We'll start with the controller. This is an electronic, computerized unit that is the brains behind the sprinkler system. The controller utilizes a timer that tells your system which set of sprinkler heads need to turn on when, and for how long.It is connected to a set of valves that regulate the flow of water into a specific zone in your sprinkler system.e'll start with the controller. This is an electronic, computerized unit that is the brains behind the sprinkler system. The controller utilizes a timer that tells your system which set of sprinkler heads need to turn on when, and for how long.
Hawaiian eruptions are a type of volcanic eruption, named after the Hawaiian volcanoes with which this eruptive type is hallmark. Hawaiian eruptions are the calmest types of volcanic events, characterized by the effusive eruption of very fluid basalt-type lavas with low gaseous content.everal types of volcanic eruptions âduring which lava, tephra (ash, lapilli, volcanic bombs and blocks), and assorted gases are expelled from a volcanic vent or fissure âhave been distinguished by volcanologists. These are often named after famous volcanoes where that type of behavior has been observed.
The Hawaiian shield volcanoes are the largest volcanoes on earth (e.g. Peterson & Moore 1987) rising some 9 km above the ocean floor (see image), with volumes of 42,500 and 24,800 cubic kilometers (not counting subsidence) for Mauna Loa and Mauna Kea, respectively.t was originally written for a NASA-sponsored workshop about Hawaiian volcanism. We hope that with this review you can gain a better understanding of the processes and landforms that are associated with Hawaiian volcanoes. Many of these processes and features can also be found at other basaltic volcanoes on Earth.