Bài viết này sử dụng phương pháp thu thập và phân tích dữ liệu để so sánh diễn biến chất lượng nước sông Đà trước và sau khi ngăn đập trở thành lòng hồ thủy điện Sơn La tại 03 vị trí quan trắc: cầu Hang Tôm (Mường Lay, Điện Biên), cầu Pá Uôn, (Quỳnh Nhai, Sơn La), thượng lưu đập Mường La (Sơn La). | Diễn biến chất lượng nước hồ thủy điện Sơn La từ dữ liệu quan trắc môi trường (2010-2018) VNU Journal of Science: Earth and Environmental Sciences, Vol. 35, No. 3 (2019) 1-21 Original Article The Evolutions for Water Quality of Son La Hydropower Reservoir from Environmental Monitoring Data (2010 - 2018) Do Xuan Duc1, , Luu Duc Hai2, Do Huu Tuan2 1Tay Bac University, Quyet Tam Wards, Son La City, Son La Province, Vietnam 2VNU University of Science, 334 Nguyen Trai, Hanoi, Vietnam Received 16 August 2018 Revised 08 December 2018; Accepted 26 July 2019 Abstract: In 2010, the time of blocking dams for electricity generation activities of the Son La hydropower plant on Da river, up to now, after nearly 08 years of water storage, the Son La reservoir environment has stabilized and formed the soil ecosystem. flood - typical reservoir ecosystem in the highlands of the Northwest, Vietnam. Basing on the monitoring data of the Da River at the beginning of 2010, monitoring data for Son La hydropower reservoir (2010 - 2017), monitoring data for Lai Chau hydropower reservoir (phase 1/2018). This paper uses data collection and analysis method to compare the quality of Da river water before and after the dam to the Son La reservoir at 03 observation sites: Hang Tom bridge Muong Lay, Dien Bien), Pa Uon Bridge (Quynh Nhai, Son La), Upper Muong La (Son La). Analyze the quality of Son La hydropower reservoir through input data (Lai Chau hydropower reservoir) and output at monitoring site (downstream of the dam) in Son La province during 2015-2017. The analytical results confirmed the process of changes in the groups of physical, chemical, microbiological, pesticide residues in the lake water environment and proved to change the quality of hydropower reservoirs. Son La seasonal. At the same time, discuss and evaluate some natural, social and human factors that affect the water quality of Son La hydropower .
