警戒水位是防汛部门规定的江河堤防需要处于防守戒备状态的水位,许多河流控制断面的警戒水位使用已有数十年,部分地区水情、工情以及防洪能力等均已发生了较大的变化,原警戒水位已逐渐不能适应当前防汛工作需要,警戒水位的复核修订符合防汛工作的需要,也具备修订的条件。目前警戒水位拟定方法的研究较少,本文结合控制断面水情、工情及防护对象防洪能力等因素,以警戒水位设定功能为基础,梳理了警戒水位拟定应考虑的主要影响因素,并提出了一种河流警戒水位拟定计算方法,对国内其他地区河流警戒水位复核修订工作具有较好的参考价值,也为河流防洪特征水位理论研究提供了一种新的思路。

Warning level is a characteristic water level proposed by hydraulic departments for dikes to prevent damage from floods． The warning level of rivers in some areas has been used for decades． The situation of river channel as well as flood conttol projects and the ability of protected objects to prevent damage from floods has changed a lot． The original warning level can not meet the demands of current flood control work． It is feasible and necessary to redesign the warning level in many areas． There is little research on the drafting warning level of rivers． In this paper,a method of calculating warning level of rivers is proposed． The method integrates the factor of hydraulic information,situation of flood control works and protected objects,then takes the main function of warning level as foundation,and points out the main influence factor on drafting warning level． A quantitative method is proposed,which has great reference value on drafting warning level forother rivers． And also,the method provides a new idea to the study of characteristic water stage for flood-control．