论文部分内容阅读
基于FVCOM建立大辽河感潮河段的水动力-扩散数值模型,采用保守物质输运扩散法研究大辽河感潮河段在潮和径流作用下的水体交换特征。结果表明:径流是影响大辽河感潮河段水交换的主要因素,径流为114 m3/s条件下,半交换时间为226 h,587 h后达到90%的交换状态,且径流加倍,对应交换时间近似线性递减;子区域水交换差异由潮和径流的相互作用决定,径流越大,靠向上游河段水体交换得越快,径流减小时近河口区段水体交换变快,而中游河段交换变慢。
Based on FVCOM, a hydrodynamic-diffusional numerical model was established for the tidal reach of the Daliao River, and the transport characteristics of water exchange under the influence of tide and runoff in the tidal reach of the Dali Liaohe River were studied by conservative transport method. The results showed that runoff was the main factor influencing the water exchange in the tidal reach of Daliao River. The runoff time was 114 m 2 / s, the half-exchange time was 226 h, and reached 90% after 587 h. The runoff was doubled, corresponding to exchange The time is approximately linearly decreasing; the difference of water exchange in subregion is determined by the interaction of tide and runoff. The larger the runoff, the faster the exchange of water body in the upstream reaches, the faster the exchange of water in the estuarine section when the runoff decreases, Exchange slower.