Preliminary Analysis of Interception Measures on Initial Rainwater Runoff
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Abstract:
The initial rainwater runoff is the main source of pollution for receiving water bodies, and using the rainwater depth to define and then intercept the initial rainwater runoff can lower the pollution of receiving water bodies. In order to facilitate the effective engineering measures in the early closure of runoff, the basic standard limit values of grade V water in "the people's Republic of China environmental quality standard for surface water" (GB 3838-2002) were used as the basis. The rainwater runoff with higher pollution index values than the standard limits were defined as the initial rainwater runoff, and therefore the late-stage rainwater runoff had the pollution index values equal to or lower than the standard limits, which were expressed by the rainfall volume in unit time. Based on this, the reinforced concrete pipe (full flow) calculation chart was used to determine the diameter of intercepting tube, and the overflow weir type was used to intercept the flow. Verified by the practical engineering, the intercepting effect was remarkable and easy for engineering implementation.
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