Tonle Sap Lake is the largest lake linked with Mekong River. The variations of water level and area exert vital impact on the structure and function of Tonle Sap Lake. Identifying the evolvement rule of water level and area is of guiding significance for flood control and drought relief as well as eco-environmental protection in Tonle Sap Lake and the Mekong Delta. According to long series of daily water level data of Phnom Penh Port, Prek Kdam and Kampong Luong stations and topographic data of lake area, we analyzed the inter-annual and annual variations of water level and area of Tonle Sap Lake. Results reveal that the water level of Tonle Sap Lake raise and fell slowly, with the rising duration shorter than falling duration and rising rate higher than falling rate. The water level of Tonle Sap Lake fluctuated frequently between years, with the annual average water level, annual maximum water level, annual water level range, annual flood duration, annual average flood level and daily rising rate all showing slight downward trend, while the annual lowest water level, water withdrawal days and daily falling rate showing upward trend. The annual water level and area of Tonle Sap Lake changed with a single peak value. The lowest water level was in May, when the average water level was 1.51 m and the corresponding area 2 487 km2, the measured minimum water level 1.11 m and the corresponding area 2 053 km2; the water level reached the maximum value in October, when the average water level was 8.70 m and the corresponding area 12 768 km2, the measured maximum water level 10.54 m and the corresponding area 15 261 km2. Multi-year average water level range of Tonle Sap Lake was 7.63 m and the corresponding area range was 10 628 km2.
Key words
water level /
area /
variation characteristics /
ecological environment /
Tonle Sap Lake
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References
[1] 长江水利委员会.柬埔寨国家水资源综合规划纲要[R].武汉:长江水利委员会,2018.
[2] National Institute of Statistics of Combodia. Cambodia Inter-censal Population Survey 2014 Final Report[R]. Phnom Penh: National Institute of Statistics of Cambodia, 2014.
[3] MAK S, PHENG S, KHUON K, et al. Profile of the Sub-area Stung Treng (SA-6C)[R]. Phnom Penh: Cambodia National Mekong Committee, 2012.
[4] Mekong River Commission. Flood Situation Report 2011[R]. Phnom Penh: Mekong River Commission, 2011.
[5] SMITH L C, SHENG Y, MACDONALD G M, et al. Disappearing Arctic Lakes[J]. Science, 2005, 308(5727): 1429.
[6] BENSON L V, PAILLET F L. The Use of Total Lake Surface Area As An Indicator of Climatic Change: Examples From the Lahontan Basin[J]. Quaternary Research, 1989, 32(3): 262-275.
[7] ALSDORF D E, MELACK J M, DUNNE T, et al. Interferometric Radar Measurements of Water Level Changes on the Amazon Flood Plain[J]. Nature, 2000, 404: 174-177.
[8] COOPS H, BEKLIOGLU M, CRISMAN T L. The Role of Water-Level Fluctuations in Shallow Lake Ecosystems—Workshop Conclusions[J]. Hydrobiologia, 2003, 506/509: 23-27.
[9] LEIRA M, CANTONATI M. Effects of Water Level Fluctuations on Lakes: An Annotated Bibliography[J]. Hydrobiologia, 2008, 613: 171-184.
[10]KUMMU M, SARKKULA J. Impact of the Mekong River Flow Alteration on the Tonle Sap Flood Pulse[J]. Ambio, 2008, 37(3): 174-181.
[11]李昌文,游中琼,要 威,等. 湄公河与洞里萨湖河湖水量交换的水文条件研究[C]∥中国水利学会2018学术年会一带一路·走出去论文集.武汉:长江出版社,2018: 166-174.
[12]李昌文,游中琼,要 威.洞里萨湖调蓄洪水作用研究[C]∥中国水利学会2018学术年会论文集:第三分册.北京:中国水利水电出版社,2018:351-355.
[13]LAMBERTS D, KOPONEN J. Flood Pulse Alterations and Productivity of the Tonle Sap Ecosystem: A Model for Impact Assessment[J]. Ambio, 2008, 37(3): 168-173.
[14]Department of Forest and Wildlife of Cambodia. Forest Resource Assessment in Cambodia[R]. Phnom Penh: Department of Forest and Wildlife of Cambodia, 1997.
[15]长江勘测规划设计研究院.长江与鄱阳湖关系的变化与影响研究[R].武汉:长江勘测规划设计研究院,2015.
[16]游中琼,余启辉,徐照明.鄱阳湖区综合治理规划[C]∥中国水利学会2013年学术年会论文集.广州:中国水利学会, 2013:799-803.
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