The device herein disclosed and described provides a water collection system that separates the initial flush of rainwater, which contains higher concentrations of undesirable contaminants from later received rainwater having lower concentrations of contaminants to be stored for later use or to be discharged directly to receiving bodies of water. The device contains a cistern for treating first flush rainwater, a basin for receiving water in fluid connection with the cistern and a water storage tank, a water diversion channel that diverts first flush rain water to the cistern and additional rainwater to a water storage tank, a floatation device on a connecting rod affixed to the diversion channel that acts to operate the diversion channel when the water in the cistern achieves a desired height by diverting the additional water received to the water storage tank.

A hydraulic separation and collection system applicable to linear street curb-inlet type drainage-chambers, independent or connected to a storm drainage network. The FIRST FLUSH COLLECTOR is a pollutant separation and collection apparatus that can be integrated into an existing storm drain network, or be retrofitted as a component into a new or existing curb-inlet type drainage-chamber. The outfall from the FIRST FLUSH COLLECTOR can be redirected to a conventional stormwater pollutant BMP, or be diverted to a sanitary sewer, storm drain, or combined collection system for treatment downstream. The apparatus is envisaged as a simple, easy to install prefabricated-kit utilizing a basic build-in-place separation and collection apparatus. The apparatus can be readily adapted to the needs of a given curb-inlet type drainage-chamber with minor alterations to the chambers, or to the connected existing storm drainage network. The uniquely adaptative capability of the apparatus enables selective structuring based on the retrofitting requirements of a curb-inlet type drainage-chamber. The system is designed to handle a variety of ecosystem-contaminants, ranging from basic street-refuse and floatable objects, to coarse sediment, finer silt, and comparatively minute environmentally-hazardous petrochemicals, heavy-metals, phosphates, and nitrates. The system is design to refuse floatables and debris which will continue to the existing curb-inlet type drainage-chamber. Other pollutants contained in the first flush are readily collected from the apparatus and transferred to a selected outfall facility. The system has no moving or mechanical components and is designed to function on fluid hydraulic principles.

A hydraulic separation and collection system applicable to linear street curb-inlet type drainage-chambers, independent or connected to a storm drainage network. The FIRST FLUSH COLLECTOR is a pollutant separation and collection apparatus that can be integrated into an existing storm drain network, or be retrofitted as a component into a new or existing curb-inlet type drainage-chamber. The outfall from the FIRST FLUSH COLLECTOR can be redirected to a conventional stormwater pollutant BMP, or be diverted to a sanitary sewer, storm drain, or combined collection system for treatment downstream. The apparatus is envisaged as a simple, easy to install prefabricated-kit utilizing a basic build-in-place separation and collection apparatus. The apparatus can be readily adapted to the needs of a given curb-inlet type drainage-chamber with minor alterations to the chambers, or to the connected existing storm drainage network. The uniquely adaptative capability of the apparatus enables selective structuring based on the retrofitting requirements of a curb-inlet type drainage-chamber. The system is designed to handle a variety of ecosystem-contaminants, ranging from basic street-refuse and floatable objects, to coarse sediment, finer silt, and comparatively minute environmentally-hazardous petrochemicals, heavy-metals, phosphates, and nitrates. The system is design to refuse floatables and debris which will continue to the existing curb-inlet type drainage-chamber. Other pollutants contained in the first flush are readily collected from the apparatus and transferred to a selected outfall facility. The system has no moving or mechanical components and is designed to function on fluid hydraulic principles.

A grate (111)-covered gutter (110) of a paved part of the earth's surface (100) is temporarily closed off by means of a closing organ (130), the gutter (110) being connected to a sewage pipe (120). Thus, the draining away of contaminating liquid can be prevented. The closing organ (130) includes a valve (131 fitted rotatably in the gutter (110). The valve (131) can be in a first stable position wherein the valve (131) seals. The valve can also be in a second stable position in which the valve (131) releases the gutter (110) for the discharge of liquid (rainwater) to the sewage pipe.

The device herein disclosed and described provides a water collection system that separates the initial flush of rainwater, which contains higher concentrations of undesirable contaminants from later received rainwater having lower concentrations of contaminants to be stored for later use or to be discharged directly to receiving bodies of water. The device contains a cistern for treating first flush rainwater, a basin for receiving water in fluid connection with the cistern and a water storage tank, a water diversion channel that diverts first flush rain water to the cistern and additional rainwater to a water storage tank, a floatation device on a connecting rod affixed to the diversion channel that acts to operate the diversion channel when the water in the cistern achieves a desired height by diverting the additional water received to the water storage tank.

An apparatus for filtering fluid has a container, a platform positioned in the interior volume of the container in a location above a bottom of the container, and a bag filter extending through a hole in the platform. The bag filter has an inlet and an outlet. The inlet is positioned at or above a top surface of the platform and an outlet positioned below the top surface of the platform such that a fluid passing through the fluid inlet of the container flows into the inlet of the bag filter and outwardly of the outlet of the bag filter so as to flow toward the fluid outlet of the container. A retainer plate is positioned over the platform and has an orifice opening to the inlet of the bag filter.

A first flush diverter system, the system comprising an inlet supplying a fluid, a flush chamber comprising an opening through which fluid can pass, a retention chamber for containing a predetermined volume of fluid, and an outlet for conveying overflow fluid. The retention chamber is housed within the flush chamber, the retention chamber comprises a receiving aperture for receiving the fluid, and the retention chamber is configured to engageably seal the opening when the retention chamber contains the predetermined volume of fluid. The first flush diverter system overcomes limitations of flush storage containers, including the requirement to drain said flush storage containers.

The invention is directed towards decoupling tidal effects from time-series depth measurements. A drainage sensor includes a fluid depth sensor. The drainage sensors are positioned at monitoring points in a drainage system. Stormwater flows into an input of the drainage system. A tidal depth sensor is positioned in a tidal body of water near an output of the drainage system. During period of high tide, tidal water backflows into the output of the drainage system. The decoupling is accomplished by generating a model of tidal backflow patterns based on data from the drainage sensors and the tidal sensor. The model accounts for a lag time between the tidal data measurements and measurements of the drainage sensors. The model is be used to predict the contribution of tidal backflow effects to stormwater data.

A system for purifying rainfall runoff including a bar screen; a collection and diversion device; a filter channel; a grass ditch; and a water storage tank. The bar screen is disposed around the collection and diversion device for preliminarily filtering the road rainfall runoff. The collection and diversion device collects the road rainfall runoff and diverts early rainfall runoff to the filter channel, after the filter channel is full, later rainfall runoff is directly diverted to the grass ditch through open channels. The grass ditch includes a percolation bed capable of filtering the early and later rainfall runoff. The water storage tank is connected to the grass ditch via a guiding pipe, to receive the rainfall runoff effusing out of the grass ditch. Part of the rainfall runoff received by the water storage is transported to the percolation bed by a return conduit.

The invention is directed towards decoupling tidal effects from time-series depth measurements. A drainage sensor includes a fluid depth sensor. The drainage sensors are positioned at monitoring points in a drainage system. Stormwater flows into an input of the drainage system. A tidal depth sensor is positioned in a tidal body of water near an output of the drainage system. During period of high tide, tidal water backflows into the output of the drainage system. The decoupling is accomplished by generating a model of tidal backflow patterns based on data from the drainage sensors and the tidal sensor. The model accounts for a lag time between the tidal data measurements and measurements of the drainage sensors. The model is be used to predict the contribution of tidal backflow effects to stormwater data.