The precipitation rate of irrigation is influenced by microclimate factors because microclimates can affect how water interacts with the environment in any given area. A microclimate is a small, localized area where the climate differs from the larger surrounding area due to various conditions such as topography, vegetation, and proximity to structures or bodies of water.
For instance, an irrigation zone that is shaded by trees may experience less evaporation, thus retaining moisture longer, which may affect the way irrigation is applied. Adjustments in the precipitation rate can be made based on these microclimate conditions to ensure optimal water application. Similarly, areas that receive more sunlight may require a higher precipitation rate to account for increased evaporation and plant needs.
In contrast, while the type of drainage system, spacing of sprinkler heads, and layout of irrigation plans are essential design considerations in irrigation systems, they are more directly tied to overall system design and engineering rather than the localized conditions dictated by microclimates.