基于MIKE11模型的南涑河初汛期水质水量调度研究

北方冬春两季气候干燥,降水不具备形成径流条件,农田残留化肥、腐败有机物等污染物在沟渠内聚集。汛期沟渠内污染物随地表径流汇入河道,对干流河道水质造成影响。为研究初汛期污染物汇入对河道水质的影响,选择北方淮河流域重点河流南涑河作为研究对象,针对COD和氨氮,建立MIKE11模型模拟在初汛期随污染物汇入后南涑河水质的变化规律,探索最佳调度方案解决初汛期污染物含量过高的问题。研究表明,初汛期南涑河省控断面老屯桥不满足水质要求。通过模型模拟,截污能够保证初汛期南涑河省控断面水质满足水质目标。该方法为MIKE11模型的广泛应用提供基础,并为北方河道初汛期水质污染提供解决思路。

The climate in winter and spring in northern China is dry,the precipitation does not have the conditions to form runoff,and the pollutants such as residual chemical fertilizer and rotten organic matter gather in the ditch.During the flood season,the pollutants in the ditch converge into the river with the surface runoff,which has an impact on the water quality of the main river.In order to study the influence of pollutant influx on river water quality in the early flood season,Nansu River,a key river in the Huaihe River Basin in the north,was selected as the research object.Aiming at COD and ammonia nitrogen,a MIKE11 model was established to simulate the change law of Nansu River water quality with the influx of pollutants in the early flood season,and to explore the best dispatching scheme to solve the problem of excessive pollutant concentration in the early flood season.The study shows that Laotun Bridge in the control section of Nansu River does not meet the requirements of water quality in the early flood season.Through the model simulation,sewage interception can ensure that the water quality of the control section of Nansu River in the early flood season can meet the water quality target.This method provides a basis for the wide application of MIKE11 model,and provides a solution to water pollution in the early flood season of northern rivers.