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漓江枯水期水库补水对下游水环境的影响
  • 期刊名称:水利学报, 2010, 41(1):7-16
  • 时间:0
  • 分类:TV148[水利工程—水力学及河流动力学]
  • 作者机构:[1]中国科学院生态环境研究中心,北京100085, [2]广西壮族自治区水利厅,广西南宁530023, [3]二滩水电开发有限责任公司,四川成都610021
  • 相关基金:国家自然科学基金面上基金(50879086);国家自然科学基金重点基金(50639070);水利部公益性项目(200801051)
  • 相关项目:水库运行对下游河道岸边带植被演替的影响
中文摘要:

通过建立漓江流域水环境模型,模拟了青狮潭水库补水及非补水模式下,枯水期其下游河道内水环境变化情况。研究结果表明,与非补水模式相比,枯水期补水模式导致水库下游河道的水环境发生较大变化。从时间上看,青狮潭水库补水模式使得下游河道水位升高,水面扩大、流速增大,河道内水温增加,溶解氧浓度有所下降。对水环境影响较为强烈的时段为每年的10-12月,其中平水年的影响大于丰水年及枯水年;从空间上看,青狮潭水库补水模式对下游水环境的作用沿程逐渐减弱,但在影响较强的10~12月间,研究区域内的河道水环境很难通过自身恢复到原有状态。

英文摘要:

Lijiang, famous for the delicacy scenery, is confronting with the emergency of water shortage. Qingshitan reservoir is located on the upstream of Guilin city, and has great impact on the downstream aquatic ecosystem since 1987 when the water compensation project was implemented. A one-dimensional hydrodynamic-water quality model for the entire river with different inflow pattern during dry season has been developed to provide an aquatic animal model with hydrodynamic datum in further research. It is found that, comparing with natural runoff, reservoir operations lead to rise in temperature but reduce in range, and decrease in dissolved oxygen but increase in range along downstream, especially from October to December.

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