长江马鞍山段内河水质二维预测计算模型

长江马鞍山段是马鞍山市最重要的水源,而又汇集全市工业废水和生活污水排放,因此建立适合此江段水域的水质评价和预测模型,预报排污对水质的影响就比较重要。本文通过建立适合长江马鞍山段内河水域的二维模拟预测模型,预报排污对水质的影响范围和程度,考察各排口污染物NH_3-N、TP、F~-在本江段的浓度分布。结果表明:姑溪河的影响较明显,但各污染物混合带宽度不超过100m,污染带对下游影响仅有2 000 m范围,水质基本上能达到Ⅱ类水质要求;通过编制二维模拟预测模型计算软件,可应用于污染控制措施、突发污染事件的预测防范以及沿江产业结构、布局调整等。

Calculation model of two dimensional predict on inland water quality in Ma'anshan section of Yangtze River

The Ma'anshan section of the Yangtze River is the most important water source of Ma'anshan and the section still collect city's industrial wastewater and domestic sewage.Therefore, it is more important to establish the evaluation and prediction model of water quality which can predict the effect of pollution discharge on water quality in Ma'anshan section of the river.The influence scope and extent of pollution discharge on water quality could be forecasted through establishing the two dimensional simulation and prediction model of inland waters in Ma'anshan section of the Yangtze River. The concentration distribution of pollutants NH₃-N, TP and F^- in this section were investigated. The results showed that the influence of pollution discharge on Guxi river is obvious, but the mixing zone width of pollutants is less than 100m.The pollution band has the impact scope of a thousand meters on overall water quality in downstream of the river. The water quality can basically reach the requirements of class II in Ma'anshan section of the Yangtze River. At the same time, the prediction model of two-dimensional simulation has certain guiding significance for the measure of pollution control,forecast of major emergencies and adjustment of industry structure and layout along the Yangtze Rive.