News Center
2024-11-28
How to choose the right sprinkler heads for a landscape irrigation system?
I: Sprinkler Selection
When selecting sprinklers, in addition to considering their inherent performance, such as operating pressure, flow rate, range, combined irrigation intensity, and adjustability of the spray angle, factors such as soil's allowable irrigation intensity, plot size and shape, water source conditions, and user requirements must also be considered.
In addition, in the same project or the same irrigation group in a project, it is best to use one model or similar performance sprinklers to facilitate the control of irrigation uniformity and the operation and management of the entire system. In existing projects, some have installed sprinklers with completely different performances in a pursuit of water features, resulting in unassured irrigation uniformity.
A point to note when selecting sprinklers is that irrigation systems are not fountains; their purpose is to supplement the temporal and spatial deficiencies of plant water requirements, not to create artificial water features. Therefore, landscape effects can only be considered after the water requirements are met.
There are many types of such sprinklers. Classified by range, there are short-range sprinklers (0.6-5.8 meters), medium-short range sprinklers (4.3-9.1 meters), medium-range sprinklers (8.5-15.9 meters), and long-range sprinklers (over 20 meters); classified by spray type, there are impact sprinklers, trajectory sprinklers, rotating sprinklers, and rotating trajectory sprinklers; classified by application, there are garden sprinklers, golf course sprinklers, etc. These sprinklers can automatically pop up from the ground when pressurized water is sprayed and retract into the ground when watering stops, without affecting mechanical operations in the garden landscape.
II: Sprinkler Introduction
1.1 Short-range Sprinklers
Generally non-rotating impact sprinklers. The pop-up height of these sprinklers is 50mm, 75mm, 100mm, 150mm, and 300mm. A variety of spray patterns or adjustable angle nozzles are available, and the irrigation intensity is relatively high. Suitable not only for small-area irrigation but also for watering and dust removal of shrubs and hedges.
The nozzles of these sprinklers are mostly "matched irrigation intensity nozzles," meaning that regardless of full-circle, half-circle, 90-degree, or other angles, the irrigation intensity is basically the same. This characteristic is extremely beneficial for ensuring the uniformity of the system's spray.
1.2 Medium-Short Range Sprinklers
Mostly rotating sprinklers, with a range of 4.3-11.3 meters and pop-up heights of 100mm, 150mm, and 300mm. These sprinklers are suitable for medium-sized green spaces and irrigation of shrubs and flowers. Specifically, the MP series buried rotating trajectory sprinklers, with a range of 3-9 meters, are particularly suitable for slopes and newly planted areas due to their unique spray method and unparalleled water-saving characteristics.
Pop-up heights of 100mm and 300mm are available, suitable for larger areas. The I-20 sprinkler is equipped with a pressure relief valve and an optional stainless steel riser with a unique valve at the top, allowing individual sprinklers to be closed during system operation for easy maintenance or nozzle replacement.
1.4 Long-range Sprinklers
The range is over 20 meters. They are characterized by high material strength and good impact resistance. In addition to large-area irrigation, they are particularly suitable for sports field irrigation systems.
Among sprinklers of various ranges, "pressure relief type" sprinklers can be selected. Pressure relief sprinklers are generally installed in lower areas of irrigation systems with significant terrain undulations, effectively preventing water in the pipes from overflowing from low-position sprinklers when watering stops, affecting the normal growth around the sprinklers.
The soil's allowable irrigation intensity is one of the main factors affecting sprinkler selection. Irrigation intensity refers to the water depth sprayed onto the ground per unit time. We generally consider the combined irrigation intensity because irrigation systems are basically composed of multiple sprinklers working simultaneously.
The requirement for irrigation intensity is that the water falling to the ground can immediately infiltrate the soil without waterlogging or surface runoff, i.e., the combined irrigation intensity (ρcombined) of the sprinkler should be less than or equal to the soil's water infiltration rate. In addition, the soil's allowable irrigation intensity decreases significantly with increasing terrain slope. For example, when the slope is greater than 12%, the soil's allowable irrigation intensity will decrease by more than 50%.
Therefore, extra attention should be paid to sprinkler selection in projects with undulating terrain.
Related News
Hello
Here you can leave your contact number and we will contact you in time.
Address
No. 1, Dujuan Road, Flower Expo Park, Longxi Avenue, Liwan District, Guangzhou
Mall Link
Copyright©Guangzhou Yuangda Sprinkler Irrigation Equipment Co., Ltd, 2024