Journal of Food, Agriculture and Environment

Risk prediction of water salinization after reservoir subdivision: A case study of Beidagang Reservoir, China

Author(s):

Liqin Zhu ^{1, 2}*, Cuiling Jiang ², Youheng Wang ², Yanmei Peng ², Peng Zhang ²

Recieved Date: 2013-05-30, Accepted Date: 2013-09-28

Abstract:

Reservoir water salinization in coastal areas has been a serious problem that threats the safety of reservoir water supply. Beidagang Reservoir is a major regulating reservoir for the South-to-North Water Diversion Project and the Yellow River to Tianjin Water Diversion Project. In order to meet the security needs of water supply and to ensure the effective and comprehensive utilization of water, it was planned to be subdivided into the east part and west part. As a management strategy, reservoir subdivision deserves more attention regarding its effects on the improvement of reservoir water quality. Based on the field monitoring and laboratory experiments, this study analyzed the salt contents and distributions in water and sediments of Beidagang Reservoir. Considering its environmental conditions before subdivision and the actual situation of its mature operation counterpart-Beitang Reservoir which is located in the same region and has been operated for many years, the risk of water salinization in the west part of Beidagang Reservoir (used as emergency water source and demanded a higher water quality criterion) after subdivision was predicted. The results suggested that the salinity of Beidagang Reservoir was always high, with Cl^- concentrations more than four times higher than that of drinking water quality standard (250 mg/L), and the average TDS concentration reached 1167.7 mg/L. Its average contents of Cl^- and total dissolved solids (TDS) in sediments at the depth of 100-200 cm (the depth of new interface after subdivision) were 0.65% and 0.31%, respectively, higher than those at the depth of 0-100 cm and lower than those at the depth of 200-500 cm. For water salinization occurred in both Beidagang Reservoir after each impoundment with water from the Yellow River during the period of 2000-2010 and Beitang Reservoir with relatively lower salinities in water and sediments, the west of Beidagang Reservoir was predicted at high risk for water salinization.

Keywords:

Chloride ion, salinization, reservoir subdivision, risk prediction

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 3&4
Category: Environment
Pages: 1726-1729

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