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。
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.
出处
《水利学报》
EI
CSCD
北大核心
2010年第1期7-16,共10页
Journal of Hydraulic Engineering
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)
关键词
水库调控
一维模型
水环境变化
枯水期
reservoir operation
one dimension model
aquatic environment changes
