Research On The Separation Process Of Rainwater

With the rapid development of the national economy and accelerating the modernization of the city. water pollution and water shortage is becoming more prominent, and how to clean and efficient use of rainwater resources conservation and utilization of water resources has been an important research topic, recycling rainwater has a vital role of improving the urban ecological environment and promoting sustainable development of urban water use and urban water environment.Due to the randomness of natural rainfall. the impact of the diversity of surface contamination and the uncertainty and complexity of hydrological, geomorphological characteristics, water quality characteristics have a greater random variation. Falling to the ground in the form of rainwater runoff after a lot of erosion due to rainwater surface runoff of pollutants makes higher rainfall early pollutant concentrations, the relatively low concentration of pollutants in the late rain. With the advancement of technology, how to more efficiently collect clean rainwater and how to improve the safety and reliability of rainwater collection device has been a rainwater harvesting technology is a major issue. Many existing device does not change the characteristics of the random initial rainwater runoff of pollutants to track, identify, and judgment, can not be accurately determined because of the exclusion of rain and a high concentration of pollutants in the early period of time to collect clean rainwater, in the specific operation will result in high concentrations of pollutants flowing into the rainwater collection tank and waste and eliminate a lot of clean rainwater can be collected.This topic by referring to the relevant literature, the hydrodynamic characteristics of basic research on urban stormwater runoff. simulated drowning of stormwater runoff model to analyze a constant stream of random fluctuations and unsteady flow ion concentration of pollutants in the presented changes over time. Establishment of a one-dimensional transient hydraulic control drainage source pollutants discrete equations to calculate the dispersion coefficient. Thus the hydraulic control canal transport of contaminants in discrete process research. Meanwhile, the study analyzed the correlation constant flow and unsteady flow get the empirical formula of dispersion coefficient from the constant flow of unsteady flow evenly between the shed on the early spread.This study aims to test the initial pollutant transport in stormwater runoff discrete process research and characterization, and hope to provide empirical data for the separation of existing rainwater collection device, and to give an effective solution to the low urban rainwater harvesting separation device efficiency, safety and poor reliability.