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Roof rainwater runoff pollutant concentration calculation method and controlled release application thereof

A pollutant concentration and calculation method technology, applied in calculation, data processing application, general water supply conservation, etc., can solve the problems of large differences, achieve good operability, close connection, and improve construction efficiency

Active Publication Date: 2020-04-21
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, on the one hand, due to the many factors affecting the erosion process, including rainfall intensity, catchment length, slope, pollutant type, etc., and on the other hand, due to the uncertainty of rainfall in the actual process, the current water quality model is used to analyze the roof runoff. There are certain limitations in the calculation method of pollutant concentration, which is quite different from the actual situation.

Method used

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  • Roof rainwater runoff pollutant concentration calculation method and controlled release application thereof
  • Roof rainwater runoff pollutant concentration calculation method and controlled release application thereof
  • Roof rainwater runoff pollutant concentration calculation method and controlled release application thereof

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Embodiment 1

[0036] A method for calculating the concentration of pollutants in roof stormwater runoff. The steps are as follows:

[0037] (1) Based on the rain pattern formula issued by City S in 2017 (Equation 1, in line with the characteristics of typical Chicago rain patterns), learn the changing law of rainfall in city S under different rainfall return periods, and extract the specific parameter c in the rain pattern formula =0.846, b=7, r=0.4, and apply this data to the subsequent steps; when 0 When 60×r Among them, t is the rainfall duration, min; r is the comprehensive rain peak position coefficient; t b Is the rainfall duration before the peak, min; t a Is the rainfall duration after the peak, min; i(t b ) Is the instantaneous intensity before the peak, mm / min; i(t a ) Is the instantaneous intensity after the peak, mm / min; P is the design rainstorm return period, a;

[0038] (2) Design the rainfall return period P=1a and the rainfall duration T=1h in city S, and collect the number of su...

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Abstract

The invention belongs to the technical field of resources and environments. An existing method for calculating the roof runoff pollutant concentration through a water quality model is greatly different from reality in the application process, and aiming at the problem in the prior art, the invention discloses a roof rainwater runoff pollutant concentration calculation method, which comprises the following steps of: firstly, defining a typical rain pattern formula of regional rainfall, obtaining a change rule of rainfall of the region in different rainfall recurrence periods through the rain pattern formula, and applying the rule to subsequent steps; secondly, designing a rainfall recurrence period P and a session rainfall duration T of the region, collecting the number Td of sunny days inthe earlier stage of rainfall of the region, selecting a certain roof as an object, and defining the length L and the gradient theta of the roof; and calculating confluence time tc by a formula 2, andselecting a corresponding pollutant concentration calculation formula to describe the change process of the roof runoff pollutant concentration along with time according to the confluence time tc. The computational formula is high in scientificity and high in correlation with experimental data.

Description

Technical field [0001] The invention specifically relates to a method for calculating the concentration of roof rainwater runoff pollutants and its controlled release application, and belongs to the technical field of resources and environment. Background technique [0002] With the increase of urban residential area and building density, the roof area continues to expand, and its surface will accumulate a large number of pollutants on sunny days. When it rains, these pollutants will enter the urban water environment with rainwater runoff. Many studies have shown that the pollutant concentration of roof runoff is similar to that of road runoff, and some pollutants even exceed road runoff. Roof runoff, especially the initial roof runoff, has become one of the causes of urban rainwater non-point source pollution. In this context, the simulation of roof runoff water quality is of great significance in terms of pollutant control release and technical optimization. The rainwater qual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/26
CPCG06Q10/0637G06Q50/26Y02A20/152
Inventor 徐竟成顾韫辉任婕林晓虎郑涛程炜孙丹焱黄菊文乔俊莲李光明
Owner TONGJI UNIV
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