Long-term Hydrological Observations in a Lowland Dry Evergreen Forest Catchment Area of the Lower Mekong River, Cambodia

作者：Naoki Kabeya, Akira Shimizu, Takanori Shimizu, S. Iida, Koji Tamai, Asako Miyamoto, Sophal Chann, Makoto Araki, Yasuhiro Ohnuki · 发表于：Japan Agricultural Research Quarterly JARQ · 年份：2021 · DOI：10.6090/jarq.55.177 · 被引用次数：8 · 研究领域：Hydrology and Watershed Management Studies、Flood Risk Assessment and Management、Hydrology and Drought Analysis

Long-term field observation was clarified over ten years for the water budget of Cambodia’s forest watershed, one of the world’s most data-sparce areas. The La Niña years had large amounts of annual rainfall exceeding 1,800 mm, often marked by monsoon breaks during the rainy season. The El Niño years had smaller amounts of annual rainfall between 1,100 mm and 1,200 mm, aside from that in 2016. The strong El Niño during 2015-2016 caused large drops in both river and groundwater levels in the Cambodian forest catchment. However, the former levels of groundwater and river water were restored by 953.4 mm of rain received during the second half of the rainy season in 2016. Thus, the monsoon breaks may be correlated with the increased amount of rainfall in the second half of the rainy season.