黄河宁夏段COD及氨氮污染动态分布模拟探讨

Investigation on Simulation of Dynamic Distribution of COD and Ammonia-Nitrogen Pollution in Ningxia Segment of the Yellow River

通过对近10年来黄河宁夏段污染源的统计和分析,选择在最不利的水文条件下,利用一维和二维水质模型对COD及氨氮污染动态分布进行了模拟,结果发现,用一维水质模型模拟黄河宁夏段COD及氨氮的沿程浓度与实际监测值有较好的一致性.同时探讨了模型的降解系数、边界条件及黄河宁夏段COD和氨氮的沿程浓度的动态变化.

By counting and analyzing the pollution sources of recent years of Ningxia segment of the Yellow River, selecting the most disadvantageous hydrological condition to simulate and analyze by one- dimensional, two-dimensional water quality models, this results showed that there have better congruence to simulate the density of COD and ammonia-nitrogen along Ningxia segment of the Yellow River by one- dimensional water quality model and practical monitoring data. At the same time, this paper discussed the coefficient of declining of the model,boundary condition, and the dynamic change of density along Ningxia segment of the Yellow River.