The best way to accurately know the application rate is to directly measure it in the field.Quantity Fluid Flow vs Bore Diameter Data Over time, nozzles become worn and drip emitters clog, or the pressure of the system may not be operated at the specifications of the manufacturer. A grower with an application rate of 0.22 inches/hour will need to irrigate four and a half hours (1 inch Г· 0.22 in/hr = 4.5 hr) during a week in August and a total of 127 hours (28 in Г· 0.22 in/hr = 127 hr) during the entire season.ДЄccurately estimating the application rate of an irrigation system requires precise knowledge of the discharge rate of the drip tape or sprinkler nozzle. For an average year in the Pajaro Valley, a strawberry crop needs one inch of water during a typical week in August and about 28 inches for an entire crop cycle. The application rate can be used to determine how long to irrigate a crop from estimates of crop water use. Using the application rate to determine how long to irrigate Application rate (in/hr) of drip systems for common drip tape flow rates and bed widths in strawberry. The application rate of the drip system can be estimated by finding the row with the flow rate that is closest to the tape that you use, and then reading the application rate under the bed and drip line configuration used at your farm. Table 1 also summarizes application rates of some common drip system configurations for strawberry. The application rate of a drip system can be determined from the tape flow rate (gpm/100 ft), bed width (inches), and number of drip lines using the following equation:ДЄpplication rate (inches/hour) = tape flow rate (gpm/100 ft) Г— number of tapes Г— 11.55 Г· bed width (inches) Д®xample: tape flow rate = 0.45 gpm/100 ft bed width = 48 inches 2 drip lines per bedДЄpplication rate = 0.45 gpm/100 ft Г— 2 drip lines Г— 11.55 Г· 48 inches = 0.22 inches per hour 1): emitter discharge rate = 0.16 gph emitter spacing= 8 inches Tape discharge rate (gpm/100 ft) = Emitter discharge rate (gph) Г— 20 Г· emitter spacing (inches) Д®xample (from Fig. To calculate the tape flow rate from the emitter discharge rate, use the following equation: The discharge rate of the emitters is usually expressed in units of gallons per hour (gph). Some tape manufacturers provide the discharge rate of the emitters and the emitter spacing rather than the flow (discharge) rate of the tape. Examples of a drip tape label with flow (discharge) rate information. 1) and is often expressed in units of gallons per minute per one hundred feet of tape (gpm/100 ft).ДЇigure 1. The flow rate of the drip tape is usually specified on the label of the tape roll (Fig. The flow rate of the tape (also referred to as the discharge rate) corresponds to a specific pressure, usually 8 or 10 pounds per square inch (psi). The variables determining the application rate of drip systems are: 1. For raised bed crops such as vegetables and strawberries, the application rate includes the area of both the furrows and the bed tops.Дetermining the application rate of drip systems In other words, an irrigation system would have the same application rate on a one-acre or a five-acre block. Note that the application rate is independent of the number of acres irrigated. An application rate of 0.27 in/hr means that when the system is operated for one hour it will apply 0.27 inches of water to the field if it is operated 45 minutes, 0.2 inches (0.27 in/hr Г— 45 min Г· 60 min/hr) are applied and so on. The application rate is the depth of water that the irrigation system applies during a period of time, and is typically expressed in units of inches per hour (in/hr). Knowing the application rate of your irrigation system will allow you to convert these recommendations into the time (hours) to operate the irrigation system. Determining how long to run your irrigation system can be challenging because typical recommendations on how much water to apply are expressed in units of inches (or feet) of water depth.

Water flow calculator with psi