大凌河中游段生态需水量计算研究

The computing research of ecological water demand in the midstream segment of the Daling River

为计算维持大凌河中游河道生态平衡所需水量,运用大凌河中游段朝阳站以及大城子站1970-2013年实测流量资料,运用最小生态径流法和适宜生态径流法计算大凌河中游段最小和适宜生态需水量,并采用国外Tennant法对计算结果进行了评价,研究结果表明,采用平水期取75%、枯水期取80%,丰水期取45%的保证率下的适宜生态径流作为大凌河中游适宜生态需水,将使得大凌河中游段生态环境到达一个极佳状态,有利于河流自身的生态健康和河流周围生物栖息地的保护。研究成果对于大凌河中游段生态保护和生态治理提供重要参考价值。

To calculate ecological water demand of the Daling river midstream that can maintain the ecological balance of the river water needed,the flow data during 1970-2013 of Chaoyang and Dachengzi hydrological station,and the minimum ecological flow method and suitable ecological runoff method were used to calculate the appropriate and minimum ecological water demand in the midstream segment ,the Tennant method was used to evaluate the results.The results show that the water level of the ecological suitability to take 75% of the dry season to take 80%,45% of the wet period taken under guaranteed rate Daling river midstream runoff as appropriate ecological water demand will make Daling river midstream segment reach an excellent state of ecological environment conducive to their ecological health of rivers and streams around the habitat protection. The results provide an important reference value for ecological protection and ecological in the Daling river management segment.