考虑取水口和支流的河流纳污能力计算模型研究与应用

发布时间：2018-02-14 07:51

本文关键词： 河流纳污能力取水口支流　出处：《水利学报》2017年03期 　论文类型：期刊论文

【摘要】：为了给入河污染物总量控制以及明确水功能区限制纳污红线提供技术支持,本文基于一维稳态条件下的水质模型,建立了考虑取水口和支流的分段求和模型来计算河流纳污能力。该模型以排污口、取水口或支流入口为控制断面将功能区划分为若干河段,确定各河段的流速,逐段计算纳污能力。相对于传统纳污能力计算模型,模型在考虑了支流和取水的基础上,能更灵活地对应功能区水质目标等级在水环境质量标准限值范围内合理选择水质目标浓度,从而避免出现纳污能力过严格或过宽松的情况。将模型应用于渭河干流陕西段,考虑取水口和支流的模型计算结果为73 814.43 t a,相比于断首控制模型的36 159.96 t a和功能区段末模型的85 365.49 t a,考虑取水口和支流的模型计算结果更适中,同时模型可以得出任意两个控制断面之间的纳污能力;模型中考虑了取水口、支流及分段流速等因素,得到的纳污能力也更科学、合理,能为明确水功能区限制纳污红线及入河污染物总量控制提供技术支持。
[Abstract]:In order to control the total amount of pollutants into the river, clear water pollutant limits the function of the red line to provide technical support, the water quality model of one-dimensional steady state conditions based on considering piecewise summation model to calculate the water intake and the tributaries of the river pollutant carrying capacity. In this model, the sewage outfall, water intake or entrance for the control section of the branch function area is divided into several sections to determine the river flow, calculated assimilative capacity. Compared with the traditional computing model assimilative capacity, model based on the tributaries and water, more flexible corresponding functional area water quality target level limit of reasonable range of water quality in the target concentration in the water environmental quality standards thus, to avoid the WaterEnvironmental capacity too strict or too loose. The model is applied to the Weihe River in Shaanxi, considering the model calculation results of water intake and tributaries of the 73814.43 t a, compared to the First off control model of 36159.96 t a and functionsection end model of the 85365.49 t a, the calculation results of water intake and tributaries of the model considered more moderate, and the models can be drawn between any two control section of the pollutant carrying capacity; model considering the intake factors of senior high school entrance examination, tributaries and sectional flow velocity, the pollutant ability is more scientific and reasonable, can clear water pollutant limits the function of the red line and the total amount of pollutants into the river control to provide technical support.

【作者单位】：西安理工大学陕西省西北旱区生态水利工程重点实验室;
【基金】：国家自然科学基金项目(51679186,51679188) 水利部公益性行业科研专项(201401019) 陕西省青年科技新星项目(2015KJXX-30)
【分类号】：X52

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