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Research Paper | Water Management | Laos | Volume 12 Issue 5, May 2023
Factors Caused Floods in Lahanam Village and Thakhamlieng Village, Savannakhet Province
Keo oudone Phetdavong | Somphone Inkhamseng  | Keophet Phoumphone
Abstract: To better understand the factors that cause flooding in Lahanam and Thakhamlien villages, Song Khone District, Savannakhet Province, the maximum daily rainfall at Lahanam Station (Song Khone District), Keng Kok Station (Champhone District) and Seno Station (Outhumphone District) Savannakhet Province was collected, followed by statistical analysis of data from 1999 to 2019. As a result of the analysis, the maximum daily rainfall of Lahanam station variesat104.65, 129.44, 144.97, 163.84, 177.46, 190.81, and 204.00 mm/day with the return period of 2, 5, 10, 25, 50, 100 and 200 years, respectively. Besides this, the maximum value of flood water was also calculated by using a formula and program analysis. The results of the calculation of Lahanam station vary at 300.3, 407.6, 496.9, 621.5, 741.7, and 879.5 cubic meters/second with the return period of 2, 5, 10, 25, 50, 100, and 200 years, respectively. In addition, the topography of the villages in the study area and nearby villages a total of 7 villages were investigated and it was found that the level of the area of Lahanam and Thakham Lien villages, which is a regular village affected by floods is 101 to 138 meters, the level of residential area is 121 to 130 meters and the level of the river bank is 119 to 126 meters compared to the average sea level. When there is a heavy rain event or a storm, the water flows over the bank and causes widespread flooding, especially in Lahanam village because it is a relatively flat area and their houses are located near the river bank and adjacent to 3 rivers (Se Bang Hieng, Se Sam soy, and Se Champhon).
Keywords: rainfall, flood, storm, typhoon
Edition: Volume 12 Issue 5, May 2023,
Pages: 255 - 262