A solenoid valve for irrigation systems may comprise a gardening tube, a plastic valve piece, a cover and a magnetic member. The gardening tube has a water inlet channel and a water outlet channel which are communicated, and a valve tube vertically extending from the gardening tube has a valve chamber. The valve piece is positioned in the valve chamber. A second connecting tube vertically protruding from the cover has a housing communicated with the valve chamber, and a solenoid coil and a metal ring are respectively disposed on the second connecting tube. The magnetic member has a magnet installed therein, and the magnet has a first magnetic surface and a second magnetic surface at two ends thereof.

A valve assembly includes an inlet and an outlet, and has a first state where liquid is stopped from flowing from the inlet towards the outlet, a second state where liquid is released to flow from the inlet towards and out of the outlet, and a terminal state where after flowing out of the outlet, the liquid is stopped form flowing out of the outlet. An incoming command triggers the valve assembly from the first state towards the second state and, at or after reaching the terminal state, the valve assembly transmits an outgoing command.

An integrated eliminating device and its method for initial runoff pollution is provided, wherein a plurality of the water receiving pipes for collecting initial runoff are gathered and connected to the first water reservoir, one end of the water inlet pump is connected with the first water reservoir via the water receiving pipes, and the other end of the intake pump is connected with an water inlet opening of the rice field; the rice field is divided into a plurality of sub-parcels in a shape of long stripes, a regulating gate is set. An outlet of the rice field is communicated with the second water reservoir and which is communicated with the water inlet opening of the rice field via the reflux pump.

An irrigation and harvesting system includes one or more center pivot irrigation assemblies. The center pivot irrigation assembly includes a hollow shaft attached to an area of land; one end of a hollow member is attached to the hollow shaft, wherein the hollow member pivots around the hollow shaft, and wherein the hollow member carries irrigation water; a second end of the hollow member is connected to a wheel in contact with the ground, and the wheel is driven at a controlled speed; and a traction device including harvesting equipment is attached to the hollow member.

Disclosed embodiments can provide a system and method for controlling irrigation schedules for a sprinkler system for at least one irrigation zone. The embodiments include automatically updating irrigation schedules based at least in part on watering restriction data from a water authority, such as a water utility authority, and water usage data for a property including the at least one irrigation zone.

A control system for a low-volume irrigation system includes a plurality of valve controllers for opening and closing valves; an irrigation system controller for controlling the valve controllers in accordance with an irrigation plan; and a graphical user interface for allowing a user to interact with the irrigation controller and to create the irrigation plan. The graphical user interface displays an irrigation zone list, an irrigation set list, and an irrigation plan field. The user interface has drag and drop functionality that permits an irrigation zone listing from the irrigation zone list to be dragged and dropped into any of the irrigation set listings in the irrigation set list and that permits an irrigation zone listing or an irrigation set listing to be dragged and dropped into the irrigation plan to create irrigation steps within the irrigation plan.

A decoder for a two-wire irrigation system is disclosed, having the ability to be remotely updated with new firmware over the two-wire network, the ability to download irrigation commands that can be executed at a later time, the ability to adjust its data speed when data corruption is encountered, and the ability to sense the position of an attached solenoid plunger.

Disclosed embodiments can provide a system and method for controlling irrigation schedules for a sprinkler system including automatically updating irrigation schedules based on qualitative and quantitative feedback and meteorological data as well as matching optimal or near-optimal irrigation schedules to other sprinkler zones based on characteristics of the landscape and sprinkler system as well as other characteristics.

A latching solenoid slave valve for wirelessly receiving watering instructions from an irrigation controller via acoustical waves or pulses. The latching solenoid slave valve comprises a diaphragm in direct communication with a main water distribution conduit of the irrigation system for detecting acoustical waves or pulses transmitted by pressurized water of the main water distribution conduit. An accelerometer is supported by the diaphragm for generating an output signal as the diaphragm vibrates due to detection of the acoustical waves or pulses. A microcontroller is electrically coupled to the accelerometer for processing the output signals of the accelerometer, and the microcontroller determining, from the processed output signals of the accelerometer, whether or not the latching solenoid slave valve is to commence a watering cycle for a desired duration of time. An irrigation controller is wirelessly coupled to the latching solenoid slave valve for controlling operation thereof.

An irrigation system comprises a plurality of towers, a time domain reflectometry (TDR) unit, and a central controller. Each tower includes a successive one of a plurality of safety switches, with each safety switch being either closed or open. The safety switch of each tower is electrically connected to at least one safety switch of another tower. The TDR unit is electrically connected to at least one safety switch and is configured to output data regarding an open safety switch. The central controller is configured to receive data from the TDR unit, and determine, according to the data from the TDR unit, at least one of a location of the open safety switch and an identifier of the tower associated with the open safety switch.