulf of Thailand. The wave height and its changing through the Bangkhuntien shoreline were simulated. The simulated significant wave height by the SWAN model at Petchburi and Ko Srichang buoy stations were compared with the observed significant wave height at these stations for the model verification. Approach: The significant wave height at Bangkhuntien shoreline during a passage of typhoon LINDA was simulated. Results: The results indicated that the significant wave height simulated by SWAN model were in good agreement with the observed data. The average simulated significant wave height at Bangkhuntien shoreline was 0.36 m and the significant wave height was in a range of 0.1-0.5 m. before typhoon LINDA entering into the Upper Gulf of Thailand. The significant wave height increased to 2.16, 2.22 and 1.66 m at 26, 18 and 5.7 m sea water depth respectively at the Bangkhuntien shoreline during typhoon LINDA passed. Conclusion: The findings of this study could be useful for the rising wave height, erosive calculation, shoreline protection and coastal zone management when typhoons passed through the Upper Gulf of Thailand. © 2010 Science Publications.


Ekphisutsuntorn P.,King Mongkut's University of Technology Thonburi | Wongwises P.,King Mongkut's University of Technology Thonburi | Chinnarasri C.,King Mongkut's University of Technology Thonburi | Vongvisessomjais S.,Team Consulting Engineering and Management Co. | Zhu J.,CAS Institute of Physics
American Journal of Environmental Sciences | Year: 2010

Problem statement: In this study, the significant wave height at the Upper Gulf of Thailand and the change of wave height at Bangkhuntien shoreline were simulated by using the Simulating WAves Nearshore Model (SWAN) version 40.51. Approach: The simulated significant wave height by the SWAN model at Petchburi buoy station and Ko Srichang buoy station were compared with the observed significant wave height at these stations for the model verification. The significant wave height by the SWAN model at Bangkhuntien shoreline from 1981-2004 were simulated. Results: The simulated results show that the maximum significant wave height at Bangkhuntien shoreline was in a range of 0.95-2.05 m while the average maximum significant wave height was 1.47 m. The average significant wave height were in a range of 0.29-0.48 m while the average significant wave height of 21 years simulated data at Bangkhuntien shoreline was 0.35 m. Conclusion: The findings of this study could be useful for the erosive calculation, shoreline protection and coastal zone management activities & copy; 2010 Science Publications.


Wannawong W.,Srinakharinwirot University | Humphries U.W.,Prince of Songkla University | Wongwises P.,Chulalongkorn University | Vongvisessomjai S.,TEAM Consulting Engineering and Management Co. | Lueangaram W.,Numerical Weather Prediction Center
World Academy of Science, Engineering and Technology | Year: 2010

A numerical analysis of wave and hydrodynamic models is used to investigate the influence of WAve and Storm Surge (WASS) in the regional and coastal zones. The numerical analyzed system consists of the WAve Model Cycle 4 (WAMC4) and the Princeton Ocean Model (POM) which used to solve the energy balance and primitive equations respectively. The results of both models presented the incorporated surface wave in the regional zone affected the coastal storm surge zone. Specifically, the results indicated that the WASS generally under the approximation is not only the peak surge but also the coastal water level drop which can also cause substantial impact on the coastal environment. The wave-induced surface stress affected the storm surge can significantly improve storm surge prediction. Finally, the calibration of wave module according to the minimum error of the significant wave height (Hs) is not necessarily result in the optimum wave module in the WASS analyzed system for the WASS prediction.


Perret S.-R.,CIRAD - Agricultural Research for Development | Saringkarn P.,TEAM Consulting Engineering and Management Co. | Jourdain D.,CIRAD - Agricultural Research for Development | Babel M.S.,Asian Institute of Technology
Cahiers Agricultures | Year: 2013

Thailand is spending massive budgets in development and maintenance of irrigation systems for rice production. Along with tighter budgets and the ever-decreasing weight of agriculture in the domestic economy, debates are becoming more intense on the need for alternative, internalized modes of financing irrigation water supply, including farmertargeted charging systems. This article investigates the correlation between the use value of irrigation water and the costs incurred by water supply, on a case study basis, in order to assess the feasibility of charging farmers for such costs. Climatic and production uncertainty was subject to sensitivity analysis (Monte Carlo). Analyses show that the use value (0.35THB/m3 [1 Thai Baht = 0.03 US$]) exceeds total costs (0.1 THB/m3), meaning that farmers could theoretically pay for irrigation water supply. However, results were obtained under favourable production conditions. Furthermore, if farmers were to cover the total cost of irrigation, including capital costs (2,208 THB/ha/season), production costs would then increase by approximately 36% in both seasons. Also, farmers would lose approximately 36% of their net income as water charge in the wet season and 25% in the dry season. If farmers were to pay for operation and maintenance costs only (1,403 THB/ha in both seasons), production costs would then increase by approximately 23%. In view of their low income, charging farmers is not feasible or acceptable. Besides, the study notes that farmers already pay pumping costs at field level, and are well aware of the value of water. This article further discusses alternative charging options, on a broader basis. A charging system spread throughout the rice chain, down to milling, retail, and export segments, proves to be acceptable; it may even include farmers, at low cost for them, and reinstate their status and active participation in the chain. The article also suggests that a broader ecosystem services approach may be used.


Naparaxawong K.,TEAM Consulting Engineering and Management Co. | Vibulsirikul P.,TEAM Consulting Engineering and Management Co.
International Journal on Hydropower and Dams | Year: 2012

Changes introduced in the flow regime downstream of the Ham Ngum river resulting from existing and predicted future water resources development in the basin are evaluated. The Nam Ngum river basin (NNRB) is one of the most significant river basins in Lao PDR in terms of population, economic activity, water resources, and water resource development. Flow and water level data are available for the Nam Ngum river at Ban Na Luang upstream of Nam Ngum 1, and downstream of Nam Ngum 1 below the Nam Lik confluence at Ban Pakkangoung. Data are available for the Nam Song river at Vang Vieng and Nam Lik below the Nam Song confluence at Ban Hin Heup. An additional four dams are at various stages of development, ranging from planning to construction. They are all expected to be completed within the next five years, creating a total storage volume of 15 700 × 10 6 m 3, power generation capacity of 1700 MW, and average production of 7300 GWh/year.

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