长江科学院院报 ›› 2021, Vol. 38 ›› Issue (2): 7-11.DOI: 10.11988/ckyyb.20191250

• 水资源与环境 • 上一篇    下一篇

宗通卡水库蓄水后砷的时空分布模拟与评价

翟文亮, 曹慧群, 罗平安   

  1. 长江科学院 流域水环境研究所,武汉 430010
  • 收稿日期:2019-10-16 修回日期:2020-05-06 发布日期:2021-02-23
  • 作者简介:翟文亮(1990-),男,河南新乡人,工程师,硕士,研究方向为水文模拟、非点源污染模拟、地表水环境模拟。E-mail:857658774@qq.com

Temporal and Spatial Distribution of Arsenic after Storage in Zongtongka Reservoir: Simulation and Evaluation

ZHAI Wen-liang, CAO Hui-qun, LUO Ping-an   

  1. Basin Water Environment Department, Yangtze River Scientific Research Institute, Wuhan 430010, China
  • Received:2019-10-16 Revised:2020-05-06 Published:2021-02-23

摘要: 为科学评估成库后砷对宗通卡水库的影响,构建了三维水沙砷预测模型,采用等温吸附试验分析水库蓄水后泥沙对砷的吸附平衡规律;以水文水质条件相似的果多水库对模型参数进行验证,模拟宗通卡水库成库后不同水期砷的三维分布。结果表明:蓄水后水库泥沙浓度和砷浓度呈沿程下降的变化规律。泥沙浓度呈现丰水期大于枯水期的特征,坝前泥沙浓度由表层至底层呈现明显增大的变化规律;砷浓度呈现丰水期小于枯水期的特征,支流浓度较大时会形成岸边污染带,坝前砷浓度由表层至底层均呈现明显增大的变化规律。研究成果为开展环境影响评价提供了参考依据。

关键词: 砷, 分配系数, 等温吸附试验, 时空分布, 宗通卡水库

Abstract: A three-dimensional model of predicting arsenic in water and sediment was constructed to scientifically evaluate the influence of arsenic on Zongtongka Reservoir after reservoir formation. The adsorption equilibrium of sediment on arsenic after reservoir impoundment was analyzed through isothermal adsorption test. The Guoduo Reservoir which is of similar hydrological and water quality conditions with Zongtongka Reservoir verified the model parameters and simulated the three-dimensional distribution of arsenic in different water periods after the Zongtongka Reservoir was impounded. Results revealed that after water storage, the sediment concentration and arsenic concentration of the reservoir both declined along the stream. Sediment concentration in wet season is larger than that in dry season, and sediment concentration in front of the dam in the surface is obviously smaller than that in the bottom; while arsenic concentration in wet season is smaller than that in dry season, and when the arsenic concentration in tributary is large, shore pollution zone will be formed. Arsenic concentration in front of the dam shows a significant increase from the surface layer to the bottom layer.

Key words: arsenic, partition coefficient, isothermal adsorption experiment, temporal and spatial distribution, Zongtongka Reservoir

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